CA2071759A1 - Entitled coaxial flow irrigating and aspirating ultrasonic handpiece - Google Patents
Entitled coaxial flow irrigating and aspirating ultrasonic handpieceInfo
- Publication number
- CA2071759A1 CA2071759A1 CA002071759A CA2071759A CA2071759A1 CA 2071759 A1 CA2071759 A1 CA 2071759A1 CA 002071759 A CA002071759 A CA 002071759A CA 2071759 A CA2071759 A CA 2071759A CA 2071759 A1 CA2071759 A1 CA 2071759A1
- Authority
- CA
- Canada
- Prior art keywords
- handpiece
- inner shell
- irrigation
- outer shell
- ultrasonic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/00736—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments
- A61F9/00745—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments using mechanical vibrations, e.g. ultrasonic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
- A61B2017/320084—Irrigation sleeves
Abstract
COAXIAL FLOW IRRIGATING AND
ASPIRATING ULTRASONIC HANDPIECE
Abstract of the Disclosure A coaxial flow irrigation and aspiration ultrasonic handpiece for use in surgical operations includes the combination of an elongated outer shell, inner shell and ultrasonic horn assembly disposed within the inner shell. A sealing end cap is provided which functions to center the inner shell within the outer shell as well as to form an irrigation channel therebetween for supplying irrigation fluid to the distal end tip of the surgical handpiece. The sealing end cap includes an irrigation channel and electrical cable integrally therewith to facilitate ease of assembly of the handpiece as well as connection with sources of irrigation fluid and means for providing aspiration.
ASPIRATING ULTRASONIC HANDPIECE
Abstract of the Disclosure A coaxial flow irrigation and aspiration ultrasonic handpiece for use in surgical operations includes the combination of an elongated outer shell, inner shell and ultrasonic horn assembly disposed within the inner shell. A sealing end cap is provided which functions to center the inner shell within the outer shell as well as to form an irrigation channel therebetween for supplying irrigation fluid to the distal end tip of the surgical handpiece. The sealing end cap includes an irrigation channel and electrical cable integrally therewith to facilitate ease of assembly of the handpiece as well as connection with sources of irrigation fluid and means for providing aspiration.
Description
- 2 ~
~ . . .
COAXIAL_FLOW IRRIGATIMG_AND
ASPIRA~ING ULTRASONIC HA~NDPIECE
Field of the Invention The invention rela~es to a coaxial flow irrigating and a~pirating ultrasonic surgical handpiece which i9 particularly effective in ophthalmic surgery. The S ultrasonic surgical handpiece includes the combination of an inner and outer sleeve together with a sealing cap which, in one aspect, permit influx of irriga~ion fluid via the proximal end of the handpiece to provide a more easily manipulated surgical tool.
~ack~round Art In ~he prior art, a plurality of hand-held devices have been proposed for removal of body tissue during surgical procedure~. One particular surgical device include~ an ultrasonically driven surgical tool which includes both irrigation fluid supply as well as a so~rce of vacuum for aqpiration. Typically, these devicas have the irrigation fluid supply tube configured in close proximity to the surgical tip assembly, thereby in~erfering with easy maneuvering of the handpiece during surgery. United States Patent Num~ers 4,753,234 to Martinez and 4,861,332 to Parisi show surgical cutting ins~ruments having these types of irrigation fluid tube configurations.
Other prior art devices have been proposed wherein r,~
the surgical handpiec0s incLude a proximal end cap which introduces or provides acce~s therethrough for means to operate the surgical handpiece. United State-~Patent Number 4,S77,629 to Martinez discloses a surgical cutting instrument for use in ophthalmic surgery which includes a rear plug. The rear plu~ has a first bore to penmit aspiration of cut material and a second bora for supplying air pressure to the cutting mechanism within the instrument. United States Patent Number 4,316,465 to Dotson, Jr. discloses an ophthalmic handpiece which includes a naedle having coaxially irrigation and aspiration passageways. The handpiece also includeY a rear plug having tubing connectors therein for connection with an irrigation fluid source and a source of aspiration or vacuum. Neither of these patents disclosing surgical cutting instruments having end caps or plugs therewith teach or fairly suqgest all of the features of the present invention including an ultrasonic handpiece having an inner and outer shell and sealing end cap therewith.
United States Patent Number 4,804,364 to Dieras et al. discloses another ultrasound apparatus intended for the curettage of biological tissue u~ing ultrasonic vibrations. In thi~ device, and in an effort to improve upon prior art devices that include suction and irrigation conduits which greatly exaggerate the diameter of a surgical handpiece, a connector block is provided at the proximal end of the handpiece which includes an irrigation tube therethrough as well as à
connector connected to a source of vacuum.
