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Publication numberUS3589363 A
Publication typeGrant
Publication dateJun 29, 1971
Filing dateJul 25, 1967
Priority dateJul 25, 1967
Also published asCA947174A1, DE1616003B1
Publication numberUS 3589363 A, US 3589363A, US-A-3589363, US3589363 A, US3589363A
InventorsAnton Banko, Charles D Kelman
Original AssigneeCavitron Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Material removal apparatus and method employing high frequency vibrations
US 3589363 A
Abstract  available in
Images(2)
Previous page
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Claims  available in
Description  (OCR text may contain errors)

United States Patent Anton Banko lnventors Brooklyn; Charles D. Kelman, New York, both of. N.Y. Appl. No. 655,790 Filed July 25, 1967 Patented June 29, 1971 Assignee Cavitron Corporation Long Island City, N.Y.

MATERIAL REMOVAL APPARATUS AND METHOD EMPLOYING HIGH FREQUENCY VIBRATIONS 16 Claims, 15 Drawing Figs.

OSCILLATOR B COOLANT SUPPLY A II P FRIED WATER FOREIGN PATENTS 1,429,637 1/1966 France. 790.277 2/1958 Great Britain 415,949 1/1967 Switzerland Primary Examiner-L. W. Trapp AltorneyEdwin C. Pearson ABSTRACT: An instrument for breaking apart and removal of unwanted material, especially suitable for surgical operations such cataract removal, including a handheld instrument having an operative tip vibrating at a frequency in the ultrasonic range with an amplitude controllable up to several thousandths of an inch. The operative tip is itself hollow and is in turn surrounded by a tubular sleeve to form an annular passage. The handpiece includes transducer means for converting a high frequency alternating current into mechanical vibrations and an impedance transformer for coupling these vibrations to the operative tips. Connections are also provided on the handpiece to a source of treatment fluid and a pump. The treatment fluid may be coupled to either the hollow interior of the tool or the surrounding annular passage, while the pump is coupled to the other. During use, the vibration of the operative tip against the tissue to be removed causes the latter to break apart into small particles which are then dispersed in the fluid flowing over the operative region. Concurrently, the pump withdraws the suspension of the tissue particles in the fluid from the operative site. The fluid flow must be regulated so as to control the pressure within limits at the operative site. The instrument is thus suitable for removing tissue from an enclosed area whereby the opening to permit access to the tissue to be removed need only be large enough to admit the tip of the operative tool.

TREATMENT FLUID SUPPLY PATENTEDJUNEQIQYI 3,589,363

OSCILLATOR a AT N COOLANT SUPPLY l? PUMP F D p AMP FR'EQ WATER I INVENTORS. ANTON BANKO CHARLES D. KELM their ATTORNEYS PATENTED JUH29 19m SHEET 2 [IF 2 their ATTORNEYS.

MATERllAL REMOVAL APPARATUS AND METHOD EMPLOYHNG HTGH FREQUENCY VIBRATIONS The present invention relates to material removal devices and methods, and more particularly to an instrument having a working operative tip vibrating at high frequencies and with minute amplitudes for breaking apart and removing material from relatively inaccessible places and techniques for its use. Although by no means limited thereto, the present apparatus is of particular advantage when employed as a surgical instrument for breaking apart and the removal of unwanted tissue.

Vibratory assemblies for the cutting of material have been in use for some time in a wide number of applications. One form of such apparatus employs a slurry formed of particles of abrasive material in a liquid medium in conjunction with an ultrasonically vibrating tool, whereby the vibratory energy imparted to the abrasive particles in the slurry hurl them against the surface to be cut with tremendous accelerations, thereby literally chipping away the material. This technique has been applied with great success to a wide variety of uses, particularly with respect to industrial machine tools.

However, this type of ultrasonic vibratory assembly is ineffective when applied to yielding materials and furthermore, requires a fairly open site whereby the interposition of the slurry between the vibrating tool tip and the work surface can be maintained at all times during the procedure. Moreover, separate means are required for the collection and removal of the spent slurry and debris, and the workpiece generally requires a flushing or washing to clean up the residual abrasive particles tending to adhere to it. U.S. Pats. Nos. 3,075,288, 3,076,904 and 3,213,537 involve high frequency vibratory instruments for particular use in the dental field. The instruments described in these patents do not necessarily require a source of abrasive particles, as described above in respect to industrial equipment. Also, these dental instruments do not have any means for removal of the particles created as a result of the high frequency vibrations, hence would be entirely inapplicable for use in inaccessible places.

The instrument described herein thus lends itself to the performance of delicate surgical procedures in extremely limited areas. One such surgical procedure, for which the instrument has proven especially effective, is the removal of cataracts from the eye. A cataract Operation requires total removal of the clouded lens which is usually accomplished by a 180 incision in the cornea, which is then lifted up to remove the clouded lens in one piece. The inventive instrument of this application obviates the need for such an incision requiring only one incision in the form ofa small aperture to allow the opera tive end of the instrument to be inserted within the eye.

The primary object of the present invention is to provide a vibratory instrument and method which are effective to break apart and remove soft, yielding material without the use of an auxiliary cutting medium and which is particularly adapted for use in restricted, enclosed sites, such as are encountered in surgical procedures.

it is a further object of the present invention to provide a vibratory instrument including a portion readily held and controlled by the human hand which is particularly adapted for use in surgical procedures.

Still another object of the present invention is to provide an instrument including a handpiece having an operative tip capable of vibrating at ultrasonic frequencies with minute amplitudes and having both a source of fluid and a pumping line adjacent its working end, whereby particles of the material to be removed are dispersed within the fluid and withdrawn from the operative site through the pumping line as they are produced so that further cleaning is unnecessary.

Another object of the present invention is to provide suitable power and fluid supplies and pumping means for use with such a handpiece, together with switch means for their control.

A further object of the present invention is to provide various operative tip configurations for use with such a handpiece whereby removal of materials from relatively inaccessible locations is facilitated.

Briefly, the present invention comprises an apparatus having a casing in which is mounted a vibratory assembly for converting electrical energy into high frequency mechanical vibrations which are used to break apart the unwanted tissue. Within said casing there is also a first passage for carrying a treatment fluid to the region where the vibrations are applied and a second passage for carrying a suspension of unwanted material in said treatment fluid away from said region which constitutes the above-mentioned inaccessible place. The apparatus also includes a means for supplying electrical energy to said vibratory assembly for the energization thereof and a means for supplying the treatment of fluid to said first passage and a means of withdrawing said suspension from said second passage.

More specifically, the casing is adapted to be held in the hand, and the vibratory assembly includes a transducer, such as of the magnetostrictive or piezoelectric type, a removable operative tip and a connecting body in the form of an acoustic impedance transformer for supporting the operative tip and coupling the high frequency vibrations thereto.

The requisite electrical power together with a supply of coolant for the transducer is connected to the housing at the transducer end. A supply of treatment fluid, such as a liquid providing a dispersion medium for the particles to be removed, is coupled through a first passage provided in the housing to an outlet adjacent the operative tip. A source of suction, provided by a suitable pumping means, is coupled via a second passage within the housing to a point adjacent the operative tip.

In using the instrument, alternating electrical energy is ap plied to the transducer to set the operative tip in vibratory motion. As the operative tip is applied to the material, the region adjacent the operative site is bathed or flooded with the treatment fluid while the pumping means is activated to withdraw fluid with suspended particles therein from the region.

The high frequency action of the small area output end of the operative tool tip against the material to be removed rapidly breaks it apart into tiny particles, dispersion of which in the fluid medium is enhanced by the vibratory forces engendered in the medium. The pumping means is then effective to withdraw the resultant suspension from the region of operation. The material to be removed is not only broken apart into small particles, but completely withdrawn from its original location. No subsequent flushing or aspiration procedures are necessary.

In order to keep the incision into the cornea as small as possible, the operative tip has a bore through its center forming a part of one of the passages and there is a tubular sleeve coupled to the casing, surrounding a portion of the operative tip to form an annular space thereabout which is part of the other of said passages.

In order to simplify the problem of changing the operative tips during an operation, the front portion of the casing, referred to as a tubular sleeve, is readily removable to provide access to the operative tip which is also removable from the remaining portion of the vibratory assembly. This tubular sleeve includes a sheath which is composed ofa plastic material. Since this sheath is quite small in diameter, in order to minimize the size of the incision, it would be very difficult to manufacture it from any metallic substance and maintain the proper tolerances to provide for the annular space between it and the operative tip. Also, the resiliency of plastic is necessary to avoid any substantial dampening effect on the vibratory assembly should the sheath contact the operative tip. The heat resistant nature of the plastic material also avoids the transmission of any heat to the cornea from the sheath.

For proper operation of the instrument it is necessary to have certain valve and switch means for selectively operating the source ofelectrical energy, withdrawal means and a line to atmospheric pressure. This is particularly important with respect to an operation in the eye, since it is extremely important to be able to maintain the fluid pressure within the eye within certain limits.

Finally, the vibratory assembly must be supported in some manner within the casing and this is effected by the use of resilient sealing means, an example of which are rubber O rings. These sealing means serve the dual purpose of supporting the vibratory assembly at approximately a node of longitu dinal motion so as to have a minimum effect on dampening the motion and also serve to define one of the fluid passages.

The foregoing and other objects, features and advantages of the invention will become apparent from the following more detailed description thereof when taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a pictorial representation of the entire instrument of the invention showing, in perspective, the handpiece and the supporting equipment;

FIG. 2 is an enlarged pictorial representation of the tool tip shown in use, to aid in explaining its action;

FIG. 3 is a view, mostly in cross section, of the handpiece of the invention showing its internal construction;

FIG. 3A is an enlarged cross-sectional view of the tip end of the handpiece of FIG. 3;

FIG. 43 is an enlarged pictorial representation of the top of the handpiece showing the use of the instrument in cataract removal,

FIGS. 5A through SI show various forms of operative tips for use with the instrument; and

FIG. 6 is a schematic diagram of the foot switch control means for the oscillator and pump valves.

In the ensuing detailed description, the invention will be described in terms of its use as a surgical instrument, particularly as applied to cataract removal. However, it will be un derstood that the principles of the invention are not so limiting, and the apparatus described is capable ofa wide variety of material breaking and removal applications, within and outside the medical field.

Turning HOW to FlG. l, the elements of the instrument of the inventi include a handpiece indicated generally at 10, which is of a size and weight as to be comfortably held in the hand and easily manipulated by the user. As will be described in connec 3, the handpiece 10 includes within its outer housing o casing, transducer means for converting high frequctcy electzical energy into mechanical vibrations of high frequency and small amplitude. The requisite high frequency alternating current electrical energy is supplied by a conven tional oscillator included in the unit indicated generally at 12. Insofar as ability to perform tissue removal is concerned a wide range of frequencies is suitable, for example from 1,000 to 100,000 cycles per second. However, a convenient choice of frequency has been found to be approximately 25,000 cps which permits optimum selection of handpiece components, both with respect to overall size and effectiveness, and also is above the range of human hearing, eliminating annoying audible effects obtained at lower frequencies.

The output of the oscillator in unit 12 is connected by a pair of leads enclosed within the conduit 14 and coupled through the end ofthe handpiece remote from the operative tip. As indicated on the face of the unit 12, the oscillator is provided with suitable frequency and amplitude controls, whereby the precise frequency of operation may be tuned over a range and the amplitude of the electrical signals also may be varied. These controls enable tuning of the instrument to resonance and adjustment of the vibration amplitude ofthe operative tip, in accordance with the needs ofthe user.

The unit l2 also provides a source of cooling water for the handpiece which ordinarily is required to carry away the heat generated by the electrical-to-mechanical energy conversion occurring in the handpiece. For this purpose, the conduit 14 also carries a pair of flexible tubes, one for carrying the coo lant into the handpiece end and the other for withdrawing the coolant therefrom. This provides a circulating system for maintaining the temperature of the handpiece at comfortable levels. Unit l2, as illustrated, is provided with a water control valve for adjusting the cooling flow. The coolant may be obtained from a convenient tap or may be incorporated in a closed circulation system having a small pump and a cooling system for the coolant returned from the handpiece.

The supporting equipment for the handpiece further includes a pump R6 (to be referred to as a withdrawal means) and a treatment fluid supply 20. The pump is coupled via conduit l8 and through an opening in the housing of the handpiece to the interior thereof. In addition to providing a source of suction force for the withdrawal of unwanted particles suspended in the treatment fluid, the pump includes valve means whereby the conduit 18 may be selectively coupled to the pump or opened to atmospheric pressure.

