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Publication numberUS3685518 A
Publication typeGrant
Publication dateAug 22, 1972
Filing dateJul 29, 1970
Priority dateJul 29, 1970
Publication numberUS 3685518 A, US 3685518A, US-A-3685518, US3685518 A, US3685518A
InventorsBeuerle Herbert, Haberlen Roland
Original AssigneeAesculap Werke Ag
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Surgical instrument for high-frequency surgery
US 3685518 A
Abstract
Surgical forceps or a similar instrument to be employed in HF surgery for coagulating tissue by means of HF currents in which at least the terminal parts of the jaws of the instrument which are adapted to clamp the tissue are designed so as to prevent them from overheating the tissue when an HF current is conducted to said instrument.
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Description  (OCR text may contain errors)

United States Patent Beuerle et al.

[ 1 SURGICAL INSTRUMENT FOR HIGH- FREQUENCY SURGERY [72] Inventors: Herbert Beuerle; Roland l-laberlen,

both of Tuttlingen, Germany [73] Assignee: AESCULAP-WERKE A.G. vormals Jetter & Scheerer, Tuttlingen, Germany [22] Filed: July 29, 1970 [21] App1.No.: 58,826

[52] US. Cl. ..l28/303.l7, 128/321, 128/354 [51] Int. Cl. .....A61b 17/36, A61n 3/00, A6lb 17/30 [58] Field of Search ..128/303.17, 321, 322, 354

[56] References Cited UNITED STATES PATENTS 3,100,489 8/ 1963 Bagley ..128/354 X 3,209,753 10/1965 Hawkins et a1. 128/321 1,071,978 [0000 White ..128/354 X [15] 3,685,518 1 1 Aug. 22, 1972 FOREIGN PATENTS OR APPLICATIONS 138,672 7/1955 U.S.S.R. ..128/303.l7 1,803,292 5/1970 Germany ..128/303.17

OTHER PUBLICATIONS Jaros, Joseph F., MD, Electrocoagulation of Tur binates. ln Archives of Physical Therapy, Xray, Radium Vol. XIV, Sept. 1933 pp. 533- 535.

Primary Examiner-Channing L. Pace Attorney-Arthur O. Klein [57] ABSTRACT Surgical forceps or a similar instrument to be employed in HF surgery for coagulating tissue by means of HF currents in which at least the terminal parts of the jaws of the instrument which are adapted to clamp the-tissue are designed so as to prevent them from overheating the tissue when an HF current is conducted to said instrument.

9 Claims, 3 Drawing Figures SURGICAL INSTRUMENT FOR HIGH- FREQUENCY SURGERY The present invention relates to a surgical instrument, especially in the form of surgical forceps, which is to be employed in surgical operations by means of high-frequency currents and comprises a pair of jaws for clamping the tissue which is to be coagulated.

When employing surgical instruments in highfrequency or HF surgery, and especially when using surgical forceps in carrying out a bipolar coagulation, it often occurs that one of the jaws of the instrument will continue to adhere or stick to the coagulated tissue. This sticking of the tissue to the jaws of the forceps is especially dangerous in neuro-microsurgical operations. When coagulating, for example, an aneurysm, such sticking of the tissue to the jaws of the forceps may cause the coagulated place to be torn so that a brain hemorrhage might result which cannot be stopped and might even lead to the death of the patient.

It is the object of the present invention to provide a surgical instrument for high-frequency surgery, especially in the form of surgical forceps, which avoids such sticking of the jaws of the instrument to the coagulated tissue as much as possible.

Although all of the causes of such sticking of the jaws of the instrument to the coagulated tissue have not as yet been definitely determined, the present inventors have found that such sticking is due to a local overheating of the parts of the clamped tissue which are clamped by these jaws. Consequently, for attaining the above mentioned object, the inventors undertook to eliminate the cause for such local overheating adjacent to the jaws of the surgical forceps or similar instrument.

For carrying out this invention, each of two different measures may be undertaken either alone or in conjunction with each other. One of these measures consists according to the invention in rounding off the edges of the terminal surfaces of the jaws of the instrument which are to come in contact with the tissue so that, when the tissue is being clamped between the jaws, the surface pressure of the jaws upon the tissue will not substantially increase but rather decrease toward these edges. The second-measure which may be undertaken either alone or in conjunction with the first measure consists in making at least the surfaces of the jaws which are to come in contact with the tissue to be coagulated of a material which has a better thermal and electric conductivity than steel.

