CA2191823C - Bipolar electrosurgical scissors and method of manufacture - Google Patents
Bipolar electrosurgical scissors and method of manufactureInfo
- Publication number
- CA2191823C CA2191823C CA002191823A CA2191823A CA2191823C CA 2191823 C CA2191823 C CA 2191823C CA 002191823 A CA002191823 A CA 002191823A CA 2191823 A CA2191823 A CA 2191823A CA 2191823 C CA2191823 C CA 2191823C
- Authority
- CA
- Canada
- Prior art keywords
- shearing
- exterior surface
- conductive
- scissors
- bipolar
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims description 16
- 238000004519 manufacturing process Methods 0.000 title description 2
- 238000010008 shearing Methods 0.000 claims abstract description 48
- 239000004020 conductor Substances 0.000 claims abstract description 8
- 238000000151 deposition Methods 0.000 claims abstract 2
- 230000001112 coagulating effect Effects 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims 6
- 230000005684 electric field Effects 0.000 claims 3
- 230000000694 effects Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 230000015271 coagulation Effects 0.000 abstract description 2
- 238000005345 coagulation Methods 0.000 abstract description 2
- 238000010030 laminating Methods 0.000 abstract 1
- 150000002500 ions Chemical class 0.000 description 7
- 235000018936 Vitellaria paradoxa Nutrition 0.000 description 4
- 241000282320 Panthera leo Species 0.000 description 2
- 241001136792 Alle Species 0.000 description 1
- 102000018361 Contactin Human genes 0.000 description 1
- 108060003955 Contactin Proteins 0.000 description 1
- CVSVTCORWBXHQV-UHFFFAOYSA-N creatine Chemical compound NC(=[NH2+])N(C)CC([O-])=O CVSVTCORWBXHQV-UHFFFAOYSA-N 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 101150014126 incG gene Proteins 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B18/1442—Probes having pivoting end effectors, e.g. forceps
- A61B18/1445—Probes having pivoting end effectors, e.g. forceps at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/1206—Generators therefor
- A61B2018/1246—Generators therefor characterised by the output polarity
- A61B2018/126—Generators therefor characterised by the output polarity bipolar
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B2018/1405—Electrodes having a specific shape
- A61B2018/1412—Blade
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B2018/1467—Probes or electrodes therefor using more than two electrodes on a single probe
Abstract
A bipolar electrosurgical scissors has an improved coagulation capability.
Both poles of electrosurgical energy are exposed on the exterior surfaces 17 of each shearing member so that the scissors can be used to coagulate tissue using only one shearing member. There may be two or more electrically conductive regions 22 on the exterior surface of each shearing member. The conductive regions 22 may be formed by laminating depositing or inlaying electrically conductive material on the exterior surfaces 17. The conductive regions 22 are electrically insulated from each other. In one embodiment the shearing surfaces 15 are also electrically conductive and are each connected to the same electrical pole. In another embodiment, the conductive material that forms one of the conductive regions 22 on each exterior surface also extends through the shearingmember to also form a conductive shearing surface 15.
Both poles of electrosurgical energy are exposed on the exterior surfaces 17 of each shearing member so that the scissors can be used to coagulate tissue using only one shearing member. There may be two or more electrically conductive regions 22 on the exterior surface of each shearing member. The conductive regions 22 may be formed by laminating depositing or inlaying electrically conductive material on the exterior surfaces 17. The conductive regions 22 are electrically insulated from each other. In one embodiment the shearing surfaces 15 are also electrically conductive and are each connected to the same electrical pole. In another embodiment, the conductive material that forms one of the conductive regions 22 on each exterior surface also extends through the shearingmember to also form a conductive shearing surface 15.
Description
BlPOLAR ELECTROSURGICAL SCISSORS AND
METHOD OF MANUFACTURE
1. Field of the Invention This invention pertains to sur~ical sc;ssors which have a bipolar electrosurgical capability, and more particularly to sc;ssors which incG.~,orale two e'sc:,ical poles on the exlerior surfaces of its shea.i-)~ members in a --an--er that provides for better tissue coagulation.
METHOD OF MANUFACTURE
1. Field of the Invention This invention pertains to sur~ical sc;ssors which have a bipolar electrosurgical capability, and more particularly to sc;ssors which incG.~,orale two e'sc:,ical poles on the exlerior surfaces of its shea.i-)~ members in a --an--er that provides for better tissue coagulation.