The treatment fluid supply 20, which may include a reservoir of a premixed solution of appropriate type and a suitable pump, or mixing means whereby the required solution is prepared on a continuous basis, is connected through conduit 22 and into the interior of the housing of the handpiece. As will be described in greater detail hereinafter, the handpiece includes internal fluid passages coupled to the conduits l8 and 22 whereby, at the operative tip of the instrument, there may be provided both a flow of treatment fluid and a withdrawal of unwanted particles suspended in the treatment fluid.

A switch 2 3 is provided to enable control of the oscillator and pump during manipulation of the handpiece by the sur geon. The switch 24 may be of any convenient type, preferably resting on the floor and including a control lever 25 adapted to be actuated by the foot selectively between several positions. The switch is coupled via conductors 26 to the oscillator housing 12 and the vacuum pump 16 to control the components thereof, as will be described more fully hereinafter.

The manner in which the instrument is used for tissue removal is illustrated in FIG. 2. In the drawing, 32 indicates a cohesive mass (as distinguished from a collection of discrete particles) of undesired tissue located within a region of healthy tissue 30 below the skin 34. To remove the tissue 32 with the present instrument, a small surgical incision 36 is made through the skin adjacent the mass 32 to enable the operative tip of the handpiece 10 to reach the tissue mass 32. As the tip of the handpiece 10 is inserted through the incision 36 and into contact with the unwanted tissue, the surgeon ac tuates the foot switch 24 to apply alternating current power to the instrument to set the tip into vibration and also to actuate the pump 16.

At the same time, the treatment fluid supply is turned on, at controlled pressure, so that at the operative tip of the tool which is brought into contact with the mass 32, three conditions simultaneously obtain. Firstly, the operative tip vibrates at a high frequency rate and with small amplitude against the tissue mass 32 and in the process breaks it apart into minute particles. Concurrently, the treatment fluid supply, which preferably is a solution compatible with the animal tissue being treated (such as saline), floods or bathes the region at the tip end which is being subjected to the vibratory action. Finally, the suction source at the operative tip simultaneously withdraws from the operative site the resultant suspension of the small particles of removed tissue in the treatment fluid bathing the area. The unwanted tissue thus separated from the host body is removed as it is broken apart and, at the same time, leakage of the treatment fluid outside of the operative site is minimized. An equilibrium condition thus exists at the operative site between the treatment fluid, the withdrawal means, and the small leakage.

In employing the instrument as shown in FIG. 2, the surgeon manipulates the handpiece 10 until all of the unwanted tissue has been broken apart and removed from the operative site. If necessary, additional small incisions 36 may be made at various other surface points to permit ready access to the mass of unwanted tissue. However, each of these incisions need be only sufficiently large to admit the slender operative tip of the instrument. This reduces trauma and speeds recovery time, as compared to a massive surgical excision by the usual procedures.

Although the exact mechanism occurring at the working end of the operative tip, which results in breaking apart of the tissue mass into minute particles, is not fully understood at present, it is believed to be a composite of a cutting action by the relatively sharp tip and a fracturing resulting from the large number of impacts of the vibrating tip. Regardless of precisely how the tissue is fragmented, it has been found that the instrument of the invention effectively breaks apart tissue into minute particles, sufficiently small to pass readily through an opening in the operative tip less than l millimeter in diame I81.

The handpiece itself is shown in cross section in FIGS. 3 and 3A. Substantially all of the operative parts of the handpiece are enclosed within a casing indicated at 40, which includes a generally tubular barrel section 40a, a smaller diameter extension section 40b threaded onto the forward end of the barrel 40a, a forward end cap 400 having a small diameter tubular portion extending therefrom (see FIG. 3A) threadedly engaging the forward end of extension 40b, and a rear closure 40d threadedly engaging the rear portion of the barrel 40a. Preferably, all of the portions of the casing 40 are made of a metal such as stainless steel, which is sterilizable and which also provides shielding for the electrical and magnetic components within the handpiece.

The vibratory assembly contained within the casing 40 is composed of a transducer portion 42 and a connecting body 46, the latter preferably in the form of an acoustic impedance transformer. The transducer element 42 may be of any suita ble type capable of converting high frequency alternating current signals into corresponding longitudinal mechanism vibrations. In the embodiment illustrated, the transducer is composed of a stack of thin sheets of magnetostrictive material such as nickel, Permendur, or other similar material, insulated from each other and firmly secured together such as by brazing at the ends. As shown, the stack is divided by a lengthwise elongated opening effectively separating the stack into two separate vibratory sections, with the coil 44 wound about each section or leg separately, in such fashion as to produce in phase vibration in both legs.

The forward end of the stack 42 is coupled, such as by a threaded connection as shown or by a permanent bond, to the input end of the connecting body 46. Preferably, a washer 43 is provided between the end of the stack and the input surface of the member 46 to render the transmission of vibratory energy to the member 46 more effective.

As indicated above, the connecting body 46 preferably is in the form of an acoustic impedance transformer whereby the amplitude of the longitudinal vibrations induced in the stack 42 may be increased for application to the operative tip of the handpiece. For this purpose, the member 46 may be of the type shown in US. Pat. No. 25,033, assigned to the present assignee, formed of a single piece of vibration transmitting material such as Monel metal, having a relatively massive input section 46a and a relatively slender output section 4612, with a tapered transition region 46c. As described in the aforementioned reissue patent, maximum amplification of longitu dinal vibrations in such a member occurs when both the input and output sections of the transformer are equal in length to one-fourth of the wavelength in the material at the frequency of vibration and each of said sections is substantially uniform along its length in cross-sectional area.

However, in many applications, including use in surgical procedures such as described herein, sufiicient amplitude of vibration may be obtained under less than maximum amplitude conditions. Accordingly, it will be understood that a relatively wide variation in dimensioning of the impedance transformer 46 is permissible to allow the instrument to perform its intended function effectively. in fact, many different types of connecting bodies may be employed.

As described in the aforementioned patents of the present assignee, optimum energy conversion in the magnetostrictive transducer 42 is obtained when the longitudinal dimension of the stack is equal to a half wavelength in the material at the applied driving frequency. Considering, then, the overall vibrating structure consisting of the stack 42 and the impedance transformer 46, it will be seen that, ideally, the combined length would be equal to a full wavelength at the operating frequency, with each of the stack and transformer being equal to a half wavelength. This would place loops of motion at the free ends of the stack and transformer, as well as the juncture of the two components, where a minimum stress point would therefore occur.

At the same time, nodes of longitudinal motion would occur approximately midway along the length of the stack 42 and approximately at the junction of the input section 460 and output section 46b of the transformer. The effects of the high stresses at the junction are minimized by providing the tapered transition 46c.

As described in the aforesaid patents, support of such a vibratory structure is best achieved by mounting means located approximately at a node of longitudinal motion whereby minimum damping of such motion results. In FIG. 3, such mounting means are provided in the form of a pair of resilient rings, generally referred to as 0" rings, located in a pair of spaced grooves extending circumferentially around the input section'46a of the transformer, as close as possible to the transition region where the nodal plane would be located. The rings 48 and 50 are of such diameter that they effect a fluidtight seal between the surface of the transformer input section 460 and the inner wall of the housing barrel 40a.

in addition to the spaced sealing rings 48 and 50, a plurality of screws 52 are provided angularly disposed about the axis of the casing, for the purpose of preventing longitudinal or rotational movement of the vibratory structure within the casing and also for radially centering the vibratory structure within the casing. By adjusting the several screws, concentricity of the interior elements of the handpiece and the casing sections may be obtained.

The sealing rings 48 and 50 divide the interior volume of the housing 40 into three independent fluid chambers. The ring 48 in conjunction with the end closure means to be described hereinafter will form a first chamber in which are disposed the magnetostrictive stack 42 and a portion of the transformer input section 46a. An annular chamber of relatively short axial dimension is formed between the two O-rings 48 and 50, and a third chamber is formed forwardly of the ring 50 including the free space within the casing extension 40b.

The rear portion of the casing barrel 40 is sealed off by means ofa grommet 55 which is press fitted into the end of the barrel to form a watertight seal therewith. The grommet is provided with openings through which the electrical leads 45 pass from the conduit 14 to the coil 44. In addition, a coolant fluid inlet tube 54 passes through the grommet 52 and extends within the barrel 40a to a point adjacent the forward end of the stack 42. Fluid outlet tube 56 is also passed through the grommet 52 and into the conduit 14 along with the tube 54. The cooling water supply continually flows into the chamber enclosing the magnetostrictive element from the tube 54, and is withdrawn through the outlet tube 56 after passing over the heat producing elements. It will be understood that the leads 45 and conduits 54 and 56 pass through the grommet 52 in fluid tight relationship.

To provide strain relief for the conduit 14 and minimize entanglement, a wire coil 15 may be wrapped around the portion of the conduit 14 adjacent the handpiece, in place of the plastic tubing enclosing the remainder of the conduit. The coil 15 engages a helical groove provided internally of a retaining element 41. The latter element is compressed about the coil 15 and firmly retained against movement by the threaded cap 40d.

The impedance transformer 46 is provided with an axial bore 47 extending from the free or forward end of the output section 46b and into the input section 460, to a point between the two sealing rings 48, 50. A radial bore 47a connects the bore 47 to the periphery of the transformer 46 and into the annularchamber between the sealing rings. Nipple 56 is connected to the periphery of the handpiece barrel we and is provided with an internal bore extending through the casing and communicating with the annular chamber between the rings 48 and 50 and thus with the bore 497 via the radial bore 470.

A second nipple 58 is connected to the casing extension 30]; at a point near its threaded coupling to the barrel 40a. The latter nipple includes an internal passage communicating with the annular chamber extending forwardly of the sealing ring 50 and including the space between the impedance transformer 46 and the inner walls of the casing sections. As shown best in FlG 3A, this latter chamber extends past the free end of the output section of the connecting body 46b and through the cap Mic.

The operative tool or tip which actually comes into contact with the material to be broken apart and removed is designated by the numeral 60. Referring to H6. 5A, the tip (at) is elongated and provided with a thickened shank portion 604: which preferably is formed with at least a pair of flats to accommodate a wrench for tightening. A threaded connection portion MM is formed integrally with the base portion 60a, and a washer 600, of efficient vibration-transmitting material, is disposed adjacent the shoulder between the portion 60a and 60b. The other end of the tip 60 is shaped in a manner dependent upon the particular type of material or tissue to be broken apart and removed and the shape of the portion to be removed or its surrounding material. In FIG. 5A an acute-angled taper is provided to leave a relatively sharp, rounded edge 60d. An axial bore 6th? extends completely through the tip 60 to provide a fluid passage from threaded end 60!) to the outer or working end ofthe tip.

Referring back now to FIG. 3A, the bore 47 in the transformer 46 is provided at the free end of the output section with internal threads adapted to receive the threaded portion 60b of the tip (it). To attach the tip 60, or to replace one already in position, the end cap 400 is threadedly disengaged from the casing extension 40!; and slid backover and away from the tip 6Q. A small wrench may be used to engage the flats on the base section 60a to remove a tip already in place or to snugly in rt anew tip. The end cap 400 is then replaced and the tool is assembled for use.

The operative tip it), being firmly coupled to the output end of the impedance transformer 46, will be longitudinally vibrated thereby at the operating frequency and essentially with the amplitude available at the end of the output section 46b. The operative tip 6'1 preferably is formed of an extremely hard, sterilizable material, such as titanium, and for most surgical applications is made of extremely small dimension. For example, in the instrument as used for cataract removal operations, the operative tip had an outside diameter of approximately 1 millimeter. Since this is the only portion of the instrument that is brought into contact with the tissue to be broken apart and removed, it will be evident that only a very short incision need to made in the outer surface to permit access of the tip.

Where the material to be broken apart and removed is relatively deep below the surface, it is undesirable for the shank of the operating tip to be brought into contact with the surrounding tissue, especially if that tissue is healthy and not to be removed. Since the tip 60 is vibrating at a high frequency, heat will be developed due to the rubbing action and damage to delicate tissues can result.

To avoid this possibility, a sheath 64 of a strong, heat-resistant and inert material, such as the plastic known as Teflon, is provided. As shown best in FIG. 3A, the sheath 64 is provided with an axial bore of a diameter somewhat greater than the outer diameter of the tip 60 and has a base section with a counterbore that snugly engages the tubular portion extending from the forward end of the end cap 400. The fit between the latter two parts is made such that the sheath 64 may be secured to the end cap 400 with manual pressure but will not shake loose under normal usage.

The barrel of the sheath 64 extends along a considerable length of the operative tip 60 and has an outer diameter of sufficient thickness to provide the necessary structural rigidity. Preferably, it is slightly tapered, as shown. The annular clearance between the inner surface of the sheath s4 and the outer surface of the operative tip 60 serves as an extension of the fluid passage formed between the transformer section 46); and the casing extension 40)).