By rounding off the edges of the terminal surfaces of the forceps or similar instrument which are to engage with the tissue to be coagulated, the entire surface of this tissue which is in direct engagement with the jaw surfaces will be subjected to a substantially uniform surface pressure which has the result that the electric contact resistance which is then produced will also be uniform along these surfaces. Therefore, the invention prevents the high current density which occurs on the usual relatively sharp edges of the jaws of the conventional surgical forceps or similar instruments and it thus prevents the local overheating of the tissue parts at and directly adjacent to these edges.

The second feature of the invention that at least the jaws of the surgical instrument consist of a material which has a better thermal and electric conductivity than steel has the result that the heat which is produced for the coagulation will be dissipated from the tissue immediately after the coagulation by the highly heatconductive jaws. By making the jaws of theinstrument also of a material which has a better electric conductivity than steel, the further advantage is attained that these jaws will be heated considerably less by the electric current and therefore have a lower temperature which, in turn, means that the heat will also be quickly dissipated from the points of contact between the jaws and the tissue.

Since by making at least the contact surfaces of the jaws of the surgical instrument which are to engage with the tissue to be coagulated ofa material which has a higher thermal and electric conductivity than steel,

the heat will also be better dissipated from the edges of the jaws, it will be of advantage to apply this feature of the invention also to surgical forceps or similar instruments the jaws of which have the conventional sharp edges.

The features and advantages of the present invention will become more clearly apparent from the following detailed description thereof, which is to be read with reference to the accompanying drawings, in which FIG. 1 shows, partly broken away, a side-view of a pair of surgical forceps for high-frequency surgery; while FIG. 2 and 3 show cross sections which are taken along the lines II ll and III III of FIG. 1, respectively.

The surgical forceps as illustrated in the drawings which are intended for use in high-frequency surgery comprise a pair of arms 1 and 2 which are electrically insulated from each other and connected to each other near their rear ends by an insulator 3. The two arms 1 and 2 of the forceps consist of a high-grade steel and may be connected in a conventional manner to the output electrodes of a high-frequency generator, not shown.

By means of rivets 6, a pair of jaws 4 and 5 are secured to the front ends of the two arms 1 and 2. These jaws 4 and 5 consist of a material which has a higher thermal and electric conductivitythan steel. A material which is suitable for this purpose may be, for example, silver or an alloy of silver, for example, with gold, copper, palladium, cadmium, cadmium oxide or nickel.

As illustrated in FIG. 3, the longitudinal edges 7 of the jaws 4 and 5 are rounded so as to have a radius of curvature R which preferably amounts to at least one tenth of the width b of the jaws at a point which is spaced at a distance d of 3 mm from the tips 10 of the aws.

By making the jaws 4 and 5 of a thermally and electrically highly conductive material, the present invention attains the advantage that the heat which is produced in the tissue when being coagulated by a high-frequency current will be immediately dissipated by the heat-conductive jaws 4 and 5 as soon as the coagulation has been effected. The high conductivity of the jaws 4 and 5 has the further advantage that these jaws will be heated very little, if at all, by the electric high-frequency current which is required for the coagulation and that during the coagulation the jaws 4 and 5 themselves have a low temperature and therefore serve for the additional purpose of quickly dissipating the heat from the coagulated tissue.

I theiforceps are opened and withdrawn.

,rounded, the edges of the terminal surfaces 8 of the jaws which are provided for coming in contact with the tissue are likewise rounded, as may be clearly seen in FIG. 3. This has the result that at the position where the tissue, for example, the blood vessel 9, is to be coagulated,'the surface of the latter will be subjected by the entire surface 8 of jaws 4 and 5 which comes in contact with the tissue to a substantially uniform surface pressure the strength of which decreases rather than increases in the direction toward the outer edges of the surface 8. This, in turn, has the result that an electric contact resistance will be produced which is uniform at all points of contact between the entire surface 8 of the jaws 4 and 5 and the tissue to be coagulated, for example, the blood vessel 9. Due to the fact that the edges 7 of the jaw surfaces 8 of the forceps as illustrated are rounded, the current density will therefore be substan-- tially equal at all of these points so that no overheating of the tissue will occur at any point 'andthe tissue cannot stick to either of the jaws4 or 5 and betorn when If both of the features of the invention'as previously material may be, for example, beryllium bronze or phosphor bronze. I

Although our invention has been illustrated and described with reference to the preferred embodiments thereof, we wish to have it understood that it is in no 7 way limited to the details of such embodiments but is capable of numerous modifications within the scopeof the appended claims.