2. Backpround of the Disclosure Electrosurgical tools have been characte-i~ed as ,.,onopolar or bipolar.
1~l10nopol-- e~Q t-Gsur~ery refers to a configuration where there is a sepa.ale return electrode cor.necled to the patient, so that only one electrical pole is carried on the a~e_t.Gsurgical tool. In corl.ast, bipolar sls_t-Gsurgery refers to a configuration where both sle l.ic~l poles are carried on the surgical tool. 1~10nopolar and bipolar elQ c t- osurgical tools each offer certain adva, .~agGs and disadvanl&~es to the surgeon.
One of the advanl~ges of --onopc'-- slect-osurgical tools is that the surgeon can apply el~ct-Gsurgical current whenever the conductive portion of the tool is in electrical contacl with the patient. Thus, a surgeon may ope-~le with monopc'--e's t-osurgical tools from many di~rere--l angles. In conl.~sl, bipolar tools suffer from the drawback that the surgeon must carefully pos:lion the tool to ensure that both electrical poles are in electrical contact with the patient in order to apply e'Q l-osurgical current. This may limit the ran~e of motion and the angle from which the surgeon can effectively use the bipolar tool.
Surgical shears, or scissors, have been des;~..ed for use with ele_l.osurgical energy. The combination of scissGrs and ~Isclrosur~ery allows the surgeon to 30 mechan c~l'y cut tissue while coagulating the cut tissue using electrosurgical current.
As the tissue is cut by the shearing surfaces, the cut tissue slides across the exterior surfaces of the sheari--g members where it is coa~ulated. Tissue may also be coagulated while it is being yrasped by the scissors and prior to being mechanically cut. The exterior surfaces are the portions of each shearing member which are 35 exposed when the shearing members are in a mated position. The exterior surfaces are generally opposite the shearing surfaces on each shearing member.
There are several variations of electrosurgical pole placement that allow electrosurgical current to flow through the cut tissue. For example, the exterior surface of one shearin~ member can be energi~ed with a first pole, while the exterior surface of the other shearing member is ener~i~ed with a second pole. In this configuration, ale_t,osur~ical current can flow from one exterior surface, throu~h the cut tissue, to the other exterior surface.
In anotl.er example, both exterior surfaces are ener~iLed with a first pole, while both shearing surfaces are ener~i~Gd with a second pole. In this configuration, ~llect,G3Jr~ical current can flow from each sl-eari"~ surface, through the cut tissue, to an exterior surface. In both of these examples, it should be observed that each exterior surface is ene(~i~ed with only one Glecl-ical pole.
Sur~eons often desire to use the scisso-s to coa~ulate bleeders without cuttin~ tissue. It would be desirable to perform this function with the sheD,in~members in a closed, or mated, position to avoid e- F~ s ~ the shearin~ ed~es. The availability of a coa~u'ation feature on the scissors would avoid the need for asaparate coa~!~'ation tool. The use of a separate coa~'stion tool requires the sur~eon to switch tools in the middle of a procedure. This can be c~""berso",e in laparoscopic procedures.
It would be desirable to allow sur~eons to use the exterior surfaces of the scissors to coa~u'~te tissue. F`n,se. .(ly available scissors have the disadvanta~e that the exterior surfaces can not be easily ",sn ~J'ated for purposes of coa~ulationbecause, as previously dasc,ibed, only one e'ecl,ical pole is eYposed to tissue on each exterior surface. In order to allow current to flow to the tissue, the sur~eon must manipulate the scissors to contact both elcctrical poles to tissuc. Thus, both exterior surfaces must be in contact with the tissue, or aller"alively, an exterior surface and a shearin~ surface must contact tissue. These aller,.dlives do not allow the conven;ence of simply contactin~ one exterior surface to the b'~e~ tissue.
U.S. patent 5,324,289 describes a bipolar surgical shea.ing instrument. One shearin~ member carries a first electrical pole, and a second shearing member carries a second electrical pole. At least one shearing surface and ed~e of the instrument is made from an electrically insulative material. This prevents the shears from creatin~ an electrical short when the two shearin~ members are in con~acl. This design suffers from the drawback that only one electrical pole is exposed on each exterior surface. Thus, both shearing members must be in contact with the tissueof the patient in order to apply electrosurgical current.
2191823`
U.S. patent 5,352 222 dGic-ibss an improved bipolar sur~ical sh&ari.-~instrument. The shearing surfaces and ed~es are metallic, thus improving the sh&afin~ action of the tool. The shearin~ surfaces and ed~es have a layer of electrical insulation which separates them from the eleclrodas. This desi~n also has 5 only one ale l-ical pole eYposed on each exterior surface. As with the previous desi~n both shea- in~ members must be in electrical contact with the tissue in order to apply electrosurgical current.