As will be explained in greater detail in connection with HO. 6, alternating current electrical energy having a superimposed direct voltage bias thereon is coupled from the unit 12 and via conductors 45 to the coil on the transducer 42. The vibratory structure is thereby set into longitudinal vibration at the oscillator frequency, with the consequent vibration of the operative tip 6h. For purposes of example, the amplitude of the alternating current supply may be set such that the work ing end of the tip 6 0 has a stroke amplitude of approximately 0.003 inch. At the same time, of course, a coolant supply is circulating in the chamber housing the transducer structure.

As the operative tip is brought into contact with the material to be broken apart and removed, treatment fluid from the supply 2b is provided through the conduit 22 and the nipple 53 to the passage formed between the connecting body 46 and the casing extension 40b and thence through the annular space between the cap 400, sheath 45 i, and the tip 60. The tissue adjacent the operating tip is thereby bathed with the treatment fluid.

The treatment fluid serves two purposes. in addition to maintaining the operative tip relatively cool during use, thereby reducing possible harm to healthy tissue, it provides a dispersion medium in which particles of tissue are suspended as they are broken away from the tissue mass. it will of course be realized that the treatment fluid is being brought into direct contact with delicate tissue and accordingly must be of a neutral nature. In the case of cataract removal, for example, a balanced isotonic saline solution is suitable for this purpose.

Withdrawal of the suspension of the tissue particles in the treatment fluid is effected through the hollow operative tip, the bore 47 in the transformer 46, the connecting passage 47a and nipple 56, through the conduit l8 and to the withdrawal means, for example a pump l6. During the operative procedure, the volume oftreatment fluid supply is controlled, along with the pump operation, so that a proper amount of treatment fluid is maintained at the operative site and overflow is minimized.

The use of the instrument of the invention as applied to cataract removal is illustrated in FIG. 4. A portion of a simplified cross section of a human eye is shown to illustrate the manner in which the device is employed. The opaque lens or cataract which is to be broken apart and removed to is designated by the numeral 72 and is encased in a membrane including an outer portion 72a known as the anterior capsule and a rear portion 7211 known as the posterior capsule. The iris is designated by the numeral '74 and the major gel-filled portion of the eye, or vitreous, is shown at 76. The cornea, the transparent outer surface of the eye, is shown at 70.

To avoid having to pierce or cut the iris, suitable drugs are administered to dilate the iris to its maximum extent, so that as much of the anterior capsule 72a is exposed as is possible. A small incision 78 is then made in the transparent cornea fluid as far as possible from the center of the pupil area. This incision need only be about l to 3 mm. in length to provide proper access for the operative tip ofthe vibratory assembly.

The anterior capsule 72a is penetrated, first, either by the operative tip of the vibrating assembly or with a surgical in strument. Once an opening in the anterior capsule has been made, such as indicated in FIG. 4, the operative tip is inserted into the body of the cataract 72, whereby the lens tissue mass is broken apart into minute particles. During this portion of the operation, the transducer is energized and the pump is activated to provide suction force at the operative tip, along with a supply oftreatment fluid.

In the space ofa few minutes, all of the cataract tissue 72 is broken apart and the particles, together with the fluid in which they are suspended, withdrawn by the instrument. Thereafter,

the remnants of the anterior capsule and the posterior capsule are withdrawn with capsule forceps. This completes the cataract removal. The small incision 78 is subsequently sutured to conclude the surgical procedure. As compared to the conventional cataract removal, which requires a 180 incision around the cornea, trauma to the patient and recovery time are substantially reduced.

In FIG. 4, the operative tip of the vibratory assembly is illustrated as inserted into the eye with the plastic sheath 64 in place. As the surgeon maneuvers the instrument to reach all of the cataract tissue, any contact that occurs between the instrument and the other parts of the eye is on the sheath, which is not vibrating and therefore cannot damage any of the delicate tissue. In this instance, the sheath also serves to discharge the treatment fluid more directly atthe operative site. It will be understood of course, that the sleeve 64 may be removed and the operative tip employed without it where operative conditions permit.

In the cataract removal procedure, the treatment fluid supply serves a purpose in addition to providing a dispersion medium for the particles of unwanted tissue and a coolant for the operative tip, by serving to maintain sufficient pressure within the anterior chamber of the eye, between the anterior capsule 72a and the cornea 70, whereby collapse of the latter is avoided. v

The operative tip 60 shown in detail in FIG. A is but one of a number of different forms of operative tip that may be employed with the instrument of the present invention. When used for cataract removal, it will be seen that the straight tapered tip shown in FIG. SA will not be able to reach all of the lens tissue within the lens membrane without incurring the danger of piercing the vitreous. To clean out the portions of the lens tissue clinging to relatively inaccessible corners of the lens membrane, operative tips having other shapes are employed. Several possible configurations for this and other purposes are shown in FIGS. 58 to SI.

FIGS. 5B and 5C illustrate, respectively, a symmetrically straight tapered tip end and a symmetrically rounded taper tip end. FIGS. 5D and 5E are two views ofa tip having a relatively blunt end and an opening angled to the axis of the main portion of the tip to provide a spoon shape. Such a tip is used to reach the inaccessible corners of the lens capsule without risking damage to or possible puncture of the vitreous.

FIGS. 5F and 5G and FIGS. 5H and SI show two additional forms of operative tips, each of which incorporates a sharp projection such as might be used for puncturing the anterior capsule of the eye.

The forgoing tip designs represent but a few of the many possible variations which may be employed in the large number of tissue breaking apart and removal applications that can be accomplished with the present instrument.

A suitable switch control a arrangement for the oscillator and coolant supply 12 and the pump 16 (FIG. 1) is shown in FIG. 6. The pump 16 includes two input lines, 80 and 82, and a discharge line 92 to a drain or waste line. The pump preferably is of the continuous acting type and therefore is either pumping fluid from a sump or reservoir through input line 80 or from the operative site through the handpiece and conduits l8 and 82. Control of the conduits 80 and 82 is effected by solenoid valves 86 and 88 respectively, so that the pump is pulling fluid through one or the other at any given time.

Under certain conditions, during the course of surgical procedures, it may be desired not to withdraw fluid from the operative site, but merely to maintain a static pressure condition thereat. For this purpose, an additional conduit 84 is coupled to in the input line 82 under control of an additional solenoid valve 90.

The switch 24, having a foot-actuated control arm 25, not only controls the operation of the pump 16 but also the application of energy from the oscillator in unit 12 to the coil on the handpiece transducer. As shown in FIG. 6, the switch has three positions, A, B, and C, the position A having a pair of spaced contacts'94, the position B having a pair of spaced contacts 96, and position C having two pairs of spaced contacts 98 and 100. The switch arm 25 is pivoted at one end and includes a pair of spaced conductive segments 25a and 25b, separated by insulating material. When in position C, as shown in the drawing, the segment 25a bridges the contact pair 98 while the segment 25b bridges the contact pair 100. In positions A and B, the segment 25a bridges the contact pairs 94 and 96 respectively.

A source of operating voltage 102 is coupled to one contact of each of the contact pairs 94, 96 and 98. The other contact of contact pair 94 is coupled to the inputs of both solenoid valves 86 and 90. The other contacts of pairs 96 and 98 are connected in common to the control input of solenoid valve 88. The contact pair 100 interrupts a lead from the oscillator 12 to the handpiece whereby energy is delivered to the latter only when the segment 25b bridges the contact 100, as shown.

The switch arm 25 is spring urged, such as by a coil spring 104, so that its normal position is in position A, bridging contacts 94. Each of the solenoid valves 86, 88 and are normally in their closed position, that is, with no electrical power supplied to their control inputs, they close the channels in which they are interposed.

With the switch are in position A, the contacts 94 are bridged, permitting connection of the source 102 to both valves 86 and 90. These two valves are thus opened, connecting the pump input to the reservoir or sump and opening the conduit 18 to atmospheric pressure. The valve 88 remains closed.

With the switch arm in position B, bridging contacts 96, valve 88 is opened while valves 86 and 90 remain closed. The pump 16 then is coupled directly to the conduit 18 and thus provides a suction force at the tip of the handpiece. It will be noted, that in both positions A and B, the output of the oscillator 12 is not connected to the handpiece and consequently, the operative tip 60 is not set into vibratory motion.

With the switch arm in position C as shown, valve 88 is opened, valves 86 and 90 are closed and the biassed alternating current output of the oscillator is coupled to the hand piece. This establishes the full operative condition of the handpiece, i.e., high frequency vibration of the operative tip and the establishment of a suction force to withdraw fluid from the operative site.

During the operative procedure, control of the treatment fluid supply will be maintained preferably by an assistant to the operating surgeon. Depending upon his needs at the moment, the surgeon will direct the assistant to control the pressure of the fluid supply, between an Off" or no supply position and a High condition, under which maximum flow into the operative site is obtained. (See FIG. 1). At the same time, the amplitude of the oscillator output will be controlled to produce the proper stroke amplitude at the operative tip. Adjustment of the latter is desirable to permit both removal in gross of unwanted tissue as well as the cleaning up of small bits of material where care must be exercised to avoid damaging surrounding tissue.

It will be apparent from the foregoing, that a novel, improved form of material breaking apart and removal apparatus has been disclosed, by means of which unwanted material, such as animal tissue, may be broken apart into minute particles and removed rapidly and with a minimum of damage to surrounding materials. By virtue of the controlled fluid supply and pump, material may be removed from the operative site as it is broken apart thereby eliminating the necessity for subsequent cleansing operations and minimizing obscuring of the operative site during the procedure.

It will also be recognized that many variations of the particular apparatus disclosed will occur to those skilled in the art, without departing from the spirit of the invention, For example, the flow passages for the treatment fluid supply to the operative site and the withdrawal of the suspension from the operative site may be interchanged, such that the fluid is transmitted through the hollow operative tip and withdrawn llll through the annular space between the tip and the sleeve 64. Moreover, more sophisticated control arrangements for the oscillator pump and treatment fluid supply may be employed and various other tip shapes are possible, within the teaching of the present invention. Accordingly, the invention is to be deemed limited only by the scope ofthe appended claims.

We claim:

1. Apparatus for the breaking apart and removal of animal tissue from an enclosed area, an elongated working tip adapted to have one end placed directly against the tissue and capable of supporting ultrasonic vibrations, means for apply ing ultrasonic vibrations of variable amplitude and duration to said working tip, means for supplying a treatment fluid to bathe said tissue in the region adjacent said working tip, and pumping means adjacent said working tip for withdrawing the suspension of particles of said tissue of said fluid resulting from ultrasonic vibration ofsaid working tip.

2. Apparatus for the breaking apart and removal of animal tissue and the like comprising, an elongated, hollow working tip adapted to have one end placed against the tissue to be removed and capable of supporting ultrasonic vibrations, means for applying ultrasonic vibrations to said working tip, means including a tubular sleeve surrounding a portion of said working tip for providing a first fluid passage between said tip and a point remote therefrom, means coupled to said tip for providing a second fluid passage between the hollow interior of said tip and a point remote therefrom, means for supplying a fluid to one of said passages and means for applying a suction force to the other ofs aid passages.

3. A surgical instrument adapted to be held in the hand and moved freely during operative use comprising, a casing of size and configuration comfortable to the hand, transducer means within said casing for generating high frequency mechanical vibrations upon excitation with a high frequency alternating current electrical signal, an operative tool external of said casing and coupled to said transducer means to be vibrated thereby, a first fluid passage extending through said casing and in surrounding relation to at least a portion of said operative tool, and a s cond passage formed in part internally of said operative tcoi and extending into said casing, one of said passages being adapted to conduct a fluid to said operative tool and the other of said passages being adapted to withdraw fluid from the. gion adjacent said operative tool.

[tppa according to claim 3 above wherein said operative tool as elongated and formed with an axial bore providing a part ofsaid passage.

5. Apparatus according to claim 3 above wherein said casing includes an extension surrounding and spaced from the peripheral surface ofa portion of said tool, the space between the inner surface of said casing extension and said peripheral surface ofsaid took providing a part ofsaid first passage.

6. Apparatus according to claim 3 wherein said transducer means includes an acoustic impedance transformer having a relatively massive input section and a relatively slender output section, said output section extending within said casing extension and being coupled at its free end to said too], said output section having a cross-sectional area smaller than the internal cross-sectional area of said casing extension, the spacing therebetween forming a continuation of said first passage, said transformer further having an axial bore extending from the free end of said output section to a point within said input section, and a radial bore from said axial bore to the periphery of said input section, said axial and radial bores forming a continuation of said second passage.