However, a need has developed to provide improved ultrasonic handpieces which are uniformly sized to permit ease of handling, include features that facilitate assembly or disassembly of the handpiece, ~ ~7 ~
provide separation between electronics and fluids and simplify the overall surgical handpiece design.
In response to this need, an ultrasonic surgical handpiece has been developed which includes a outer shell, inner shell, an ultrasound horn assembly within the inner shell and a sealing end cap to facilitate connection ~o a source of irrigation fluid, electrical power and a source of aspiration.
None of the prior art mentioned above teaches or fairly suggest all of the features of the present invention including the combination of inner and outer shells, ultrasound horn assembly and sealing end cap.
Summ ry of the Invention It is accordingly an object of the present invention to provide an ultrasonic surgical handpiece having coaxial flow paths for irrigation fluids and aspirated body tissue or other material.
It is a further object of the present invention to provide an ultrasonic handpiece having a uniform and slim design to permit ease of manipulation during surgical procedures.
It is a still further object of the present invention to provide an ultrasonic handpiece which provides separation between fluids passing there~hrough and electrical components to reduce or eliminate the possibility of electrical short circuiting.
It is a further object of the present invention to provide an ultrasonic handpiece which includes an inner and outer shell and sealing means which eliminate internal tubing as well a4 provide for ease of assembly and disassembly of the handpiece.
In qatisfaction of the foregoing objects and advantages, there is provided an ultrasonic handpiece 2 ~
assembly having coaxial flow paths for irrigation and aspiration which includes the combination of an outer shell, inner shell, ultrasonic horn assembly and sealing end cap. The inner shell and sealing end cap are designed to engage the inner surface of the outer shell to create an irrigation flow path as well as separate irrigating fluids from the electrical components of the ultrasonic horn assembly. The sealing end cap also facilitates ease of assembly by centering the inner shell within the outer shell as well as preventing leakage of irrigation fluid outside the handpiece. In a further embodiment, the sealing means cooperate with the ultrasonic horn assembly to prevent rotation thereof during u e of the surgical handpiece.
Brief Descript~on of Drawinqs Reference is now made to the drawings accompanying the application wherein:
Figure 1 is a side view partly in cross-section of the ultrasonic surgical handpiece of the presen~
invention.
Figure 2 is a cross-sectional view along the line II-II as depicted in Figure 1.
Figure 3 shows a cross sectional view of the proximal end of the handpiece depicted in Figure 1 enlarged to show greater detail.
Figure 4 shows a cross-sectional view along the line IV-IY as depicted in Figure 3.
Description of the Preferred Emhodiments The present invention is concerned with an improved coaxial flow irrigation and aspiration 20 l 17 5 ~
ultrasonic handpiece that may be used in surgical procedures such as ophthalmic surgery. According to the present invention, it has been discovered that the risk of electrical short circuiting may be reduced or eliminated by the novel combination of an outer shell, inner shell, ultrasound horn assembly and sealing end cap which provide separation between the electrical components of the horn assembly and irrigating fluid flowing therethrough. The ultrasonic handpiece of the ~0 present invention also provides a slim and more easily maneuverable design by including means in the sealing end cap for transmission of irrigation fluid, flow of aspira~ed materials and electrical conductors. In addition, the combination of the inner and outer sleeves provides a handpiece design which is easily assembled or disassembled by removal of the se~ling end cap and achieves coaxially flow of irrigants and a3pirants with a minimum nu~ber of apparatuY elements.
No special tubirlg or other connectors, as are included in other prior art devices, are necessary in the design of the inventi~e ultrasonic surgical handpiece.
With reference to Figure 1, a fir~t embodiment of the inventive coaxial flow ultrasonic surgical handpiece is de~ignated by the reference numeral 10 and seen to include an ultra~onic horn asqembly 2 having an aspiration port 4 therethrough, an elongated tubular inner shell 6 and an elongated tubular outer shell 8.
The inner shell 6 is disposed within thc outer shell 8 so a~ to fo~m an irrigation channel 12 therebetween.
The irrigation channel 12 communicates with the annulus 14 which surrounds the ultrasonic horn assembly 4 via the passageway 16 which is configured between the shoulder 18 of the outer shell 8 and the shoulder 20 of the inner shell 6. The manner in which 2 ~
the irrigation channel 12 and annulus 14 interconnect as well as the engagement of the shoulder 18 of the outer shell 8 with the shoulder 20 of ~he inner shell 6 will be described in greater detail hereinafter. By axially aligning the inner shell 6 with the outer shell 8, a coaxial flow relationship is formed between the aspiration port 4 and the annulus 14 and irrigation channel 12.