SUMMARY OF THE INVENTION
10 A bipolar electrosurgical scissors is described which will improve the coa~u~ation ability of elfLt-osur~ical scissors. In particu!ar surgaons will find that the bipolar scissors desc-ibed herein are more easily manipulated for purposes of cofl~ulation while the scissors are in a closed, or mated, confi~uration. The new arran~e",ent of ~Iscerical poles on each sh&arin~ c.--ber of the sc;sso~s will make 15 it possible to hold the tool at many diftere-~t an~les and still provide ele_~,ical contacl with both of the poles.
There are several e---t~-ments of the improved bipolar scisso-,. Each embodiment may be applied to a scissors desi~ned for open sur~ical procedures orto a scissors desi~ned for laparoscc,c~c sur~ical procedures. A laparcsc ~F-C scissors 20 will have the shaari.~g members allached to the distal end of an elo. ~ale support.
In one embodiment each shearin~ ,-,e",ber may be shaped such that the conductive ,-,alerial which forms the shearin~ surface also extends throu~h the body of the shearin~ member to be e~l-osed on its respe- Li-/e exterior surface. Thisexposes a first ~Isct,ical pole on the sh&uin~ surface as well as on the exterior 25 surface of the sl-eari,-g member. A second electrical pole is also eYposed on the exterior surface of the shearing member. This can be accomplished by embeddin~
or depositin~ one or more conductive strips next to the first elscl.ical pole on the exterior surface. The first and second e!e l-ical poles must be electrically insulated from each other to prevent a short circuit. This ar,an~e",ent allows the surgeon to 30 coagulate tissue using the exterior surface of either shearing member. The electrosurgical current flows from the first electrical pole, through the tissue of the patient and then to the second electrical pole.
- 21~I823 An aller, lali~e embodiment has the conductive regions on the exterior surfaces formed by laminatin~ conductive material onto the scissors sh&&rin~
members. The shea.ing members are preferel~ly formed from an ~le t,ically insulative " ,ate, ial such that the conductive re~ions will be insulated from each other.
5 A further aller"d~ e to laminatin~ the conductive ",alerial is to inlay the ",alerial or to vapor dGpGs:l the ",alerial.
BRIEF DESCRIPTION OF THE DRAWINGS
Fi~ure 1 is a side view of one embodiment of a bipolar al~trGsJr~ical scisso~.
Fi~ure 2 i5 a schematic of a front view of a first embodiment of a bipolar ele~t,oour~ical sc;ssors.
Fi~ure 3 is a schematic of a front view of a second embodiment of a bipolar sle_t,oo~Jr~ical scisso,~.
Fi~ure 4 is a sche"-alic of a front view of a third embodiment of a bipolar 15 electrosur~ical scissors.
Fi~ure 5 is a side view of a lapar~scop-~ embodiment of a bipolar electrosur~ical scissors.
DFT~II Fn D~SCRIPTION OF Tl~ INVFNTION
A bipolar scissors 10 has first and second shearin~ me",bers 1 1 and 12, as 20 shown in Fi~ure 1. The shoarin~ members 11 and 12 are connec~ed by a pivotin~joint 13 to allow sc;sso(s-like motion of the sheæri,~ members 1 1 and 12. Each shearin~ member 1 1 and 12 has a distal end 14 and a sheari,~ surface 15 locatedbetween the pivotin~ joint 13 and the distal end 14. The distal ends 14 of the shearin~ members 1 1 and 12 are the ends desi~ned to conlact tissue. Each shaarin~
25 surface 15 is bounded on one side by a cutting ed~e 16.
Each sl-ea,in~ member 11 and 12 also has an exterior surface 17. The exterior surfaces 17 are the portions of each shearing member 1 1 and 12 which are eYrosed when the shea,in~ members 1 1 and 12 are in a closed or mated position.
The exterior surfaces 17 are generally opposile the shearin~ surfaces 15 on each30 shearing member 11 and 12.
In one embodiment the scissors 10 are designed for laparoscop c surgery.
The first and second shearing members 11 and 12 are located at a distal end of an elongate structure 18 as shown in Figure 5. The ~'eu)~ale structure 18 is des;~ned to fit into a cannula and extend the first and second sh~ering members 11 and 12to the oper~ e site of the patient.
