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Surgical cutting instrument having electrically heated cutting edge

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US3768482A
US3768482A US3768482DA US3768482A US 3768482 A US3768482 A US 3768482A US 3768482D A US3768482D A US 3768482DA US 3768482 A US3768482 A US 3768482A
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cutting
edge
element
tissue
electrodes
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R Shaw
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R Shaw
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/08Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by means of electrically-heated probes
    • A61B18/082Probes or electrodes therefor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12Surgical 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
    • A61B18/14Probes or electrodes therefor
    • A61B18/1402Probes for open surgery
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00053Mechanical features of the instrument of device
    • A61B2018/00107Coatings on the energy applicator
    • A61B2018/00119Coatings on the energy applicator with metal oxide nitride

Abstract

A surgical cutting instrument includes an electrically heated cutting edge and a power supply system for maintaining the cutting edge at a constant high temperature for sterilizing the blade, cutting tissue, and cauterizing the incised tissue to reduce hemorrhage from the cut surfaces of the tissues (hemostasis).

Description

U United States Patent [1 1 [111 3,768,482 Shaw Oct. 30, 1973 [54] SURGICAL CUTTING INSTRUMENT 3,234,356 2/1966 Babb 128/3031 HAVING ELECTRICALLY HEATED 3,584,190 6/1971 Marcoux 219/233 3,662,755 5/1972 Rautenbach 128/303.1

CUTTING EDGE [76] Inventor: Robert F. Shaw, 50 St. German Ave., San Francisco, Calif. 94114 [22] Filed: Oct. 10, 1972 [21] Appl. No.: 295,879

[52] U.S. Cl 128/303.1, 30/140, 128/303.14, 219/233 [51] Int. CL... A61n 3/00, A61b 17/38, A61b 17/32 [58] Field of Search 128/3031, 303.14,

l28/303.17; 30/140 X; 219/233 X [56] References Cited UNITED STATES PATENTS 2,917,614 12/1959 Caliri et a] 128/3031 X Primary ExaminerAldrich F. Medbery Attorney-A. C. Smith [57] ABSTRACT A surgical cutting instrument includes an electrically heated cutting edge and a power supply system for maintaining the cutting edge at a constant high temperature for sterilizing the blade, cutting tissue, and cauterizing the incised tissue to reduce hemorrhage from the cut surfaces of the tissues (hemostasis).

4 Claims, 3 Drawing Figures I s- CONSTANT VOLTAGE 1- SOURCE 62 ///,,///////////I////4 g 2 SURGICAL CUTTING INSTRUMENT HAVING ELECTRICALLY HEATED CUTTING EDGE BACKGROUND OF THE INVENTION The control of bleeding during surgery accounts for a major portion of the total time involved in an operation. The bleeding that occurs when tissue is incised obscures the surgeons vision, reduces his precision and often dictates slow and elaborate procedures in surgical operations. Each bleeding vessel must be grasped in pincer-like clamps to stop the flow of blood and the tissue and vessel within each clamp must then be tied with pieces of fine thread. These ligated masses of tissue die and decompose and thus tend to retard healing and promote infection.

SUMMARY OF THE INVENTION Accordingly, the present invention provides a surgical cutting instrument having a cutting edge which is electrically heated to a constant high temperature for sterilizing the blade, cutting the tissue and cauterizing the surfaces of the incision, thereby allowing surgery to be more rapidly performed. This is accomplished in accordance with the illustrated embodiment of this invention by providing electrically heated elements disposed to form the cutting edge of the blade and by providing a common constant voltage source which operates to maintain the cutting edge at a high substantially constant temperature during its use. The hot cutting edge according to the present invention decreases the amount of tissue that is damaged and reduces the tendency of the instrument to stick to the heated tissue in the incision. In one embodiment, the material used in the electrically heated cutting edge has a positive temperature coefficient'of resistance. The temperature at which the cutting edge of the blade is maintained depends upon such factors as the nature of the tissue to be cut, the speed of cutting desired, the degree of tissue coagulation desired, and the non-adherence of the blade to the incised tissue and generally is maintained between 300l ,000 Centigrade for typical incisions in typical human tissue. The cutting edge includes many parallel current paths in a conductive material connected between the terminals of a constant-voltage power source. The operating temperature of the cutting edge is controlled by altering the voltage between the terminals. 7

The handle of the cutting instrument is thermally ins'ulated from the blade to permit comfortable use of the instrument and the handle and blade with its electrically-heated cutting edge are detachable for easy replacement and interchangeability with blades having cutting edges of various shapes and sizes determined by the nature of the incision to be made and the tissue to be cut.

DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 are pictorial views of embodiments of cutting instruments according to the present invention; and

FIG. 3 is an end sectional view of the embodiment of FIG. 1 showing the heater element disposed as the cutting edge of the blade between electrodes on opposite sides thereof.

DESCRIPTION OF THE PREFERRED EMBODIMENT I Referring now to FIGS. 1 and 3 of the drawing, there is shown the surgical cutting instrument 9 including a thin ceramic card 63 in the desired shape of a surgical cutting blade which is detachable from the handle or holder 10. An electrical heating element 61 is disposed in the region of, i.e. on or about, the cutting edge 62 of ceramic card 63 between electrodes 65 and 67 which are electrically connected to a constant voltage source through the cable 14 and the connectors 71 and 73. The element 61 may be a continuous conductive film attached to the card 63, for example, using conventional vapor-deposition processes. The material used for the element 61 may be tantalum nitride or other similar material having a positive temperature coefficient of resistance. Thus, as a portion of the element cools when in contact with tissue, the resistance of such portion of the element decreases and draws increased current from the constant voltage source 75. This localizes the portion of the element 61 in which additional power is dissipated to the portion cooled on contact with tissue. The temperature of such portions of the element may thus be maintained substantially constant as the cutting edge comes in contact with tissue being cut. Other suitable materials having positive temperature coefficients of resistance for use as the element 61 include tungsten, nickel, platinum, chromium, alloys of such metals, and the like.

In the embodiment of the present invention illustrated in FIGS. 1 and 3, the heating element 61 is laterally disposed across the cutting edge 62 of the bladelike support card 63 to form a continuum of currentconducting paths along the length of the cutting edge. These current-conducting paths of heating element 61 are all parallel-connected between the contact electrodes 65 and 67 which are disposed on opposite sides of the support card 63. These contact electrodes may be formed of a material such as platinum or tungsten, or the like, which makes good contact with the heating element material and which does not readily oxidize at elevated operating temperatures. Alternatively, the heating element 61 may also be arranged to traverse the cutting edge 62 as discrete, closely-spaced elements 69 that are all parallel-connected between oppositeside electrodes 65 and 67 on the card 63, as shown in FIG. 2. Such discrete elements are connected on one side of the card 63 to the electrode 67 and on the other side of the card to electrode 65. In the limit, the heating elements 69, as shown in FIG. 2, may be sufficiently closely located along the cutting edge 62 in parallel connection between the opposite-side electrodes 65 and 67, as to perform substantially as a continuous conductive film, as shown in FIG. 1.

In each of the illustrated embodiments, the electrodes 65 and 67 and heating elements 61 or 69 may be conductive material which is vapor-deposited in the desired interconnected patterns on a suitable electricallyinsulating ceramic card 63. Alternatively, the electrodes and heater elements may be etched to shape on a card 63 whose side surfaces and edges are coated with the selected conductive materials.