It should be understood that any known ultrasonic horn assembly having an aspira~ion port therethrough and capable of transmitting vibrations along the distal end thereof for surgical procedures may be utilized in the invention ultrasonic surgical handpiece. Since these types of vibratory cutting in~truments are well known in the art, the ultrasonic horn assembly is not considered an aspect of the present invention, and therefor, a further specific de~cription of the individual components thereof is not deemed necessary.
The proximal end of the ultrasonic handpiece 10 includes a sealing end cap 22 which engages the proximal end portions of the inner shell 6 and outer shell 8. The sealing end cap 22 is further secured in place by the combination of a slip washer (not shown) and a compre~sion nut 24 which i designed to threadably engage the outer shell 8. The sealing end cap 22 is configured to provide access therethrough for irrigation fluid, flow of aspirants and conduction of elec~rical power to the ultrasonic horn assembly.
Specifically, the ssaling end cap 22 includes irrigation tubing 26 there~hrough, a port 30 for permitting passage of the proximal end of the ultrasonic horn assembly therethrough and an electrical cable 28 to provide electrical power to the ultrasonic horn assembly electrical components. In this manner, 7 ~ ~
entry and exit of all fluids and electrical power are located at the proximal end of the ultrasonic handpiece 10 to provide a uniform and slim design to facilitate ease of use during surgery.
In the preferred embodiment, the irrigation tube 26 include~ a coupling portion 32 at the proximal end thereof and i~ integrally molded in place in the sealing end cap 22. In addition, the electrical cable 28 is molded in the sealing and cap 22 and includes electrical connectors 3~ at the ends thereof to facilitate connection between a power source and the ultrasonic horn as~embly electrical connector 35. By providing a suf ficient amount of electrical conductor between the ultrasonic horn aRsembly and the sealing end cap disposed within the inner shell, an electrical connection may be made prior to engaging the sealing end cap 22 onto the distal end of the surgical handpiece 10. Of course, other means of providing electrical interconnection between a power source (not shown) and the ultrasonic horn assembly may be utilized.
With reference now to Figures 1 and 2, the manner in which the inner shell 6 engages the outer shell will now b~ de~cribed. The shoulder 20 of the inner shell 6 include~ a plurality of vane~ 36 extending outwardly therefrom. The vanes 36 are designed to seat against the face 38 of the shoulder 18 of the outer shell 8.
The shoulder 18 is angled toward~ the distal end of the handpiece 10 to further center the inner shell 6 within the outer shell 8. Although vanes 36 are depicted in combination with the shoulder 2Q, other means of providing a passageway interconnecting the irrigation channel 12 and annulus 14 may be utilized. One example of an alternative configuration would be to have the 2 ~
shoulder 20 directly seat against the facs 38 of the shoulder 18. In this configuration, ports may be included through the shoulder 20 to interconnect the irrigatlon channel 12 and annulus 14.
With reference to Figure 1 again, the shoulder 20 cooperates with the stepped portion 40 of the horn assembly 2 and an O-ring 42 to create a seal between the interior of the inner shell 6 and the annulus 14.
As will be described in more detail later, compression of the sealing end cap 22 by the compression nut 24 forces the ultrasonic horn a~sembly 2 towards th~
distal end of the handpiece 10 which pro~ides a seal by compression of the O-ring 42 bet~een the shoulder 20 and step portion 40 of the ultra~onic horn a~sembly 2.
lS With reference to Figure 3, the proximal end of the handpiece lO is shown enlarged and with parts in cross-sec~ion to show greater detail concerning the sealing end cap 22 and its intended function. The ultrasonic horn assembly 2 includes a washer 44 which may be, for example, attached to the ultrasonic horn assembly by soldering at reference numeral 46. The washex 44 include~ a barbed face 48 which is designed to engage the oppo~ing face 50 of the sealing end cap 22. Upon compression of the sealing end cap 22 by the compre~sion nut 24, the barbed face 48 of the washer 44 engages the face 50 of the sealing end cap 22 to prevent rotation of the ul~rasonic horn assembly durLng use.
Tho sealing end cap 22 is configured in such a mannar as to provide a plurality of sealing areas to prevent leakage of irrigaticn fluid into the inner chamber of inner shell 6 or leakage past the outer shell 8 and compression nut 24. A first sealing area includes the face 52 of the sealing end cap 22 engaging 2 ~
the inner surfac~ of the proximal end of the inner shell 6. In cooperation with this first sealing area, a second sealing area is provided by the face 54 on the stepped portion 56 of the sealing end cap 22 which is designed to engage the proximal end face of the inner shell 6. These two sealing areas effectiYely prevent influx of irrigation fluid within the chamber housing the ultrasonic horn assembly and electrical components therewith.