Electrical conneclions 19 are located on the scissors 10 for receiv;n~ two poles 20 and 21 of bipolar ~'est-osurgical energy. The ~'eclrGs-Jrgical energy is high-5 frequency electrical energy, and thus the two poles 20 and 21 are referenced as afirst pole 20 and a second pole 21, respe~;~ively. The s'e_~.ical conne.;Lions 19 receive the two poles 20 and 21 from an electrosurgical generalor. The two poles20 and 21 are then conducted to dirrerenl regions on the surgical scissors 10. The ar.angei..e..l of the dirterenl conductive regions 22 makes the bipolar scisso-~ 10 10 more useful to surgeons than previous des;~os. In particular, the conductive regions 22 are positioned on the sheeri-)g members 11 and 12 such that both poles 20 and21 are exposed to tissue on each shearing member 11 and 12, even when the scissors 10 are in a closed position.
In one embodiment, the sheerin~ surfaces 15 are each conductive, as shown 15 in Figure 2. The two ~heE.ing surfaces 15 meet during use, and ll-erefore both shee..ing surfaces 15 are e!e t-ically conne-;ldd to the same pole 20 to avoid an ical ~hort circuit. In this embodiment, the pivoting joint 13 does not need to be electrically insulated.
Each exterior surface 17 has at least two el~..t,ically conductive regions 22 20 which are insulated from each other. Each pole 20 and 21 is electrically connecled to at least one conductive region 22 on each exlerior surface 17. This ar,~n~e.--ent results in both s!e~t.ical poles 20 and 21 bein~ eYI~03Gd on each of the exterior surfaces 17 of the scissors 10. When the surgeon e~l~oses one of the exterior surfaces 17 to tissue, electrical current can flow through the tissue between the 25 conductive regions 17 on that exterior surface 17.
In another embodiment, there are three conductive regions 22 on each exterior surface 17, as shown in Fi~ure 2. One of the conductive regions 22 on each exterior surface 17 extends through the body of its re3peclive shaaring member 11 and 12 to form a conductive region 22 on its lespecli-/e shearing surface 15. Thus, 30 when the first pole 20 is connected to the shearing surface 15, it is also connecled to one of the conductive regions 22 on the exterior surface 17. The other two conductive regions 22 on each exterior surface 17 are electrically con--e~led to the second pole 21.
2~9~823 In the embodiment as shown in Figure 2 certain conductive re~ions each labeled 24 in Fi~ure 2, on each shaarin~ member 11 and 12 are inlayed in the exterior surfaces 17. An insulative layer 23 seporalas the conductive reEI-9ns 22 from each other. The conductive regions 24 are ~le t,ically connecled to the pole 5 21. Other conductive re~ions, labeled 25 in Fi~ure 2, extend throu~h the sl,azring members 11 and 12. The conductive regions 25 are a'~ ically connecled to expose the pole 20 on both the shearin~ surfaces 15 and the exterior surfaces 17.
In the embodiment as shown in Figure 3, the conductive re~ions 22 are laminated on the exterior surfaces 17 and the shearing surfaces 15. In an aller"ali~e 10 embodiment also represGnted by Figure 3 the conductive re~ions are vapor or ion deposited on the exterior surfaces 17 and the shearin~ surfaces 15. In yet anotl,er alle",alive embodiment as shown in Figure 4 the conductive re~ions 22 may be inlayed in the sha&rin~ members 11 and 12. The shearin~ members 11 and 12 in Fi~ure 4 are constructed of an electrically insulative ",alerial.
It is to be unde,a~ood that the above desc,ibed a.,a.-~e",6nts are only illustrative of the application of the principles of the pre30nl invention. Numerous modifications and all~-"ali-~e arrangements may be devised by those skilled in the art without depa,ling from the spirit and scope of the pre3Gnl invention. The appended claims are inlended to cover such modiricalions and ar,~n~ements.
1~l10nopol-- e~Q t-Gsur~ery refers to a configuration where there is a sepa.ale return electrode cor.necled to the patient, so that only one electrical pole is carried on the a~e_t.Gsurgical tool. In corl.ast, bipolar sls_t-Gsurgery refers to a configuration where both sle l.ic~l poles are carried on the surgical tool. 1~10nopolar and bipolar elQ c t- osurgical tools each offer certain adva, .~agGs and disadvanl&~es to the surgeon.