In each of these embodiments, the electrodes 65, 67 are connected through conductors l4 and suitable electrical connectors 71, 73 mounted in the handle 10 to a source 75 of substantially constant voltage. This source 75 may be a conventional, well-regulated power supply or other low-output impedance supply which is capable of delivering the total current required by all portions of heating element 61 (or by all discrete elements 69) while maintaining the voltage between electrodes 65 and 67 substantially constant. In this way, each portion of heating element 61 (or discrete element 69) which cools down when placed in contact with tissue during surgical use decreases in resistance between electrodes (for positive temperature coefficient of resistance). With constant voltage applied to the electrodes, the cooled regions draw correspondingly more current and dissipate more power in the cooled region, thereby tending to maintain the heating element all along the cutting edge at the preselected operating temperature. The operating temperature of the cutting edge is thus selected by altering the value of the constant voltage supplied by source 75. To assure substantially uniform operating temperature over the length of the cutting edge 62, the heating element 61 (or the discrete elements 69 closely spaced about the edge) may have substantially uniform resistance per unit area. The ceramic card 63 may be formed of high thermal conductivity material such as aluminum oxide, or the like, to assure more uniform operating temperature along the length of the cutting edge.

I claim: 1. A surgical instrument for cutting tissue with simultaneous hemostasis, the instrument comprising:

insulating support means having a tissue-cutting edge and including thereon an electrically-heatable element of electrically-conductive material disposed on said edge region defining a cutting edge to contact tissue and to conduct electrical current along a plurality of parallel current paths for directly heating the cutting edge in response to electrical signal applied thereto; and connection means on said instrument providing electrical connections to said element for supplying electrical signal, thereto to be conducted along a plurality of parallel current paths. 2. A surgical instrument as in claim 1 wherein said electrically-heatable element includes a substantially continuous conductive layer disposed adjacent the cutting edge; and

said connection means includes a pair of electrodes which are disposed in spaced relationship on opposite sides of said support means and-which are connected to said conductive layer on opposite sides of the cutting edge for conducting current along a plurality of parallel current paths oriented substantially laterally across the cutting edge. 3. A surgical instrument as in claim 1 wherein: said electrodes are disposed on opposite sides of said support means; and i the electrically-heatable element includes a plurality of discrete electrically-heatable elements disposed to traverse the cutting edge of said support means and connected at the ends thereof to electrodes on opposite sides of said support means.

4. A surgical instrument as in claim 1 wherein:

said electrically-heatable element on said support.

means is formed of electrically-conductive material which has positive-temperature coefficient of resistance; and

said connection means includes a source of substantially constant voltage connected to said pair of electrodes for maintaining the voltage across the element substantially constant as portions of said element contact tissue.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,768,482 Dated October 30, 1973 Invent r.( Robert F. Shaw It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 4, line 16, "electrodes" should read connection means line 21, "electrodes" should read connection means lines 30-31, ""pair of electrodes" should read connection means I Signed and Scaled this A ttes t:

RUTH C. MASON C. MARSHALL DANN Arresting Ofl'irer Commissioner uflatems and Trademarks UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,768,482 Dated October 30, 1973 lnv nt fl Robert F. Shaw It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 4, line 16, "electrodes" should read connection means line 21, "electrodes" should read connection means lines 30-31, "pair of electrodes" should read connection means Signal and Scalcd this sixte enlh Day Of December 1975 [SEAL] A ttest:

RUTH C. MASON C. MARSHALL DANN Arresting Officer Commissioner oj'Parems and Trademarks

Claims (4)