7. Apparatus according to claim 6 above further comprising a pair of spaced-apart resilient sealing means around said input section of said transformer within said casing, each of said sealing means providing a circumferential fluidtight seal between said input section and said casing, the peripheral opening of said radial bore being between said sealing means.

8. Apparatus according to claim 6 above further comprising a first opening in said casing located between said sealing means, a second opening in said casing located between said casing extension and the sealing means closest to the output section of said transformer, and means mounted exteriorly of said casing adjacent each of said openings adapted to be con nected to a fluid conduit.

9. A surgical instrument for breaking apart and removing unwanted material comprising, a handpiece including transducer means for converting high frequency alternating current into high frequency mechanical vibrations, an operative tip coupled to said transducer means to be vibrated thereby, said tip having an axial bore therethrough defining a first passage sleeve means surrounding and spaced from said tip defining a second passage, a source of high frequency alternating current coupled to said transducer, a source of treatment fluid coupled to one of said passages, pumping means coupled to the other passage for withdrawing a suspension of unwanted material in said treatment fluid, and switch means for controlling the application of said alternating current and the suction force provided by said pumping means to said handpiece.

W. The apparatus of claim 9 further comprising valve means interposed between said pumping means and said handpiece, and control means for said valve means for selectively coupling the axial bore in said tip to said pumping means or to atmospheric pressure.

11. The apparatus of claim 10 wherein said switch means includes a control member selectively movable between a first position in which no alternating current is supplied to said transducer means and said valve control means couples the axial bore in said tip to atmospheric pressure, a second position in which no alternating current is supplied to said transducer means and said valve control means couples the axial bore in said tip to said pumping means, and a third position in which alternating current is supplied to said transducer means and said valve control means couples the axial bore in said tip to said pumping means.

12. The apparatus of claim 9 wherein said sleeve means in cludes a readily removable sheath extending to a point closely adjacent the free end of said operative said sheath being formed ofa relatively hard, heat resistant, plastic material.

13. The apparatus of claim 3 wherein said casing is formed ofa material providing a magnetic and electrical shield for the components enclosed therein.

14. The apparatus of claim 9 wherein said source of fluid includes control means for maintaining the pressure ofsaid fluid at a level such that an equilibrium condition between supply and removal offluid at the operative site may be maintained.

i5. Method for the breaking apart and removal of a cohesive mass of unwanted material from an enclosed area comprising the simultaneous steps of, applying high frequency vibrations directly to the unwanted material to reduce said mass of material to small particles, bathing the material in the region in which said vibrations are applies with a treatment fluid, and withdrawing the resulting suspension of particles in said treatment fluid.