One of the advanl~ges of --onopc'-- slect-osurgical tools is that the surgeon can apply el~ct-Gsurgical current whenever the conductive portion of the tool is in electrical contacl with the patient. Thus, a surgeon may ope-~le with monopc'--e's t-osurgical tools from many di~rere--l angles. In conl.~sl, bipolar tools suffer from the drawback that the surgeon must carefully pos:lion the tool to ensure that both electrical poles are in electrical contact with the patient in order to apply e'Q l-osurgical current. This may limit the ran~e of motion and the angle from which the surgeon can effectively use the bipolar tool.
Surgical shears, or scissors, have been des;~..ed for use with ele_l.osurgical energy. The combination of scissGrs and ~Isclrosur~ery allows the surgeon to 30 mechan c~l'y cut tissue while coagulating the cut tissue using electrosurgical current.
As the tissue is cut by the shearing surfaces, the cut tissue slides across the exterior surfaces of the sheari--g members where it is coa~ulated. Tissue may also be coagulated while it is being yrasped by the scissors and prior to being mechanically cut. The exterior surfaces are the portions of each shearing member which are 35 exposed when the shearing members are in a mated position. The exterior surfaces are generally opposite the shearing surfaces on each shearing member.
There are several variations of electrosurgical pole placement that allow electrosurgical current to flow through the cut tissue. For example, the exterior surface of one shearin~ member can be energi~ed with a first pole, while the exterior surface of the other shearing member is ener~i~ed with a second pole. In this configuration, ale_t,osur~ical current can flow from one exterior surface, throu~h the cut tissue, to the other exterior surface.
In anotl.er example, both exterior surfaces are ener~iLed with a first pole, while both shearing surfaces are ener~i~Gd with a second pole. In this configuration, ~llect,G3Jr~ical current can flow from each sl-eari"~ surface, through the cut tissue, to an exterior surface. In both of these examples, it should be observed that each exterior surface is ene(~i~ed with only one Glecl-ical pole.
Sur~eons often desire to use the scisso-s to coa~ulate bleeders without cuttin~ tissue. It would be desirable to perform this function with the sheD,in~members in a closed, or mated, position to avoid e- F~ s ~ the shearin~ ed~es. The availability of a coa~u'ation feature on the scissors would avoid the need for asaparate coa~!~'ation tool. The use of a separate coa~'stion tool requires the sur~eon to switch tools in the middle of a procedure. This can be c~""berso",e in laparoscopic procedures.
It would be desirable to allow sur~eons to use the exterior surfaces of the scissors to coa~u'~te tissue. F`n,se. .(ly available scissors have the disadvanta~e that the exterior surfaces can not be easily ",sn ~J'ated for purposes of coa~ulationbecause, as previously dasc,ibed, only one e'ecl,ical pole is eYposed to tissue on each exterior surface. In order to allow current to flow to the tissue, the sur~eon must manipulate the scissors to contact both elcctrical poles to tissuc. Thus, both exterior surfaces must be in contact with the tissue, or aller"alively, an exterior surface and a shearin~ surface must contact tissue. These aller,.dlives do not allow the conven;ence of simply contactin~ one exterior surface to the b'~e~ tissue.
U.S. patent 5,324,289 describes a bipolar surgical shea.ing instrument. One shearin~ member carries a first electrical pole, and a second shearing member carries a second electrical pole. At least one shearing surface and ed~e of the instrument is made from an electrically insulative material. This prevents the shears from creatin~ an electrical short when the two shearin~ members are in con~acl. This design suffers from the drawback that only one electrical pole is exposed on each exterior surface. Thus, both shearing members must be in contact with the tissueof the patient in order to apply electrosurgical current.
2191823`
U.S. patent 5,352 222 dGic-ibss an improved bipolar sur~ical sh&ari.-~instrument. The shearing surfaces and ed~es are metallic, thus improving the sh&afin~ action of the tool. The shearin~ surfaces and ed~es have a layer of electrical insulation which separates them from the eleclrodas. This desi~n also has 5 only one ale l-ical pole eYposed on each exterior surface. As with the previous desi~n both shea- in~ members must be in electrical contact with the tissue in order to apply electrosurgical current.
SUMMARY OF THE INVENTION
10 A bipolar electrosurgical scissors is described which will improve the coa~u~ation ability of elfLt-osur~ical scissors. In particu!ar surgaons will find that the bipolar scissors desc-ibed herein are more easily manipulated for purposes of cofl~ulation while the scissors are in a closed, or mated, confi~uration. The new arran~e",ent of ~Iscerical poles on each sh&arin~ c.--ber of the sc;sso~s will make 15 it possible to hold the tool at many diftere-~t an~les and still provide ele_~,ical contacl with both of the poles.
