Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUSRE36795 E
Publication typeGrant
Application numberUS 08/724,997
Publication dateJul 25, 2000
Filing dateOct 3, 1996
Priority dateMar 15, 1994
Fee statusPaid
Also published asUS5352222
Publication number08724997, 724997, US RE36795 E, US RE36795E, US-E-RE36795, USRE36795 E, USRE36795E
InventorsMark A. Rydell
Original AssigneeEverest Medical Corporation
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Surgical scissors with bipolar coagulation feature
US RE36795 E
Abstract
A bipolar electrosurgical scissors for use in open or endoscopic surgery has a pair of opposed blade members pivotally joined to one another and to the distal end of the scissors itself by a rivet which extends through a insulated bushing member. Each of the blade members comprises a blade support and a blade itself, each fabricated from metal, such as stainless steel. The blades are affixed to their associated supports by means of a suitable adhesive or adhesive composite material such as a fiberglass reinforced epoxy exhibiting dielectric properties. Cutting is performed, steel-on-steel, without causing a short circuit between the two blade supports which themselves function as the bipolar electrodes.
Images(1)
Previous page
Next page
Claims(20)
What is claimed is:
1. A bipolar electrosurgical instrument for cutting and coagulating tissue comprising:
(a) first and second blade members .[.each.]..Iadd., at least one .Iaddend.comprising a laminated assembly of a metal blade defining a shearing surface, a metal blade support and an intermediate electrically insulative bonding/spacing layer for joining said blade to said blade support;
(b) means for pivotally joining said first and second blade members together with their respective shearing surfaces facing one another;
(c) means coupled to .[.at least.]. one of said first and second blade members for imparting a scissors-like movement relative to the other of said first and second blade members; and
(d) means for applying a voltage between the metal blade supports of said first and second blade members.
2. The bipolar electrosurgical instrument as in claim 1 wherein said shearing surfaces of said first and second blade members and said blade support are curved.
3. The bipolar electrosurgical instrument as in claim 2 wherein said intermediate, electrically insulating bonding/spacing layer is an epoxy material.
4. The bipolar electrosurgical instrument as in claim 3 wherein said epoxy material includes a fiberglass-mat of a predetermined thickness therein.
5. The bipolar electrosurgical instrument as in claim 3 wherein said epoxy material includes glass microspheres of a predetermined maximum diameter therein.
6. The bipolar electrosurgical instrument as in claim 3 wherein said metal is stainless steel.
7. A bipolar electrosurgical instrument for cutting and coagulating tissue comprising, in combination:
(a) an elongated tubular member having a proximal end, a distal end and a lumen extending therebetween;
(b) first and second blade members, .[.each.]. .Iadd.at least one .Iaddend.comprising a laminated assembly of a metal blade defining a shearing surface, a metal blade support and an intermediate electrically insulating spacing/bonding layer for joining said blade to said blade support;
(c) means for pivotally joining said first and second blade members to the distal end of said elongated tubular member with their respective shearing surfaces facing one another;
(d) a handle affixed to said proximal end of said tubular member;
(e) means coupled to said handle and extending through said lumen for imparting a scissors-like movement to .[.at least.]. one of said first and second blade members relative to the other; and
(f) means extending through said lumen for applying a voltage between said blade supports of said first and second blade members.
8. The bipolar electrosurgical instrument as in claim 7 wherein said itnermediate electronically insulating bonding layer is an epoxy material.
9. The bipolar electrosurgical instrument as in claim 8 wherein said epoxy material includes a fiberglass-mat of a predetermined thickness therein.
10. The bipolar electrosurgical instrument as in claim 8 wherein said epoxy material includes glass microspheres of a predetermined maximum diameter therein.
11. The bipolar electrosurgical instrument as in claim 7 wherein said first and second blade members are curved. .Iadd.
12. A bipolar electrosurgical instrument for cutting and coagulating tissue comprising:
(a) first and second blade members each comprising a laminated assembly of a metal blade defining a shearing surface, a metal blade support and an intermediate electrically insulative bonding/spacing layer for joining said blade to said blade support;
(b) means for pivotally joining said first and second blade members together with their respective shearing surfaces facing one another;
(c) means coupled to at least one of said first and second blade members for imparting a scissor-like movement relative to the other of said first and second blade members; and
(d) means for applying a voltage between the metal blade supports of said first and second blade members..Iaddend..Iadd.13. A bipolar electrosurgical instrument for cutting and coagulating tissue comprising, in combination:
(a) an elongated tubular member having a proximal end, a distal end and a lumen extending therebetween;
(b) first and second blade members, each comprising a laminated assembly of a metal blade defining a shearing surface, a metal blade support and an intermediate electrically insulating spacing/bonding layer for joining said blade to said blade support;
(c) means for pivotally joining said first and second blade members to the distal end of said elongated tubular member with their respective shearing surfaces facing one another;
(d) a handle affixed to said proximal end of said tubular member;
(e) means coupled to said handle and extending through said lumen for imparting a scissor-like movement to at least one of said first and second blade members relative to the other; and
(f) means extending through said lumen for applying to a voltage between said blade supports of said first and second blade members..Iaddend..Iadd.14. A bipolar electrosurgical instrument for cutting and coagulating tissue, comprising:
(a) first and second blade members each having an inner shearing surface and a conductive portion, at least one of said blade members comprising a laminated assembly of an inner metal blade defining said inner shearing surface, an intermediate electrically insulative layer, and an outer metal conductive layer forming said conductive portion which is electrically insulated from said inner metal blade by said intermediate electrically insulative layer;
(b) means for pivotally joining said first and second blade members with their respective inner shearing surfaces facing one another;
(c) means coupled to at least one of said first and second blade members for imparting a scissors-like movement relative to the other of said first and second blade members; and
(d) means for applying a voltage between said conductive portions of said
first and second blade members..Iaddend..Iadd.15. An endoscopic scissors blade for use in a bipolar endoscopic instrument, said blade comprising:
(a) an inner metal shearing surface;
(b) an intermediate electrically insulative layer;
(c) an outer metal conductive layer which is electrically insulated from said inner metal shearing surface by said intermediate electrically insulative layer; and
(d) means for coupling a source of voltage to said outer metal conductive layer..Iaddend..Iadd.16. An endoscopic scissors blade according to claim 15, further comprising:
(e) means for pivotally mounting said scissors blade; and
(f) means for coupling said scissors blade to a means for imparting a
pivotal movement to said scissors blade..Iaddend..Iadd.17. An endoscopic scissors blade according to claim 15, wherein:
said intermediate electrically insulative layer is a fiberglass blade support and said inner metal shearing surface and said outer metal conductive layer are laminated layers on said fiberglass blade
support..Iaddend..Iadd.18. A bipolar electrosurgical scissors comprising:
(a) a pair of blades, at least one blade of the pair having
(i) an inner metal shearing surface;
(ii) an intermediate electrically insulative layer;