Having thus fully disclosed our invention, what we ffi ri'a surgical instrument adapted to be used in high-frequency surgery, said instrument having a pair of electrically conductive elongated jaw members with spaced terminals for clamping tissue to be coagulated, said jaw members being connected remote from the terminals to an insulating member, means to connect the jaw members to the output of a high-frequency generator, the improvement which comprises as a means for preventing said tissue from being overheated by said terminals when high-frequency current is conducted to said terminals, said surfaces of said terminals have rounded edges so that, when the tissue is clamped by said terminals at said rounded edges, a high current described, that is, the construction of the jaws 4 and 5 of the surgical forceps or similar instrument of a material of a high thermal and electric conductivity and the rounding of the edges of the jaw surfaces 8, are applied together, an overheating of the coagulated tissue may be avoided with great certainty.

While the jaws 4 and 5 of the forceps as illustrated in the drawings are made entirely of the same thermally and electrically highly conductive material, the good conductivity of the parts of a surgical instrument which form the surfaces with which this instrument comes in contact with the tissue to be coagulated may also be attained by merely applying a thermally and electrically highly conductive coating upon the outer surface of the instrument which otherwise consists of a material of a lower conductivity. This may be attained, for example, by making each of the two arms 1 and 2 and the associated jaw 4 or 5' of the forceps or other surgical instrument internally of one piece of material which is provided with a coating of a thermally and electrically highly conductive material. Thus, for example, the

arms 'of the forceps may consist of steel which is coated with a layer of silver or an alloy of silver with gold, copper, palladium, cadmium, cadmium oxide or nickel. instead of employing steel as the basic material of the instrument, it is, of course, also possible to employ any other suitable material, for example, one which has a better thermal and electric conductivity.

If the costs of the instrument are of no importance, it is most advisable to' make the entire instrument of a material which has a good thermal and electric conductivity, while the other properties of this material are as equal as possible to those of a high-grade steel. Such a density is prevented. I

2. A surgical instrument as defined in claim 1, in which at least the surfaces of said terminals which are adapted to engage with the tissue to be coagulated consist of a material having a higher thermal and electric conductivity than steel.

3. A surgical instrument as defined in claim 2, in

which said material consists of a mixture of silver and cadmium oxide.

4. A surgical instrument as defined in claim 1, in which at least said surfaces of said terminals consist of a material having a higher thermal and electric conductivity than steel.

5. A surgical instrument as defined in claim 1, in

which said edges have a radius of curvature amounting to at least one-tenth of the width of said terminalsat which all of the thermally and electrically conductive parts of said instrument including said surfaces consist of at least one material having a higher thermal and electric conductivity than steel.

9. A surgical instrument as defined in claim 8, in which all of said thermally and electrically conductive parts of said instrument consist of bronze.

Patent No. 3, 5,51 v Dated August 22, 1972 HERBERT BEUERLE ET AL Inventor(s) It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

On the cover sheet insert:

- [30] FOREIGN APPLICATION PRIORITY DATA February 11, 1970 Germany. .P 20 06 126.1 --Q Signed and sealed this 15th day of May 1973.

(SEAL) Attest:

EDWARD M.FLETCHER,JR. I ROBERT GOTTSCHALK Attesting Officer Commissioner of Patents FORM PC4050 (m'ss) USCOMM-DC come-ps9 UISI GOVERNMENT PRINTING OFFICE 2 IQQ 35"33"

