USRE36795E - Surgical scissors with bipolar coagulation feature - Google Patents
Surgical scissors with bipolar coagulation feature Download PDFInfo
- Publication number
- USRE36795E USRE36795E US08/724,997 US72499796A USRE36795E US RE36795 E USRE36795 E US RE36795E US 72499796 A US72499796 A US 72499796A US RE36795 E USRE36795 E US RE36795E
- Authority
- US
- United States
- Prior art keywords
- blade
- blade members
- metal
- bipolar electrosurgical
- iaddend
- 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 - Lifetime
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Images
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
- A61B18/14—Probes or electrodes therefor
- A61B18/1402—Probes for open surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00831—Material properties
- A61B2017/0088—Material properties ceramic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
- A61B2017/2926—Details of heads or jaws
- A61B2017/2945—Curved jaws
-
- 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
- A61B2018/00053—Mechanical features of the instrument of device
- A61B2018/00059—Material properties
- A61B2018/00071—Electrical conductivity
- A61B2018/00083—Electrical conductivity low, i.e. electrically insulating
-
- 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
- A61B2018/00053—Mechanical features of the instrument of device
- A61B2018/00107—Coatings on the energy applicator
-
- 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
- A61B2018/1405—Electrodes having a specific shape
- A61B2018/1425—Needle
- A61B2018/1432—Needle curved
Definitions
- 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.
- 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 remote conductive body-plate
- bipolar closely-spaced conductive electrode
- 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.
- scissors-type instrument for mechanically snipping tissue during the course of an endoscopic procedure.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- FIG. 1 is a perspective view of an endoscopic electrosurgical scissors constructed in accordance with the present invention.
- FIG. 2 is a greatly enlarged top view of the distal end portion of the scissors of FIG. 1.
- 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).
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- the RF voltage is applied to the electrosurgical scissors, thereby making the blade supports the active bipolar electrodes.
- 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.
Abstract
Description
Claims (20)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/724,997 USRE36795E (en) | 1994-03-15 | 1996-10-03 | Surgical scissors with bipolar coagulation feature |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/213,671 US5352222A (en) | 1994-03-15 | 1994-03-15 | Surgical scissors with bipolar coagulation feature |
US08/724,997 USRE36795E (en) | 1994-03-15 | 1996-10-03 | Surgical scissors with bipolar coagulation feature |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/213,671 Reissue US5352222A (en) | 1994-03-15 | 1994-03-15 | Surgical scissors with bipolar coagulation feature |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE36795E true USRE36795E (en) | 2000-07-25 |
Family
ID=22796036
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/213,671 Ceased US5352222A (en) | 1994-03-15 | 1994-03-15 | Surgical scissors with bipolar coagulation feature |
US08/724,997 Expired - Lifetime USRE36795E (en) | 1994-03-15 | 1996-10-03 | Surgical scissors with bipolar coagulation feature |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/213,671 Ceased US5352222A (en) | 1994-03-15 | 1994-03-15 | Surgical scissors with bipolar coagulation feature |
Country Status (1)
Country | Link |
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US (2) | US5352222A (en) |
Cited By (145)
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US6358268B1 (en) | 2000-03-06 | 2002-03-19 | Robert B. Hunt | Surgical instrument |
US6387094B1 (en) * | 1998-10-30 | 2002-05-14 | Karl Storz Gmbh & Co. Kg | Medical instrument for dissecting tissue |
US6447511B1 (en) | 1994-12-13 | 2002-09-10 | Symbiosis Corporation | Bipolar endoscopic surgical scissor blades and instrument incorporating the same |
US6451018B1 (en) | 1997-11-14 | 2002-09-17 | Sherwood Services Ag | Laparoscopic bipolar electrosurgical instrument |
US6464704B2 (en) | 1997-11-12 | 2002-10-15 | Sherwood Services Ag | Bipolar electrosurgical instrument with replaceable electrodes |
US6506208B2 (en) | 2000-03-06 | 2003-01-14 | Robert B. Hunt | Surgical instrument |
US6511480B1 (en) | 1998-10-23 | 2003-01-28 | Sherwood Services Ag | Open vessel sealing forceps with disposable electrodes |
US6682528B2 (en) | 1998-10-23 | 2004-01-27 | Sherwood Services Ag | Endoscopic bipolar electrosurgical forceps |
US6726686B2 (en) | 1997-11-12 | 2004-04-27 | Sherwood Services Ag | Bipolar electrosurgical instrument for sealing vessels |
USD499181S1 (en) | 2003-05-15 | 2004-11-30 | Sherwood Services Ag | Handle for a vessel sealer and divider |
US20050043758A1 (en) * | 2003-08-18 | 2005-02-24 | Scimed Life Systems, Inc. | Endoscopic medical instrument and related methods of use |
US20050101965A1 (en) * | 1997-09-09 | 2005-05-12 | Sherwood Services Ag | Apparatus and method for sealing and cutting tissue |
US20070244497A1 (en) * | 2003-11-05 | 2007-10-18 | Applied Medical Resources Corporation | Laparoscopic scissor blades |
US20080167651A1 (en) * | 1998-10-23 | 2008-07-10 | Tetzlaff Philip M | Vessel sealing instrument |
US20090281561A1 (en) * | 2008-05-09 | 2009-11-12 | Applied Medical Resources Corporation | Laparoscopic scissors |
US7655007B2 (en) | 2003-05-01 | 2010-02-02 | Covidien Ag | Method of fusing biomaterials with radiofrequency energy |
US20100057071A1 (en) * | 2008-08-26 | 2010-03-04 | Francis Amoah | Electrosurgical instrument and system |
US7686804B2 (en) | 2005-01-14 | 2010-03-30 | Covidien Ag | Vessel sealer and divider with rotating sealer and cutter |
US7686827B2 (en) | 2004-10-21 | 2010-03-30 | Covidien Ag | Magnetic closure mechanism for hemostat |
US20100094287A1 (en) * | 2008-10-09 | 2010-04-15 | Tyco Heathcare Group Lp | Apparatus, System, and Method for Performing an Endoscopic Electrosurgical Procedure |
US7708735B2 (en) | 2003-05-01 | 2010-05-04 | Covidien Ag | Incorporating rapid cooling in tissue fusion heating processes |
US7744615B2 (en) | 2006-07-18 | 2010-06-29 | Covidien Ag | Apparatus and method for transecting tissue on a bipolar vessel sealing instrument |
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US7771425B2 (en) | 2003-06-13 | 2010-08-10 | Covidien Ag | Vessel sealer and divider having a variable jaw clamping mechanism |
US7776037B2 (en) | 2006-07-07 | 2010-08-17 | Covidien Ag | System and method for controlling electrode gap during tissue sealing |
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US20100312240A1 (en) * | 2009-06-05 | 2010-12-09 | Microline Surgical Inc. | Scissor tip for bipolar high frequency endoscope |
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