The sealing end cap also provides a sealing area for the outer shell 8 by engagement of the face 58 of the sealing end cap 22 and the inner surface of the proximal end of ths outer shell 8. Another sealing area is indicated by engagement of the inner surface of lS the bore 62 in the sealing end cap 22 and the outer surface of the proximal end of the ultrasonic horn assembly 64. The ultrasonic horn as3embly 2 may include a reduced diameter proximal end portion 66 to facilitate attachment to a source of vacuum via tubing or the like.
With reference to Figure 4, a cross-sectional view along the line IV-IV more clearly depicted the manner in which the inner shell 6 is centered within the outer shell 8. As can be seen from Figure 4, the inner shell 6 and ou~er shell 8 create the annular irrigation chann~l 12 which permits ~low of irrigating fluid to the distal end tip of the ultrasonic handpiece 10.
When assembling the ultrasonic handpiece, the ultrasonic horn assembly and inner shell are disposed within the outer shell 8 such that the shoulder 20 of the inner shell 6 engages the shoulder 18 of the outer ~hell 8. In addition, the O-ring 42 engages the inner face shoulder 20 of the inner shell 6. Once the ultrasonic horn a~sembly is in place, an electrical 7 ~ ~
connec~ion may be made between the source of electrical power (no~ shown) via electrical conductor 23 and the electrical components of the ultrasonic horn assembly 2. Once the electrical connection is made, the sealing end cap is placed in~o the outer shell 8 and pushed against th~ inner shell 6. The stepped configuration of the sealing end cap 22 permits contact between the scaling end cap 22 and the inner surface of the inner shell as well as the proximal end face thereof. By this configuration, the inner shell is axially aligned with the outer shell 8 and thc ultrasonic horn assembly 2. The length of the stepped portion 56 of the sealing end cap 22 is longer than the dis~ance between the proximal end face of the inner shell 6 and the proximal end f~ce of the outer shell 8. With this configuration, threading of the compression nut 24 and slip washer 68 compresses the sealing end cap 22 and causes the cap 22 to bell outwardly and push down again~t the inner sAell causing the ultra~onic horn a~s~mbly and O ring 42 to seal itself against the inner shell. In addition, this expansion and pushing of the ssaling end cap 22 provides sealing between the interior of ths inner shell 6 and the irrigation charmel lZ and between tha irrigation channel 12 and the exterior of the surgical handpiece. Furthermore, compre~sion of the sealing end cap 22 causeq the seal to embed itself against the barbed surface 48 of the washer 44 to prevent rotation of the horn assembly 2 during U~2.
The sealing end cap may be made out of any material having sufficient flexibility to provide sealing against surface~ of the inner and outer shell.
A preferred material would include silicon. A
preferred material ~or the inner shell would include 2~7~
pla~tic to ~urther minimize khe possibility of electrical short circuiting. A preferred material for the outer shell wo~ld include a metallic material.
As such, an inYention ha~ been di~closed in teLm~
of prefexred embodiments thereof which fulfill each and eve~y one of the ob~ects of the invention as sat forth hereinabove and provide~ a new and improved coaxially flow irrigation and aspira~ion ultrasonic surgical handpiece.
Of course, various changes, modifications and alteration~ in the teachings of the present invention may be contemplated by tho~e skilled in the art without departinq from the intended spirit and scope thereof.
AR such, it is intended that the present invention only be limited by the term3 of the appended claims.
~ . . .
COAXIAL_FLOW IRRIGATIMG_AND
ASPIRA~ING ULTRASONIC HA~NDPIECE
Field of the Invention The invention rela~es to a coaxial flow irrigating and a~pirating ultrasonic surgical handpiece which i9 particularly effective in ophthalmic surgery. The S ultrasonic surgical handpiece includes the combination of an inner and outer sleeve together with a sealing cap which, in one aspect, permit influx of irriga~ion fluid via the proximal end of the handpiece to provide a more easily manipulated surgical tool.
~ack~round Art In ~he prior art, a plurality of hand-held devices have been proposed for removal of body tissue during surgical procedure~. One particular surgical device include~ an ultrasonically driven surgical tool which includes both irrigation fluid supply as well as a so~rce of vacuum for aqpiration. Typically, these devicas have the irrigation fluid supply tube configured in close proximity to the surgical tip assembly, thereby in~erfering with easy maneuvering of the handpiece during surgery. United States Patent Num~ers 4,753,234 to Martinez and 4,861,332 to Parisi show surgical cutting ins~ruments having these types of irrigation fluid tube configurations.