(iii) an outer metal conductive layer which is electrically insulated from said inner metal shearing surface by said intermediate electrically insulative layer; and
(b) means for coupling a source of voltage to said outer metal conductive layer..Iaddend..Iadd.19. A bipolar electrosurgical scissors according to claim 18, further comprising:
(e) means for pivotally mounting said pair of blades; and
(f) means for coupling one of said scissors blade to a means for imparting a pivotal movement to said scissors blade..Iaddend..Iadd.20. A bipolar electrosurgical scissors according to claim 18, wherein:
said intermediate electrically insulative layer is a fiberglass blade support and said inner metal shearing surface and said outer metal conductive layer are laminated layers on said fiberglass blade support..Iaddend..Iadd.21. A bipolar electrosurgical instrument for cutting and coagulating tissue, comprising:
(a) first and second blade members each comprising a laminated assembly of a metal blade defining a shearing surface, an intermediate electrically insulative layer, and a metal blade support which is electrically insulated from said metal blade by said intermediate electrically insulative layer;
(b) means for pivotally joining said first and second blade members together with their respective shearing surfaces facing one another;
(c) means coupled to at least one of said first and second blade members for imparting a scissor-like movement relative to the others of said first and second blade members; and
(d) means for applying a voltage between the metal blade supports of said first and second blade members..Iaddend..Iadd.22. A bipolar electrosurgical instrument according to claim 21, wherein:
said shearing surfaces of said first and second blade members and said blade support are curved..Iaddend..Iadd.23. A bipolar electrosurgical instrument according to claim 22, wherein:
said metal is stainless steel..Iaddend..Iadd.24. A bipolar electrosurgical instrument for cutting and coagulating tissue, comprising, in combination:
(a) an elongated tubular member having a proximal end, a distal end, and a lumen extending therebetween;
(b) first and second blade members, each comprising a laminated assembly of a metal blade defining an inner shearing surface, an intermediate electrically insulative layer, and a metal blade support which is electrically insulated from said metal blade by said intermediate electrically insulative layer;
(c) means for pivotally joining said first and second blade members together with their respective shearing surfaces facing one another;
(d) a handle affixed to said proximal end of said tubular member;
(e) means coupled to said handle and extending through said lumen for imparting a scissor-like movement to at least one of said first and second blade members relative to the other; and
(f) means extending through said lumen for applying a voltage between said blade supports of said first and second blade members..Iaddend..Iadd.25. A bipolar electrosurgical instrument according to claim 24 wherein:
said inner shearing surfaces of said first and second blade members are
curved..Iaddend..Iadd.26. A bipolar electrosurgical instrument according to claim 24, wherein:
said metal is stainless steel..Iaddend..Iadd.27. A bipolar electrosurgical instrument for cutting and coagulating tissue, comprising, in combination:
(a) an elongated tubular member having a proximal end, a distal end, and a lumen extending therebetween;
(b) first and second blade members each having an inner shearing surface and a conductive portion, at least one of said blade members comprising a laminated assembly of an inner metal blade defining said inner shearing surface, an intermediate electrically insulative layer, and an outer metal conductive layer forming said conductive portion which is electrically insulated from said inner metal blade by said intermediate electrically insulative layer;
(c) means for pivotally joining said first and second blade members with their respective inner shearing surfaces facing one another;
(d) a handle affixed to said proximal end of said tubular member;
(e) means coupled to said handle and extending through said lumen for imparting a scissor-like movement to at least one of said first and second blade members relative to the other; and
(f) means extending through said lumen for applying a voltage between said conductive portions of said first and second blade
members..Iaddend..Iadd. 8. A bipolar electrosurgical instrument according to claim 27, wherein:
each of said first and second blade members comprises a laminated assembly of an inner metal blade defining said inner shearing surface, an intermediate electrically insulative layer, and an outer metal conductive layer forming said conductive portion which is electrically insulated from said inner metal blade by said intermediate electrically insulative layer..Iaddend..Iadd.29. A bipolar electrosurgical scissors comprising:
(a) first and second blade members each comprising an assembly of a metal shearing surface, an electrically conductive electrode, and an intermediate electrically insulative material disposed between and fixed to the metal shearing surface and the electrically conductive electrode;
(b) means coupled to at least one of said first and second blade members for imparting scissor-like movement relative to the other of said first and second blade members; and
(c) means for applying a voltage between the electrically conductive electrodes of said first and second blade members..Iaddend..Iadd.30. A bipolar electrosurgical scissors according to claim 29, wherein:
said metal shearing surfaces of said first and second blade members are curved..Iaddend..Iadd.31. A bipolar electrosurgical scissors according to claim 30, wherein:
said intermediate, electrically insulative material is an epoxy material..Iaddend..Iadd.32. A bipolar electrosurgical scissors according to claim 31, wherein:
said epoxy material includes a fiberglass-mat of a predetermined thickness therein..Iaddend..Iadd.33. A bipolar electrosurgical scissors according to claim 31 wherein:
at least one of said metal shearing surface and said electrically
conductive electrode is made of stainless steel..Iaddend..Iadd.34. A bipolar electrosurgical scissors comprising:
(a) first and second blade members each comprising an assembly of a metal shearing surface, an electrically conductive electrode, and an intermediate electrically insulative layer disposed between and affixed to the metal shearing surface and the electrically conductive electrode, at least one of said first and second blade members having a pivot hole for mounting it relative to the other of said first and second blade members to allow a scissor-like movement of said at least one of said first and second blade members relative to the other of said first and second blade members;
(b) a reciprocating member coupled to said at least one of said first and second blade members and importing scissor-like movement to said at least one of said first and second blade members relative to the other of said first and second blade members; and
(c) first and second electrically conductive members coupled to respective electrically conductive electrodes and applying a voltage between the electrically conductive electrodes of said first and second blade members..Iaddend..Iadd.35. A bipolar electrosurgical scissors according to claim 34, wherein:
said metal shearing surfaces of said first and second blade members are
curved..Iaddend..Iadd.36. A bipolar electrosurgical scissors according to claim 35, wherein:
said intermediate, electrically insulative layer is an epoxy material layer..Iaddend..Iadd.37. A bipolar electrosurgical scissors according to claim 36, wherein:
said epoxy material includes a fiberglass-mat of a predetermined thickness therein..Iaddend..Iadd.38. A bipolar electrosurgical scissors according to claim 36, wherein:
at least one of said metal shearing surface and said electrically conductive electrode is made of stainless steel..Iaddend.
Description
BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates generally to the design of a bipolar electrosurgical scissors, and more particularly to a surgical scissors incorporating bipolar electrodes as its blade elements, such that mechanical cutting with subsequent electrocoagulation can be achieved without requiring an instrument exchange.