1. A surgical instrument for cutting tissue with simultaneous hemostasis, the instrument comprising: insulating support means having a tissue-cutting edge and including thereon an electrically-heatable element of electrically-conductive material disposed on said edge region defining a cutting edge to contact tissue and to conduct electrical current along a plurality of parallel current paths for directly heating the cutting edge in response to electrical signal applied thereto; and connection means on said instrument providing electrical connections to said element for supplying electrical signal thereto to be conducted along a plurality of parallel current paths.
2. A surgical instrument as in claim 1 wherein said electrically-heatable element includes a substantially continuous conductive layer disposed adjacent the cutting edge; and said connection means includes a pair of electrodes which are disposed in spaced relationship on opposite sides of said support means and which are connected to said conductive layer on opposite sides of the cutting edge for conducting current along a plurality of parallel current paths oriented substantially laterally across the cutting edge.
3. A surgical instrument as in claim 1 wherein: said electrodes are disposed on opposite sides of said support means; and the electrically-heatable element includes a plurality of discrete electrically-heatable elements disposed to traverse the cutting edge of said support means and connected at the ends thereof to electrodes on opposite sides of said support means.
4. A surgical instrument as in claim 1 wherein: said electrically-heatable element on said support means is formed of electrically-conductive material which has positive-temperature coefficient of resistance; and said connection means includes a source of substantially constant voltage connected to said pair of electrodes for maintaining the voltage across the element substantially constant as portions of said element contact tissue.
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Cited By (130)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51122985A (en) * 1975-03-14 1976-10-27 Shaw Robert F Incising device and method thereof
JPS51122987A (en) * 1975-03-14 1976-10-27 Shaw Robert F Incising device and method thereof
JPS51122989A (en) * 1975-03-14 1976-10-27 Shaw Robert F Incising device and method thereof
US4031898A (en) * 1974-12-03 1977-06-28 Siegfried Hiltebrandt Surgical instrument for coagulation purposes
US4091813A (en) * 1975-03-14 1978-05-30 Robert F. Shaw Surgical instrument having self-regulated electrical proximity heating of its cutting edge and method of using the same
US4161950A (en) * 1975-08-01 1979-07-24 The United States Of America As Represented By The United States Department Of Energy Electrosurgical knife
US4185632A (en) * 1970-08-13 1980-01-29 Shaw Robert F Surgical instrument having self-regulated electrical skin-depth heating of its cutting edge and method of using the same
US4196734A (en) * 1978-02-16 1980-04-08 Valleylab, Inc. Combined electrosurgery/cautery system and method
US4202337A (en) * 1977-06-14 1980-05-13 Concept, Inc. Bipolar electrosurgical knife
US4207896A (en) * 1970-08-13 1980-06-17 Shaw Robert F Surgical instrument having self-regulating dielectric heating of its cutting edge
US4228800A (en) * 1978-04-04 1980-10-21 Concept, Inc. Bipolar electrosurgical knife
US4364390A (en) * 1975-03-14 1982-12-21 Shaw Robert F Surgical instrument having self-regulating dielectric heating of its cutting edge and method of using the same
EP0103977A1 (en) * 1982-08-16 1984-03-28 E.I. Du Pont De Nemours And Company Improved sterile docking cutting means
US4506668A (en) * 1982-06-23 1985-03-26 Olympus Winter & Ibe Gmbh Insulated sleeve high frequency resectoscope
US4651734A (en) * 1985-02-08 1987-03-24 The United States Of America As Represented By The United States Department Of Energy Electrosurgical device for both mechanical cutting and coagulation of bleeding
US4681105A (en) * 1982-04-19 1987-07-21 S+T Marketing Ag Microsurgical tool
DK151528B (en) * 1974-07-29 1987-12-14 Shaw Robert F Surgical skaereinstrument heated with eggs
US4770067A (en) * 1987-06-08 1988-09-13 Kollmorgen Corporation Method of manufacturing surgical cutting tools for thermally aided surgery
US4862890A (en) * 1988-02-29 1989-09-05 Everest Medical Corporation Electrosurgical spatula blade with ceramic substrate
US5308311A (en) * 1992-05-01 1994-05-03 Robert F. Shaw Electrically heated surgical blade and methods of making
US5451224A (en) * 1992-02-27 1995-09-19 G2 Design Limited Apparatus for radio frequency bipolar electrosurgery
US5480398A (en) * 1992-05-01 1996-01-02 Hemostatic Surgery Corporation Endoscopic instrument with disposable auto-regulating heater
US5480397A (en) * 1992-05-01 1996-01-02 Hemostatic Surgery Corporation Surgical instrument with auto-regulating heater and method of using same
US5531744A (en) * 1991-11-01 1996-07-02 Medical Scientific, Inc. Alternative current pathways for bipolar surgical cutting tool
US5624452A (en) * 1995-04-07 1997-04-29 Ethicon Endo-Surgery, Inc. Hemostatic surgical cutting or stapling instrument
US5665085A (en) * 1991-11-01 1997-09-09 Medical Scientific, Inc. Electrosurgical cutting tool
US5766166A (en) * 1995-03-07 1998-06-16 Enable Medical Corporation Bipolar Electrosurgical scissors
US5792137A (en) * 1995-10-27 1998-08-11 Lacar Microsystems, Inc. Coagulating microsystem
US6132426A (en) * 1998-05-05 2000-10-17 Daig Corporation Temperature and current limited ablation catheter
US6179837B1 (en) 1995-03-07 2001-01-30 Enable Medical Corporation Bipolar electrosurgical scissors
US6230603B1 (en) * 1996-04-29 2001-05-15 Zbigniew Kubala Cutting blade for resistance-heated elastomer cutters
US6358273B1 (en) 1999-04-09 2002-03-19 Oratec Inventions, Inc. Soft tissue heating apparatus with independent, cooperative heating sources
WO2002021992A2 (en) * 2000-09-12 2002-03-21 A.T.C.T Advanced Thermal Chips Technologies Ltd. Surgical cauterizing instrument particularly useful as a cauterizing scalpel
US6379350B1 (en) 1999-10-05 2002-04-30 Oratec Interventions, Inc. Surgical instrument for ablation and aspiration
US6391029B1 (en) 1995-03-07 2002-05-21 Enable Medical Corporation Bipolar electrosurgical scissors
US6391028B1 (en) 1997-02-12 2002-05-21 Oratec Interventions, Inc. Probe with distally orientated concave curve for arthroscopic surgery
US6461357B1 (en) 1997-02-12 2002-10-08 Oratec Interventions, Inc. Electrode for electrosurgical ablation of tissue
US6464701B1 (en) 1995-03-07 2002-10-15 Enable Medical Corporation Bipolar electrosurgical scissors
US6544260B1 (en) 1996-08-20 2003-04-08 Oratec Interventions, Inc. Method for treating tissue in arthroscopic environment using precooling and apparatus for same
US6645203B2 (en) 1997-02-12 2003-11-11 Oratec Interventions, Inc. Surgical instrument with off-axis electrode
US6695839B2 (en) 2001-02-08 2004-02-24 Oratec Interventions, Inc. Method and apparatus for treatment of disrupted articular cartilage
US20040068307A1 (en) * 2000-02-08 2004-04-08 Gyrus Medical Limited Surgical instrument
US20040138654A1 (en) * 2003-01-09 2004-07-15 Gyrus Medical Limited Electrosurgical generator
US6802843B2 (en) 2001-09-13 2004-10-12 Csaba Truckai Electrosurgical working end with resistive gradient electrodes
US6905497B2 (en) 2001-10-22 2005-06-14 Surgrx, Inc. Jaw structure for electrosurgical instrument
US6913579B2 (en) 2001-05-01 2005-07-05 Surgrx, Inc. Electrosurgical working end and method for obtaining tissue samples for biopsy
US6926716B2 (en) 2001-11-09 2005-08-09 Surgrx Inc. Electrosurgical instrument
US6929644B2 (en) 2001-10-22 2005-08-16 Surgrx Inc. Electrosurgical jaw structure for controlled energy delivery
US6939346B2 (en) 1999-04-21 2005-09-06 Oratec Interventions, Inc. Method and apparatus for controlling a temperature-controlled probe
US20060027553A1 (en) * 2004-08-09 2006-02-09 Hanisko Francis D Heater for endodontic condenser
US6997941B2 (en) 1996-08-13 2006-02-14 Oratec Interventions, Inc. Method and apparatus for treating annular fissures in intervertebral discs
US7011657B2 (en) 2001-10-22 2006-03-14 Surgrx, Inc. Jaw structure for electrosurgical instrument and method of use
US7041102B2 (en) 2001-10-22 2006-05-09 Surgrx, Inc. Electrosurgical working end with replaceable cartridges
US7044948B2 (en) 2002-12-10 2006-05-16 Sherwood Services Ag Circuit for controlling arc energy from an electrosurgical generator