Other prior art devices have been proposed wherein r,~
the surgical handpiec0s incLude a proximal end cap which introduces or provides acce~s therethrough for means to operate the surgical handpiece. United State-~Patent Number 4,S77,629 to Martinez discloses a surgical cutting instrument for use in ophthalmic surgery which includes a rear plug. The rear plu~ has a first bore to penmit aspiration of cut material and a second bora for supplying air pressure to the cutting mechanism within the instrument. United States Patent Number 4,316,465 to Dotson, Jr. discloses an ophthalmic handpiece which includes a naedle having coaxially irrigation and aspiration passageways. The handpiece also includeY a rear plug having tubing connectors therein for connection with an irrigation fluid source and a source of aspiration or vacuum. Neither of these patents disclosing surgical cutting instruments having end caps or plugs therewith teach or fairly suqgest all of the features of the present invention including an ultrasonic handpiece having an inner and outer shell and sealing end cap therewith.
United States Patent Number 4,804,364 to Dieras et al. discloses another ultrasound apparatus intended for the curettage of biological tissue u~ing ultrasonic vibrations. In thi~ device, and in an effort to improve upon prior art devices that include suction and irrigation conduits which greatly exaggerate the diameter of a surgical handpiece, a connector block is provided at the proximal end of the handpiece which includes an irrigation tube therethrough as well as à
connector connected to a source of vacuum.
However, a need has developed to provide improved ultrasonic handpieces which are uniformly sized to permit ease of handling, include features that facilitate assembly or disassembly of the handpiece, ~ ~7 ~
provide separation between electronics and fluids and simplify the overall surgical handpiece design.
In response to this need, an ultrasonic surgical handpiece has been developed which includes a outer shell, inner shell, an ultrasound horn assembly within the inner shell and a sealing end cap to facilitate connection ~o a source of irrigation fluid, electrical power and a source of aspiration.
None of the prior art mentioned above teaches or fairly suggest all of the features of the present invention including the combination of inner and outer shells, ultrasound horn assembly and sealing end cap.
Summ ry of the Invention It is accordingly an object of the present invention to provide an ultrasonic surgical handpiece having coaxial flow paths for irrigation fluids and aspirated body tissue or other material.
It is a further object of the present invention to provide an ultrasonic handpiece having a uniform and slim design to permit ease of manipulation during surgical procedures.
It is a still further object of the present invention to provide an ultrasonic handpiece which provides separation between fluids passing there~hrough and electrical components to reduce or eliminate the possibility of electrical short circuiting.
It is a further object of the present invention to provide an ultrasonic handpiece which includes an inner and outer shell and sealing means which eliminate internal tubing as well a4 provide for ease of assembly and disassembly of the handpiece.
In qatisfaction of the foregoing objects and advantages, there is provided an ultrasonic handpiece 2 ~
assembly having coaxial flow paths for irrigation and aspiration which includes the combination of an outer shell, inner shell, ultrasonic horn assembly and sealing end cap. The inner shell and sealing end cap are designed to engage the inner surface of the outer shell to create an irrigation flow path as well as separate irrigating fluids from the electrical components of the ultrasonic horn assembly. The sealing end cap also facilitates ease of assembly by centering the inner shell within the outer shell as well as preventing leakage of irrigation fluid outside the handpiece. In a further embodiment, the sealing means cooperate with the ultrasonic horn assembly to prevent rotation thereof during u e of the surgical handpiece.
Brief Descript~on of Drawinqs Reference is now made to the drawings accompanying the application wherein:
Figure 1 is a side view partly in cross-section of the ultrasonic surgical handpiece of the presen~
invention.
Figure 2 is a cross-sectional view along the line II-II as depicted in Figure 1.
Figure 3 shows a cross sectional view of the proximal end of the handpiece depicted in Figure 1 enlarged to show greater detail.
Figure 4 shows a cross-sectional view along the line IV-IY as depicted in Figure 3.
Description of the Preferred Emhodiments The present invention is concerned with an improved coaxial flow irrigation and aspiration 20 l 17 5 ~
ultrasonic handpiece that may be used in surgical procedures such as ophthalmic surgery. According to the present invention, it has been discovered that the risk of electrical short circuiting may be reduced or eliminated by the novel combination of an outer shell, inner shell, ultrasound horn assembly and sealing end cap which provide separation between the electrical components of the horn assembly and irrigating fluid flowing therethrough. The ultrasonic handpiece of the ~0 present invention also provides a slim and more easily maneuverable design by including means in the sealing end cap for transmission of irrigation fluid, flow of aspira~ed materials and electrical conductors. In addition, the combination of the inner and outer sleeves provides a handpiece design which is easily assembled or disassembled by removal of the se~ling end cap and achieves coaxially flow of irrigants and a3pirants with a minimum nu~ber of apparatuY elements.
