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Publication numberUS3100489 A
Publication typeGrant
Publication dateAug 13, 1963
Filing dateSep 30, 1957
Priority dateSep 30, 1957
Publication numberUS 3100489 A, US 3100489A, US-A-3100489, US3100489 A, US3100489A
InventorsRussell W Bagley
Original AssigneeMedtronic Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Cautery device
US 3100489 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

Aug. 13, 1963 R. w. BAGLEY CAUTERY DEVICE Filed Sept. 30, 1957 IIIIIIIIII!!! I!!! 0 ll M 0 RL v. mm E E5 m w m Mm R% B United States Patent Filed Sept. 30, 1957, Ser. No. 687,150 6 Claims. 01. 128303.17)

This invention relates to a control unit for a radio frequency cautery instrument or the like. More particularly, this inventionrelates to the combination of an elec tro-coagulation forceps with a relay control unit for actuating cautery instruments.

It is a common practice in some surgical techniques to use radio frequency currents forthe cauterizat-ion or electro-coagulation of small blood vessels and the like. The usual practice is to control the operation of the radio frequency apparatus by a switch operated by a foot edal at the surgeons command. The use of foot pedal control has been fraught with danger, both to the patient and to the surgeon. According to prior practice, it has been necessary for the surgeon to contact the tissue to be canterized and then with his foot actuate the foot pedal switch. Often this necessitates removing his eyes from the operative field to locate the foot switch. There has been the possibility of accidental cautery of edges of incisions and adjacent tissues and the like. There has also been the possibility of burning surgeons hands. In addition, there has been the possibility of 110 volt shock dueto faulty wiring in the foot control.

It is the principal object of this invention to afford the surgeon absolute control of electro-coagulations by providing acontrol unit for radio frequency apparatus actuated by a switch in the forceps through a relay.

It is a further object of this invention to overcome the deficiencies of existing control units for radio frequency cauterizing apparatus by providing an insulated electrocoagulation forceps having a built-in control switch automatically operative from the surgeons hand through a relay control unit.

Other objects of the invention will become apparent as the description proceed-s.

To the accomplishment of the foregoing and related ends, this invention thencomprises the features hereinafter fully described and particu-larly pointed out in the claims, the following description setting forth in detail certain illustrative embodiments of the invention, these being indicative, however, of but a few of the various ways in which the principles of the invention may be employed.

The invention is illustrated by the drawings in which the same numeralsrefer to corresponding parts and in which:

FIGURE lis schematic and diagrammatic representation of a radiofrequency cauterizing circuit as used surgically in conjunction with the forceps and relay control according to this invention;

, FIGURE 2 is a side elevation of the electro-coagulat-ion [forceps according to this invention;

FIGURE 3 is a sectional view taken generally along the lines 3-3 of FIGURE 2 and in the direction of the arrows; and

.FIGUR.E 4 is a circuit diagram of the relay control unit.

Referring to FIGURE 1 of the drawings, a radio frequency cautery instrument is indicated generally at 19. This instrument is a standard device, the construction of which forms no part of this invention except that it is controlled by the forceps and relay of this invention.

Qneexample of such a conventional radio frequency apparatus is illustrated and described in United States Patent 31,100,489 Patented Aug. 13, 1963 1,841,968. It is to be understood that the contnol unit of this invention is not limited to any specific cautery instrument but may be adapted to any such present instruments.

The instrument It) is provided with a plug 11 attached to a cord 12 by which the instrument is connected to the ordinary available commercial electrical current. In most instances, this will be volt, 60 cycle alternating current, but, of course, such instruments may be adapted to operate from standard current of different voltage. The instrument is provided with a single terminal socket 0r jack 13 by means of which a radio frequency current conductor 14 may be connected to the instrument. The radio frequency line 1-4 is connected by means of a sin gle terminal socket or jack 15 to a relay control unit or box indicated generally at 16. The radio frequency instrument 10 is provided With a multiple terminal socket 17 by which it is connected through a multiple conductor cable or cord 18 to a similar multiple terminal socket 19 in the relay control unit 16 for purposes which will be explained in detail hereinafter. The instrument 10 is also provided with a single terminal jack or socket 20- through whichit is connected by means of a conductor 21 to a ground plate 22 which is in contact with the body of a patient, indicated generally at 23, for grounding the patient to the instrument to complete the path of'the radio frequency circuit.

other conductor 26 from the relay box 16 is connected in electrical contact with a switch contact element 29 disposed on the inner surface of the other arm of the forceps but electrically insulated from the forceps. Conductor Wire 26 is likewise electrically insulated from the forceps body.