US7070597B2 (en) 2001-10-18 2006-07-04 Surgrx, Inc. Electrosurgical working end for controlled energy delivery
US7083619B2 (en) 2001-10-22 2006-08-01 Surgrx, Inc. Electrosurgical instrument and method of use
US7087054B2 (en) 2002-10-01 2006-08-08 Surgrx, Inc. Electrosurgical instrument and method of use
US20060212030A1 (en) * 2005-03-16 2006-09-21 Mcgaffigan Thomas H Integrated metalized ceramic heating element for use in a tissue cutting and sealing device
US7112201B2 (en) 2001-10-22 2006-09-26 Surgrx Inc. Electrosurgical instrument and method of use
US7131860B2 (en) 2003-11-20 2006-11-07 Sherwood Services Ag Connector systems for electrosurgical generator
US7137980B2 (en) 1998-10-23 2006-11-21 Sherwood Services Ag Method and system for controlling output of RF medical generator
US7169146B2 (en) 2003-02-14 2007-01-30 Surgrx, Inc. Electrosurgical probe and method of use
US7189233B2 (en) 2001-10-22 2007-03-13 Surgrx, Inc. Electrosurgical instrument
US7195627B2 (en) 2003-01-09 2007-03-27 Gyrus Medical Limited Electrosurgical generator
US7226447B2 (en) 2004-06-23 2007-06-05 Smith & Nephew, Inc. Electrosurgical generator
US7255694B2 (en) 2002-12-10 2007-08-14 Sherwood Services Ag Variable output crest factor electrosurgical generator
US7300435B2 (en) 2003-11-21 2007-11-27 Sherwood Services Ag Automatic control system for an electrosurgical generator
US7303557B2 (en) 1998-10-23 2007-12-04 Sherwood Services Ag Vessel sealing system
US7309849B2 (en) 2003-11-19 2007-12-18 Surgrx, Inc. Polymer compositions exhibiting a PTC property and methods of fabrication
US20080058792A1 (en) * 2006-09-01 2008-03-06 Applied Medical Resources Corporation Monopolar electrosurgical return electrode
US7354440B2 (en) 2001-10-22 2008-04-08 Surgrx, Inc. Electrosurgical instrument and method of use
US7364577B2 (en) 2002-02-11 2008-04-29 Sherwood Services Ag Vessel sealing system
USRE40388E1 (en) 1997-04-09 2008-06-17 Covidien Ag Electrosurgical generator with adaptive power control
US7396336B2 (en) 2003-10-30 2008-07-08 Sherwood Services Ag Switched resonant ultrasonic power amplifier system
US7513896B2 (en) 2006-01-24 2009-04-07 Covidien Ag Dual synchro-resonant electrosurgical apparatus with bi-directional magnetic coupling
US20090112200A1 (en) * 2007-10-30 2009-04-30 Hemostatix Medical Technologies Llc Hemostatic surgical blade, system and method of blade manufacture
US7628786B2 (en) 2004-10-13 2009-12-08 Covidien Ag Universal foot switch contact port
US7632269B2 (en) 2004-01-16 2009-12-15 Ethicon Endo-Surgery, Inc. Electrosurgical instrument with replaceable cartridge
US7637907B2 (en) 2006-09-19 2009-12-29 Covidien Ag System and method for return electrode monitoring
US7648499B2 (en) 2006-03-21 2010-01-19 Covidien Ag System and method for generating radio frequency energy
US7651492B2 (en) 2006-04-24 2010-01-26 Covidien Ag Arc based adaptive control system for an electrosurgical unit
US7651493B2 (en) 2006-03-03 2010-01-26 Covidien Ag System and method for controlling electrosurgical snares
US7655003B2 (en) 2005-06-22 2010-02-02 Smith & Nephew, Inc. Electrosurgical power control
US7722601B2 (en) 2003-05-01 2010-05-25 Covidien Ag Method and system for programming and controlling an electrosurgical generator system
US7731717B2 (en) 2006-08-08 2010-06-08 Covidien Ag System and method for controlling RF output during tissue sealing
US7749217B2 (en) 2002-05-06 2010-07-06 Covidien Ag Method and system for optically detecting blood and controlling a generator during electrosurgery
US7766905B2 (en) 2004-02-12 2010-08-03 Covidien Ag Method and system for continuity testing of medical electrodes
US7780662B2 (en) 2004-03-02 2010-08-24 Covidien Ag Vessel sealing system using capacitive RF dielectric heating
US7794457B2 (en) 2006-09-28 2010-09-14 Covidien Ag Transformer for RF voltage sensing
US20100268211A1 (en) * 2009-04-17 2010-10-21 Kim Manwaring Inductively Heated Multi-Mode Bipolar Surgical Tool
US7834484B2 (en) 2007-07-16 2010-11-16 Tyco Healthcare Group Lp Connection cable and method for activating a voltage-controlled generator
US7901400B2 (en) 1998-10-23 2011-03-08 Covidien Ag Method and system for controlling output of RF medical generator
US20110077631A1 (en) * 2009-09-28 2011-03-31 Tyco Healthcare Group Lp Electrosurgical Generator User Interface
US7927328B2 (en) 2006-01-24 2011-04-19 Covidien Ag System and method for closed loop monitoring of monopolar electrosurgical apparatus
US20110099742A1 (en) * 2008-05-30 2011-05-05 Hot Edge Oy Heated Ice Scraper
US7947039B2 (en) 2005-12-12 2011-05-24 Covidien Ag Laparoscopic apparatus for performing electrosurgical procedures
US7955331B2 (en) 2004-03-12 2011-06-07 Ethicon Endo-Surgery, Inc. Electrosurgical instrument and method of use
US7972328B2 (en) 2006-01-24 2011-07-05 Covidien Ag System and method for tissue sealing
US8034049B2 (en) 2006-08-08 2011-10-11 Covidien Ag System and method for measuring initial tissue impedance
US8075558B2 (en) 2002-04-30 2011-12-13 Surgrx, Inc. Electrosurgical instrument and method
US8104956B2 (en) 2003-10-23 2012-01-31 Covidien Ag Thermocouple measurement circuit
US8147485B2 (en) 2006-01-24 2012-04-03 Covidien Ag System and method for tissue sealing
US8216223B2 (en) 2006-01-24 2012-07-10 Covidien Ag System and method for tissue sealing
US8216220B2 (en) 2007-09-07 2012-07-10 Tyco Healthcare Group Lp System and method for transmission of combined data stream
US8226639B2 (en) 2008-06-10 2012-07-24 Tyco Healthcare Group Lp System and method for output control of electrosurgical generator
US8292888B2 (en) 2001-04-20 2012-10-23 Tyco Healthcare Group Lp Bipolar or ultrasonic surgical device
US8486061B2 (en) 2009-01-12 2013-07-16 Covidien Lp Imaginary impedance process monitoring and intelligent shut-off
US8512332B2 (en) 2007-09-21 2013-08-20 Covidien Lp Real-time arc control in electrosurgical generators
US8617151B2 (en) 2009-04-17 2013-12-31 Domain Surgical, Inc. System and method of controlling power delivery to a surgical instrument
US8663214B2 (en) 2006-01-24 2014-03-04 Covidien Ag Method and system for controlling an output of a radio-frequency medical generator having an impedance based control algorithm
US8685016B2 (en) 2006-01-24 2014-04-01 Covidien Ag System and method for tissue sealing
US8734438B2 (en) 2005-10-21 2014-05-27 Covidien Ag Circuit and method for reducing stored energy in an electrosurgical generator
US8753334B2 (en) 2006-05-10 2014-06-17 Covidien Ag System and method for reducing leakage current in an electrosurgical generator
US8777941B2 (en) 2007-05-10 2014-07-15 Covidien Lp Adjustable impedance electrosurgical electrodes
US8808161B2 (en) 2003-10-23 2014-08-19 Covidien Ag Redundant temperature monitoring in electrosurgical systems for safety mitigation
US8840609B2 (en) 2010-07-23 2014-09-23 Conmed Corporation Tissue fusion system and method of performing a functional verification test
US8858544B2 (en) 2011-05-16 2014-10-14 Domain Surgical, Inc. Surgical instrument guide
US8915909B2 (en) 2011-04-08 2014-12-23 Domain Surgical, Inc. Impedance matching circuit
US20140378968A1 (en) * 2013-06-21 2014-12-25 Boston Scientific Scimed, Inc. Medical devices for renal nerve ablation
US8932279B2 (en) 2011-04-08 2015-01-13 Domain Surgical, Inc. System and method for cooling of a heated surgical instrument and/or surgical site and treating tissue
US9078655B2 (en) 2009-04-17 2015-07-14 Domain Surgical, Inc. Heated balloon catheter
US9107666B2 (en) 2009-04-17 2015-08-18 Domain Surgical, Inc. Thermal resecting loop
US9131977B2 (en) 2009-04-17 2015-09-15 Domain Surgical, Inc. Layered ferromagnetic coated conductor thermal surgical tool
JP2015532857A (en) * 2012-09-20 2015-11-16 ミノシス セルラー デバイシズ インコーポレイテッド Device for automatically capsulotomy
US9186200B2 (en) 2006-01-24 2015-11-17 Covidien Ag System and method for tissue sealing
US9265556B2 (en) 2009-04-17 2016-02-23 Domain Surgical, Inc. Thermally adjustable surgical tool, balloon catheters and sculpting of biologic materials
US9474564B2 (en) 2005-03-31 2016-10-25 Covidien Ag Method and system for compensating for external impedance of an energy carrying component when controlling an electrosurgical generator
US9526558B2 (en) 2011-09-13 2016-12-27 Domain Surgical, Inc. Sealing and/or cutting instrument
US9636165B2 (en) 2013-07-29 2017-05-02 Covidien Lp Systems and methods for measuring tissue impedance through an electrosurgical cable
US9872719B2 (en) 2013-07-24 2018-01-23 Covidien Lp Systems and methods for generating electrosurgical energy using a multistage power converter