16. Method for the breaking apart and removal of animal tissue and the like from an enclosed area, employing an elongated working tip comprising the simultaneous steps of, apply ing ultrasonic vibrations of variable amplitude and duration to said working tip in contact with said tissue, supplying a treatment fluid to bathe said tissue in the region adjacent said working tip, and withdrawing the suspension of particles of said tissue in said fluid so that the pressure within the enclosed area is controlled.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3075288 *Dec 24, 1954Jan 29, 1963Cavitron Ultrasonics IncDental instrument
US3076904 *Aug 29, 1958Feb 5, 1963Cavitron CorpAcoustically vibrated material cutting and removing devices
US3213537 *Sep 11, 1961Oct 26, 1965Cavitron CorpSupply and control apparatus for vibratory cutting device
US3352303 *Jul 28, 1965Nov 14, 1967Lawrence J DelaneyMethod for blood clot lysis
US3358677 *Oct 23, 1964Dec 19, 1967Sheldon Edward EmanuelSupersonic therapeutic device with means for introducing fluid into a body cavity
US3380446 *Sep 3, 1965Apr 30, 1968Leonard G. MartinDental applicator
CH415949A * Title not available
FR1429637A * Title not available
GB790277A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3693613 *Dec 9, 1970Sep 26, 1972Cavitron CorpSurgical handpiece and flow control system for use therewith
US3736938 *Nov 15, 1971Jun 5, 1973NasaOphthalmic method and apparatus
US3805787 *Jun 16, 1972Apr 23, 1974Surgical Design CorpUltrasonic surgical instrument
US3818913 *Aug 30, 1972Jun 25, 1974Wallach MSurgical apparatus for removal of tissue
US3882872 *Apr 25, 1973May 13, 1975Henry T DinkelkampMethod and apparatus for cataract surgery
US3908661 *Jan 31, 1974Sep 30, 1975Steven G KramerSurgical instruments
US3930505 *Dec 2, 1974Jan 6, 1976Hydro Pulse CorporationSurgical apparatus for removal of tissue
US3941122 *Apr 8, 1974Mar 2, 1976Bolt Beranek And Newman, Inc.High frequency ultrasonic process and apparatus for selectively dissolving and removing unwanted solid and semi-solid materials and the like
US3942519 *Aug 12, 1974Mar 9, 1976Ultrasonic Systems, Inc.Method of ultrasonic cryogenic cataract removal
US3952732 *Oct 21, 1974Apr 27, 1976Shock John PUltrasonic cataract removal method and apparatus
US3956826 *Mar 19, 1974May 18, 1976Cavitron CorporationUltrasonic device and method
US3990452 *Jun 13, 1975Nov 9, 1976Fibra-Sonics, Inc.Medical machine for performing surgery and treating using ultrasonic energy
US3996935 *Jan 18, 1973Dec 14, 1976Surgical Design CorporationSurgical-type method for removing material
US4016882 *Mar 5, 1975Apr 12, 1977Cavitron CorporationNeurosonic aspirator and method
US4033349 *Apr 13, 1976Jul 5, 1977The United States Of America As Represented By The Administrator Of The National Aeronautics And Space AdministrationCorneal seal device
US4041947 *Jun 23, 1975Aug 16, 1977Cavitron CorporationFlow control system
US4047532 *Apr 21, 1975Sep 13, 1977Phillips Jack LVacuum forcep and method of using same
US4052987 *Apr 1, 1976Oct 11, 1977Cavitron CorporationAutomatic aspiration apparatus
US4063557 *Apr 1, 1976Dec 20, 1977Cavitron CorporationUltrasonic aspirator
US4078564 *Feb 24, 1976Mar 14, 1978Novo Enzyme CorporationIntralenticular cataract surgery
US4135516 *Feb 24, 1977Jan 23, 1979Novo Laboratories, IncorporatedDelivery apparatus and method for treatment of intralenticular cataracts with exogenous enzymes
US4191176 *Aug 23, 1977Mar 4, 1980Novo Laboratories, Inc.Intralenticular cataract surgery
US4204328 *Nov 14, 1977May 27, 1980Kutner Barry SVariable diameter aspirating tip
US4223676 *Dec 19, 1977Sep 23, 1980Cavitron CorporationUltrasonic aspirator
US4274411 *Mar 30, 1979Jun 23, 1981Dotson Robert S JunFluid operated ophthalmic irrigation and aspiration device
US4314560 *Nov 28, 1979Feb 9, 1982Helfgott Maxwell APowered handpiece for endophthalmic surgery
US4316465 *Nov 29, 1979Feb 23, 1982Dotson Robert S JunOphthalmic handpiece with pneumatically operated cutter
US4332558 *May 20, 1980Jun 1, 1982Lustig Leopold PDental scaling apparatus
US4411652 *Aug 21, 1981Oct 25, 1983The Regents Of The University Of CaliforniaInternally sterile pulsatile infusor system
US4417578 *Mar 20, 1981Nov 29, 1983Surgical DesignUltrasonic transducer with energy shielding
US4493694 *May 25, 1984Jan 15, 1985Cooper Lasersonics, Inc.Ultrasonic surgical apparatus
US4504264 *Sep 24, 1982Mar 12, 1985Kelman Charles DSurgical instrument
US4515583 *Oct 17, 1983May 7, 1985Coopervision, Inc.Operative elliptical probe for ultrasonic surgical instrument and method of its use
US4516398 *Jun 5, 1984May 14, 1985Cooper Lasersonics, Inc.Method of use of an ultrasonic surgical pre-aspirator having a orifice by-pass
US4528979 *Mar 18, 1982Jul 16, 1985Kievsky Nauchno-Issledovatelsky Institut Otolaringologii Imeni Professora A.S. KolomiiobenkaFor simultaneously cooling and ultrasonically irradiating tissue
US4530356 *Feb 8, 1983Jul 23, 1985Helfgott Maxwell AOphthalmic surgical instrument with beveled tip
US4535759 *Sep 30, 1982Aug 20, 1985Cabot Medical CorporationUltrasonic medical instrument
US4542542 *Jul 21, 1983Sep 24, 1985Innovative Surgical Products, Inc.Correction of defects in the eye and compositions therefor
US4608050 *Jul 21, 1983Aug 26, 1986Innovative Surgical Products, Inc.Correction of defects in the eye and compositions therefor
US4634420 *Oct 31, 1984Jan 6, 1987United Sonics IncorporatedApparatus and method for removing tissue mass from an organism
US4634423 *Apr 30, 1984Jan 6, 1987Bailey Jr Paul FOphthalmological method and instrument for implantation of posterior chamber intraocular lens
US4643717 *Sep 16, 1985Feb 17, 1987Site Microsurgical Systems, Inc.Aspiration fitting adaptor
US4655197 *Dec 1, 1982Apr 7, 1987Snyder Laboratories, Inc.Lavage system with variable frequency, flow rate and pressure
US4660573 *May 8, 1985Apr 28, 1987Fibra-Sonics, Inc.Ultrasonic lithotriptor probe
US4672965 *Aug 16, 1984Jun 16, 1987Gilbert BaumSurgical apparatus
US4683884 *Apr 11, 1986Aug 4, 1987Md EngineeringNoise attenuating smokeless surgical device
US4689040 *Apr 29, 1985Aug 25, 1987Thompson Robert JTip for a phacoemulsification needle
US4692139 *Sep 30, 1985Sep 8, 1987Stiles Frank BCatheter for effecting removal of obstructions from a biological duct
US4713051 *May 21, 1985Dec 15, 1987Coopervision, Inc.Cassette for surgical irrigation and aspiration and sterile package therefor
US4731079 *Nov 26, 1986Mar 15, 1988Kingston Technologies, Inc.Intraocular lenses
US4741731 *Feb 19, 1986May 3, 1988Fibra-Sonics, Inc.Vented ultrasonic transducer for surgical handpiece
US4747820 *Apr 9, 1986May 31, 1988Cooper Lasersonics, Inc.Irrigation/aspiration manifold and fittings for ultrasonic surgical aspiration system
US4750488 *Feb 27, 1987Jun 14, 1988Sonomed Technology, Inc.Vibration apparatus preferably for endoscopic ultrasonic aspirator
US4750902 *May 19, 1986Jun 14, 1988Sonomed Technology, Inc.Endoscopic ultrasonic aspirators
US4787889 *Nov 9, 1987Nov 29, 1988Coopervision, Inc.Ophthalmological surgical instrument
US4808154 *Oct 26, 1983Feb 28, 1989Freeman Jerre MPhacoemulsification/irrigation and aspiration sleeve apparatus
US4827911 *Apr 2, 1986May 9, 1989Cooper Lasersonics, Inc.Method and apparatus for ultrasonic surgical fragmentation and removal of tissue
US4832021 *Oct 30, 1987May 23, 1989Cooper Lasersonics, Inc.Apparatus and method for assembly and disassembly of interchangeable surgical acoustic members
US4832683 *Jul 15, 1986May 23, 1989Sumitomo Bakellite Company LimitedSurgical instrument
US4838853 *Feb 5, 1987Jun 13, 1989Interventional Technologies Inc.Apparatus for trimming meniscus
US4846790 *May 26, 1988Jul 11, 1989Cooper Lasersonics, Inc.Ultrasonic surgical system with irrigation manifold
US4861332 *Nov 26, 1986Aug 29, 1989Ultramed CorporationUltrasonic probe
US4869715 *Apr 21, 1988Sep 26, 1989Sherburne Fred SUltrasonic cone and method of construction
US4870953 *Nov 13, 1987Oct 3, 1989Donmicheal T AnthonyIntravascular ultrasonic catheter/probe and method for treating intravascular blockage
US4908015 *Jul 26, 1988Mar 13, 1990Anis Aziz YCataract removal technique
US4921476 *May 2, 1988May 1, 1990Cavitron, Inc.Method for preventing clogging of a surgical aspirator
US4921477 *Jun 21, 1989May 1, 1990The Cooper Companies, Inc.Surgical irrigation and aspiration system with dampening device
US4922902 *Dec 16, 1987May 8, 1990Valleylab, Inc.Method for removing cellular material with endoscopic ultrasonic aspirator
US4931047 *Sep 30, 1987Jun 5, 1990Cavitron, Inc.Method and apparatus for providing enhanced tissue fragmentation and/or hemostasis
US4935005 *Feb 1, 1989Jun 19, 1990Nestle, S.A.Opthalmic fluid flow control system
US4989583 *Oct 21, 1988Feb 5, 1991Nestle S.A.Ultrasonic cutting tip assembly
US5011471 *Dec 23, 1988Apr 30, 1991Sumitomo Bakelite Company LimitedExcretions treating apparatus
US5015227 *Apr 3, 1990May 14, 1991Valleylab Inc.Apparatus for providing enhanced tissue fragmentation and/or hemostasis
US5019037 *Jul 6, 1989May 28, 1991Alcon Laboratories, Inc.Pneumatic retinopexy injector
US5057098 *Sep 16, 1988Oct 15, 1991Ophthalmocare, Inc.Apparatus and method for extracting cataract tissue
US5058590 *May 1, 1989Oct 22, 1991Richard Wolf GmbhApparatus for dispersing fluids for dissolution or concretions in a bodily cavity
US5066276 *Jun 9, 1989Nov 19, 1991Alcon Laboratories, Inc.Method and apparatus for injecting viscous fluid into the eye to lift pre-retinal and post-retinal membrane with linear pressure control
US5084012 *Mar 22, 1991Jan 28, 1992Kelman Charles DApparatus and method for irrigation and aspiration of interior regions of the human eye
US5112300 *Apr 3, 1990May 12, 1992Alcon Surgical, Inc.Method and apparatus for controlling ultrasonic fragmentation of body tissue
US5112339 *Jun 18, 1990May 12, 1992Ophthalmocare, Inc.Apparatus for extracting cataractous tissue
US5120307 *Aug 22, 1990Jun 9, 1992Alcon Laboratories, Inc.Method for injecting viscous fluid into the eye to life retinal membrane
US5123903 *Feb 7, 1991Jun 23, 1992Medical Products Development, Inc.Disposable aspiration sleeve for ultrasonic lipectomy
US5135481 *May 9, 1990Aug 4, 1992Marwan NemehOphthamalic cannula
US5139504 *Jul 22, 1991Aug 18, 1992Ophthalmocare, Inc.Apparatus, system, and method for softening and extracting cataractous tissue
US5154694 *Mar 8, 1991Oct 13, 1992Kelman Charles DTissue scraper device for medical use
US5154696 *Apr 8, 1991Oct 13, 1992Shearing Steven PCataract lens from the eye of a human
US5157603 *Nov 20, 1989Oct 20, 1992Storz Instrument CompanyControl system for ophthalmic surgical instruments
US5167619 *May 25, 1990Dec 1, 1992Sonokineticss GroupApparatus and method for removal of cement from bone cavities
US5176677 *Nov 17, 1989Jan 5, 1993Sonokinetics GroupEndoscopic ultrasonic rotary electro-cauterizing aspirator
US5185002 *Jun 28, 1991Feb 9, 1993Alcon Surgical, Inc.For use with a surgical irrigation and aspiration system
US5188589 *Oct 10, 1991Feb 23, 1993Alcon Surgical, Inc.Textured irrigating sleeve
US5190517 *Jun 6, 1991Mar 2, 1993Valleylab Inc.Electrosurgical and ultrasonic surgical system
US5199943 *Dec 12, 1991Apr 6, 1993Alcon Surgical, Inc.Ultrasonic surgical handpiece
US5205817 *May 17, 1990Apr 27, 1993Sumitomo Bakelite Company LimitedFor scraping or carving organic tissue by ultrasonic vibration
US5209221 *Sep 20, 1991May 11, 1993Richard Wolf GmbhUltrasonic treatment of pathological tissue
US5221282 *Oct 21, 1992Jun 22, 1993Sonokinetics GroupTapered tip ultrasonic aspirator
US5222960 *May 5, 1992Jun 29, 1993Poley Brooks JCracking and rotating cataract for removal from eye
US5243986 *Oct 15, 1991Sep 14, 1993Richard Wolf GmbhDissolution of concretions in a bodily cavity
US5243997 *Sep 14, 1992Sep 14, 1993Interventional Technologies, Inc.Vibrating device for a guide wire
US5254082 *Apr 9, 1991Oct 19, 1993Haruo TakaseUltrasonic surgical scalpel
US5267954 *May 5, 1992Dec 7, 1993Baxter International Inc.Ultra-sound catheter for removing obstructions from tubular anatomical structures such as blood vessels
US5284484 *May 29, 1991Feb 8, 1994Advanced Osseous Technologies, Inc.Apparatus for implantation and extraction of osteal prostheses
US5286256 *Dec 30, 1992Feb 15, 1994Mackool Richard JFluid infusion sleeve
US5304115 *Jan 11, 1991Apr 19, 1994Baxter International Inc.Ultrasonic angioplasty device incorporating improved transmission member and ablation probe