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1071978 *Sep 2, 1913 Device for removing hairs.
US3100489 *Sep 30, 1957Aug 13, 1963Medtronic IncCautery device
US3209753 *May 4, 1962Oct 5, 1965Hanna Jay SIntestinal clamps and the like
DE1803292A1 *Oct 16, 1968May 14, 1970Fischer Fa F LKoagulationsinstrument
SU138672A * Title not available
Non-Patent Citations
Reference
1 *Jaros, Joseph F., M.D., Electrocoagulation of Turbinates. In Archives of Physical Therapy, X ray, Radium Vol. XIV, Sept. 1933 pp. 533 535.
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3886944 *Nov 19, 1973Jun 3, 1975Jamshidi KhosrowMicrocautery device
US3902494 *Apr 30, 1974Sep 2, 1975ScheererSuction surgical instrument
US4074718 *Mar 17, 1976Feb 21, 1978Valleylab, Inc.Electrosurgical instrument
US4137919 *Aug 29, 1977Feb 6, 1979Erbe Elektromedizin KgElectromedical clip structure
US4202336 *Jan 3, 1978May 13, 1980Erbe Elektromedizin KgCauterizing probes for cryosurgery
US4202337 *Jun 14, 1977May 13, 1980Concept, Inc.Bipolar electrosurgical knife
US4353371 *Sep 24, 1980Oct 12, 1982Cosman Eric RLongitudinally, side-biting, bipolar coagulating, surgical instrument
US4449528 *Jul 20, 1981May 22, 1984University Of WashingtonFast pulse thermal cautery probe and method
US4485810 *Oct 28, 1980Dec 4, 1984Oximetrix, Inc.Surgical cutting blade
US4492231 *Sep 17, 1982Jan 8, 1985Auth David CNon-sticking electrocautery system and forceps
US4622966 *Jul 16, 1984Nov 18, 1986Abbott LaboratoriesSurgical cutting device
US4706667 *Jul 28, 1986Nov 17, 1987Berchtold Medizin-Elektronik Gmbh & Co.Electro surgical high frequency cutting instrument
US4938761 *Mar 6, 1989Jul 3, 1990Mdt CorporationBipolar electrosurgical forceps
US5151102 *May 31, 1990Sep 29, 1992Kyocera CorporationBlood vessel coagulation/stanching device
US5196009 *Sep 11, 1991Mar 23, 1993Kirwan Jr Lawrence TNon-sticking electrosurgical device having nickel tips
US5324289 *May 1, 1992Jun 28, 1994Hemostatic Surgery CorporationHemostatic bi-polar electrosurgical cutting apparatus and methods of use
US5330471 *May 1, 1992Jul 19, 1994Hemostatic Surgery CorporationBi-polar electrosurgical endoscopic instruments and methods of use
US5423814 *May 25, 1993Jun 13, 1995Loma Linda University Medical CenterEndoscopic bipolar coagulation device
US5472443 *Mar 17, 1994Dec 5, 1995Hemostatic Surgery CorporationFor manipulating tissue during surgery to cause homeostasis
US5484436 *Jun 24, 1994Jan 16, 1996Hemostatic Surgery CorporationBi-polar electrosurgical instruments and methods of making
US5633578 *Jul 15, 1994May 27, 1997Hemostatic Surgery CorporationElectrosurgical generator adaptors
US5693045 *Jun 7, 1995Dec 2, 1997Hemostatic Surgery CorporationElectrosurgical generator cable
US5693052 *Sep 1, 1995Dec 2, 1997Megadyne Medical Products, Inc.Comprising thermoconductive inorganic chromium coatings for transferring radio frequency energy; nonsticking at high current density
US5766166 *Feb 21, 1996Jun 16, 1998Enable Medical CorporationBipolar Electrosurgical scissors
US5766170 *Jan 3, 1997Jun 16, 1998Hemostatic Surgery CorporationElectrosurgical endoscopic instruments and methods of use
US5769849 *May 23, 1995Jun 23, 1998Hemostatic Surgery CorporationBi-polar electrosurgical endoscopic instruments
US5776128 *Jan 3, 1997Jul 7, 1998Hemostatic Surgery CorporationHemostatic bi-polar electrosurgical cutting apparatus
US5810808 *Jan 3, 1997Sep 22, 1998Hemostatic Surgery CorporationHemostatic bi-polar electrosurgical cutting apparatus and methods of use
US5843080 *Oct 16, 1996Dec 1, 1998Megadyne Medical Products, Inc.Bipolar instrument with multi-coated electrodes
US5891142 *Jun 18, 1997Apr 6, 1999Eggers & Associates, Inc.Electrosurgical forceps