Cited By (221)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4185632A (en) * 1970-08-13 1980-01-29 Shaw Robert F Surgical instrument having self-regulated electrical skin-depth heating of its cutting edge and method of using the same
US4207896A (en) * 1970-08-13 1980-06-17 Shaw Robert F Surgical instrument having self-regulating dielectric heating of its cutting edge
DK151528B (en) * 1974-07-29 1987-12-14 Shaw Robert F Surgical skaereinstrument heated with eggs
US4031898A (en) * 1974-12-03 1977-06-28 Siegfried Hiltebrandt Surgical instrument for coagulation purposes
US4091813A (en) * 1975-03-14 1978-05-30 Robert F. Shaw Surgical instrument having self-regulated electrical proximity heating of its cutting edge and method of using the same
US4364390A (en) * 1975-03-14 1982-12-21 Shaw Robert F Surgical instrument having self-regulating dielectric heating of its cutting edge and method of using the same
JPS51122989A (en) * 1975-03-14 1976-10-27 Shaw Robert F Incising device and method thereof
JPS51122987A (en) * 1975-03-14 1976-10-27 Shaw Robert F Incising device and method thereof
JPS51122985A (en) * 1975-03-14 1976-10-27 Shaw Robert F Incising device and method thereof
JPS6128339B2 (en) * 1975-03-14 1986-06-30 Shaw Robert F
US4161950A (en) * 1975-08-01 1979-07-24 The United States Of America As Represented By The United States Department Of Energy Electrosurgical knife
US4202337A (en) * 1977-06-14 1980-05-13 Concept, Inc. Bipolar electrosurgical knife
US4196734A (en) * 1978-02-16 1980-04-08 Valleylab, Inc. Combined electrosurgery/cautery system and method
US4228800A (en) * 1978-04-04 1980-10-21 Concept, Inc. Bipolar electrosurgical knife
US4681105A (en) * 1982-04-19 1987-07-21 S+T Marketing Ag Microsurgical tool
US4506668A (en) * 1982-06-23 1985-03-26 Olympus Winter & Ibe Gmbh Insulated sleeve high frequency resectoscope
EP0103977A1 (en) * 1982-08-16 1984-03-28 E.I. Du Pont De Nemours And Company Improved sterile docking cutting means
US4651734A (en) * 1985-02-08 1987-03-24 The United States Of America As Represented By The United States Department Of Energy Electrosurgical device for both mechanical cutting and coagulation of bleeding
US4770067A (en) * 1987-06-08 1988-09-13 Kollmorgen Corporation Method of manufacturing surgical cutting tools for thermally aided surgery
US4862890A (en) * 1988-02-29 1989-09-05 Everest Medical Corporation Electrosurgical spatula blade with ceramic substrate
US6436097B1 (en) 1991-11-01 2002-08-20 Medical Scientific, Inc. Electrosurgical cutting tool
US5531744A (en) * 1991-11-01 1996-07-02 Medical Scientific, Inc. Alternative current pathways for bipolar surgical cutting tool
US5665085A (en) * 1991-11-01 1997-09-09 Medical Scientific, Inc. Electrosurgical cutting tool
US5451224A (en) * 1992-02-27 1995-09-19 G2 Design Limited Apparatus for radio frequency bipolar electrosurgery
US5480398A (en) * 1992-05-01 1996-01-02 Hemostatic Surgery Corporation Endoscopic instrument with disposable auto-regulating heater
US5308311A (en) * 1992-05-01 1994-05-03 Robert F. Shaw Electrically heated surgical blade and methods of making
US5480397A (en) * 1992-05-01 1996-01-02 Hemostatic Surgery Corporation Surgical instrument with auto-regulating heater and method of using same
US6179837B1 (en) 1995-03-07 2001-01-30 Enable Medical Corporation Bipolar electrosurgical scissors
US6464701B1 (en) 1995-03-07 2002-10-15 Enable Medical Corporation Bipolar electrosurgical scissors
US5766166A (en) * 1995-03-07 1998-06-16 Enable Medical Corporation Bipolar Electrosurgical scissors
US6391029B1 (en) 1995-03-07 2002-05-21 Enable Medical Corporation Bipolar electrosurgical scissors
US6350264B1 (en) 1995-03-07 2002-02-26 Enable Medical Corporation Bipolar electrosurgical scissors
US5716366A (en) * 1995-04-07 1998-02-10 Ethicon Endo-Surgery, Inc. Hemostatic surgical cutting or stapling instrument
US5624452A (en) * 1995-04-07 1997-04-29 Ethicon Endo-Surgery, Inc. Hemostatic surgical cutting or stapling instrument
US5792137A (en) * 1995-10-27 1998-08-11 Lacar Microsystems, Inc. Coagulating microsystem
US6230603B1 (en) * 1996-04-29 2001-05-15 Zbigniew Kubala Cutting blade for resistance-heated elastomer cutters
US8226697B2 (en) 1996-08-13 2012-07-24 Neurotherm, Inc. Method for treating intervertebral disc
US20080091252A1 (en) * 1996-08-13 2008-04-17 Oratec Interventions, Inc., A California Corporation Method for treating intervertebral disc
US7400930B2 (en) 1996-08-13 2008-07-15 Oratec Interventions, Inc. Method for treating intervertebral discs
US7647123B2 (en) 1996-08-13 2010-01-12 Oratec Interventions, Inc. Method for treating intervertebral discs
US8187312B2 (en) 1996-08-13 2012-05-29 Neurotherm, Inc. Method for treating intervertebral disc
US6997941B2 (en) 1996-08-13 2006-02-14 Oratec Interventions, Inc. Method and apparatus for treating annular fissures in intervertebral discs
US7267683B2 (en) 1996-08-13 2007-09-11 Oratec Interventions, Inc. Method for treating intervertebral discs
US7282061B2 (en) 1996-08-13 2007-10-16 Oratec Interventions, Inc. Method of treating intervertebral disc
US6544260B1 (en) 1996-08-20 2003-04-08 Oratec Interventions, Inc. Method for treating tissue in arthroscopic environment using precooling and apparatus for same
US6645203B2 (en) 1997-02-12 2003-11-11 Oratec Interventions, Inc. Surgical instrument with off-axis electrode
US6461357B1 (en) 1997-02-12 2002-10-08 Oratec Interventions, Inc. Electrode for electrosurgical ablation of tissue
US6391028B1 (en) 1997-02-12 2002-05-21 Oratec Interventions, Inc. Probe with distally orientated concave curve for arthroscopic surgery
USRE40388E1 (en) 1997-04-09 2008-06-17 Covidien Ag Electrosurgical generator with adaptive power control
US6132426A (en) * 1998-05-05 2000-10-17 Daig Corporation Temperature and current limited ablation catheter
US7901400B2 (en) 1998-10-23 2011-03-08 Covidien Ag Method and system for controlling output of RF medical generator
US8105323B2 (en) 1998-10-23 2012-01-31 Covidien Ag Method and system for controlling output of RF medical generator
US9168089B2 (en) 1998-10-23 2015-10-27 Covidien Ag Method and system for controlling output of RF medical generator
US7137980B2 (en) 1998-10-23 2006-11-21 Sherwood Services Ag Method and system for controlling output of RF medical generator