US5318570 *Jun 11, 1991Jun 7, 1994Advanced Osseous Technologies, Inc.Ultrasonic tool
US5324255 *Jul 10, 1992Jun 28, 1994Baxter International Inc.Angioplasty and ablative devices having onboard ultrasound components and devices and methods for utilizing ultrasound to treat or prevent vasopasm
US5324297 *Mar 5, 1991Jun 28, 1994Advanced Osseous Technologies, Inc.Ultrasonic tool connector
US5328481 *Sep 16, 1991Jul 12, 1994Alcon Laboratories, Inc.Method for injecting viscous fluid into the eye to lift retinal membrane
US5334183 *Apr 9, 1992Aug 2, 1994Valleylab, Inc.Endoscopic electrosurgical apparatus
US5342292 *May 24, 1993Aug 30, 1994Baxter International Inc.Ultrasonic ablation device adapted for guidewire passage
US5342293 *Jun 22, 1993Aug 30, 1994Allergan, Inc.Variable vacuum/variable flow phacoemulsification method
US5344395 *Jan 24, 1992Sep 6, 1994Scimed Life Systems, Inc.Apparatus for intravascular cavitation or delivery of low frequency mechanical energy
US5358505 *Jun 22, 1993Oct 25, 1994Sonokinetics, Inc.Tapered tip ultrasonic aspiration method
US5359996 *Sep 26, 1990Nov 1, 1994Nestle, S.A.Ultrasonic cutting tip and assembly
US5360398 *Nov 4, 1993Nov 1, 1994Grieshaber & Co. Ag SchaffhausenOphthalmological aspiration and irrigation system
US5368557 *May 5, 1993Nov 29, 1994Baxter International Inc.Ultrasonic ablation catheter device having multiple ultrasound transmission members
US5368558 *Jun 3, 1993Nov 29, 1994Baxter International Inc.Ultrasonic ablation catheter device having endoscopic component and method of using same
US5380274 *Oct 12, 1993Jan 10, 1995Baxter International Inc.Ultrasound transmission member having improved longitudinal transmission properties
US5382228 *Sep 28, 1993Jan 17, 1995Baxter International Inc.Method and device for connecting ultrasound transmission member (S) to an ultrasound generating device
US5382251 *Feb 14, 1992Jan 17, 1995Biomet, Inc.Plug pulling method
US5390678 *Oct 12, 1993Feb 21, 1995Baxter International Inc.Method and device for measuring ultrasonic activity in an ultrasound delivery system
US5395240 *Sep 14, 1993Mar 7, 1995Dentsply Research & Development Corp.Sterilizable dental medical handpiece containing electric coil
US5397301 *Jul 19, 1993Mar 14, 1995Baxter International Inc.Ultrasonic angioplasty device incorporating an ultrasound transmission member made at least partially from a superelastic metal alloy
US5405318 *Sep 28, 1993Apr 11, 1995Baxter International Inc.Ultra-sound catheter for removing obstructions from tubular anatomical structures such as blood vessels
US5413556 *Aug 27, 1993May 9, 1995Inventive Systems, Inc.Phacoemulsification handpiece
US5413578 *Jun 14, 1993May 9, 1995Zahedi; AmirDevice for removing a bone cement tube
US5417654 *Feb 2, 1994May 23, 1995Alcon Laboratories, Inc.Elongated curved cavitation-generating tip for disintegrating tissue
US5417672 *Oct 4, 1993May 23, 1995Baxter International Inc.Connector for coupling an ultrasound transducer to an ultrasound catheter
US5427118 *Oct 4, 1993Jun 27, 1995Baxter International Inc.Ultrasonic guidewire
US5433702 *Aug 16, 1993Jul 18, 1995Opthalmocare, Inc.Phaco handpiece providing fingertip control of ultrasonic energy
US5443078 *Jun 29, 1994Aug 22, 1995Interventional Technologies, Inc.Method for advancing a guide wire
US5447509 *Oct 4, 1993Sep 5, 1995Baxter International Inc.Ultrasound catheter system having modulated output with feedback control
US5455766 *Oct 13, 1993Oct 3, 1995Storz Instrument CompanyControl system for ophthalmic surgical instruments
US5456686 *Oct 25, 1993Oct 10, 1995Biomet, Inc.Implantation and removal of orthopedic prostheses
US5474530 *Jun 8, 1994Dec 12, 1995Baxter International Inc.Angioplasty and ablative devices having onboard ultrasound components and devices and methods for utilizing ultrasound to treat or prevent vasospasm
US5492528 *Dec 5, 1994Feb 20, 1996Anis; Azis Y.Removal of tissue
US5524635 *Oct 24, 1994Jun 11, 1996Interventional Technologies Inc.Apparatus for advancing a guide wire
US5547454 *Nov 2, 1993Aug 20, 1996Sandia CorporationIon-induced nuclear radiotherapy
US5562609 *Oct 7, 1994Oct 8, 1996Fibrasonics, Inc.Ultrasonic surgical probe
US5562610 *Oct 7, 1994Oct 8, 1996Fibrasonics Inc.Needle for ultrasonic surgical probe
US5616120 *Feb 6, 1995Apr 1, 1997Andrew; Mark S.Method and apparatus for lenticular liquefaction and aspiration
US5624394 *Oct 28, 1994Apr 29, 1997Iolab CorporationVacuum system and a method of operating a vacuum system
US5667489 *Feb 21, 1995Sep 16, 1997Kraff; Colman RossExpansile surgical sleeve apparatus and method for using same
US5676649 *Oct 4, 1996Oct 14, 1997Alcon Laboratories, Inc.Phacoemulsification cutting tip
US5702270 *Dec 14, 1995Dec 30, 1997Alcon Laboratories, Inc.Surgical handpiece holder
US5718676 *Jun 7, 1995Feb 17, 1998Oversby Pty Ltd.Grooved phaco-emulsification needle
US5722945 *Apr 1, 1996Mar 3, 1998Aziz Yehia AnisRemoval of tissue
US5725570 *Feb 29, 1996Mar 10, 1998Boston Scientific CorporationTubular medical endoprostheses
US5730718 *Apr 29, 1996Mar 24, 1998Aziz Yehia AnisRemoval of tissue
US5733266 *Jul 26, 1996Mar 31, 1998Gravlee, Jr.; Joseph F.Hypodermic needle
US5769879 *Jun 7, 1995Jun 23, 1998Medical Contouring CorporationMicrowave applicator and method of operation
US5775901 *Mar 7, 1996Jul 7, 1998Hu-Friedy Mfg. Co., Ltd.Insert for ultrasonic scaler
US5776155 *Dec 23, 1996Jul 7, 1998Ethicon Endo-Surgery, Inc.Methods and devices for attaching and detaching transmission components
US5788679 *Jun 26, 1996Aug 4, 1998Gravlee, Jr.; Joseph F.Phacoemulsification needle
US5795328 *Jun 12, 1996Aug 18, 1998Iolab CorporationVacuum system and a method of operating a vacuum system
US5810766 *Feb 28, 1995Sep 22, 1998Chiron Vision CorporationInfusion/aspiration apparatus with removable cassette
US5810859 *Feb 28, 1997Sep 22, 1998Ethicon Endo-Surgery, Inc.Apparatus for applying torque to an ultrasonic transmission component
US5811909 *Jan 10, 1997Sep 22, 1998Wuchinich; David G.Superthermoelastic resonators
US5827292 *Feb 12, 1996Oct 27, 1998Anis; Aziz YehiaRemoval of tissue
US5827297 *Sep 30, 1993Oct 27, 1998Medicamat S.A.Device for transplanting small diameter hair grafts
US5885243 *Dec 11, 1996Mar 23, 1999Alcon Laboratories, Inc.For removal of lens from eye; cataract surgery
US5921999 *Jun 3, 1997Jul 13, 1999Dileo; FrankSystem and method employing a pie-zoelectric crystal and transverse oscillation to perform a capsulotomy
US5935096 *Jul 10, 1997Aug 10, 1999Oversby Pty Ltd.Grooved phaco-emulsification needle
US5938633 *Jul 9, 1997Aug 17, 1999Ethicon Endo-Surgery, Inc.Ultrasonic surgical devices
US5938677 *Oct 15, 1997Aug 17, 1999Alcon Laboratories, Inc.Control system for a phacoemulsification handpiece
US5941887 *Sep 3, 1996Aug 24, 1999Bausch & Lomb Surgical, Inc.Sleeve for a surgical instrument
US5957943 *Mar 5, 1997Sep 28, 1999Ethicon Endo-Surgery, Inc.Method and devices for increasing ultrasonic effects
US5968060 *Feb 28, 1997Oct 19, 1999Ethicon Endo-Surgery, Inc.Ultrasonic interlock and method of using the same
US5984904 *Aug 22, 1996Nov 16, 1999Bausch & Lomb Surgical, Inc.Sleeve for a surgical instrument
US5989209 *Jun 30, 1997Nov 23, 1999Oversby Pty Ltd.Grooved phaco-emulsification needle
US5989212 *Aug 6, 1998Nov 23, 1999Alcon Laboratories, Inc.Pumping chamber for a liquefaction handpiece having a countersink electrode
US5989274 *Dec 20, 1996Nov 23, 1999Ethicon Endo-Surgery, Inc.Methods and devices for improving blood flow to a heart of a patient
US5989275 *Feb 28, 1997Nov 23, 1999Ethicon Endo-Surgery, Inc.Damping ultrasonic transmission components
US5993409 *Nov 25, 1997Nov 30, 1999Surgin Surgical Instrumentation, Inc.Needle for surgical use
US5997499 *Aug 6, 1998Dec 7, 1999Alcon Laboratories, Inc.Tip for a liquefaction handpiece
US6007513 *Sep 5, 1997Dec 28, 1999Aziz Yehia AnisRemoval of tissue
US6013048 *Nov 7, 1997Jan 11, 2000Mentor CorporationUltrasonic assisted liposuction system
US6024725 *Nov 27, 1996Feb 15, 2000Mentor CorporationReducing tissue trauma and fluid loss during surgery
US6028387 *Jun 29, 1998Feb 22, 2000Alcon Laboratories, Inc.Ultrasonic handpiece tuning and controlling device
US6051010 *Dec 23, 1996Apr 18, 2000Ethicon Endo-Surgery, Inc.Methods and devices for joining transmission components
US6074358 *Mar 25, 1997Jun 13, 2000Andrew; Mark S.Method and apparatus for lenticular liquefaction and aspiration
US6077285 *Jun 29, 1998Jun 20, 2000Alcon Laboratories, Inc.Torsional ultrasound handpiece
US6080128 *Jun 4, 1998Jun 27, 2000Alcon Laboratories, Inc.Liquefaction handpiece
US6083191 *Aug 9, 1993Jul 4, 2000Sherwood Services AgUltrasonic surgical apparatus
US6083192 *Feb 14, 1997Jul 4, 2000Bath; Patricia E.Pulsed ultrasound method for fragmenting/emulsifying and removing cataractous lenses
US6110162 *Aug 16, 1999Aug 29, 2000Alcon Laboratories, Inc.Liquefaction handpiece
US6126668 *Apr 24, 1998Oct 3, 2000Innovative Optics, Inc.Microkeratome
US6139554 *Jun 10, 1999Oct 31, 2000Karkar; Maurice N.Multipurpose tissue resurfacing handpiece
US6156036 *Jun 11, 1999Dec 5, 2000Alcon Laboratories, Inc.Surgical handpiece tip
US6179805Oct 28, 1999Jan 30, 2001Alcon Laboratories, Inc.Liquefracture handpiece
US6179808Jun 18, 1999Jan 30, 2001Alcon Laboratories, Inc.Method of controlling the operating parameters of a surgical system
US6196989Oct 28, 1999Mar 6, 2001Alcon Laboratories, Inc.Tip for liquefracture handpiece
US6200326 *Apr 28, 1999Mar 13, 2001Krishna NarayananMethod and apparatus for hair removal using ultrasonic energy
US6208903Jun 23, 1998Mar 27, 2001Medical Contouring CorporationMicrowave applicator
US6277084May 5, 1997Aug 21, 2001Boston Scientific CorporationUltrasonic medical device
US6283974Nov 14, 1997Sep 4, 2001Aaron James AlexanderSurgical tip for phacoemulsification
US6287274Nov 17, 1999Sep 11, 2001Alcon Manufacturing, Inc.Liquefaction handpiece
US6287331May 12, 1998Sep 11, 2001Boston Scientific CorporationTubular medical prosthesis
US6290721Oct 21, 1997Sep 18, 2001Boston Scientific CorporationTubular medical endoprostheses
US6315755Dec 14, 1999Nov 13, 2001Alcon Manufacturing, Ltd.Method of controlling a liquefracture handpiece
US6331171Oct 1, 1999Dec 18, 2001Alcon Laboratories, Inc.Tip for a liquefracture handpiece
US6340355Aug 22, 1997Jan 22, 2002Graham David BarrettIntraocular irrigation/aspiration device
US6352519May 18, 2000Mar 5, 2002Aziz Yehia AnisRemoval of tissue
US6387109Aug 3, 1999May 14, 2002Ethicon Endo-Surgery, Inc.Methods and device for improving blood flow to heart of a patient
US6398759Oct 17, 2000Jun 4, 2002Alcon Manufacturing, Ltd.Liquefracture handpiece tip
US6402769Jan 21, 2000Jun 11, 2002Alcon Universal Ltd.Torsional ultrasound handpiece
US6419654 *Feb 1, 2000Jul 16, 2002Jeffrey S. KadanDiagnostic needle arthroscopy and lavage system
US6425905Nov 29, 2000Jul 30, 2002Med-Logics, Inc.Method and apparatus for facilitating removal of a corneal graft
US6428508Feb 1, 2000Aug 6, 2002Enlighten Technologies, Inc.Pulsed vacuum cataract removal system
US6428510 *May 12, 2000Aug 6, 2002Jeffrey S. KadanDiagnostic needle arthroscopy and lavage system
US6432078 *Jun 19, 2000Aug 13, 2002Gholam A. PeymanSystem and method for removing cataract or other cells in an eye using water jet and suction
US6491661Nov 10, 1999Dec 10, 2002Alcon Manufacturing, Ltd.Infusion control system
US6497709May 5, 1997Dec 24, 2002Boston Scientific CorporationMetal medical device
US6500157 *Sep 3, 1998Dec 31, 2002Ronald B. LutherIntravenous infusion needle with soft body
US6527802Sep 23, 1997Mar 4, 2003Scimed Life Systems, Inc.Clad composite stent
US6544211Feb 26, 1998Apr 8, 2003Mark S. AndrewTissue liquefaction and aspiration
US6551337Jul 19, 2000Apr 22, 2003Omnisonics Medical Technologies, Inc.Ultrasonic medical device operating in a transverse mode
US6575929Dec 14, 2001Jun 10, 2003Alcon Manufacturing, Ltd.Pumping chamber for a liquefaction handpiece
US6579270Feb 21, 2002Jun 17, 2003Alcon Manufacturing, Ltd.Liquefracture handpiece tip
US6589201Mar 14, 2000Jul 8, 2003Alcon Manufacturing, Ltd.Liquefracture handpiece tip
US6589204Jun 27, 2000Jul 8, 2003Alcon Manufacturing, Ltd.Method of operating a liquefracture handpiece
US6648847Feb 11, 2003Nov 18, 2003Alcon Manufacturing, Ltd.Method of operating a liquefracture handpiece
US6660013Oct 5, 2001Dec 9, 2003Omnisonics Medical Technologies, Inc.Apparatus for removing plaque from blood vessels using ultrasonic energy