2. Discussion of the Prior Art

Electrocoagulating instruments include at least one conductive electrode. Radio frequency energy is conducted through this electrode to either a remote conductive body-plate (monopolar) or to a second, closely-spaced conductive electrode (bipolar). Current passing through the gap between the two electrodes will coagulate blood and other body fluids placed between them.

Monopolar electrocautery instruments suffer from the fact that the return path between the active-electrode and the large area body-plate can be unpredictable as the electrical current seeks the return electrode through the path of least resistance. With bipolar electrosurgical instruments, however, because the two electrodes are closely spaced to one another, usually at the distal end of an instrument handle, the return path is very short and only involves the tissue and fluids in the short path between the electrodes.

There is available in the prior art a scissors-type instrument for mechanically snipping tissue during the course of an endoscopic procedure. Such a scissors comprises of pair of blades fabricated from metal and disposed at the distal end of an elongated tubular member whose outside diameter is sufficiently small to allow it to be passed through the working lumen of an endoscope, a laparoscope or other similar devices known in the art. Disposed at the proximal end of the rigid tube is a scissors-type handle having a pair of members, each with a finger-receiving loop therein which are pivotally coupled to one another. An appropriate linkage is made between the handle members and the blades so that manipulation of the handle members will result in an opening and closing of the blades relative to one another. When using a mechanical cutting scissors of this type to excise tissue, when a blood vessel is cut, bleeding results. At that point, it is generally necessary for the surgeon to remove the scissors instrument from the working lumen of the endoscope and then insert an electrocoagulator down the endoscope to the site of the bleeder. This instrument exchange is time-consuming and in a surgical procedure where moments count, it would be desirable to have a scissors-type instrument for cutting but which also incorporates the ability to coagulate blood and other body tissue using RF energy.

There is also available in the prior art monopolar scissors where both of the scissors blades form one pole and with a remote body plate being the second pole. To date, however, there is not available in the marketplace a bipolar electrosurgical scissors where its two blades are electrically isolated from one another and comprise the bipolar electrode pair. With metal-to-metal contact along the sharpened edges of the two blades, an electrical short results. Furthermore, the attempt to use a rivet or screw as the pivot point for the blades is another area where short-circuiting is likely to occur. When such a short exists, the electrical current does not flow through the blood or body tissue to effect coagulation, but instead, follows the short-circuit path from one electrode to the other.

In a copending application, Ser. No. 07/887,212, filed May 26, 1992, there is described a bipolar scissors for insertion into a laparoscope, trocar or endoscope for effecting electrocoagulation of blood and tissue during laparoscopic or other endoscopic surgery. The scissors blades at the distal tip of the instrument perform cutting of the tissue by mechanical shearing action. The two blades are effectively insulated from one another, allowing them to function as bipolar electrodes for electrocoagulating small blood vessels in the surgical field.

The instrument of the aforereferenced application includes a scissors-type handle having first and second pivoting members, each with a finger-receiving loop on one end of each and extending from the opposite end of one is an elongated, rigid tubular member of a size capable of being inserted through the trocar or endoscope. Affixed to the distal end of the rigid tubular member is a first blade composite which comprises a metal blank having a suitable ceramic layer bonded to one major surface thereof, the ceramic being honed to define a sharp cutting edge. Pivotally joined to the first blade by an insulating pivot member is a second blade composite, also having a metal blank with a ceramic substrate bonded to one major surface thereof. When the two blade blanks are pivotally joined together, the ceramic layers are in face-to-face relationship and because the cutting edges thereof are honed, the blades are capable of cutting tissue when made to move in a scissors-like manner with tissue placed between the cutting edges thereof.

Extending through the lumen of the elongated tubular member is a wire or rod which is rigid in the longitudinal direction and which is coupled at its proximal end to one of the handle members and at its other end to one of the scissors blades. By appropriately manipulating the handle members, a snipping action of the blades results.

The instrument further includes means for applying a RF voltage across the gap between the two metal blade blanks which are maintained separated from one another by the ceramic faces bonded to these blanks. As such, the blades of the instrument itself can be used as a bipolar electrocoagulation device, obviating the need for doing an instrument exchange when it is necessary to coagulate blood and tissue following the mechanical cutting thereof.

In copending application Ser. No. 08/092,076, filed Jul. 16, 1993, there is described a bipolar electrosurgical scissors having curved blades in the embodiments of each of the aforereferenced applications, the bipolar blades are constructed by appropriately adhering a specially ground ceramic insulating member defining the sheering surface and cutting edge of the scissors to metal electrodes where it is the ceramic surfaces that interact with one another to perform the cutting function as the blades are opened and closed relative to one another. While that arrangement works well in implementing a bipolar electrosurgical scissors, the cost of manufacture is relatively high because of the difficulty in working with ceramics, especially when constructing electrosurgical scissors having arcuate blades. Those skilled in the art appreciate that ceramic will readily fracture when subjected to bending forces and, hence, it is necessary to produce the requisite ceramic elements for the scissors in a series of grinding operations.

A need therefore exists for a bipolar electrosurgical scissors for use in both open and endoscopic surgical procedures where the shearing surfaces may be surgical steel, but where the blades can also be used in performing bipolar electrocoagulation as the cutting progresses.

SUMMARY OF THE INVENTION

It is accordingly a principal object of the present invention to provide a bipolar, electrocoagulating instrument having metal scissors blades for the mechanical cutting of tissue.

Another object of the present invention is to provide a pair of bipolar scissors having a miniaturized distal blade configuration that allows the instrument to be inserted through a laparoscope, trocar or the working lumen of an endoscope.

Still another object of the present invention is to provide a bipolar-type scissors instrument having metal (stainless steel) cutting surfaces and which utilizes a push rod and pivot combination to cause movement of the scissors blade through manipulation of a scissors-style handle mechanism at the proximal end of the instrument and wherein blade supports for the scissors may be simultaneously energized from a RF source to effect the electrocoagulation of cut tissue.

The foregoing object of the invention is achieved by providing an instrument having a metal blade member with a sheering surface and a honed cutting edge. The blade member is affixed to a metal blade support by an electrically insulating bonding layer which is disposed intermediate the blade member and the blade support. In forming an endoscopic scissors, this blade assembly is pivotally secured to the distal end of an elongated tube. An actuating link extends through the tube to a movable portion of a scissors handle so that when the handle is manipulated, the blades can be made to open and close relative to one another in scissors-like fashion. Also extending through the lumen from electrical terminals on the handle to the metal blade supports are conductors which permit a voltage to be applied between the two blade supports. Because the blade having the sharpened edge and shearing surface is insulated from its blade support, there will be no short circuit between the blade members due to the fact that the conductive shearing surfaces come into contact with one another along their length as the blades are closed on an object to be cut.