The switch contacts 28 and 29 are disposed on the inside surfaces of the arms of the forceps so as to touch one another when the forceps arms are closed under pressure of the surgeons fingers to bring the tips 30 and 31 together. The curvature of the arms of the forceps is preferably such that after the tips 30 and 3:] are brought together, a slight additional pressure is required to bring the switch contacts 28 and 29' together. The conductor 25 may desirably be connected to the forceps body by means of any suitable connector member 32 riveted as at 33 or soldered, welded or otherwise secured in contact with the metal forceps body. The switch contact surface 28 is direct metallic contact with the forceps body, and is rigidly secured by means of riveting, soldering, welding or the like. The switch contact surface 29 on the other hand is provided with a conducting metallic pin 34 which extends through the side arm of the forceps and is insulated from it by means of a sleeve 35 of insulating material set in an opening in the forceps arm. The conductor '26 is soldered or otherwise suitably attached to the pin 34 of the switch contact 29. The entire surface of the forceps with the exception of the switch con-tact surfaces 28 and 29 and the forceps tips 30* and 31 are provided with an over-all pliable insulating coating of rubber or synthetic rubber-like material applied by dipping, brushing, etc. and indicated at 36. The conductor 26 is spaced and insulated from the metal of the forceps body by an intermediate layer of the insulating coating.

Referring to FIGURE 4 there is shown a circuit diagram of the relay control unit 16. A conductor 37 I carries the radio frequency current between the terminal of socket 15 and one of the terminals of the socket 24 from whence it is passed through conductor 25 to the body of the forceps 27. The relay circuit includes a 12.6 volt transformer 38 the primary of which is connected by means of conductors 39 and All to terminals .41 and 42 of the socket 19'. By this means, the primary of the transformer draws through the multi-conductor cable 18 from the power circuit of the cautery instrument it).

One side of the secondary of transformer 38 is connected in series through a conductor 43 to the choke coil 44 of a relay. The double pole, single throw switch 45 is connected by means of conductors 46 and 47 to terminals 48 and 49 of the multiple socket 19. The

switch45 is thus connected through the cable 18 to the operating circuit of the cautery instrument it to control the operation of that circuit. The contacts of switch 45 :are normally disengaged when coil 44 is deenergized and are brought into engagement when the coil is energized. The relay box is grounded through I conductor 56 to terminal 51 of the socket l9 and thence through the multiple conductor cable 18 to the ground circuit of the cautery instrument 10. r

The other side of the secondary of the transformer 38 is connected through a conductor 52, a 4 mh., 600 ma. radio frequency choke 53 and aconductor 54 to the terminal 55 of socket 24 and thence through conductor 26 to-the switch contact surface 29 on the forceps. The opposite side of relay choke coil 44 is connected through conductor 56, a 4 mh., 600 me. radio frequency choke to the metal relay box are connected across the radio frequency chokes on the low frequency relay side the circuit. I

The radio frequency choke circuit acts as a low pass filter unit to insulate the relay circuit from the high frequency radio current. The chokes have high reactanceto radio frequency current and tend to isolate radio frequency flow to prevent loss of radio frequency current to the relay circuit which is grounded. The con- ;densers 61 and 62 have low reactance to radio frequency current and tend to hold the relay circuit side of the chokes at ground potential so far as radio frequency current is. concerned. The condenser 60 has low reactance to radio frequency current and effectively shorts the control wires so far as radio frequency current is concerned.