US6663644Jun 2, 2000Dec 16, 2003Med-Logics, Inc.Cutting blade assembly for a microkeratome
US6676628Nov 22, 1999Jan 13, 2004Alcon Manufacturing, Ltd.Pumping chamber for a liquefracture handpiece
US6676629Apr 7, 2003Jan 13, 2004Mark S. AndrewTissue liquefaction and aspiration for dental treatment
US6689086Jul 29, 1999Feb 10, 2004Advanced Cardiovascular Systems, Inc.Method of using a catheter for delivery of ultrasonic energy and medicament
US6695782Oct 11, 2001Feb 24, 2004Omnisonics Medical Technologies, Inc.Ultrasonic probe device with rapid attachment and detachment means
US6699285Feb 9, 2001Mar 2, 2004Scieran Technologies, Inc.Eye endoplant for the reattachment of a retina
US6702832Oct 15, 2002Mar 9, 2004Med Logics, Inc.Medical device for cutting a cornea that has a vacuum ring with a slitted vacuum opening
US6716028Jul 27, 2001Apr 6, 2004Hu-Friedy Mfg. Co., Inc.Ultrasonic swivel insert
US6733451Mar 25, 2003May 11, 2004Omnisonics Medical Technologies, Inc.Apparatus and method for an ultrasonic probe used with a pharmacological agent
US6748944May 3, 2000Jun 15, 2004Dellavecchia Michael AnthonyUltrasonic dosage device and method
US6811399Mar 4, 2002Nov 2, 2004Hu-Friedy Mfg. Co., Inc.Torque lock for ultrasonic swivelable inserts and method
US6852093 *May 10, 2004Feb 8, 2005Alcon, Inc.Surgical method and apparatus
US6860868Aug 29, 2003Mar 1, 2005Alcon Manufacturing, Ltd.Surgical handpiece
US6863662Dec 30, 2002Mar 8, 2005Ronald B. LutherIntravenous infusion needle with soft body
US6866670Aug 6, 2003Mar 15, 2005Omnisonics Medical Technologies, Inc.Apparatus for removing plaque from blood vessels using ultrasonic energy
US6887083 *Apr 16, 2001May 3, 2005Hideki UmeyamaModel for training of surgical operation of cataract
US6890390May 22, 2003May 10, 2005Lawrence AzarComputer subsystem is used to control the signal parameters for a uniform cavitation energy
US6908451Apr 25, 2002Jun 21, 2005Alcon, Inc.Liquid venting surgical system
US6921385Aug 5, 2002Jul 26, 2005Alcon, Inc.Apparatus for delivery of fluid to opthalmic surgical handpiece
US6929632Jun 27, 2002Aug 16, 2005Advanced Cardiovascular Systems, Inc.Ultrasonic devices and methods for ablating and removing obstructive matter from anatomical passageways and blood vessels
US6984220Apr 11, 2001Jan 10, 2006Wuchinich David GLongitudinal-torsional ultrasonic tissue dissection
US7011520Jan 17, 2003Mar 14, 2006Hu-Friedy Mfg. Co., Inc.Two part ultrasonic swivel insert, with one part rotatable relative to the other
US7011644Jan 7, 2004Mar 14, 2006Andrew Mark STissue liquefaction and aspiration for dental treatment
US7041078Jan 27, 2003May 9, 2006Peyman Gholam ASystem and method for removing cataract or other cells in an eye using water jet and suction
US7044948Dec 4, 2003May 16, 2006Sherwood Services AgCircuit for controlling arc energy from an electrosurgical generator
US7083589 *Dec 13, 2001Aug 1, 2006Surgical Design CorporationUltrasonic instrument with coupler for work tip
US7101392Aug 8, 2001Sep 5, 2006Boston Scientific CorporationTubular medical endoprostheses
US7131860Nov 20, 2003Nov 7, 2006Sherwood Services AgConnector systems for electrosurgical generator
US7137980May 1, 2003Nov 21, 2006Sherwood Services AgMethod and system for controlling output of RF medical generator
US7160268Aug 5, 2002Jan 9, 2007Alcon, Inc.Container for delivery of fluid to ophthalmic surgical handpiece
US7255694Dec 4, 2003Aug 14, 2007Sherwood Services AgVariable output crest factor electrosurgical generator
US7276060Feb 26, 2004Oct 2, 2007Alcon, Inc.Surgical handpiece tip
US7297137Apr 5, 2004Nov 20, 2007Alcon, Inc.Method of detecting surgical events
US7300435Nov 21, 2003Nov 27, 2007Sherwood Services AgAutomatic control system for an electrosurgical generator
US7303557Dec 27, 2004Dec 4, 2007Sherwood Services AgVessel sealing system
US7311700Nov 29, 2000Dec 25, 2007Med-Logics, Inc.LASIK laminar flow system
US7314470Sep 11, 2001Jan 1, 2008Wolfgang MalodobryScar-free removal of tattoos
US7364577Jul 24, 2003Apr 29, 2008Sherwood Services AgVessel sealing system
US7374552 *Aug 3, 2005May 20, 2008Wuchinich David GLongitudinal-torsional ultrasonic tissue dissection
US7396336Oct 27, 2004Jul 8, 2008Sherwood Services AgSwitched resonant ultrasonic power amplifier system
US7416437Aug 23, 2006Aug 26, 2008Sherwood Services AgConnector systems for electrosurgical generator
US7494468Feb 21, 2003Feb 24, 2009Omnisonics Medical Technologies, Inc.Ultrasonic medical device operating in a transverse mode
US7503895Feb 24, 2003Mar 17, 2009Omnisonics Medical Technologies, Inc.Ultrasonic device for tissue ablation and sheath for use therewith
US7513896Jan 24, 2006Apr 7, 2009Covidien AgDual synchro-resonant electrosurgical apparatus with bi-directional magnetic coupling
US7540870Aug 27, 2007Jun 2, 2009Bacoustics, LlcAblative ultrasonic-cryogenic apparatus
US7544177Jan 24, 2003Jun 9, 2009The Regents Of The University Of CaliforniaAerosol device to deliver bioactive agent
US7572242Aug 19, 2005Aug 11, 2009Alcon, Inc.Method of operating an ultrasound handpiece
US7572268Oct 13, 2005Aug 11, 2009Bacoustics, LlcApparatus and methods for the selective removal of tissue using combinations of ultrasonic energy and cryogenic energy
US7625388Feb 28, 2005Dec 1, 2009Alcon, Inc.Method of controlling a surgical system based on a load on the cutting tip of a handpiece
US7628786May 16, 2005Dec 8, 2009Covidien AgUniversal foot switch contact port
US7637907Sep 19, 2006Dec 29, 2009Covidien AgSystem and method for return electrode monitoring
US7640119Jun 30, 2006Dec 29, 2009Alcon, Inc.System for dynamically adjusting operation of a surgical handpiece
US7644603Jun 27, 2005Jan 12, 2010Alcon, Inc.Method of testing a surgical system
US7645255Feb 28, 2005Jan 12, 2010Alcon, Inc.Method of controlling a surgical system based on irrigation flow
US7645256Jul 18, 2005Jan 12, 2010Alcon, Inc.Ultrasound handpiece
US7648465Jun 28, 2005Jan 19, 2010Alcon, Inc.Method of testing a surgical system
US7648499Mar 21, 2006Jan 19, 2010Covidien AgSystem and method for generating radio frequency energy
US7651490Aug 12, 2004Jan 26, 2010Alcon, Inc.Ultrasonic handpiece
US7651492Apr 24, 2006Jan 26, 2010Covidien AgArc based adaptive control system for an electrosurgical unit
US7651493Mar 3, 2006Jan 26, 2010Covidien AgSystem and method for controlling electrosurgical snares
US7695447Jun 8, 2005Apr 13, 2010Alcon, Inc.Apparatus and method for determining that a surgical fluid container is near empty
US7708734Jun 30, 2006May 4, 2010Alcon, Inc.Method for dynamically adjusting operation of a surgical handpiece
US7713202Jul 26, 2005May 11, 2010Alcon, Inc.Method of controlling a surgical system based on a load on the cutting tip of a handpiece
US7722601Apr 30, 2004May 25, 2010Covidien AgMethod and system for programming and controlling an electrosurgical generator system
US7727193Jul 26, 2005Jun 1, 2010Alcon, Inc.Method of controlling a surgical system based on a rate of change of an operating parameter
US7731717Aug 8, 2006Jun 8, 2010Covidien AgSystem and method for controlling RF output during tissue sealing
US7736329Nov 9, 2006Jun 15, 2010Dodick Jack MSurgical instrument with a sleeve for use during eye surgery
US7749217May 6, 2003Jul 6, 2010Covidien AgMethod and system for optically detecting blood and controlling a generator during electrosurgery
US7758538Jul 26, 2005Jul 20, 2010Alcon, Inc.Method of controlling a surgical system based on irrigation flow
US7758585Mar 16, 2005Jul 20, 2010Alcon, Inc.Pumping chamber for a liquefaction handpiece
US7762979Nov 26, 2007Jul 27, 2010Wuchinich David GLongitudinal-torsional ultrasonic tissue dissection
US7766693Jun 16, 2008Aug 3, 2010Covidien AgConnector systems for electrosurgical generator
US7766905Feb 4, 2005Aug 3, 2010Covidien AgMethod and system for continuity testing of medical electrodes
US7776027 *Jul 11, 2002Aug 17, 2010Misonix, IncorporatedMedical handpiece with automatic power switching means
US7780659 *Aug 29, 2003Aug 24, 2010Olympus CorporationUltrasound treatment system
US7780662Feb 23, 2005Aug 24, 2010Covidien AgVessel sealing system using capacitive RF dielectric heating
US7794414Feb 9, 2004Sep 14, 2010Emigrant Bank, N.A.Apparatus and method for an ultrasonic medical device operating in torsional and transverse modes
US7794457Sep 28, 2006Sep 14, 2010Covidien AgTransformer for RF voltage sensing
US7803168Dec 9, 2005Sep 28, 2010The Foundry, LlcAortic valve repair
US7806865May 20, 2009Oct 5, 2010Alcon Research, Ltd.Pressurized irrigation squeeze band
US7811255Feb 28, 2005Oct 12, 2010Alcon, Inc.Method of controlling a surgical system based on a rate of change of an operating parameter
US7824400Mar 3, 2006Nov 2, 2010Covidien AgCircuit for controlling arc energy from an electrosurgical generator
US7834484Jul 16, 2007Nov 16, 2010Tyco Healthcare Group LpConnection cable and method for activating a voltage-controlled generator
US7842032Apr 18, 2007Nov 30, 2010Bacoustics, LlcApparatus and methods for the selective removal of tissue
US7849875Jul 31, 2007Dec 14, 2010Alcon, Inc.Check valve
US7857794Jun 14, 2004Dec 28, 2010Alcon, Inc.Handpiece tip
US7901400Jan 27, 2005Mar 8, 2011Covidien AgMethod and system for controlling output of RF medical generator
US7927328Jan 24, 2007Apr 19, 2011Covidien AgSystem and method for closed loop monitoring of monopolar electrosurgical apparatus
US7947009 *Sep 10, 2007May 24, 2011Carl Zeiss Surgical GmbhSurgical system and method for controlling fluid when treating a cataract with the phacoemulsification technique
US7947039Dec 12, 2005May 24, 2011Covidien AgLaparoscopic apparatus for performing electrosurgical procedures
US7967775Jan 9, 2007Jun 28, 2011Alcon, Inc.Irrigation/aspiration tip
US7967799Mar 16, 2005Jun 28, 2011Alcon, Inc.Liquefaction handpiece tip
US7972328Jan 24, 2007Jul 5, 2011Covidien AgSystem and method for tissue sealing
US7972332Dec 16, 2009Jul 5, 2011Covidien AgSystem and method for controlling electrosurgical snares
US7981074Nov 2, 2006Jul 19, 2011Novartis AgIrrigation/aspiration system
US8012150Apr 30, 2004Sep 6, 2011Covidien AgMethod and system for programming and controlling an electrosurgical generator system
US8016843Aug 7, 2006Sep 13, 2011Alcon Research LtdUltrasonic knife
US8025660Nov 18, 2009Sep 27, 2011Covidien AgUniversal foot switch contact port
US8034049Aug 8, 2006Oct 11, 2011Covidien AgSystem and method for measuring initial tissue impedance
US8043088 *Oct 21, 2008Oct 25, 2011Johnson Douglas BEndodontic procedure employing simultaneous liquefaction and acoustic debridgement
US8048020Jun 3, 2010Nov 1, 2011Alcon, Inc.Method of controlling a surgical system based on irrigation flow
US8062289Apr 24, 2009Nov 22, 2011Bacoustics, LlcAblative ultrasonic-cryogenic apparatus
US8070711Dec 9, 2009Dec 6, 2011Alcon Research, Ltd.Thermal management algorithm for phacoemulsification system
US8080008Sep 18, 2007Dec 20, 2011Covidien AgMethod and system for programming and controlling an electrosurgical generator system
US8096961Jun 27, 2008Jan 17, 2012Covidien AgSwitched resonant ultrasonic power amplifier system
US8104956Oct 23, 2003Jan 31, 2012Covidien AgThermocouple measurement circuit
US8105323Oct 24, 2006Jan 31, 2012Covidien AgMethod and system for controlling output of RF medical generator
US8113057Jun 27, 2008Feb 14, 2012Covidien AgSwitched resonant ultrasonic power amplifier system
US8118777May 26, 2010Feb 21, 2012Cook Medical Technologies LlcSystems and methods for delivering therapeutic agents
US8136779Jul 27, 2010Mar 20, 2012Alcon Research, Ltd.Mounting arrangement for a pressurized irrigation system
US8147485Feb 23, 2009Apr 3, 2012Covidien AgSystem and method for tissue sealing
US8157792 *Feb 26, 2004Apr 17, 2012Haemonetics CorporationWound drainage suction relief
US8172786Jul 16, 2009May 8, 2012Alcon Research, Ltd.Method of operating an ultrasound handpiece
US8187168Jul 7, 2008May 29, 2012David George WuchinichRetractable ultrasonic endoscopic aspirator
US8187262Jun 3, 2009May 29, 2012Covidien AgDual synchro-resonant electrosurgical apparatus with bi-directional magnetic coupling
US8202271Feb 25, 2009Jun 19, 2012Covidien AgDual synchro-resonant electrosurgical apparatus with bi-directional magnetic coupling
US8216220Sep 7, 2007Jul 10, 2012Tyco Healthcare Group LpSystem and method for transmission of combined data stream
US8216223Feb 23, 2009Jul 10, 2012Covidien AgSystem and method for tissue sealing
