US3058470A - Apparatus for electrical highfrequency surgery - Google Patents

Apparatus for electrical highfrequency surgery Download PDF

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Publication number
US3058470A
US3058470A US653943A US65394357A US3058470A US 3058470 A US3058470 A US 3058470A US 653943 A US653943 A US 653943A US 65394357 A US65394357 A US 65394357A US 3058470 A US3058470 A US 3058470A
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Prior art keywords
relay
current
generator
output
switch
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Expired - Lifetime
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US653943A
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English (en)
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Seeliger Ernst
Sanden Kurt
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Siemens Reiniger Werke AG
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Siemens Reiniger Werke AG
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/1206—Generators therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00636—Sensing and controlling the application of energy
    • A61B2018/0066—Sensing and controlling the application of energy without feedback, i.e. open loop control

Definitions

  • the invention relates to apparatus for electrical highfrequency surgery, in which high-frequency electrical oscillations are fed selectively to active electrodes either undamped, that is, suitable for cutting, or damped and consequently suitable for coagulating.
  • a known apparatus of this type three outputs with separate power control are provided for the connection of the active electrodes.
  • the switching over from the one to the other kind of current is effected by a foot switch.
  • the switching on of the treatment current can also be effected by a foot switch or by actuating a switch fitted in a handle carrying the electrode.
  • this known apparatus it is possible for a surgeon to use the same electrode always connected to the same output alternatively for coagulation with one kind of current and. for cutting with the other kind of current (prostate-resecuon) or to carry out the cutting and coagulation with different electrodes each of which is connected to a different output of the apparatus.
  • the invention is based upon the thought that the surgeon should not be expected to manipulate the apparatus in any way during an operation, except for the unavoidable choice of the electrode and the switching on and off of the treatment current. It is, therefore, the object of the present invention to provide apparatus for electrical high-frequency surgery comprising a plurality of outputs and a current type selector cooperatively associated with each output, for the purpose of vseparately preselecting the kind of treatment current for each outut.
  • FiG. l is a circuit diagram of a rst embodiment of the invention comprising two electrode outputs and switch parts cooperatively associated with each output and assembled to form channels I ⁇ and Il, as well as a spark gap generator and a tube generator;
  • FlG. 2 is a unit-type connecting diagram of a second embodiment of the invention comprising four electrode outputs and consequently four channels I, Il, III and IV, as well as a tube generator, which supplies selectively damped or undamped high-frequency electric oscillations;
  • FlG. 3 is a circuit diagram of the second embodiment of the invention.
  • FIGS. 4, 5 and 6 show the time slope of the adjustable treatment currents in the case of the second embodiment of the invention.
  • numerals 11 and 12 designate outputs of a spark gap generator 10
  • 21 and 22 designate outputs of a vacuum tube generator 2i?, said outputs 'being grounded on one side and connected on the other side to two fixed contacts 33 and 33a, and 32 and 32a, respectively, of current selectors 30 3,058,470 Patented Get. 16, 1962 and 35i-a, respectively.
  • Output regulators 4) and 46a with regulating potentiometers 41 and 41a are respectively connected in series with the current selectors 30 and 30a by way ofassociated switch arms 31 and 31a, respectively.
  • the relay units 6i) and 60a comprise respectively the relays 61 and 61a, input chokes 63, 64, and 63a, 64a, yand sources of current 62 and 62a in series connection, and are connected on the one hand wth the inner contact rings 71 and 71a and on the other hand with outer contact rings 72 and 72a of the electrode outputs 7i) and 70a, respectively.
  • the handle il@ carrying the electrode 81 is provided with a key button '52 for closing a switch 83, 84 which in turn is connected on the one hand to the inner contact ring '71 and on the other hmd to the outer contact ring 72 of the electrode output 70.
  • Such an arrangement presents the advantage that the kinds of current and the high-frequency power desired for carrying out the surgical operation in the course of the treatment can be separately preset for each electrode before commencing an operation, so that the surgeon can, during the treatment, concentrate chiefly on the selection of the electrode for the treatment and on carrying out the treatment, and his attention is not diverted by being obliged to change the kinds of current and readjust the strength of the treatment current during the treatment.
  • the operating contacts 50a and 50 for switching on the treatment current in channels I and ll need not necessarily be controlled -f-rom each handle through the medium of separate relays 61 and 61a, respectively, but a common relay with separate contacts for the vtwo channels or a similarly constructed foot switch may be provided.
  • ⁇ switches for the treatment current need not be arranged in the channels but may be disposed in the generator circuits or in the power-supply lead to the generator-s. In the latter case a single switch for the treatment current will be sufficient in the common power-supply lead to the two generators 10 and 2t).
  • FIG. 2 designates a tube generator capable of being switched over from damped to undamped electric high-frequency oscillations, and designates an amplifier connected in series with the generator 90.
  • Parts 30, 40, 50, 60, 70 and 80 correspond to similarly designated parts of FIG. 1, that is, in the unit-type connecting diagram of FIG. 2, the selectors for the desired kind of current are designated by 30, the output regulators by 40; the operating contacts of the relay units 60, which are connected in series with the output regulators by 50, and the electrode outputs by '70 which are also provided with electrode components 80' to 84.