The resistance 59 is a limiting resistance to protect the condenser against surges in current. The double pole relay switch is used as a safety factor. A single pole switch would be effective to control the cautery instrument but a double pole switch insures better contact and prolongs the life of the relay unit. Twelve vol-t current is induced in the transformer secondary coil although only 6 volt is required by the relay. However, about lralf of the voltage is lost across the radio frequency chokes which have high internal resistance.

In the operation of the control device of this invention, the patient 23 rests in-contact with plate 22 which is grounded to the cautery, instrument 10. A radio frequency circuit runs from the cautery instrument through conductor 14 to the relay box, through con.-

.ductor 37 in the relay box, through conductor '25 to the forceps, through the forceps to the patient and thence to the ground plate and conductor 21 back to the cautery'instrumeut. The relay box 16 is grounded to the cautery instrument and the relay circuit is powered from the power circuit of the cautery instrument;

The operating (radio frequency generating) circuit runs from the cautery instrument 10 to the relay box 16, through terminal 48 and conductor 46 to the switch 45 and back through'the conductor 47 and terminal 49' to the cautery instrument 10 So long as the forceps switch control circuit is open switches 45 are open and the cautery instrument is inoperative. The control circuit is powered through the tnansformer'lls' and runs from the secondary to the relay coil 44, through radio frequency choke 57, through radio frequency conductor 37 and through conductor 25 to the forceps 27 and switch contact surface $8 and thence from switch contact surface 29, through conductor 26 and radio frequency choke 53 back to the secondary of the transformer. It will be noticed thata portion of conductor 37, all of conductor 25 and a portion of the forceps 27 carry both high radio frequency current and low frequency control current. i v

The operating surgeon grasps the tissue to be cauterized between the exposed tips 30' and 31 of'the forceps 27. 'With the tissue thus grasped, he then exerts the slight additional amount of pressure required to bring contacts 28 and 29 together to close the controlswitch and complete the control circuit. Current then flows from the secondary of the transformer 38 to the relaycoil to energize its core to actuate switch 45 to close it. With switch 45 'clo'sedthe operating circuit of the radio frequency apparatus is closed. Radio frequency current is genera-ted and flows through the previously described ci-rcuitto the patient 23.

As soon as the desired coagulation has taken place, the

, surgeon relaxes his grip upon the forceps. The normal spring tension of the forceps separates the contact surfaces 28'and 2? to open the control switch and break the control circuit. Current then ceases to pass through the circuit, the relay is de energized and switch 45 is opened therebyshutting off the operating circuit of the cautery instrument. I

The surgeon is provided with immediate and absolute 7 in a conventional foot control has been eliminated. The

loss of radio frequency current to'the relay circuit during cauterization is prevented by the'radio frequency choke.

Although the construction of the device of this invention has lbeendescribed with specific reference to a 110 volt, -60 cycle alternating operating current and various circuit elements have beenidescribed by reference to their specific resistances, inductances, capacities, etc., it will be understood that this represents merely a preferred embodiment of the invention and those specifically described elements may have varying relative values.

It is apparent that many modifications and variations of this invention as herein-before set forth may be made without departing from the spiritfand scope thereof. The specific embodiments described are given by way of example only and the invention is limited only by the terms of the appended claims.

I claim: V

1. A control unit for .a radio frequency cautery instrument, said control unit comprising a forceps comprising a pair of opposed elongated forceps arms secured together at one end and adapted to be brought together at their free ends by slight pressure on the opposite arms, a pair of electrical switch contact elements positioned on the respective inside surfaces of said forceps arms intermediate of their free and secured ends, said switch elements being positioned to come into contact with each other upon application of pressure to the outside surfaces of said forceps arms, one of said switch contact elements being in direct electrical contact with the body of said forceps, the second of said switch contacts being electrically insulated airornsaid :Eorceps body, a first electrical conductor secured in electrical contact with said forceps body and first switch contact element, a second electrical conductor secured in electrical contact with said second switch con-tact element but electrically insulated from said forceps body and an insulating coating covering all of said forceps except the tree end tips and said switch contact elements, means for connecting the first conductor secured in electrical contact with said forceps body and first switch contact element to the radio frequency output terminal of said cautery instrument, a relay having an operating coil and cooperating movable and fixed contacts, said contacts being normally disengaged when said coil is deenergized and normally engaging one another when said coil is energized, means for connecting said relay contacts in the operating circuit of said cautery instrument to govern the operation thereof, a transformer having a primary and secondary, a power circuit adapted for connection to an alternating current power supply and including said primary, the secondary being connected in series with one of said forceps conductors and the operating coil of said relay, the operating coil of the relay also being connected to the other of said forceps conductors, and a low pass filter unit in the circuit between said forceps conductors and said relay.