It has been found convenient in the manufacture of the scissors of the present invention to employ a partially cured epoxy, an epoxy impregnated fiberglass mat or a slurry of glass beads and epoxy as the bonding layer for joining the blades to their respective supports while maintaining a desired spacing therebetween. The partially cured epoxy can be die-cut to size so as to conform in shape to the interface between the blade support and the blade member. When the laminated structure is clamped together and then subjected to a heating operation, the epoxy spacer layer fully cures and creates a strong bond between the blade and its blade support, while still maintaining electrical isolation therebetween.

DESCRIPTION OF THE DRAWINGS

The foregoing features, objects and advantages of the invention will become apparent to those skilled in the art from the following detailed description of a preferred embodiment, especially when considered in conjunction with the accompanying drawings in which like numerals in the several views refer to corresponding parts.

FIG. 1 is a perspective view of an endoscopic electrosurgical scissors constructed in accordance with the present invention; and

FIG. 2 is a greatly enlarged top view of the distal end portion of the scissors of FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIG. 1, there is indicated generally by numeral 10 a bipolar electrosurgical scissors for endoscopic surgery constructed in accordance with the present invention. It is seen to include an elongated tubular barrel 12 having a proximal end 14, a distal end 16 and with a lumen extending therebetween. The O.D. of the barrel is sufficiently small to be passed through the working lumen of an endoscope (laparoscope). Affixed to the proximal end 14 of the bipolar scissors 10 is a rotatable knob 18 appropriately mounted in the stationary portion 20 of a scissors handle assembly 22 so that the knob 18 can be rotated, the barrel 12 turning with it. Those desiring further details on the construction and internal workings of the handle assembly 22 are referred to applicant's earlier patent application Ser. No. 08/013,852, filed Feb. 5, 1993. That application describes in detail how manipulation of the scissors handle 22 causes blades 24 and 26 connected to the distal end 16 of the tube 12 to move in scissors-like action relative to one another. Because the novel features of the present invention center on the construction of the blades 24 and 26, there is no need to further describe the details of the handle construction.

Referring to FIG. 2, there is shown a greatly enlarged top plan view of the distal end portion of the scissors viewed along the line 2--2 in FIG. 1. Blade 24 is seen to comprise a conductive metal blade support 28, preferably fabricated from stainless steel. While the blade support 28 is illustrated as having an arcuate profile when observed from the top as in FIG. 2, it can just as well be straight. Attached to the blade support by means of a dielectric bonding agent 30 is a metal blade 32 having an arcuate shearing surface 34 and a honed cutting edge.

In adhering the cutting blade 34 to the blade support 28, it has been found convenient to employ a suitable epoxy, such as AF 125 sold by the 3M Company because of its desired dielectric characteristics. The epoxy bonding/spacing layer 30 may be obtained in a partially cured state so that it is rigid enough to hold its own shape, but can easily be die-cut to a desired size and shape characteristic. The partially cured epoxy layer is then applied against the concave surface of the blade support 28 and because in the partially cured state, the material is tacky, it will adhere to it. Next, the blade 34, itself, is pressed against the other side of the partially cured epoxy bonding layer 30 and when appropriately aligned, a suitable clamp is used to hold the assembly together. The assembly may then be placed in an oven or otherwise heated to the point where the epoxy layer becomes fully cured and hard. When the assembly is removed from the oven and the clamp is removed, it is found that a very strong bond holds the blade 34 to the support 28. The two are electrically insulated from one another, however, by the epoxy bonding layer.

To ensure that clamping and heating does not alter the width of the insulating gap, a fiberglass mat of the desired thickness can be impregnated with a B-stage type epoxy or glass beads of a diameter corresponding to the desired gap width can be mixed with the B-stage epoxy before it is interposed between the blade and its support and prior to the clamping and heat curing thereof.

The other scissors blade 26 is manufactured in much the same fashion. It includes a blade support 36 and a blade member 38 bonded together by a dielectric bonding/spacing layer 40. The dielectric bonding/spacing layer is again preferably an epoxy or a glass-filled epoxy material adhered to the convex surface of the blade support 36.

The proximal end portions 42 and 44 of the blade supports 28 and 36 each have a circular aperture extending therethrough as at 46 and fitted into each of the apertures is an insulating bushing half 48-50 allowing a steel rivet 52 to pivotally secure the blades 24 and 26 to an insulating hub 54 without creating an electrical short circuit between the blade supports 28 and 36. The hub member 54 fits within the distal end 16 of the tubular barrel 12 and is appropriately bonded or swagged so as not to come loose.

The mechanism for actuating the blades 24 and 26 in a scissors-like motion is similar to that described in applicant's earlier copending application Ser. No. 08/013,852, which is herein incorporated by reference. In that arrangement, first and second conductive rods 56 and 58 extend through the lumen of the barrel 12 from the scissors handle members to a pair of conductive links 60 and 62. The links are pivotally secured to the distal ends of the rods 58 and 60 and to the blade halves 24 and 26 by means of conductive metal rivets 64 and 66. The rivets 64 and 66 pass through apertures formed in the distal end portions of the blade halves 24 and 26 at locations that are off of center so that a lever arm is created for moving the blades as the conductive rods 56 and 58 are reciprocally, longitudinally displaced by actuation of the scissors handle 22. A slip-ring connection is provided in the handle portion 20 for allowing conductors in the insulated electrical cord 68 (FIG. 1) to join to the conductive rods 56 and 58 while still permitting the barrel 12 to be rotated upon turning the knob 18 and without twisting the conductors in lead 68. In this fashion, a predetermined RF voltage may be applied across the blade supports 28 and 36 by way of the lead 68, the conductive rods 56 and 58, the links 60 and 62 and the rivets 64 and 66. Because of the insulating layers 30 and 40 used in bonding the sharpened blades 32 and 38 to the blade supports 28 and 36, those two blades can touch one another along their entire length as the cutting motion takes place without creating an electrical short circuit therebetween. When it is desired to cauterize tissue, the RF voltage is applied to the electrosurgical scissors, thereby making the blade supports the active bipolar electrodes. When the two blade supports are brought into contact with tissue, a current flows from the first blade support, through the tissue to the second blade support, thereby effecting cauterization.

The present invention obviates the need for providing a somewhat fragile ceramic layer to define the shearing surface and cutting edges of the blades. The stainless steel blade supports and the blades themselves can be readily bent to create a curved blade without the need for expensive grinding operations heretofore necessary in creating curved ceramic pieces.

The use of a partially cured epoxy dielectric adhesive in the early stages of fabrication for adhering the blade to its support and then later fully curing the epoxy layer also greatly simplifies the steps needed to manufacture an electrosurgical scissors having bipolar electrodes.