US5944715 *Nov 25, 1996Aug 31, 1999Gyrus Medical LimitedElectrosurgical instrument
US6004319 *Jun 20, 1996Dec 21, 1999Gyrus Medical LimitedElectrosurgical instrument
US6013076 *Oct 25, 1996Jan 11, 2000Gyrus Medical LimitedElectrosurgical instrument
US6015406 *Aug 21, 1996Jan 18, 2000Gyrus Medical LimitedElectrosurgical instrument
US6027501 *Jun 20, 1998Feb 22, 2000Gyrus Medical LimitedElectrosurgical instrument
US6056746 *Mar 27, 1998May 2, 2000Gyrus Medical LimitedElectrosurgical instrument
US6090106 *Mar 26, 1998Jul 18, 2000Gyrus Medical LimitedElectrosurgical instrument
US6093186 *Dec 18, 1997Jul 25, 2000Gyrus Medical LimitedElectrosurgical generator and system
US6174308May 26, 1999Jan 16, 2001Gyrus Medical LimitedElectrosurgical instrument
US6179837Mar 7, 1995Jan 30, 2001Enable Medical CorporationBipolar electrosurgical scissors
US6210405Jun 17, 1997Apr 3, 2001Gyrus Medical LimitedUnder water treatment
US6234178May 27, 1999May 22, 2001Gyrus Medical LimitedElectrosurgical instrument
US6245070Nov 8, 1999Jun 12, 2001James A. MarquisForceps tissue removal device
US6261286Oct 16, 1998Jul 17, 2001Gyrus Medical LimitedElectrosurgical generator and system
US6277114Mar 18, 1999Aug 21, 2001Gyrus Medical LimitedElectrode assembly for an electrosurical instrument
US6293942May 2, 1996Sep 25, 2001Gyrus Medical LimitedElectrosurgical generator method
US6293946 *Aug 27, 1999Sep 25, 2001Link Technology, Inc.Non-stick electrosurgical forceps
US6306134Oct 16, 1998Oct 23, 2001Gyrus Medical LimitedElectrosurgical generator and system
US6312426May 30, 1997Nov 6, 2001Sherwood Services AgMethod and system for performing plate type radiofrequency ablation
US6350264Oct 23, 2000Feb 26, 2002Enable Medical CorporationBipolar electrosurgical scissors
US6364877Oct 16, 1998Apr 2, 2002Gyrus Medical LimitedElectrosurgical generator and system
US6391029Sep 29, 2000May 21, 2002Enable Medical CorporationBipolar electrosurgical scissors
US6416509Mar 26, 1998Jul 9, 2002Gyrus Medical LimitedElectrosurgical generator and system
US6464701Sep 29, 2000Oct 15, 2002Enable Medical CorporationBipolar electrosurgical scissors
US6482202Jan 10, 2001Nov 19, 2002Gyrus Medical LimitedUnder water treatment
US6565561Apr 3, 2000May 20, 2003Cyrus Medical LimitedElectrosurgical instrument
US6749610Aug 15, 2002Jun 15, 2004Kirwan Surgical Products, Inc.Electro-surgical forceps having fully plated tines and process for manufacturing same
US6773409Sep 19, 2001Aug 10, 2004Surgrx LlcSurgical system for applying ultrasonic energy to tissue
US6780180Mar 8, 2000Aug 24, 2004Gyrus Medical LimitedElectrosurgical instrument
US6802843Sep 12, 2002Oct 12, 2004Csaba TruckaiElectrosurgical working end with resistive gradient electrodes
US6843789Jul 2, 2002Jan 18, 2005Gyrus Medical LimitedElectrosurgical system
US6893435Oct 29, 2001May 17, 2005Gyrus Medical LimitedElectrosurgical system
US6905497May 31, 2003Jun 14, 2005Surgrx, Inc.Jaw structure for electrosurgical instrument
US6913579Apr 30, 2002Jul 5, 2005Surgrx, Inc.Electrosurgical working end and method for obtaining tissue samples for biopsy
US6926716Nov 9, 2002Aug 9, 2005Surgrx Inc.Electrosurgical instrument
US6929644Oct 22, 2001Aug 16, 2005Surgrx Inc.Electrosurgical jaw structure for controlled energy delivery
US7011657Jan 10, 2003Mar 14, 2006Surgrx, Inc.Jaw structure for electrosurgical instrument and method of use
US7041102May 22, 2003May 9, 2006Surgrx, Inc.Electrosurgical working end with replaceable cartridges
US7070597Aug 19, 2003Jul 4, 2006Surgrx, Inc.Electrosurgical working end for controlled energy delivery
US7083619Jul 19, 2002Aug 1, 2006Surgrx, Inc.Electrosurgical instrument and method of use
US7087054Sep 30, 2003Aug 8, 2006Surgrx, Inc.Electrosurgical instrument and method of use