There are several e---t~-ments of the improved bipolar scisso-,. Each embodiment may be applied to a scissors desi~ned for open sur~ical procedures orto a scissors desi~ned for laparoscc,c~c sur~ical procedures. A laparcsc ~F-C scissors 20 will have the shaari.~g members allached to the distal end of an elo. ~ale support.
In one embodiment each shearin~ ,-,e",ber may be shaped such that the conductive ,-,alerial which forms the shearin~ surface also extends throu~h the body of the shearin~ member to be e~l-osed on its respe- Li-/e exterior surface. Thisexposes a first ~Isct,ical pole on the sh&uin~ surface as well as on the exterior 25 surface of the sl-eari,-g member. A second electrical pole is also eYposed on the exterior surface of the shearing member. This can be accomplished by embeddin~
or depositin~ one or more conductive strips next to the first elscl.ical pole on the exterior surface. The first and second e!e l-ical poles must be electrically insulated from each other to prevent a short circuit. This ar,an~e",ent allows the surgeon to 30 coagulate tissue using the exterior surface of either shearing member. The electrosurgical current flows from the first electrical pole, through the tissue of the patient and then to the second electrical pole.
- 21~I823 An aller, lali~e embodiment has the conductive regions on the exterior surfaces formed by laminatin~ conductive material onto the scissors sh&&rin~
members. The shea.ing members are preferel~ly formed from an ~le t,ically insulative " ,ate, ial such that the conductive re~ions will be insulated from each other.
5 A further aller"d~ e to laminatin~ the conductive ",alerial is to inlay the ",alerial or to vapor dGpGs:l the ",alerial.
BRIEF DESCRIPTION OF THE DRAWINGS
Fi~ure 1 is a side view of one embodiment of a bipolar al~trGsJr~ical scisso~.
Fi~ure 2 i5 a schematic of a front view of a first embodiment of a bipolar ele~t,oour~ical sc;ssors.
Fi~ure 3 is a schematic of a front view of a second embodiment of a bipolar sle_t,oo~Jr~ical scisso,~.
Fi~ure 4 is a sche"-alic of a front view of a third embodiment of a bipolar 15 electrosur~ical scissors.
Fi~ure 5 is a side view of a lapar~scop-~ embodiment of a bipolar electrosur~ical scissors.
DFT~II Fn D~SCRIPTION OF Tl~ INVFNTION
A bipolar scissors 10 has first and second shearin~ me",bers 1 1 and 12, as 20 shown in Fi~ure 1. The shoarin~ members 11 and 12 are connec~ed by a pivotin~joint 13 to allow sc;sso(s-like motion of the sheæri,~ members 1 1 and 12. Each shearin~ member 1 1 and 12 has a distal end 14 and a sheari,~ surface 15 locatedbetween the pivotin~ joint 13 and the distal end 14. The distal ends 14 of the shearin~ members 1 1 and 12 are the ends desi~ned to conlact tissue. Each shaarin~
25 surface 15 is bounded on one side by a cutting ed~e 16.
Each sl-ea,in~ member 11 and 12 also has an exterior surface 17. The exterior surfaces 17 are the portions of each shearing member 1 1 and 12 which are eYrosed when the shea,in~ members 1 1 and 12 are in a closed or mated position.
The exterior surfaces 17 are generally opposile the shearin~ surfaces 15 on each30 shearing member 11 and 12.
In one embodiment the scissors 10 are designed for laparoscop c surgery.
The first and second shearing members 11 and 12 are located at a distal end of an elongate structure 18 as shown in Figure 5. The ~'eu)~ale structure 18 is des;~ned to fit into a cannula and extend the first and second sh~ering members 11 and 12to the oper~ e site of the patient.
Electrical conneclions 19 are located on the scissors 10 for receiv;n~ two poles 20 and 21 of bipolar ~'est-osurgical energy. The ~'eclrGs-Jrgical energy is high-5 frequency electrical energy, and thus the two poles 20 and 21 are referenced as afirst pole 20 and a second pole 21, respe~;~ively. The s'e_~.ical conne.;Lions 19 receive the two poles 20 and 21 from an electrosurgical generalor. The two poles20 and 21 are then conducted to dirrerenl regions on the surgical scissors 10. The ar.angei..e..l of the dirterenl conductive regions 22 makes the bipolar scisso-~ 10 10 more useful to surgeons than previous des;~os. In particular, the conductive regions 22 are positioned on the sheeri-)g members 11 and 12 such that both poles 20 and21 are exposed to tissue on each shearing member 11 and 12, even when the scissors 10 are in a closed position.