This invention has been described herein in considerable detail in order to comply with the Patent Statutes and to provide those skilled in the art with the information needed to apply the novel principles and to construct and use such specialized components as are required. However, it is to be understood that the invention can be carried out by specifically different equipment and devices, and that various modifications, both as to the equipment details and operating procedures, can be accomplished without departing from the scope of the invention itself. For example, while an endoscopic scissors has been used in explaining the invention, it is equally applicable to a scissors designed for open surgery. Hence, the scope of the invention is to be determined from the appended claims.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2031682 *Nov 18, 1932Feb 25, 1936Wappler Frederick CharlesMethod and means for electrosurgical severance of adhesions
US3920021 *May 15, 1974Nov 18, 1975Siegfried HiltebrandtCoagulating devices
US4016881 *May 27, 1975Apr 12, 1977Centre De Recherche Industrielle Du QuebecInstrument for use in laparoscopic tubal cauterization
US4128099 *Sep 20, 1977Dec 5, 1978Richard Wolf GmbhSingle-pole coagulation forceps
US4347842 *Feb 15, 1980Sep 7, 1982Mark BealeDisposable electrical surgical suction tube and instrument
US4644651 *Nov 18, 1985Feb 24, 1987Jacobsen Research Corp.Instrument for gripping or cutting
US4819633 *Jul 29, 1987Apr 11, 1989Richard Wolf GmbhCoagulation forceps
US4862890 *Feb 29, 1988Sep 5, 1989Everest Medical CorporationElectrosurgical spatula blade with ceramic substrate
US4953559 *Nov 14, 1988Sep 4, 1990Consiglio Nazionale Delle RicercheCatheter for endocardial biopsy, which can also be used for identifying the point of origin of ventricular arrhythmia
US5015227 *Apr 3, 1990May 14, 1991Valleylab Inc.Apparatus for providing enhanced tissue fragmentation and/or hemostasis
US5026370 *Jul 2, 1986Jun 25, 1991Lottick Edward AElectrocautery instrument
US5035248 *Apr 23, 1987Jul 30, 1991Zinnecker Hal PPolyolefin sheath and silicone O-ring for medical instrument
US5082000 *Nov 29, 1990Jan 21, 1992Applied Medical Technology, Inc.Biopsy forceps with calde controlled jaws
US5085659 *Nov 21, 1990Feb 4, 1992Everest Medical CorporationBiopsy device with bipolar coagulation capability
US5133727 *May 10, 1990Jul 28, 1992Symbiosis CorporationRadial jaw biopsy forceps
US5147356 *Apr 16, 1991Sep 15, 1992Microsurge, Inc.Surgical instrument
US5147357 *Mar 18, 1991Sep 15, 1992Rose Anthony TMedical instrument
US5160343 *Sep 9, 1991Nov 3, 1992Dexide, Inc.Surgical instruments handle and forceps assembly
US5171256 *Apr 4, 1991Dec 15, 1992Symbiosis CorporationSingle acting disposable laparoscopic scissors
US5171311 *Sep 23, 1991Dec 15, 1992Everest Medical CorporationPercutaneous laparoscopic cholecystectomy instrument
US5174300 *Feb 7, 1992Dec 29, 1992Symbiosis CorporationEndoscopic surgical instruments having rotatable end effectors
US5176677 *Nov 17, 1989Jan 5, 1993Sonokinetics GroupEndoscopic ultrasonic rotary electro-cauterizing aspirator
US5197963 *Dec 2, 1991Mar 30, 1993Everest Medical CorporationElectrosurgical instrument with extendable sheath for irrigation and aspiration
US5197964 *Nov 12, 1991Mar 30, 1993Everest Medical CorporationBipolar instrument utilizing one stationary electrode and one movable electrode
US5207675 *Jul 15, 1991May 4, 1993Jerome CanadySurgical coagulation device
US5217458 *Apr 9, 1992Jun 8, 1993Everest Medical CorporationBipolar biopsy device utilizing a rotatable, single-hinged moving element
US5217460 *Mar 22, 1991Jun 8, 1993Knoepfler Dennis JMultiple purpose forceps
US5258006 *Aug 21, 1992Nov 2, 1993Everest Medical CorporationBipolar electrosurgical forceps
US5312434 *Dec 21, 1992May 17, 1994Lawrence CrainichMedical instrument
US5324289 *May 1, 1992Jun 28, 1994Hemostatic Surgery CorporationHemostatic bi-polar electrosurgical cutting apparatus and methods of use
US5330471 *May 1, 1992Jul 19, 1994Hemostatic Surgery CorporationBi-polar electrosurgical endoscopic instruments and methods of use
US5540685 *May 5, 1995Jul 30, 1996Everest Medical CorporationBipolar electrical scissors with metal cutting edges and shearing surfaces
US5743906 *Sep 12, 1996Apr 28, 1998Everest Medical CorporationEndoscopic bipolar biopsy forceps
US5766166 *Feb 21, 1996Jun 16, 1998Enable Medical CorporationBipolar Electrosurgical scissors
EP0517244A1 *Jun 5, 1992Dec 9, 1992Hemostatic Surgery CorporationHemostatic bi-polar electrosurgical cutting apparatus
EP0518230A1 *Jun 5, 1992Dec 16, 1992Hemostatic Surgery CorporationBi-polar electrosurgical endoscopic instruments
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6358268Mar 6, 2000Mar 19, 2002Robert B. HuntSurgical instrument
US6387094 *Jun 30, 2000May 14, 2002Karl Storz Gmbh & Co. KgMedical instrument for dissecting tissue
US6447511Feb 27, 1997Sep 10, 2002Symbiosis CorporationBipolar endoscopic surgical scissor blades and instrument incorporating the same
US6451018Jun 9, 2000Sep 17, 2002Sherwood Services AgLaparoscopic bipolar electrosurgical instrument
US6464704Jun 20, 2001Oct 15, 2002Sherwood Services AgBipolar electrosurgical instrument with replaceable electrodes
US6506208Oct 9, 2001Jan 14, 2003Robert B. HuntSurgical instrument
US6511480Oct 22, 1999Jan 28, 2003Sherwood Services AgOpen vessel sealing forceps with disposable electrodes
US6682528Sep 17, 2002Jan 27, 2004Sherwood Services AgEndoscopic bipolar electrosurgical forceps
US6726686Apr 1, 2002Apr 27, 2004Sherwood Services AgBipolar electrosurgical instrument for sealing vessels
US6932810 *Nov 14, 2001Aug 23, 2005Sherwood Services AgApparatus and method for sealing and cutting tissue
US7063697Jul 25, 2003Jun 20, 2006Symbiosis CorporationBipolar endoscopic surgical scissor blades and instrument incorporating the same