US8287528B2 (en) 1998-10-23 2012-10-16 Covidien Ag Vessel sealing system
US9113900B2 (en) 1998-10-23 2015-08-25 Covidien Ag Method and system for controlling output of RF medical generator
US7303557B2 (en) 1998-10-23 2007-12-04 Sherwood Services Ag Vessel sealing system
US6358273B1 (en) 1999-04-09 2002-03-19 Oratec Inventions, Inc. Soft tissue heating apparatus with independent, cooperative heating sources
US6939346B2 (en) 1999-04-21 2005-09-06 Oratec Interventions, Inc. Method and apparatus for controlling a temperature-controlled probe
US9662514B2 (en) 1999-06-02 2017-05-30 Covidien Lp Bipolar or ultrasonic surgical device
US6379350B1 (en) 1999-10-05 2002-04-30 Oratec Interventions, Inc. Surgical instrument for ablation and aspiration
US20060111711A1 (en) * 2000-02-08 2006-05-25 Gyrus Medical Limited Surgical instrument
US20040068307A1 (en) * 2000-02-08 2004-04-08 Gyrus Medical Limited Surgical instrument
US20040030327A1 (en) * 2000-09-12 2004-02-12 Gady Golan Surgical cauterizing instrument particularly useful as a cauterizing scalpel
WO2002021992A3 (en) * 2000-09-12 2003-08-14 A T C T Advanced Thermal Chips Surgical cauterizing instrument particularly useful as a cauterizing scalpel
WO2002021992A2 (en) * 2000-09-12 2002-03-21 A.T.C.T Advanced Thermal Chips Technologies Ltd. Surgical cauterizing instrument particularly useful as a cauterizing scalpel
US6695839B2 (en) 2001-02-08 2004-02-24 Oratec Interventions, Inc. Method and apparatus for treatment of disrupted articular cartilage
US8523890B2 (en) 2001-04-20 2013-09-03 Covidien Lp Bipolar or ultrasonic surgical device
US8292888B2 (en) 2001-04-20 2012-10-23 Tyco Healthcare Group Lp Bipolar or ultrasonic surgical device
US8845665B2 (en) 2001-04-20 2014-09-30 Covidien Lp Bipolar or ultrasonic surgical device
US6913579B2 (en) 2001-05-01 2005-07-05 Surgrx, Inc. Electrosurgical working end and method for obtaining tissue samples for biopsy
US6802843B2 (en) 2001-09-13 2004-10-12 Csaba Truckai Electrosurgical working end with resistive gradient electrodes
US7070597B2 (en) 2001-10-18 2006-07-04 Surgrx, Inc. Electrosurgical working end for controlled energy delivery
US7112201B2 (en) 2001-10-22 2006-09-26 Surgrx Inc. Electrosurgical instrument and method of use
US9149326B2 (en) 2001-10-22 2015-10-06 Ethicon Endo-Surgery, Inc. Electrosurgical instrument and method
US7041102B2 (en) 2001-10-22 2006-05-09 Surgrx, Inc. Electrosurgical working end with replaceable cartridges
US7083619B2 (en) 2001-10-22 2006-08-01 Surgrx, Inc. Electrosurgical instrument and method of use
US7011657B2 (en) 2001-10-22 2006-03-14 Surgrx, Inc. Jaw structure for electrosurgical instrument and method of use
US7189233B2 (en) 2001-10-22 2007-03-13 Surgrx, Inc. Electrosurgical instrument
US6929644B2 (en) 2001-10-22 2005-08-16 Surgrx Inc. Electrosurgical jaw structure for controlled energy delivery
US7186253B2 (en) 2001-10-22 2007-03-06 Surgrx, Inc. Electrosurgical jaw structure for controlled energy delivery
US6905497B2 (en) 2001-10-22 2005-06-14 Surgrx, Inc. Jaw structure for electrosurgical instrument
US7981113B2 (en) 2001-10-22 2011-07-19 Surgrx, Inc. Electrosurgical instrument
US7354440B2 (en) 2001-10-22 2008-04-08 Surgrx, Inc. Electrosurgical instrument and method of use
US7381209B2 (en) 2001-10-22 2008-06-03 Surgrx, Inc. Electrosurgical instrument
US6926716B2 (en) 2001-11-09 2005-08-09 Surgrx Inc. Electrosurgical instrument
US7364577B2 (en) 2002-02-11 2008-04-29 Sherwood Services Ag Vessel sealing system
US8075558B2 (en) 2002-04-30 2011-12-13 Surgrx, Inc. Electrosurgical instrument and method
US7749217B2 (en) 2002-05-06 2010-07-06 Covidien Ag Method and system for optically detecting blood and controlling a generator during electrosurgery
US7087054B2 (en) 2002-10-01 2006-08-08 Surgrx, Inc. Electrosurgical instrument and method of use
US8523855B2 (en) 2002-12-10 2013-09-03 Covidien Ag Circuit for controlling arc energy from an electrosurgical generator
US7044948B2 (en) 2002-12-10 2006-05-16 Sherwood Services Ag Circuit for controlling arc energy from an electrosurgical generator
US7824400B2 (en) 2002-12-10 2010-11-02 Covidien Ag Circuit for controlling arc energy from an electrosurgical generator
US7255694B2 (en) 2002-12-10 2007-08-14 Sherwood Services Ag Variable output crest factor electrosurgical generator
US20040138654A1 (en) * 2003-01-09 2004-07-15 Gyrus Medical Limited Electrosurgical generator
US7195627B2 (en) 2003-01-09 2007-03-27 Gyrus Medical Limited Electrosurgical generator
US20070173808A1 (en) * 2003-01-09 2007-07-26 Gyrus Medical Limited Electrosurgical generator
US7717910B2 (en) 2003-01-09 2010-05-18 Gyrus Medical Limited Electrosurgical generator
US7211081B2 (en) 2003-01-09 2007-05-01 Gyrus Medical Limited Electrosurgical generator
US7169146B2 (en) 2003-02-14 2007-01-30 Surgrx, Inc. Electrosurgical probe and method of use
US8303580B2 (en) 2003-05-01 2012-11-06 Covidien Ag Method and system for programming and controlling an electrosurgical generator system
US8298223B2 (en) 2003-05-01 2012-10-30 Covidien Ag Method and system for programming and controlling an electrosurgical generator system
US8080008B2 (en) 2003-05-01 2011-12-20 Covidien Ag Method and system for programming and controlling an electrosurgical generator system
US7722601B2 (en) 2003-05-01 2010-05-25 Covidien Ag Method and system for programming and controlling an electrosurgical generator system
US8267929B2 (en) 2003-05-01 2012-09-18 Covidien Ag Method and system for programming and controlling an electrosurgical generator system
US8012150B2 (en) 2003-05-01 2011-09-06 Covidien Ag Method and system for programming and controlling an electrosurgical generator system
US8104956B2 (en) 2003-10-23 2012-01-31 Covidien Ag Thermocouple measurement circuit
US8808161B2 (en) 2003-10-23 2014-08-19 Covidien Ag Redundant temperature monitoring in electrosurgical systems for safety mitigation
US8647340B2 (en) 2003-10-23 2014-02-11 Covidien Ag Thermocouple measurement system
US9768373B2 (en) 2003-10-30 2017-09-19 Covidien Ag Switched resonant ultrasonic power amplifier system
US8485993B2 (en) 2003-10-30 2013-07-16 Covidien Ag Switched resonant ultrasonic power amplifier system
US7396336B2 (en) 2003-10-30 2008-07-08 Sherwood Services Ag Switched resonant ultrasonic power amplifier system
US8096961B2 (en) 2003-10-30 2012-01-17 Covidien Ag Switched resonant ultrasonic power amplifier system