US8226639Jun 10, 2008Jul 24, 2012Tyco Healthcare Group LpSystem and method for output control of electrosurgical generator
US8231616Aug 23, 2010Jul 31, 2012Covidien AgTransformer for RF voltage sensing
US8241278Apr 29, 2011Aug 14, 2012Covidien AgLaparoscopic apparatus for performing electrosurgical procedures
US8257307Oct 12, 2009Sep 4, 2012Alcon Research, Ltd.Method of controlling a surgical system based on a load on the cutting tip of a handpiece
US8267928Mar 29, 2011Sep 18, 2012Covidien AgSystem and method for closed loop monitoring of monopolar electrosurgical apparatus
US8267929Dec 16, 2011Sep 18, 2012Covidien AgMethod and system for programming and controlling an electrosurgical generator system
US8287528Mar 28, 2008Oct 16, 2012Covidien AgVessel sealing system
US8291933Sep 25, 2008Oct 23, 2012Novartis AgSpring-less check valve for a handpiece
US8298223Apr 5, 2010Oct 30, 2012Covidien AgMethod and system for programming and controlling an electrosurgical generator system
US8303530May 10, 2007Nov 6, 2012Novartis AgMethod of operating an ultrasound handpiece
US8303580Apr 5, 2010Nov 6, 2012Covidien AgMethod and system for programming and controlling an electrosurgical generator system
US8308735Oct 6, 2008Nov 13, 2012Novartis AgPhacoemulsification tip with internal oriented structures
US8353297Aug 31, 2005Jan 15, 2013Novartis AgPulse manipulation for controlling a phacoemulsification surgical system
US8353905Jun 18, 2012Jan 15, 2013Covidien LpSystem and method for transmission of combined data stream
US8361054Dec 8, 2009Jan 29, 2013Cook Medical Technologies LlcApparatus and methods for containing and delivering therapeutic agents
US8403851Jan 22, 2010Mar 26, 2013Novartis AgMethod of controlling a surgical system based on a load on the cutting tip of a handpiece
US8403951Mar 8, 2005Mar 26, 2013Novartis AgPhacoemulsification tip
US8414605Jul 8, 2011Apr 9, 2013Alcon Research, Ltd.Vacuum level control of power for phacoemulsification hand piece
US8430838Jan 6, 2010Apr 30, 2013Novartis AgMethod of controlling a surgical system based on irrigation flow
US8465467Sep 14, 2006Jun 18, 2013Novartis AgMethod of controlling an irrigation/aspiration system
US8475447Aug 23, 2012Jul 2, 2013Covidien AgSystem and method for closed loop monitoring of monopolar electrosurgical apparatus
US8480661Mar 27, 2010Jul 9, 2013Carl Zeiss Meditec AgApparatus and method for removing a lenticle from the cornea
US8485993Jan 16, 2012Jul 16, 2013Covidien AgSwitched resonant ultrasonic power amplifier system
US8486061Aug 24, 2012Jul 16, 2013Covidien LpImaginary impedance process monitoring and intelligent shut-off
US8487487Jul 13, 2009Jul 16, 2013Ethicon Endo-Surgery, Inc.Magnetostrictive actuator of a medical ultrasound transducer assembly, and a medical ultrasound handpiece and a medical ultrasound system having such actuator
US8512332Sep 21, 2007Aug 20, 2013Covidien LpReal-time arc control in electrosurgical generators
US8523812Sep 3, 2010Sep 3, 2013Alcon Research, Ltd.Method of controlling a surgical system based on a rate of change of an operating parameter
US8523855Aug 23, 2010Sep 3, 2013Covidien AgCircuit for controlling arc energy from an electrosurgical generator
US8556890Dec 14, 2009Oct 15, 2013Covidien AgArc based adaptive control system for an electrosurgical unit
US8568422Aug 28, 2009Oct 29, 2013Nigel MorletCutting needle tip for surgical instrument
US8574228Jun 30, 2010Nov 5, 2013Olympus CorporationUltrasound treatment system
US8579929Sep 3, 2010Nov 12, 2013Alcon Research, Ltd.Torsional ultrasound hand piece that eliminates chatter
US8623040Jul 1, 2009Jan 7, 2014Alcon Research, Ltd.Phacoemulsification hook tip
US8631831Aug 12, 2009Jan 21, 2014Alcon Research, Ltd.Multi-compliant tubing
US8647340Jan 4, 2012Feb 11, 2014Covidien AgThermocouple measurement system
US8663214Jan 24, 2007Mar 4, 2014Covidien AgMethod and system for controlling an output of a radio-frequency medical generator having an impedance based control algorithm
US8672935Jun 30, 2010Mar 18, 2014Olympus CorporationUltrasound treatment system
US8685016Feb 23, 2009Apr 1, 2014Covidien AgSystem and method for tissue sealing
US8728032Jan 17, 2012May 20, 2014Cook Medical Technologies LlcSystems and methods for delivering therapeutic agents
US8734438Oct 21, 2005May 27, 2014Covidien AgCircuit and method for reducing stored energy in an electrosurgical generator
US8753334May 10, 2006Jun 17, 2014Covidien AgSystem and method for reducing leakage current in an electrosurgical generator
US8771301Sep 11, 2009Jul 8, 2014Alcon Research, Ltd.Ultrasonic handpiece
US8777941May 10, 2007Jul 15, 2014Covidien LpAdjustable impedance electrosurgical electrodes
US8784357Sep 15, 2010Jul 22, 2014Alcon Research, Ltd.Phacoemulsification hand piece with two independent transducers
US8790359May 18, 2007Jul 29, 2014Cybersonics, Inc.Medical systems and related methods
US8808161Oct 23, 2003Aug 19, 2014Covidien AgRedundant temperature monitoring in electrosurgical systems for safety mitigation
US8814894Sep 11, 2009Aug 26, 2014Novartis AgUltrasound handpiece
US20120083728 *Dec 14, 2011Apr 5, 2012Gary SorensenPhacoemulsification hand piece with integrated aspiration pump
US20120083773 *May 12, 2011Apr 5, 2012Foster William JSmall diameter fragmatome for minimally traumatic retained lens fragments removal
US20120302938 *Jun 4, 2012Nov 29, 2012University Of WashingtonDrainage systems for excess body fluids and associated methods
USRE30536 *May 1, 1978Mar 3, 1981Cavitron CorporationUltrasonic device and method
USRE40388May 8, 2003Jun 17, 2008Covidien AgElectrosurgical generator with adaptive power control
USRE43617Feb 13, 2008Aug 28, 2012Andrew Mark STissue liquefaction and aspiration
CN102740905BDec 3, 2010Jul 23, 2014爱尔康研究有限公司带有一体式抽吸泵的晶状体乳化机头
DE2605968A1 *Feb 14, 1976Sep 16, 1976Cavitron CorpVorrichtung fuer chirurgische zwecke
DE2741107A1 *Sep 13, 1977Mar 29, 1979Heldt Gert Dipl Ing DrVerfahren zum loesen von ineinandergefuegten bauteilen
DE10056114A1 *Nov 13, 2000May 29, 2002Wolfgang MalodobryNarbenfreie Entfernung von Tätowierungen
DE19932032A1 *Jul 9, 1999Feb 1, 2001Eppendorf Geraetebau NethelerVorrichtung zur Mikro-Dissektion von Gewebe
DE19932032C2 *Jul 9, 1999Jul 24, 2003Eppendorf AgVorrichtung zur Mikro-Dissektion von Gewebe
DE102009015911A1Apr 3, 2009Oct 7, 2010Carl Zeiss Meditec AgVorrichtung und Verfahren zur Entfernung eines Lentikels aus der Hornhaut
EP0139753A1 *Apr 4, 1983May 8, 1985Sumitomo Bakelite Company LimitedUltrasonic oscillator
EP0198703A2 *Apr 14, 1986Oct 22, 1986The University of Aberdeen, University CourtApparatus for removing biological material
EP0225690A1 *Sep 15, 1986Jun 16, 1987Site Microsurgical Systems, Inc.Aspiration fitting adaptor
EP0238667A1 *Jul 15, 1986Sep 30, 1987Sumitomo Bakelite Company LimitedUltrasonic instrument for surgical operations
EP0346496A1 *Dec 23, 1988Dec 20, 1989Sumitomo Bakelite Company LimitedExcreting apparatus
EP0566565A1 *Dec 14, 1990Oct 27, 1993Alcon Laboratories, Inc.Tissue scraper element for medical use
EP0962203A1May 3, 1999Dec 8, 1999Alcon Laboratories, Inc.A liquefaction handpiece
EP0962204A1May 3, 1999Dec 8, 1999Alcon Laboratories, Inc.Control system for a liquefaction handpiece
EP0962205A1May 3, 1999Dec 8, 1999Alcon Laboratories, Inc.Tip for a liquefaction handpiece
EP1062958A1Jun 13, 2000Dec 27, 2000Alcon Laboratories, Inc.A control system for controlling the operating parameters of a surgical system
EP1080739A2Jun 20, 2000Mar 7, 2001Alcon Universal, Ltd.Liquid venting surgical system and cassette
EP1199054A1Sep 28, 2001Apr 24, 2002Alcon Manufacturing Ltd.Liquefracture handpiece tip
EP1285642A1Aug 7, 2001Feb 26, 2003Alcon Manufacturing Ltd.Apparatus and software for controlling an intraoperative temperature
EP1314409A2Sep 28, 2001May 28, 2003Alcon Manufacturing Ltd.Liquefracture handpiece
EP1356833A1Mar 14, 2003Oct 29, 2003Alcon Inc.Liquid venting surgical cassette
EP1356834A2Mar 28, 2003Oct 29, 2003Alcon Inc.Surgical aspiration system
EP1647248A1Sep 5, 2005Apr 19, 2006Alcon, IncLow resistance irrigation system
EP1693027A1Feb 10, 2006Aug 23, 2006Alcon, IncPhacoemulsification tip
EP1700584A1Feb 20, 2006Sep 13, 2006Alcon, Inc.Phacoemulsification tip
EP1716828A1Mar 30, 2006Nov 2, 2006Alcon, Inc.Low resistance irrigation system and apparatus
EP1832259A1Aug 16, 2006Sep 12, 2007Alcon, IncPulse amplitude manipulation for controlling a phacoemulsification surgical system
EP1917936A1 *Aug 30, 2007May 7, 2008Alcon, Inc.Ultrasound apparatus and method of use
EP1990032A1May 9, 2008Nov 12, 2008Alcon, Inc.Method of operating an ultrasound handpiece
EP2065001A1Mar 21, 2005Jun 3, 2009Alcon, Inc.System for controlling a surgical system based on a rate of change of an operating parameter
EP2243449A1Jul 27, 2005Oct 27, 2010Alcon, Inc.Ultrasonic handpiece
WO1981001363A1 *Nov 21, 1980May 28, 1981R FrostCo-axial tube surgical infusion/suction cutter tip
WO1986002257A1 *Oct 18, 1985Apr 24, 1986Coopervision IncSurgical cutting instrument for ultrasonic eye surgery
WO1986006964A1 *Apr 22, 1986Dec 4, 1986Coopervision IncCassette for surgical irrigation and aspiration
WO1987001926A1 *Aug 27, 1986Apr 9, 1987Coopervision IncRigid, transparent fluid conduit for surgical irrigation
WO1987006116A1 *Apr 8, 1987Oct 22, 1987Cooper Lasersonics IncIrrigation/aspiration manifold and fittings for ultrasonic surgical aspiration system
WO1992010139A1 *Dec 14, 1990Jun 15, 1992Charles D KelmanTissue scraper element for medical use
WO1992016246A1 *Oct 31, 1991Oct 1, 1992Charles D KelmanApparatus, method for eye irrigation and aspiration
WO1992020310A1 *May 7, 1992Nov 26, 1992Ophthalmocare IncPhaco handpiece providing fingertip control of ultrasonic energy
WO1994008518A1 *Oct 8, 1993Apr 28, 1994Charles D KelmanCavitation-generating tip for disintegrating tissue
WO1996025883A1Feb 20, 1996Aug 29, 1996Colman Ross KraffExpansile surgical sleeve apparatus and method for using same
WO1997049343A1 *Jun 26, 1997Dec 31, 1997Joseph F Gravlee JrPhacoemulsification needle
WO1998007398A1Aug 22, 1997Feb 26, 1998Graham David BarrettIntraocular irrigation/aspiration device
WO1998025557A1Oct 29, 1997Jun 18, 1998Alcon Lab IncLiquefaction handpiece
WO1999018901A1Apr 7, 1998Apr 22, 1999Alcon Lab IncControl system for a phacoemulsification handpiece
WO1999058179A1Mar 25, 1999Nov 18, 1999Mackool Richard JAngulated phacoemulsification needle whose outer surface converges and inner channel narrows
WO2000074615A2Jun 1, 2000Dec 14, 2000Alcon Universal LtdPhaco-emulsification needle
WO2001030282A1Sep 12, 2000May 3, 2001Alcon Lab IncLiquefracture handpiece
WO2001030284A1Sep 18, 2000May 3, 2001Alcon Lab IncLiquefracture handpiece
WO2001030285A1Sep 18, 2000May 3, 2001Alcon Lab IncLiquefracture handpiece
WO2001037768A1Sep 19, 2000May 31, 2001Alcon Lab IncPumping chamber for a liquefracture handpiece
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Classifications
U.S. Classification604/22, 604/8, 604/27, 606/169, 606/128, 604/28
International ClassificationA61B17/32, A61M1/00, A61F9/007
Cooperative ClassificationA61B2017/320072, A61M1/0064, A61F9/00745, A61B2017/320084, A61B2017/320076, A61B17/320068
European ClassificationA61B17/32U, A61M1/00K4, A61F9/007R2
Legal Events
DateCodeEventDescription
Jul 21, 1989ASAssignment
Owner name: COOPER COMPANIES, INC., THE A CORP. OF DE
Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:IRVING TRUST COMPANY;REEL/FRAME:005153/0640
Owner name: COOPER COMPANIES, INC., THE, CALIFORNIA
Free format text: SECURITY INTEREST;ASSIGNOR:AIG CAPITAL CORP.;REEL/FRAME:005184/0092
Effective date: 19890201
Owner name: UNION BANK
Free format text: SECURITY INTEREST;ASSIGNOR:COOPER COMPANIES, INC., THE, A CORP. OF DE;REEL/FRAME:005224/0559
Effective date: 19890202
Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:IRVING TRUST COMPANY;REEL/FRAME:5153/640
Owner name: COOPER COMPANIES, INC., THE,CALIFORNIA
Mar 30, 1984AS02Assignment of assignor's interest
Owner name: COOPERVISION, INC., 2801 ORCHARD PKWY., SAN JOSE,
Effective date: 19840313
Owner name: NORTIVAC INC
Mar 30, 1984AS01Change of name
Owner name: CAITRON CORPORATION
Effective date: 19840227
Owner name: NORTIVAC INC
Mar 30, 1984ASAssignment
Owner name: COOPERVISION, INC., 2801 ORCHARD PKWY., SAN JOSE,
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:NORTIVAC INC;REEL/FRAME:004245/0389
Effective date: 19840313
Owner name: NORTIVAC INC
Free format text: CHANGE OF NAME;ASSIGNOR:CAITRON CORPORATION;REEL/FRAME:004245/0392
Effective date: 19840227