2. A control unit according to claim 1 further characterized in that said low pass filter unit includes a parallel pair of radio frequency chokes.

3. A control unit according to claim 2 further characterized in that a pair of condensers and a ground connection are connected across the circuit containing said radio frequency chokes between the chokes and relay.

'4. A control unit according to claim 2 further characterized in that a limiting resistance and condenser in series are connected across the circuit containing said radio frequency chokes between the chokes and forceps contact elements:

5. A control unit according to claim 1 further characterized in that means are provided for grounding said low pass filter units to said cautery instrument.

6. A control unit according to claim 1 further characterized in that means are provided for connecting said power circuit to the power circuit of said caute-ry instrument.

References Cited in the file of this patent UNITED STATES PATENTS 1,071,978 Wlhite Sept. 2, 1913 2,012,937 Benoy Sept. 3, 1935

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1071978 *Sep 2, 1913 Device for removing hairs.
US2012937 *Nov 27, 1934Sep 3, 1935Beuoy George HElectrical caponizing forceps
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3643663 *Oct 15, 1969Feb 22, 1972F L FischerCoagulating instrument
US3645265 *Jun 25, 1969Feb 29, 1972Majzlin GregoryIntrauterine cauterizing device
US3653385 *Oct 20, 1970Apr 4, 1972Charles BurtonProduction of focal brain lesions by inductive heating
US3685518 *Jul 29, 1970Aug 22, 1972Aesculap Werke AgSurgical instrument for high-frequency surgery
US3752160 *Jul 15, 1971Aug 14, 1973Sybron CorpDisposable electrode switch
US3911241 *Dec 15, 1972Oct 7, 1975Neomed IncSwitching device for electro-surgical instruments
US3999552 *May 20, 1975Dec 28, 1976Universal Technology, Inc.Epilator
US4011872 *Mar 28, 1975Mar 15, 1977Olympus Optical Co., Ltd.Electrical apparatus for treating affected part in a coeloma
US4274413 *Dec 1, 1978Jun 23, 1981Hahn Robert HDepilatory tweezer
US4370980 *Mar 11, 1981Feb 1, 1983Lottick Edward AElectrocautery hemostat
US4375218 *May 26, 1981Mar 1, 1983Digeronimo Ernest MForceps, scalpel and blood coagulating surgical instrument
US4433364 *Mar 21, 1979Feb 21, 1984Noble Edward ELighted handgrip
US4552143 *Nov 22, 1982Nov 12, 1985Lottick Edward ARemovable switch electrocautery instruments
US4657018 *Oct 15, 1984Apr 14, 1987Hakky Said IAutomatic/manual resectoscope
US4681105 *Apr 18, 1983Jul 21, 1987S+T Marketing AgMicrosurgical tool
US5026370 *Jul 2, 1986Jun 25, 1991Lottick Edward AElectrocautery instrument
US5116332 *Feb 8, 1990May 26, 1992Lottick Edward AElectrocautery hemostat
US5122139 *Nov 8, 1990Jun 16, 1992Select-Medizintechnik Hermann Sutter GmbhMedical coagulation instrument
US5207691 *Nov 1, 1991May 4, 1993Medical Scientific, Inc.Electrosurgical clip applicator
US5250046 *Mar 26, 1992Oct 5, 1993Lee Curtis OHeated forceps
US5306280 *Aug 5, 1992Apr 26, 1994Ethicon, Inc.Endoscopic suture clip applying device with heater
US5396900 *Aug 17, 1993Mar 14, 1995Symbiosis CorporationEndoscopic end effectors constructed from a combination of conductive and non-conductive materials and useful for selective endoscopic cautery