US7112201Jan 22, 2003Sep 26, 2006Surgrx Inc.Electrosurgical instrument and method of use
US7169146Feb 17, 2004Jan 30, 2007Surgrx, Inc.Electrosurgical probe and method of use
US7186253Apr 29, 2005Mar 6, 2007Surgrx, Inc.Electrosurgical jaw structure for controlled energy delivery
US7189233Sep 3, 2004Mar 13, 2007Surgrx, Inc.Electrosurgical instrument
US7195627Jan 11, 2005Mar 27, 2007Gyrus Medical LimitedElectrosurgical generator
US7211081Dec 23, 2003May 1, 2007Gyrus Medical LimitedElectrosurgical generator
US7220951 *Apr 19, 2005May 22, 2007Surgrx, Inc.Surgical sealing surfaces and methods of use
US7309849Nov 18, 2004Dec 18, 2007Surgrx, Inc.Polymer compositions exhibiting a PTC property and methods of fabrication
US7354440Nov 18, 2004Apr 8, 2008Surgrx, Inc.Electrosurgical instrument and method of use
US7381209Feb 12, 2007Jun 3, 2008Surgrx, Inc.Electrosurgical instrument
US7632269Jan 18, 2005Dec 15, 2009Ethicon Endo-Surgery, Inc.Electrosurgical instrument with replaceable cartridge
US7717910Mar 26, 2007May 18, 2010Gyrus Medical LimitedElectrosurgical generator
US7789882 *May 9, 2006Sep 7, 2010Kirwan Surgical Products, Inc.Electrosurgical forceps with composite material tips
US7955331Mar 14, 2005Jun 7, 2011Ethicon Endo-Surgery, Inc.Electrosurgical instrument and method of use
US7981113Apr 7, 2008Jul 19, 2011Surgrx, Inc.Electrosurgical instrument
US8075555Mar 2, 2007Dec 13, 2011Surgrx, Inc.Surgical sealing surfaces and methods of use
US8075558Jul 2, 2005Dec 13, 2011Surgrx, Inc.Electrosurgical instrument and method
US8108994Mar 5, 2009Feb 7, 2012Kirwan Surgical Products LlcProcess for manufacturing electrosurgical forceps with composite material tips
US8292888Apr 22, 2002Oct 23, 2012Tyco Healthcare Group LpBipolar or ultrasonic surgical device
US8460292Dec 12, 2011Jun 11, 2013Ethicon Endo-Surgery, Inc.Electrosurgical instrument and method
US8523890Sep 12, 2012Sep 3, 2013Covidien LpBipolar or ultrasonic surgical device
US8551088Apr 1, 2009Oct 8, 2013Applied Medical Resources CorporationElectrosurgical system
US8562598Apr 1, 2009Oct 22, 2013Applied Medical Resources CorporationElectrosurgical system
US8568411Mar 31, 2009Oct 29, 2013Applied Medical Resources CorporationElectrosurgical system
US8579894Apr 1, 2009Nov 12, 2013Applied Medical Resources CorporationElectrosurgical system
US8656585Dec 6, 2011Feb 25, 2014Kirwan Surgical Products LlcProcess for manufacturing electrosurgical forceps with composite material tips
DE3012849A1 *Apr 2, 1980Oct 8, 1981Holzhauer & Sutter MedizinischBipolare koagulationspinzette
DE102010025742A1 *Jun 30, 2010Jan 5, 2012Hebumedical GmbhBipolare Pinzette
DE102010025742B4 *Jun 30, 2010May 29, 2013Hebumedical GmbhBipolare Pinzette
EP0517243A1 *Jun 5, 1992Dec 9, 1992Hemostatic Surgery CorporationHigh frequency electrosurgical apparatus employing constant voltage and methods of use
EP0517244A1 *Jun 5, 1992Dec 9, 1992Hemostatic Surgery CorporationHemostatic bi-polar electrosurgical cutting apparatus
EP0518230A1 *Jun 5, 1992Dec 16, 1992Hemostatic Surgery CorporationBi-polar electrosurgical endoscopic instruments
EP0637940A1 *Apr 30, 1993Feb 15, 1995EGGERS, Philip, E.Electrically heated surgical blade and methods of making
EP0986990A1Sep 18, 1998Mar 22, 2000Eggers & Associates, Inc.Electrosurgical forceps
EP1210022A1 *Aug 23, 2000Jun 5, 2002Link Technology Inc.Non-stick electrosurgical forceps
WO2001015615A1 *Aug 23, 2000Mar 8, 2001Link Technology IncNon-stick electrosurgical forceps
WO2002036028A1Oct 29, 2001May 10, 2002Colin Charles Owen GobleAn electrosurgical system
Classifications
U.S. Classification606/51
International ClassificationA61B18/14, A61B17/30
Cooperative ClassificationA61B18/1442, A61B17/30, A61B18/1402
European ClassificationA61B17/30, A61B18/14F