No special tubirlg or other connectors, as are included in other prior art devices, are necessary in the design of the inventi~e ultrasonic surgical handpiece.
With reference to Figure 1, a fir~t embodiment of the inventive coaxial flow ultrasonic surgical handpiece is de~ignated by the reference numeral 10 and seen to include an ultra~onic horn asqembly 2 having an aspiration port 4 therethrough, an elongated tubular inner shell 6 and an elongated tubular outer shell 8.
The inner shell 6 is disposed within thc outer shell 8 so a~ to fo~m an irrigation channel 12 therebetween.
The irrigation channel 12 communicates with the annulus 14 which surrounds the ultrasonic horn assembly 4 via the passageway 16 which is configured between the shoulder 18 of the outer shell 8 and the shoulder 20 of the inner shell 6. The manner in which 2 ~
the irrigation channel 12 and annulus 14 interconnect as well as the engagement of the shoulder 18 of the outer shell 8 with the shoulder 20 of ~he inner shell 6 will be described in greater detail hereinafter. By axially aligning the inner shell 6 with the outer shell 8, a coaxial flow relationship is formed between the aspiration port 4 and the annulus 14 and irrigation channel 12.
It should be understood that any known ultrasonic horn assembly having an aspira~ion port therethrough and capable of transmitting vibrations along the distal end thereof for surgical procedures may be utilized in the invention ultrasonic surgical handpiece. Since these types of vibratory cutting in~truments are well known in the art, the ultrasonic horn assembly is not considered an aspect of the present invention, and therefor, a further specific de~cription of the individual components thereof is not deemed necessary.
The proximal end of the ultrasonic handpiece 10 includes a sealing end cap 22 which engages the proximal end portions of the inner shell 6 and outer shell 8. The sealing end cap 22 is further secured in place by the combination of a slip washer (not shown) and a compre~sion nut 24 which i designed to threadably engage the outer shell 8. The sealing end cap 22 is configured to provide access therethrough for irrigation fluid, flow of aspirants and conduction of elec~rical power to the ultrasonic horn assembly.
Specifically, the ssaling end cap 22 includes irrigation tubing 26 there~hrough, a port 30 for permitting passage of the proximal end of the ultrasonic horn assembly therethrough and an electrical cable 28 to provide electrical power to the ultrasonic horn assembly electrical components. In this manner, 7 ~ ~
entry and exit of all fluids and electrical power are located at the proximal end of the ultrasonic handpiece 10 to provide a uniform and slim design to facilitate ease of use during surgery.
In the preferred embodiment, the irrigation tube 26 include~ a coupling portion 32 at the proximal end thereof and i~ integrally molded in place in the sealing end cap 22. In addition, the electrical cable 28 is molded in the sealing and cap 22 and includes electrical connectors 3~ at the ends thereof to facilitate connection between a power source and the ultrasonic horn as~embly electrical connector 35. By providing a suf ficient amount of electrical conductor between the ultrasonic horn aRsembly and the sealing end cap disposed within the inner shell, an electrical connection may be made prior to engaging the sealing end cap 22 onto the distal end of the surgical handpiece 10. Of course, other means of providing electrical interconnection between a power source (not shown) and the ultrasonic horn assembly may be utilized.
With reference now to Figures 1 and 2, the manner in which the inner shell 6 engages the outer shell will now b~ de~cribed. The shoulder 20 of the inner shell 6 include~ a plurality of vane~ 36 extending outwardly therefrom. The vanes 36 are designed to seat against the face 38 of the shoulder 18 of the outer shell 8.
The shoulder 18 is angled toward~ the distal end of the handpiece 10 to further center the inner shell 6 within the outer shell 8. Although vanes 36 are depicted in combination with the shoulder 2Q, other means of providing a passageway interconnecting the irrigation channel 12 and annulus 14 may be utilized. One example of an alternative configuration would be to have the 2 ~
shoulder 20 directly seat against the facs 38 of the shoulder 18. In this configuration, ports may be included through the shoulder 20 to interconnect the irrigatlon channel 12 and annulus 14.
With reference to Figure 1 again, the shoulder 20 cooperates with the stepped portion 40 of the horn assembly 2 and an O-ring 42 to create a seal between the interior of the inner shell 6 and the annulus 14.