US5709224 *Jun 7, 1995Jan 20, 1998Radiotherapeutics CorporationMethod and device for permanent vessel occlusion
US5810810 *Jun 6, 1995Sep 22, 1998Scimed Life Systems, Inc.Apparatus and method for sealing vascular punctures
US5954692 *Jul 9, 1997Sep 21, 1999SymbiosisEndoscopic robotic surgical tools and methods
US6041679 *Sep 19, 1994Mar 28, 2000Symbiosis CorporationEndoscopic end effectors constructed from a combination of conductive and non-conductive materials and useful for selective endoscopic cautery
US6063085 *Oct 22, 1993May 16, 2000Scimed Life Systems, Inc.Apparatus and method for sealing vascular punctures
US6077261 *Dec 31, 1997Jun 20, 2000Radiotherapeutics CorporationDevice for permanent vessel occlusion
US6086586 *Sep 14, 1998Jul 11, 2000Enable Medical CorporationBipolar tissue grasping apparatus and tissue welding method
US6235027 *Jan 21, 1999May 22, 2001Garrett D. HerzonThermal cautery surgical forceps
US6270495Feb 22, 1996Aug 7, 2001Radiotherapeutics CorporationMethod and device for enhancing vessel occlusion
US6296635May 17, 1999Oct 2, 2001Symbiosis CorporationEndoscopic robotic surgical tools and methods
US6533778 *Apr 26, 2001Mar 18, 2003Garrett D. HerzonThermal cautery surgical forceps
US6656173Apr 30, 2001Dec 2, 2003Radio Therapeutics CorporationMethod and device for enhancing vessel occlusion
US7166106 *Jun 4, 2002Jan 23, 2007Erbe Elektromedizin GmbhBipolar clamp
US7625372Aug 5, 2005Dec 1, 2009Vnus Medical Technologies, Inc.Methods and apparatus for coagulating and/or constricting hollow anatomical structures
US7824408Aug 5, 2004Nov 2, 2010Tyco Healthcare Group, LpMethods and apparatus for coagulating and/or constricting hollow anatomical structures
US7896878 *Mar 12, 2009Mar 1, 2011Coviden AgVessel sealing instrument
US7928338Feb 2, 2007Apr 19, 2011Plasma Surgical Investments Ltd.Plasma spraying device and method
US7951150Feb 22, 2010May 31, 2011Covidien AgVessel sealer and divider with rotating sealer and cutter
US8025668 *Apr 28, 2005Sep 27, 2011C. R. Bard, Inc.Medical device removal system
US8030849Sep 11, 2009Oct 4, 2011Plasma Surgical Investments LimitedPulsed plasma device and method for generating pulsed plasma
US8083738Nov 1, 2010Dec 27, 2011Tyco Healthcare Group LpMethod and apparatus for coagulating and/or constricting hollow anatomical structures
US8105325Jul 7, 2006Jan 31, 2012Plasma Surgical Investments LimitedPlasma-generating device, plasma surgical device, use of a plasma-generating device and method of generating a plasma
US8109928Jul 7, 2006Feb 7, 2012Plasma Surgical Investments LimitedPlasma-generating device, plasma surgical device and use of plasma surgical device
US8128623Oct 12, 2009Mar 6, 2012Garrett D HerzonThermal cautery surgical forceps
US8147489Feb 17, 2011Apr 3, 2012Covidien AgOpen vessel sealing instrument
US8152806 *Sep 11, 2008Apr 10, 2012Black & Black Surgical, Inc.Monopolar electrosurgical instrument
US8197633Mar 15, 2011Jun 12, 2012Covidien AgMethod for manufacturing an end effector assembly
US8257352Sep 7, 2010Sep 4, 2012Covidien AgBipolar forceps having monopolar extension
US8337494Jan 26, 2012Dec 25, 2012Plasma Surgical Investments LimitedPlasma-generating device having a plasma chamber