In one embodiment, the sheerin~ surfaces 15 are each conductive, as shown 15 in Figure 2. The two ~heE.ing surfaces 15 meet during use, and ll-erefore both shee..ing surfaces 15 are e!e t-ically conne-;ldd to the same pole 20 to avoid an ical ~hort circuit. In this embodiment, the pivoting joint 13 does not need to be electrically insulated.
Each exterior surface 17 has at least two el~..t,ically conductive regions 22 20 which are insulated from each other. Each pole 20 and 21 is electrically connecled to at least one conductive region 22 on each exlerior surface 17. This ar,~n~e.--ent results in both s!e~t.ical poles 20 and 21 bein~ eYI~03Gd on each of the exterior surfaces 17 of the scissors 10. When the surgeon e~l~oses one of the exterior surfaces 17 to tissue, electrical current can flow through the tissue between the 25 conductive regions 17 on that exterior surface 17.
In another embodiment, there are three conductive regions 22 on each exterior surface 17, as shown in Fi~ure 2. One of the conductive regions 22 on each exterior surface 17 extends through the body of its re3peclive shaaring member 11 and 12 to form a conductive region 22 on its lespecli-/e shearing surface 15. Thus, 30 when the first pole 20 is connected to the shearing surface 15, it is also connecled to one of the conductive regions 22 on the exterior surface 17. The other two conductive regions 22 on each exterior surface 17 are electrically con--e~led to the second pole 21.
2~9~823 In the embodiment as shown in Figure 2 certain conductive re~ions each labeled 24 in Fi~ure 2, on each shaarin~ member 11 and 12 are inlayed in the exterior surfaces 17. An insulative layer 23 seporalas the conductive reEI-9ns 22 from each other. The conductive regions 24 are ~le t,ically connecled to the pole 5 21. Other conductive re~ions, labeled 25 in Fi~ure 2, extend throu~h the sl,azring members 11 and 12. The conductive regions 25 are a'~ ically connecled to expose the pole 20 on both the shearin~ surfaces 15 and the exterior surfaces 17.
In the embodiment as shown in Figure 3, the conductive re~ions 22 are laminated on the exterior surfaces 17 and the shearing surfaces 15. In an aller"ali~e 10 embodiment also represGnted by Figure 3 the conductive re~ions are vapor or ion deposited on the exterior surfaces 17 and the shearin~ surfaces 15. In yet anotl,er alle",alive embodiment as shown in Figure 4 the conductive re~ions 22 may be inlayed in the sha&rin~ members 11 and 12. The shearin~ members 11 and 12 in Fi~ure 4 are constructed of an electrically insulative ",alerial.
It is to be unde,a~ood that the above desc,ibed a.,a.-~e",6nts are only illustrative of the application of the principles of the pre30nl invention. Numerous modifications and all~-"ali-~e arrangements may be devised by those skilled in the art without depa,ling from the spirit and scope of the pre3Gnl invention. The appended claims are inlended to cover such modiricalions and ar,~n~ements.
Claims (19)
1. A bipolar electrosurgical scissors comprising:
first and second shearing members and each shearing member having a distal end a pivoting joint connecting the first and second shearing members and;
a shearing surface on each shearing member located along the shearing member between the pivoting joint and the respective distal end;
electrical connections on the scissors for receiving two poles and of bipolar electrosurgical energy, and an exterior surface on each of the first and second shearing members and, each exterior surface located generally opposite its respective shearing surface, each exterior surface having at least two exposed electrically conductive regions which are insulated from each other, wherein each pole is electrically connected to at least one conductive region on each exterior surface.
first and second shearing members and each shearing member having a distal end a pivoting joint connecting the first and second shearing members and;
a shearing surface on each shearing member located along the shearing member between the pivoting joint and the respective distal end;
electrical connections on the scissors for receiving two poles and of bipolar electrosurgical energy, and an exterior surface on each of the first and second shearing members and, each exterior surface located generally opposite its respective shearing surface, each exterior surface having at least two exposed electrically conductive regions which are insulated from each other, wherein each pole is electrically connected to at least one conductive region on each exterior surface.
2. The bipolar scissors of Claim 1 wherein the shearing surfaces are electrically conductive and are electrically connected to the same pole such that there is no substantial electrical potential between the shearing surfaces.