US7655007Feb 2, 2010Covidien AgMethod of fusing biomaterials with radiofrequency energy
US7686804Mar 30, 2010Covidien AgVessel sealer and divider with rotating sealer and cutter
US7686827Oct 21, 2005Mar 30, 2010Covidien AgMagnetic closure mechanism for hemostat
US7708735Jul 19, 2005May 4, 2010Covidien AgIncorporating rapid cooling in tissue fusion heating processes
US7744615Jun 29, 2010Covidien AgApparatus and method for transecting tissue on a bipolar vessel sealing instrument
US7753909Apr 29, 2004Jul 13, 2010Covidien AgElectrosurgical instrument which reduces thermal damage to adjacent tissue
US7766910Aug 3, 2010Tyco Healthcare Group LpVessel sealer and divider for large tissue structures
US7771425Feb 6, 2006Aug 10, 2010Covidien AgVessel sealer and divider having a variable jaw clamping mechanism
US7776036Mar 13, 2003Aug 17, 2010Covidien AgBipolar concentric electrode assembly for soft tissue fusion
US7776037Aug 17, 2010Covidien AgSystem and method for controlling electrode gap during tissue sealing
US7789878Sep 7, 2010Covidien AgIn-line vessel sealer and divider
US7799026Sep 21, 2010Covidien AgCompressible jaw configuration with bipolar RF output electrodes for soft tissue fusion
US7799028Sep 26, 2008Sep 21, 2010Covidien AgArticulating bipolar electrosurgical instrument
US7811283Oct 8, 2004Oct 12, 2010Covidien AgOpen vessel sealing instrument with hourglass cutting mechanism and over-ratchet safety
US7819872Sep 29, 2006Oct 26, 2010Covidien AgFlexible endoscopic catheter with ligasure
US7828798Nov 9, 2010Covidien AgLaparoscopic bipolar electrosurgical instrument
US7837685Jul 13, 2005Nov 23, 2010Covidien AgSwitch mechanisms for safe activation of energy on an electrosurgical instrument
US7846158Dec 7, 2010Covidien AgApparatus and method for electrode thermosurgery
US7846161Dec 7, 2010Covidien AgInsulating boot for electrosurgical forceps
US7857812Dec 18, 2006Dec 28, 2010Covidien AgVessel sealer and divider having elongated knife stroke and safety for cutting mechanism
US7877852Feb 1, 2011Tyco Healthcare Group LpMethod of manufacturing an end effector assembly for sealing tissue
US7877853Sep 19, 2008Feb 1, 2011Tyco Healthcare Group LpMethod of manufacturing end effector assembly for sealing tissue
US7879035Feb 1, 2011Covidien AgInsulating boot for electrosurgical forceps
US7887535Feb 15, 2011Covidien AgVessel sealing wave jaw
US7887536Aug 19, 2009Feb 15, 2011Covidien AgVessel sealing instrument
US7896878Mar 12, 2009Mar 1, 2011Coviden AgVessel sealing instrument
US7909823Jan 17, 2006Mar 22, 2011Covidien AgOpen vessel sealing instrument
US7922718Oct 12, 2006Apr 12, 2011Covidien AgOpen vessel sealing instrument with cutting mechanism
US7922953Apr 12, 2011Covidien AgMethod for manufacturing an end effector assembly
US7931649Apr 26, 2011Tyco Healthcare Group LpVessel sealing instrument with electrical cutting mechanism
US7935052Feb 14, 2007May 3, 2011Covidien AgForceps with spring loaded end effector assembly
US7947041May 24, 2011Covidien AgVessel sealing instrument
US7951149May 31, 2011Tyco Healthcare Group LpAblative material for use with tissue treatment device
US7951150May 31, 2011Covidien AgVessel sealer and divider with rotating sealer and cutter
US7951165May 31, 2011Boston Scientific Scimed, Inc.Endoscopic medical instrument and related methods of use
US7955332Jun 7, 2011Covidien AgMechanism for dividing tissue in a hemostat-style instrument
US7963965Jun 21, 2011Covidien AgBipolar electrosurgical instrument for sealing vessels
US8016827Oct 9, 2008Sep 13, 2011Tyco Healthcare Group LpApparatus, system, and method for performing an electrosurgical procedure
US8034052Nov 1, 2010Oct 11, 2011Covidien AgApparatus and method for electrode thermosurgery
US8070746Dec 6, 2011Tyco Healthcare Group LpRadiofrequency fusion of cardiac tissue
US8114107Apr 16, 2007Feb 14, 2012Applied Medical Resources CorporationLaparoscopic scissor blades
US8123743Jul 29, 2008Feb 28, 2012Covidien AgMechanism for dividing tissue in a hemostat-style instrument
US8128624May 30, 2006Mar 6, 2012Covidien AgElectrosurgical instrument that directs energy delivery and protects adjacent tissue
US8142473Mar 27, 2012Tyco Healthcare Group LpMethod of transferring rotational motion in an articulating surgical instrument
US8147489Feb 17, 2011Apr 3, 2012Covidien AgOpen vessel sealing instrument
US8162973Aug 15, 2008Apr 24, 2012Tyco Healthcare Group LpMethod of transferring pressure in an articulating surgical instrument
US8192433Aug 21, 2007Jun 5, 2012Covidien AgVessel sealing instrument with electrical cutting mechanism
US8197479Dec 10, 2008Jun 12, 2012Tyco Healthcare Group LpVessel sealer and divider
US8197633Mar 15, 2011Jun 12, 2012Covidien AgMethod for manufacturing an end effector assembly
US8211105May 7, 2007Jul 3, 2012Covidien AgElectrosurgical instrument which reduces collateral damage to adjacent tissue
US8221416Jul 17, 2012Tyco Healthcare Group LpInsulating boot for electrosurgical forceps with thermoplastic clevis
US8235992Aug 7, 2012Tyco Healthcare Group LpInsulating boot with mechanical reinforcement for electrosurgical forceps
US8235993Sep 24, 2008Aug 7, 2012Tyco Healthcare Group LpInsulating boot for electrosurgical forceps with exohinged structure
US8236025Aug 7, 2012Tyco Healthcare Group LpSilicone insulated electrosurgical forceps
US8241282Sep 5, 2008Aug 14, 2012Tyco Healthcare Group LpVessel sealing cutting assemblies
US8241283Sep 17, 2008Aug 14, 2012Tyco Healthcare Group LpDual durometer insulating boot for electrosurgical forceps
US8241284Aug 14, 2012Covidien AgVessel sealer and divider with non-conductive stop members
US8251996Sep 23, 2008Aug 28, 2012Tyco Healthcare Group LpInsulating sheath for electrosurgical forceps
US8257352Sep 4, 2012Covidien AgBipolar forceps having monopolar extension