US8348948Jul 29, 2010Jan 8, 2013Covidien AgVessel sealing system using capacitive RF dielectric heating
US8357157Dec 7, 2011Jan 22, 2013Covidien LpMethods and apparatus for coagulating and/or constricting hollow anatomical structures
US8361061Nov 25, 2009Jan 29, 2013Covidien LpMethods and apparatus for coagulating and/or constricting hollow anatomical structures
US8361070 *Feb 19, 2007Jan 29, 2013Synergetics, Inc.Non-stick bipolar forceps
US8361072Nov 19, 2010Jan 29, 2013Covidien AgInsulating boot for electrosurgical forceps
US8366706Aug 15, 2008Feb 5, 2013Cardiodex, Ltd.Systems and methods for puncture closure
US8372072Nov 22, 2011Feb 12, 2013Cardiodex Ltd.Methods and apparatus for hemostasis following arterial catheterization
US8394095Jan 12, 2011Mar 12, 2013Covidien AgInsulating boot for electrosurgical forceps
US8394096Apr 11, 2011Mar 12, 2013Covidien AgOpen vessel sealing instrument with cutting mechanism
US8409199Dec 29, 2011Apr 2, 2013Garrett D. HerzonThermal cautery surgical forceps
US8435236Nov 21, 2005May 7, 2013Cardiodex, Ltd.Techniques for heat-treating varicose veins
US8454602May 4, 2012Jun 4, 2013Covidien LpApparatus, system, and method for performing an electrosurgical procedure
US8465487Jan 25, 2012Jun 18, 2013Plasma Surgical Investments LimitedPlasma-generating device having a throttling portion
US8523898Aug 10, 2012Sep 3, 2013Covidien LpEndoscopic electrosurgical jaws with offset knife
US8551091Mar 30, 2011Oct 8, 2013Covidien AgVessel sealing instrument with electrical cutting mechanism
US8568444Mar 7, 2012Oct 29, 2013Covidien LpMethod of transferring rotational motion in an articulating surgical instrument
US8591506Oct 16, 2012Nov 26, 2013Covidien AgVessel sealing system
US8597296Aug 31, 2012Dec 3, 2013Covidien AgBipolar forceps having monopolar extension
US8613742Jan 29, 2010Dec 24, 2013Plasma Surgical Investments LimitedMethods of sealing vessels using plasma
US8641713Sep 15, 2010Feb 4, 2014Covidien AgFlexible endoscopic catheter with ligasure
US8668689Apr 19, 2010Mar 11, 2014Covidien AgIn-line vessel sealer and divider
US8679114Apr 23, 2010Mar 25, 2014Covidien AgIncorporating rapid cooling in tissue fusion heating processes
US8721639Dec 21, 2012May 13, 2014Covidien LpMethods and apparatus for coagulating and/or constricting hollow anatomical structures
US8735766Aug 6, 2007May 27, 2014Plasma Surgical Investments LimitedCathode assembly and method for pulsed plasma generation
US8795266Dec 21, 2012Aug 5, 2014Covidien LpMethods and apparatus for coagulating and/or constricting hollow anatomical structures
USRE40863 *Oct 22, 1993Jul 21, 2009Boston Scientific Scimed, Inc.Apparatus and method for sealing vascular punctures
EP2436330A1 *Sep 30, 2011Apr 4, 2012Tyco Healthcare Group, LPVessel sealing instrument
WO1983002389A1 *Jan 10, 1983Jul 21, 1983Gerrida BoltonFacial hair removal appliance
WO1993008741A1 *Oct 14, 1992May 13, 1993Medical Scient IncElectrosurgical clip applicator
Classifications
U.S. Classification606/42, 200/505, 606/52, 606/40
International ClassificationA61B18/14, A61B18/00
Cooperative ClassificationA61B2018/00928, A61B18/1442
European ClassificationA61B18/14F