3. The bipolar scissors of Claim 1 wherein there are three conductive regions on each exterior surface.
4. The bipolar scissors of Claim 3 wherein one of the conductive regions on each exterior surface is electrically connected to the same pole as the shearing surfaces.
5. The bipolar scissors of Claim 1 wherein one of the conductive regions on each exterior surface extends through its respective shearing member to also form the shearing surface.
6. The bipolar scissors of Claim 1 wherein the conductive regions comprise a laminated electrically conductive material on an insulative substrate.
7. The bipolar scissors of Claim 1 wherein the conductive regions comprise an inlayed electrically conductive material in an insulative substrate.
8. The bipolar scissors of Claim 1 wherein the conductive regions comprise an electrically conductive deposit on an insulative substrate.
9. The bipolar scissors of Claim 1 wherein the shearing members are connected to an elongate shaft for insertion through a cannula.
10. A method for constructing bipolar scissors having two shearing members, each shearing member having a shearing surface and an exterior surface located generally on the opposite side thereof, each exterior surface having at least first and second electrically conductive regions which are electrically insulated from each other, the method comprising the steps of:
connecting each shearing surface to a first electrical pole;
connecting the first conductive region on each exterior surface to the first electrical pole, and connecting the second conductive region on each exterior surface to a second electrical pole.
connecting each shearing surface to a first electrical pole;
connecting the first conductive region on each exterior surface to the first electrical pole, and connecting the second conductive region on each exterior surface to a second electrical pole.
11. The method of Claim 10 further comprising the step of forming the conductive regions by laminated electrically conductive material on an insulative substrate.
12. The method of Claim 10 further comprising the step of forming the conductive regions by inlaying electrically conductive material in an insulative substrate.
13. The method of Claim 10 further comprising the step of forming the conductive regions by depositing electrically conductive material on an insulative substrate.
14. The method of Claim 10 further comprising the step of pivoting the shearing members with respect to each other on a conductive pin.
15. A method of providing a bipolar electrosurgical effect on the exterior surface of a shearing member comprising the following steps:
supplying a first pole of electrosurgical energy to a first conductive region on the exterior of the shearing member;
supplying a second pole of electrosurgical energy to a second conductive region on the exterior of the shearing member;
insulating the first conductive region from the second conductive region, and establishing an electrical field between the first and second conductive regions.
supplying a first pole of electrosurgical energy to a first conductive region on the exterior of the shearing member;
supplying a second pole of electrosurgical energy to a second conductive region on the exterior of the shearing member;
insulating the first conductive region from the second conductive region, and establishing an electrical field between the first and second conductive regions.
16. The method of Claim 15 further comprising the steps of treating tissue within the electrical field.
17. The method of Claim 15 further comprising the step of establishing electrical current flow through the tissue of the patient and between the first and second conductive regions.
18. The method of Claim 15 further comprising the step of positioning the electrical field by directing the exterior surface of the shearing member.
19. Use of bipolar electrosurgical scissors of any one of claims 1 to 9 in coagulating tissue.
Applications Claiming Priority (2)
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US08/566,560 | 1995-12-04 | ||
US08/566,560 US5658281A (en) | 1995-12-04 | 1995-12-04 | Bipolar electrosurgical scissors and method of manufacture |
Publications (2)
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CA2191823A1 CA2191823A1 (en) | 1997-06-05 |
CA2191823C true CA2191823C (en) | 1999-05-04 |
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Application Number | Title | Priority Date | Filing Date |
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CA002191823A Expired - Fee Related CA2191823C (en) | 1995-12-04 | 1996-12-02 | Bipolar electrosurgical scissors and method of manufacture |
Country Status (4)
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US (1) | US5658281A (en) |
JP (1) | JPH09173347A (en) |
CA (1) | CA2191823C (en) |
DE (1) | DE19650150C2 (en) |
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-
1995
- 1995-12-04 US US08/566,560 patent/US5658281A/en not_active Expired - Lifetime
-
1996
- 1996-12-02 CA CA002191823A patent/CA2191823C/en not_active Expired - Fee Related
- 1996-12-03 DE DE19650150A patent/DE19650150C2/en not_active Expired - Fee Related
- 1996-12-04 JP JP8324318A patent/JPH09173347A/en active Pending
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JPH09173347A (en) | 1997-07-08 |
DE19650150C2 (en) | 2000-01-20 |
DE19650150A1 (en) | 1997-06-05 |
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