US8257387Aug 15, 2008Sep 4, 2012Tyco Healthcare Group LpMethod of transferring pressure in an articulating surgical instrument
US8267935Apr 4, 2007Sep 18, 2012Tyco Healthcare Group LpElectrosurgical instrument reducing current densities at an insulator conductor junction
US8267936Sep 18, 2012Tyco Healthcare Group LpInsulating mechanically-interfaced adhesive for electrosurgical forceps
US8277447Nov 18, 2009Oct 2, 2012Covidien AgSingle action tissue sealer
US8277475May 11, 2009Oct 2, 2012Applied Medical Resources CorporationLaparoscopic scissors
US8298228Sep 16, 2008Oct 30, 2012Coviden AgElectrosurgical instrument which reduces collateral damage to adjacent tissue
US8298232Oct 30, 2012Tyco Healthcare Group LpEndoscopic vessel sealer and divider for large tissue structures
US8303582Nov 6, 2012Tyco Healthcare Group LpElectrosurgical instrument having a coated electrode utilizing an atomic layer deposition technique
US8303586Nov 6, 2012Covidien AgSpring loaded reciprocating tissue cutting mechanism in a forceps-style electrosurgical instrument
US8317726Nov 27, 2012Boston Scientific Scimed, Inc.Biopsy forceps assemblies
US8317787Aug 28, 2008Nov 27, 2012Covidien LpTissue fusion jaw angle improvement
US8333765Dec 18, 2012Covidien AgVessel sealing instrument with electrical cutting mechanism
US8348948Jul 29, 2010Jan 8, 2013Covidien AgVessel sealing system using capacitive RF dielectric heating
US8361071Aug 28, 2008Jan 29, 2013Covidien AgVessel sealing forceps with disposable electrodes
US8361072Nov 19, 2010Jan 29, 2013Covidien AgInsulating boot for electrosurgical forceps
US8366709Dec 27, 2011Feb 5, 2013Covidien AgArticulating bipolar electrosurgical instrument
US8382754Feb 26, 2013Covidien AgElectrosurgical forceps with slow closure sealing plates and method of sealing tissue
US8394095Jan 12, 2011Mar 12, 2013Covidien AgInsulating boot for electrosurgical forceps
US8394096Mar 12, 2013Covidien AgOpen vessel sealing instrument with cutting mechanism
US8409197Apr 2, 2013Boston Scientific Miami CorporationMethods of cutting tissue using a medical instrument
US8425504Apr 23, 2013Covidien LpRadiofrequency fusion of cardiac tissue
US8454602Jun 4, 2013Covidien LpApparatus, system, and method for performing an electrosurgical procedure
US8469956Jul 21, 2008Jun 25, 2013Covidien LpVariable resistor jaw
US8469957Oct 7, 2008Jun 25, 2013Covidien LpApparatus, system, and method for performing an electrosurgical procedure
US8469993Feb 17, 2004Jun 25, 2013Boston Scientific Scimed, Inc.Endoscopic instruments
US8486107Oct 20, 2008Jul 16, 2013Covidien LpMethod of sealing tissue using radiofrequency energy
US8496656Jan 16, 2009Jul 30, 2013Covidien AgTissue sealer with non-conductive variable stop members and method of sealing tissue
US8518070Sep 13, 2012Aug 27, 2013Applied Medical Resources CorporationLaparoscopic scissors
US8523893Sep 30, 2011Sep 3, 2013Applied Medical Resources CorporationLaparoscopic scissors
US8523898Aug 10, 2012Sep 3, 2013Covidien LpEndoscopic electrosurgical jaws with offset knife
US8535312Sep 25, 2008Sep 17, 2013Covidien LpApparatus, system and method for performing an electrosurgical procedure
US8540711Jul 11, 2007Sep 24, 2013Covidien AgVessel sealer and divider
US8551088Apr 1, 2009Oct 8, 2013Applied Medical Resources CorporationElectrosurgical system
US8551091Mar 30, 2011Oct 8, 2013Covidien AgVessel sealing instrument with electrical cutting mechanism
US8562598Apr 1, 2009Oct 22, 2013Applied Medical Resources CorporationElectrosurgical system
US8568411Mar 31, 2009Oct 29, 2013Applied Medical Resources CorporationElectrosurgical system
US8568444Mar 7, 2012Oct 29, 2013Covidien LpMethod of transferring rotational motion in an articulating surgical instrument
US8579894Apr 1, 2009Nov 12, 2013Applied Medical Resources CorporationElectrosurgical system
US8591506Oct 16, 2012Nov 26, 2013Covidien AgVessel sealing system
US8597296Aug 31, 2012Dec 3, 2013Covidien AgBipolar forceps having monopolar extension
US8597297Aug 29, 2006Dec 3, 2013Covidien AgVessel sealing instrument with multiple electrode configurations
US8623017Jul 23, 2009Jan 7, 2014Covidien AgOpen vessel sealing instrument with hourglass cutting mechanism and overratchet safety
US8623276Feb 9, 2009Jan 7, 2014Covidien LpMethod and system for sterilizing an electrosurgical instrument
US8636761Oct 9, 2008Jan 28, 2014Covidien LpApparatus, system, and method for performing an endoscopic electrosurgical procedure
US8641713Sep 15, 2010Feb 4, 2014Covidien AgFlexible endoscopic catheter with ligasure
US8647341Oct 27, 2006Feb 11, 2014Covidien AgVessel sealer and divider for use with small trocars and cannulas
US8668689Apr 19, 2010Mar 11, 2014Covidien AgIn-line vessel sealer and divider
US8672859Oct 23, 2012Mar 18, 2014Boston Scientific Scimed, Inc.Biopsy forceps assemblies
US8679114Apr 23, 2010Mar 25, 2014Covidien AgIncorporating rapid cooling in tissue fusion heating processes
US8696667Aug 9, 2012Apr 15, 2014Covidien LpDual durometer insulating boot for electrosurgical forceps
US8721670Aug 26, 2013May 13, 2014Applied Medical Resources CorporationLaparoscopic scissors
US8734443Sep 19, 2008May 27, 2014Covidien LpVessel sealer and divider for large tissue structures
US8740901Jan 20, 2010Jun 3, 2014Covidien AgVessel sealing instrument with electrical cutting mechanism
US8764748Jan 28, 2009Jul 1, 2014Covidien LpEnd effector assembly for electrosurgical device and method for making the same
US8784417Aug 28, 2008Jul 22, 2014Covidien LpTissue fusion jaw angle improvement
US8795274Aug 28, 2008Aug 5, 2014Covidien LpTissue fusion jaw angle improvement
US8852183Jan 22, 2010Oct 7, 2014Microline Surgical Inc.Scissor tip for bipolar high frequency endoscope
US8852228Feb 8, 2012Oct 7, 2014Covidien LpApparatus, system, and method for performing an electrosurgical procedure