As will be described in more detail later, compression of the sealing end cap 22 by the compression nut 24 forces the ultrasonic horn a~sembly 2 towards th~
distal end of the handpiece 10 which pro~ides a seal by compression of the O-ring 42 bet~een the shoulder 20 and step portion 40 of the ultra~onic horn a~sembly 2.
lS With reference to Figure 3, the proximal end of the handpiece lO is shown enlarged and with parts in cross-sec~ion to show greater detail concerning the sealing end cap 22 and its intended function. The ultrasonic horn assembly 2 includes a washer 44 which may be, for example, attached to the ultrasonic horn assembly by soldering at reference numeral 46. The washex 44 include~ a barbed face 48 which is designed to engage the oppo~ing face 50 of the sealing end cap 22. Upon compression of the sealing end cap 22 by the compre~sion nut 24, the barbed face 48 of the washer 44 engages the face 50 of the sealing end cap 22 to prevent rotation of the ul~rasonic horn assembly durLng use.
Tho sealing end cap 22 is configured in such a mannar as to provide a plurality of sealing areas to prevent leakage of irrigaticn fluid into the inner chamber of inner shell 6 or leakage past the outer shell 8 and compression nut 24. A first sealing area includes the face 52 of the sealing end cap 22 engaging 2 ~
the inner surfac~ of the proximal end of the inner shell 6. In cooperation with this first sealing area, a second sealing area is provided by the face 54 on the stepped portion 56 of the sealing end cap 22 which is designed to engage the proximal end face of the inner shell 6. These two sealing areas effectiYely prevent influx of irrigation fluid within the chamber housing the ultrasonic horn assembly and electrical components therewith.
The sealing end cap also provides a sealing area for the outer shell 8 by engagement of the face 58 of the sealing end cap 22 and the inner surface of the proximal end of ths outer shell 8. Another sealing area is indicated by engagement of the inner surface of lS the bore 62 in the sealing end cap 22 and the outer surface of the proximal end of the ultrasonic horn assembly 64. The ultrasonic horn as3embly 2 may include a reduced diameter proximal end portion 66 to facilitate attachment to a source of vacuum via tubing or the like.
With reference to Figure 4, a cross-sectional view along the line IV-IV more clearly depicted the manner in which the inner shell 6 is centered within the outer shell 8. As can be seen from Figure 4, the inner shell 6 and ou~er shell 8 create the annular irrigation chann~l 12 which permits ~low of irrigating fluid to the distal end tip of the ultrasonic handpiece 10.
When assembling the ultrasonic handpiece, the ultrasonic horn assembly and inner shell are disposed within the outer shell 8 such that the shoulder 20 of the inner shell 6 engages the shoulder 18 of the outer ~hell 8. In addition, the O-ring 42 engages the inner face shoulder 20 of the inner shell 6. Once the ultrasonic horn a~sembly is in place, an electrical 7 ~ ~
connec~ion may be made between the source of electrical power (no~ shown) via electrical conductor 23 and the electrical components of the ultrasonic horn assembly 2. Once the electrical connection is made, the sealing end cap is placed in~o the outer shell 8 and pushed against th~ inner shell 6. The stepped configuration of the sealing end cap 22 permits contact between the scaling end cap 22 and the inner surface of the inner shell as well as the proximal end face thereof. By this configuration, the inner shell is axially aligned with the outer shell 8 and thc ultrasonic horn assembly 2. The length of the stepped portion 56 of the sealing end cap 22 is longer than the dis~ance between the proximal end face of the inner shell 6 and the proximal end f~ce of the outer shell 8. With this configuration, threading of the compression nut 24 and slip washer 68 compresses the sealing end cap 22 and causes the cap 22 to bell outwardly and push down again~t the inner sAell causing the ultra~onic horn a~s~mbly and O ring 42 to seal itself against the inner shell. In addition, this expansion and pushing of the ssaling end cap 22 provides sealing between the interior of ths inner shell 6 and the irrigation charmel lZ and between tha irrigation channel 12 and the exterior of the surgical handpiece. Furthermore, compre~sion of the sealing end cap 22 causeq the seal to embed itself against the barbed surface 48 of the washer 44 to prevent rotation of the horn assembly 2 during U~2.
The sealing end cap may be made out of any material having sufficient flexibility to provide sealing against surface~ of the inner and outer shell.
A preferred material would include silicon. A
preferred material ~or the inner shell would include 2~7~
pla~tic to ~urther minimize khe possibility of electrical short circuiting. A preferred material for the outer shell wo~ld include a metallic material.