US8113057B2 (en) 2003-10-30 2012-02-14 Covidien Ag Switched resonant ultrasonic power amplifier system
US8966981B2 (en) 2003-10-30 2015-03-03 Covidien Ag Switched resonant ultrasonic power amplifier system
US7309849B2 (en) 2003-11-19 2007-12-18 Surgrx, Inc. Polymer compositions exhibiting a PTC property and methods of fabrication
US7131860B2 (en) 2003-11-20 2006-11-07 Sherwood Services Ag Connector systems for electrosurgical generator
US7416437B2 (en) 2003-11-20 2008-08-26 Sherwood Services Ag Connector systems for electrosurgical generator
US7766693B2 (en) 2003-11-20 2010-08-03 Covidien Ag Connector systems for electrosurgical generator
US7300435B2 (en) 2003-11-21 2007-11-27 Sherwood Services Ag Automatic control system for an electrosurgical generator
US7632269B2 (en) 2004-01-16 2009-12-15 Ethicon Endo-Surgery, Inc. Electrosurgical instrument with replaceable cartridge
US7766905B2 (en) 2004-02-12 2010-08-03 Covidien Ag Method and system for continuity testing of medical electrodes
US7780662B2 (en) 2004-03-02 2010-08-24 Covidien Ag Vessel sealing system using capacitive RF dielectric heating
US7955331B2 (en) 2004-03-12 2011-06-07 Ethicon Endo-Surgery, Inc. Electrosurgical instrument and method of use
US7226447B2 (en) 2004-06-23 2007-06-05 Smith & Nephew, Inc. Electrosurgical generator
US20060027553A1 (en) * 2004-08-09 2006-02-09 Hanisko Francis D Heater for endodontic condenser
US8025660B2 (en) 2004-10-13 2011-09-27 Covidien Ag Universal foot switch contact port
US7628786B2 (en) 2004-10-13 2009-12-08 Covidien Ag Universal foot switch contact port
US8192432B2 (en) 2005-03-16 2012-06-05 Microline Surgical, Inc. Integrated metalized ceramic heating element for use in a tissue cutting and sealing device
WO2006102018A2 (en) 2005-03-16 2006-09-28 Starion Instruments Corporation Integrated metalized ceramic heating element for use in a tissue cutting and sealing device
US20060212030A1 (en) * 2005-03-16 2006-09-21 Mcgaffigan Thomas H Integrated metalized ceramic heating element for use in a tissue cutting and sealing device
US20090198224A1 (en) * 2005-03-16 2009-08-06 Starion Instruments Integrated Metalized Ceramic Heating Element for Use in a Tissue Cutting and Sealing Device
US7771424B2 (en) 2005-03-16 2010-08-10 Starion Instruments Integrated metalized ceramic heating element for use in a tissue cutting and sealing device
US9474564B2 (en) 2005-03-31 2016-10-25 Covidien Ag Method and system for compensating for external impedance of an energy carrying component when controlling an electrosurgical generator
US7655003B2 (en) 2005-06-22 2010-02-02 Smith & Nephew, Inc. Electrosurgical power control
US8052675B2 (en) 2005-06-22 2011-11-08 Smith & Nephew, Inc. Electrosurgical power control
US20100121317A1 (en) * 2005-06-22 2010-05-13 Smith & Nephew, Inc. Electrosurgical Power Control
US8348934B2 (en) 2005-06-22 2013-01-08 Smith & Nephew, Inc. Electrosurgical power control
US8603082B2 (en) 2005-06-22 2013-12-10 Smith & Nephew, Inc. Electrosurgical power control
US9522032B2 (en) 2005-10-21 2016-12-20 Covidien Ag Circuit and method for reducing stored energy in an electrosurgical generator
US8734438B2 (en) 2005-10-21 2014-05-27 Covidien Ag Circuit and method for reducing stored energy in an electrosurgical generator
US8241278B2 (en) 2005-12-12 2012-08-14 Covidien Ag Laparoscopic apparatus for performing electrosurgical procedures
US7947039B2 (en) 2005-12-12 2011-05-24 Covidien Ag Laparoscopic apparatus for performing electrosurgical procedures
US8187262B2 (en) 2006-01-24 2012-05-29 Covidien Ag Dual synchro-resonant electrosurgical apparatus with bi-directional magnetic coupling
US8216223B2 (en) 2006-01-24 2012-07-10 Covidien Ag System and method for tissue sealing
US8475447B2 (en) 2006-01-24 2013-07-02 Covidien Ag System and method for closed loop monitoring of monopolar electrosurgical apparatus
US8202271B2 (en) 2006-01-24 2012-06-19 Covidien Ag Dual synchro-resonant electrosurgical apparatus with bi-directional magnetic coupling
US7513896B2 (en) 2006-01-24 2009-04-07 Covidien Ag Dual synchro-resonant electrosurgical apparatus with bi-directional magnetic coupling
US8147485B2 (en) 2006-01-24 2012-04-03 Covidien Ag System and method for tissue sealing
US8267928B2 (en) 2006-01-24 2012-09-18 Covidien Ag System and method for closed loop monitoring of monopolar electrosurgical apparatus
US9642665B2 (en) 2006-01-24 2017-05-09 Covidien Ag Method and system for controlling an output of a radio-frequency medical generator having an impedance based control algorithm
US7927328B2 (en) 2006-01-24 2011-04-19 Covidien Ag System and method for closed loop monitoring of monopolar electrosurgical apparatus
US7972328B2 (en) 2006-01-24 2011-07-05 Covidien Ag System and method for tissue sealing
US8663214B2 (en) 2006-01-24 2014-03-04 Covidien Ag Method and system for controlling an output of a radio-frequency medical generator having an impedance based control algorithm
US9186200B2 (en) 2006-01-24 2015-11-17 Covidien Ag System and method for tissue sealing
US8685016B2 (en) 2006-01-24 2014-04-01 Covidien Ag System and method for tissue sealing
US7972332B2 (en) 2006-03-03 2011-07-05 Covidien Ag System and method for controlling electrosurgical snares
US7651493B2 (en) 2006-03-03 2010-01-26 Covidien Ag System and method for controlling electrosurgical snares
US7648499B2 (en) 2006-03-21 2010-01-19 Covidien Ag System and method for generating radio frequency energy
US8556890B2 (en) 2006-04-24 2013-10-15 Covidien Ag Arc based adaptive control system for an electrosurgical unit
US9119624B2 (en) 2006-04-24 2015-09-01 Covidien Ag ARC based adaptive control system for an electrosurgical unit
US7651492B2 (en) 2006-04-24 2010-01-26 Covidien Ag Arc based adaptive control system for an electrosurgical unit
US8753334B2 (en) 2006-05-10 2014-06-17 Covidien Ag System and method for reducing leakage current in an electrosurgical generator
US8034049B2 (en) 2006-08-08 2011-10-11 Covidien Ag System and method for measuring initial tissue impedance
US7731717B2 (en) 2006-08-08 2010-06-08 Covidien Ag System and method for controlling RF output during tissue sealing
US20110166567A1 (en) * 2006-09-01 2011-07-07 Applied Medical Resources Corporation Monopolar electrosurgical return electrode