US8858554Jun 4, 2013Oct 14, 2014Covidien LpApparatus, system, and method for performing an electrosurgical procedure
US8882766Jan 24, 2006Nov 11, 2014Covidien AgMethod and system for controlling delivery of energy to divide tissue
US8898888Jan 26, 2012Dec 2, 2014Covidien LpSystem for manufacturing electrosurgical seal plates
US8915910Apr 1, 2009Dec 23, 2014Applied Medical Resources CorporationElectrosurgical system
US8939973Nov 27, 2013Jan 27, 2015Covidien AgSingle action tissue sealer
US8945125Sep 10, 2010Feb 3, 2015Covidien AgCompressible jaw configuration with bipolar RF output electrodes for soft tissue fusion
US8945126Nov 27, 2013Feb 3, 2015Covidien AgSingle action tissue sealer
US8945127Jan 23, 2014Feb 3, 2015Covidien AgSingle action tissue sealer
US8968314Sep 25, 2008Mar 3, 2015Covidien LpApparatus, system and method for performing an electrosurgical procedure
US9023043Sep 23, 2008May 5, 2015Covidien LpInsulating mechanically-interfaced boot and jaws for electrosurgical forceps
US9028493Mar 8, 2012May 12, 2015Covidien LpIn vivo attachable and detachable end effector assembly and laparoscopic surgical instrument and methods therefor
US9039694Oct 20, 2011May 26, 2015Just Right Surgical, LlcRF generator system for surgical vessel sealing
US9095347Sep 18, 2008Aug 4, 2015Covidien AgElectrically conductive/insulative over shoe for tissue fusion
US9107672Jul 19, 2006Aug 18, 2015Covidien AgVessel sealing forceps with disposable electrodes
US9113898Sep 9, 2011Aug 25, 2015Covidien LpApparatus, system, and method for performing an electrosurgical procedure
US9113903Oct 29, 2012Aug 25, 2015Covidien LpEndoscopic vessel sealer and divider for large tissue structures
US9113905Jun 20, 2013Aug 25, 2015Covidien LpVariable resistor jaw
US9113940Feb 22, 2012Aug 25, 2015Covidien LpTrigger lockout and kickback mechanism for surgical instruments
US9144455Jun 6, 2011Sep 29, 2015Just Right Surgical, LlcLow power tissue sealing device and method
US9149323Jan 25, 2010Oct 6, 2015Covidien AgMethod of fusing biomaterials with radiofrequency energy
US9179929May 12, 2014Nov 10, 2015Applied Medical Resources CorporationLaparoscopic scissors
US9198717Feb 2, 2015Dec 1, 2015Covidien AgSingle action tissue sealer
US9198724Apr 8, 2011Dec 1, 2015Covidien LpMicrowave tissue dissection and coagulation
US9247988Jul 21, 2015Feb 2, 2016Covidien LpVariable resistor jaw
US9265552Dec 2, 2014Feb 23, 2016Covidien LpMethod of manufacturing electrosurgical seal plates
US9314295Oct 20, 2011Apr 19, 2016Covidien LpDissection scissors on surgical device
US9320563Feb 6, 2012Apr 26, 2016Applied Medical Resources CorporationElectrosurgical instruments and connections thereto
US9345535Oct 14, 2014May 24, 2016Covidien LpApparatus, system and method for performing an electrosurgical procedure
US20040199160 *Jul 25, 2003Oct 7, 2004Symbiosis CorporationBipolar endoscopic surgical scissor blades and instrument incorporating the same
US20050043758 *Aug 18, 2003Feb 24, 2005Scimed Life Systems, Inc.Endoscopic medical instrument and related methods of use
US20050101965 *Nov 14, 2001May 12, 2005Sherwood Services AgApparatus and method for sealing and cutting tissue
US20060195084 *Apr 26, 2006Aug 31, 2006Boston Scientific Miami CorporationBipolar endoscopic surgical scissor blades and instrument incorporating the same
US20070244497 *Apr 16, 2007Oct 18, 2007Applied Medical Resources CorporationLaparoscopic scissor blades
US20080167651 *Dec 21, 2007Jul 10, 2008Tetzlaff Philip MVessel sealing instrument
US20090281561 *May 11, 2009Nov 12, 2009Applied Medical Resources CorporationLaparoscopic scissors
US20100057071 *Aug 25, 2009Mar 4, 2010Francis AmoahElectrosurgical instrument and system
US20100094287 *Oct 9, 2008Apr 15, 2010Tyco Heathcare Group LpApparatus, System, and Method for Performing an Endoscopic Electrosurgical Procedure
US20100312240 *Jan 22, 2010Dec 9, 2010Microline Surgical Inc.Scissor tip for bipolar high frequency endoscope
US20110196368 *Aug 11, 2011Covidien AgOpen Vessel Sealing Instrument
USD499181May 15, 2003Nov 30, 2004Sherwood Services AgHandle for a vessel sealer and divider
USD649249Nov 22, 2011Tyco Healthcare Group LpEnd effectors of an elongated dissecting and dividing instrument
USD680220Apr 16, 2013Coviden IPSlider handle for laparoscopic device
USD748259Dec 29, 2014Jan 26, 2016Applied Medical Resources CorporationElectrosurgical instrument
USRE44834Dec 7, 2012Apr 8, 2014Covidien AgInsulating boot for electrosurgical forceps
Classifications
U.S. Classification606/45, 606/50, 606/48
International ClassificationA61B18/14, A61B18/18
Cooperative ClassificationA61B2018/00107, A61B2018/1432, A61B18/1402, A61B2018/126, A61B2018/1861, A61B18/1445, A61B2017/2945, A61B2018/00083, A61B2018/1412, A61B2017/0088
European ClassificationA61B18/14F2
Legal Events
DateCodeEventDescription
Apr 12, 2002ASAssignment
Owner name: GYRUS MEDICAL, INC., MINNESOTA
Free format text: CHANGE OF NAME;ASSIGNOR:EVEREST MEDICAL CORPORATION;REEL/FRAME:012802/0936
Effective date: 20010405
Jun 20, 2002FPAYFee payment
Year of fee payment: 8
Jun 20, 2002SULPSurcharge for late payment
Year of fee payment: 7
Aug 17, 2005ASAssignment
Owner name: THE GOVERNOR AND COMPANY OF THE BANK OF SCOTLAND,
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GYRUS MEDICAL, INC.;REEL/FRAME:016408/0631
Effective date: 20050721
Aug 18, 2005ASAssignment
Owner name: THE GOVERNOR AND COMPANY OF THE BANK OF SCOTLAND,
Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE NATURE OF DOCUMENT ERRONEOUSLY RECORDED AS AN ASSIGNMENT TO RECORDATION OF GRANT OF SECURITY INTEREST PREVIOUSLY RECORDED ON REEL 016408 FRAME 0631;ASSIGNOR:GYRUS MEDICAL, INC.;REEL/FRAME:016418/0162
Effective date: 20050721
Mar 13, 2006FPAYFee payment
Year of fee payment: 12
May 3, 2011DIAdverse decision in interference