As such, an inYention ha~ been di~closed in teLm~
of prefexred embodiments thereof which fulfill each and eve~y one of the ob~ects of the invention as sat forth hereinabove and provide~ a new and improved coaxially flow irrigation and aspira~ion ultrasonic surgical handpiece.
Of course, various changes, modifications and alteration~ in the teachings of the present invention may be contemplated by tho~e skilled in the art without departinq from the intended spirit and scope thereof.
AR such, it is intended that the present invention only be limited by the term3 of the appended claims.
Claims (11)
1. An ultrasonic coaxial flow irrigation and aspiration handpiece for use in removal of body tissue during surgery comprising:
a) an ultrasonic horn assembly having an aspiration port therethrough;
b) an elongate tubular inner shell surrounding a body portion of said ultrasonic horn assembly;
c) an elongate tubular outer shell surrounding said ultrasonic horn assembly and said inner shell, and forming a first irrigation fluid annulus between said outer shell and said inner shell and a second irrigation fluid annulus between said outer shell and a tip portion of said ultrasonic horn assembly; and d) first sealing means engaging the proximal end of each of said outer shell and inner shell to axially align and secure said inner shell within said outer shell and provide coaxial flow of irrigation and aspiration.
a) an ultrasonic horn assembly having an aspiration port therethrough;
b) an elongate tubular inner shell surrounding a body portion of said ultrasonic horn assembly;
c) an elongate tubular outer shell surrounding said ultrasonic horn assembly and said inner shell, and forming a first irrigation fluid annulus between said outer shell and said inner shell and a second irrigation fluid annulus between said outer shell and a tip portion of said ultrasonic horn assembly; and d) first sealing means engaging the proximal end of each of said outer shell and inner shell to axially align and secure said inner shell within said outer shell and provide coaxial flow of irrigation and aspiration.
2. The handpiece of claim 1 wherein said sealing means includes means for coupling a source of irrigation fluid to said first irrigation annulus.
3. The handpiece of claim 1 wherein said sealing means includes means for interconnecting a source of electrical power and said ultrasonic horn assembly.
4. The handpiece of claim 1 wherein said sealing means includes means to permit flow of aspirated material therethrough.
5. The handpiece of claim 2 wherein said means for coupling further comprising an irrigation tube integral with said sealing means.
6. The handpiece of claim 3 wherein said means for interconnecting a source of electrical power further comprises an electrical cable integral with said sealing means.
7. The handpiece of claim 1, further comprising second sealing means disposed between said second annulus and said body portion of said ultrasonic horn assembly to prevent flow of irrigating fluid within said inner shell.
8. The handpiece of claim 1 wherein said sealing means further comprises a flexible stopper.
9. The handpiece of claim 1 wherein said sealing means includes a stepped configuration to provide a plurality of sealing surfaces.
10. The handpiece of claim 1 wherein said plurality of sealing surfaces include at least a first surface for engaging a portion of said inner shell and a second surface for engaging a portion of said outer shell.
11. The handpiece of claim 4 wherein said means to permit flow of aspirated material therethrough further comprises a passageway through said sealing means.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/764,036 US5178605A (en) | 1991-09-23 | 1991-09-23 | Coaxial flow irrigating and aspirating ultrasonic handpiece |
US764,036 | 1991-09-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2071759A1 true CA2071759A1 (en) | 1993-03-24 |
Family
ID=25069510
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002071759A Abandoned CA2071759A1 (en) | 1991-09-23 | 1992-06-22 | Entitled coaxial flow irrigating and aspirating ultrasonic handpiece |
Country Status (5)
Country | Link |
---|---|
US (1) | US5178605A (en) |
EP (1) | EP0534595A1 (en) |
AU (1) | AU2122992A (en) |
CA (1) | CA2071759A1 (en) |
WO (1) | WO1993005715A1 (en) |
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-
1992
- 1992-06-22 CA CA002071759A patent/CA2071759A1/en not_active Abandoned
- 1992-07-28 EP EP92306880A patent/EP0534595A1/en not_active Withdrawn
- 1992-08-21 AU AU21229/92A patent/AU2122992A/en not_active Abandoned
- 1992-08-25 WO PCT/US1992/007097 patent/WO1993005715A1/en active Search and Examination
Also Published As
Publication number | Publication date |
---|---|
WO1993005715A1 (en) | 1993-04-01 |
AU2122992A (en) | 1993-03-25 |
US5178605A (en) | 1993-01-12 |
EP0534595A1 (en) | 1993-03-31 |
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Legal Events
Date | Code | Title | Description |
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EEER | Examination request | ||
FZDE | Discontinued |