US8048068B2 (en) 2006-09-01 2011-11-01 Applied Medical Resources Corporation Monopolar electrosurgical return electrode
US7909819B2 (en) 2006-09-01 2011-03-22 Applied Medical Resources Corporation Monopolar electrosurgical return electrode
US20080058792A1 (en) * 2006-09-01 2008-03-06 Applied Medical Resources Corporation Monopolar electrosurgical return electrode
US7637907B2 (en) 2006-09-19 2009-12-29 Covidien Ag System and method for return electrode monitoring
US7794457B2 (en) 2006-09-28 2010-09-14 Covidien Ag Transformer for RF voltage sensing
US8231616B2 (en) 2006-09-28 2012-07-31 Covidien Ag Transformer for RF voltage sensing
US8777941B2 (en) 2007-05-10 2014-07-15 Covidien Lp Adjustable impedance electrosurgical electrodes
US7834484B2 (en) 2007-07-16 2010-11-16 Tyco Healthcare Group Lp Connection cable and method for activating a voltage-controlled generator
US8216220B2 (en) 2007-09-07 2012-07-10 Tyco Healthcare Group Lp System and method for transmission of combined data stream
US8353905B2 (en) 2007-09-07 2013-01-15 Covidien Lp System and method for transmission of combined data stream
US8512332B2 (en) 2007-09-21 2013-08-20 Covidien Lp Real-time arc control in electrosurgical generators
US9271790B2 (en) 2007-09-21 2016-03-01 Coviden Lp Real-time arc control in electrosurgical generators
US8142425B2 (en) 2007-10-30 2012-03-27 Hemostatix Medical Techs, LLC Hemostatic surgical blade, system and method of blade manufacture
US20090112200A1 (en) * 2007-10-30 2009-04-30 Hemostatix Medical Technologies Llc Hemostatic surgical blade, system and method of blade manufacture
US20110099742A1 (en) * 2008-05-30 2011-05-05 Hot Edge Oy Heated Ice Scraper
US8226639B2 (en) 2008-06-10 2012-07-24 Tyco Healthcare Group Lp System and method for output control of electrosurgical generator
US8486061B2 (en) 2009-01-12 2013-07-16 Covidien Lp Imaginary impedance process monitoring and intelligent shut-off
US9265556B2 (en) 2009-04-17 2016-02-23 Domain Surgical, Inc. Thermally adjustable surgical tool, balloon catheters and sculpting of biologic materials
US8523851B2 (en) 2009-04-17 2013-09-03 Domain Surgical, Inc. Inductively heated multi-mode ultrasonic surgical tool
US9730749B2 (en) 2009-04-17 2017-08-15 Domain Surgical, Inc. Surgical scalpel with inductively heated regions
US8491578B2 (en) * 2009-04-17 2013-07-23 Domain Surgical, Inc. Inductively heated multi-mode bipolar surgical tool
US8506561B2 (en) 2009-04-17 2013-08-13 Domain Surgical, Inc. Catheter with inductively heated regions
US9549774B2 (en) 2009-04-17 2017-01-24 Domain Surgical, Inc. System and method of controlling power delivery to a surgical instrument
US20100268211A1 (en) * 2009-04-17 2010-10-21 Kim Manwaring Inductively Heated Multi-Mode Bipolar Surgical Tool
US8414569B2 (en) 2009-04-17 2013-04-09 Domain Surgical, Inc. Method of treatment with multi-mode surgical tool
US9320560B2 (en) 2009-04-17 2016-04-26 Domain Surgical, Inc. Method for treating tissue with a ferromagnetic thermal surgical tool
US8523852B2 (en) 2009-04-17 2013-09-03 Domain Surgical, Inc. Thermally adjustable surgical tool system
US8430870B2 (en) 2009-04-17 2013-04-30 Domain Surgical, Inc. Inductively heated snare
US9107666B2 (en) 2009-04-17 2015-08-18 Domain Surgical, Inc. Thermal resecting loop
US8425503B2 (en) 2009-04-17 2013-04-23 Domain Surgical, Inc. Adjustable ferromagnetic coated conductor thermal surgical tool
US9078655B2 (en) 2009-04-17 2015-07-14 Domain Surgical, Inc. Heated balloon catheter
US9131977B2 (en) 2009-04-17 2015-09-15 Domain Surgical, Inc. Layered ferromagnetic coated conductor thermal surgical tool
US8292879B2 (en) 2009-04-17 2012-10-23 Domain Surgical, Inc. Method of treatment with adjustable ferromagnetic coated conductor thermal surgical tool
US8523850B2 (en) 2009-04-17 2013-09-03 Domain Surgical, Inc. Method for heating a surgical implement
US8377052B2 (en) 2009-04-17 2013-02-19 Domain Surgical, Inc. Surgical tool with inductively heated regions
US9265554B2 (en) 2009-04-17 2016-02-23 Domain Surgical, Inc. Thermally adjustable surgical system and method
US8372066B2 (en) 2009-04-17 2013-02-12 Domain Surgical, Inc. Inductively heated multi-mode surgical tool
US9220557B2 (en) 2009-04-17 2015-12-29 Domain Surgical, Inc. Thermal surgical tool
US9265555B2 (en) 2009-04-17 2016-02-23 Domain Surgical, Inc. Multi-mode surgical tool
US9265553B2 (en) 2009-04-17 2016-02-23 Domain Surgical, Inc. Inductively heated multi-mode surgical tool
US8419724B2 (en) 2009-04-17 2013-04-16 Domain Surgical, Inc. Adjustable ferromagnetic coated conductor thermal surgical tool
US8617151B2 (en) 2009-04-17 2013-12-31 Domain Surgical, Inc. System and method of controlling power delivery to a surgical instrument
US20110077631A1 (en) * 2009-09-28 2011-03-31 Tyco Healthcare Group Lp Electrosurgical Generator User Interface
US8652125B2 (en) 2009-09-28 2014-02-18 Covidien Lp Electrosurgical generator user interface
US8840609B2 (en) 2010-07-23 2014-09-23 Conmed Corporation Tissue fusion system and method of performing a functional verification test
US8915909B2 (en) 2011-04-08 2014-12-23 Domain Surgical, Inc. Impedance matching circuit
US9149321B2 (en) 2011-04-08 2015-10-06 Domain Surgical, Inc. System and method for cooling of a heated surgical instrument and/or surgical site and treating tissue
US8932279B2 (en) 2011-04-08 2015-01-13 Domain Surgical, Inc. System and method for cooling of a heated surgical instrument and/or surgical site and treating tissue
US8858544B2 (en) 2011-05-16 2014-10-14 Domain Surgical, Inc. Surgical instrument guide
US9526558B2 (en) 2011-09-13 2016-12-27 Domain Surgical, Inc. Sealing and/or cutting instrument
JP2015532857A (en) * 2012-09-20 2015-11-16 ミノシス セルラー デバイシズ インコーポレイテッド Device for automatically capsulotomy
US20140378968A1 (en) * 2013-06-21 2014-12-25 Boston Scientific Scimed, Inc. Medical devices for renal nerve ablation
US9872719B2 (en) 2013-07-24 2018-01-23 Covidien Lp Systems and methods for generating electrosurgical energy using a multistage power converter
US9655670B2 (en) 2013-07-29 2017-05-23 Covidien Lp Systems and methods for measuring tissue impedance through an electrosurgical cable
US9636165B2 (en) 2013-07-29 2017-05-02 Covidien Lp Systems and methods for measuring tissue impedance through an electrosurgical cable

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