  • the amplifier 100 is disposed directly ahead of the electrode outputs 70.
  • the relays 61 of the relay units 60 ⁇ have operating contacts 51 which are disposed between the selectors 30 for the kind of current and the high-frequency tube generator 90. These, additional operating contacts 51 respectively connect only one current selector Conductors 67 interconnecting the relay units 60, 60a, 60h indicate that each relay unit has normal or resting contacts arranged in the relay unit circuits of the other units, the function of which will be shown in connection with FIG. 3.
  • a socket unit Iv contains, in addition to an electrode socket 70e, with an inner contact ring 71e and an outer contact ring 72C, a selector unit 110 with the aid of which the output 70C can be selectively connected to channels I, II or III.
  • the kind of current and power can be pre-set independently for each of the channels I, II and III.
  • the output 70C channel IV
  • each current ⁇ type selector 30, 30a and 3012 is provided with a multicontact switch having a movable contact arm 31 which is grounded, a iixed contact 32 which is dead, a lixed contact 33 which is connected with one of the layers of a condenser 35 and a fixed contact 34 connected with one of the layers of a condenser 36, The other layers of Ithe condensers 35 and 36 are connected to the output of the selector 30.
  • Each of the selectors 30 can be connected to the input circuit of the generator unit 90 by way of a contact 51.
  • the generator unit 90 comprises a generator tube 91 in a blocking oscillator circuit.
  • the grid of the tube 91 is connected to one of the layers of a condenser 93 and the generator input by way of a blocking choke 92.
  • the other layer of the condenser 93 is grounded.
  • One end of a resistor 94 is connected to the circuit, connecting the condenser 93 and the blocking choke 92, whereas the other end thereof is connected to the positive pole of an anode voltage source 97 by way of an operating Contact 59 of a relay 57.
  • the anode of the tube 91 is connected by Way of an oscillating circuit coil 96, which is in parallel with an oscillating circuit condenser 95, also by way of the contact 59 to the positive pole of the source of anode voltage 97, the negative pole of which is grounded.
  • the oscillating circuit coil 96 is coupled with a coil 98 having one end of its winding grounded while its other end is connected to the generator output.
  • Each output regulator 40, 40a ⁇ and L10b has a variable potentiometer or resistance 41, one end of the winding of which is grounded while the other end may be connected to the input of the corresponding output regulator through the medium of an operating contact 52 respectively controlled by a relay such as 61, 61a and 61b.
  • the slide contact 42 ofthe variable resistance 41 is connected to the output.
  • the ampli bomb 100 contains an amplier tube 101 which has its cathode grounded by way of a cathode resistor 104, and its grid grounded by Way of a blocking choke 102 forming a grid leak resistance.
  • One layer of a condenser 103 is connected to the connecting point between the grid of the tube 101 and the blocking choke 102, while the other layer of this condenser -forms the input of the amplifier 100.
  • the anode of the tube 101 is connected by Wav of a resonant circuit coil 106, which is in parallel with a resonant circuit condenser 10S, and an operating contact 58 of the relay 57 to the positive pole of a source of anode Voltage 108, the negative pole of which is grounded.
  • the resonant circuit 105, 106 is tuned to the frequency of the generator 90.
  • the resonant circuit coil 106 is coupled with a coil 107, one end of the Winding of which is grounded While its other end forms the output ofthe amplier unit.
  • Each relay unit 60, 60a and 60b comprises a relay respectively indicated at 61, 61u and 61b, one end of the Winding of each relay being respectively connected in series with a normally closed contact 54a (of on to the generator 90.
  • the relay 61 and 55h (of a relay 61h) as well as with a choke respectively indicated at 63, 63a and 63h.
  • the other end of the winding of the relay 61 (6141; 61b) is connected to the positive pole of the current source or -battery 62, the negative pole of which is connected to the blocking choke 64 64a; 64b).
  • One end of the blocking chokes 63 and 64 leads to the terminals -for a foot Switch 65.
  • a series arrangement comprising a signal lamp 66 and an operating contact 53 of the relay 61 is connecteai in parallel to the voltage source 62.
  • Parallel to the voltage source 62 is also a series arrangement comprising the relay S7 and a contact arrangement which includes parallel connected make contacts 56 (of the relay 61), 56a (of the relay 61a) and 56b (of the relay 611;).
  • Cooperatively associated with the relay 61 are normally closed contacts 54 (in the relay unit 60a) and 55 (in a relay unit 60b).
  • the selector unit in the channel IV has one end of blocking chokes 63C and 64e connected to its output 70e, the other ends of these chokes being connected to the terminals of a foot switch 65C.
  • a conductor leads from the ⁇ foot ⁇ switch terminal at the choke 64e to the foot switch terminals at the chokes 64, 64a, and 64b in each of the relay units 60, 60a and 606.
  • the selector unit 110 also comprises a multicontact switch 111 with two switch arms or wipers 112 and 113 mounted on a common pivot' but insulated from each other.
  • the wiper 112 is connected with the foot switch terminal at the choke 63e and can be set consecutively on fixed contacts 114, 115 and 116.
  • the Wiper 113 of the multicontact switch 111 is connected to the positive pole of the battery 62 and can be set consecutively on xed contacts 117, 118 and 119, of which contact 117 is connected by way of a lamp 120, contact 118 by way of a lamp .121 and contact 119 by way of a .lamp 122, to the negative pole of the source of voltage 62.
  • the circuit arrangement according to FIG. 3 operates as follows:
  • channel I is to -be preset for an undamped, uninterrupted high-frequency current suitable for cutting, the time slope of Which is shown in FIG. 4,
  • channel II is to be preset for supplying a damped high-frequency current suitable for coagulation, having 'the time slope shown in FIG. 5
  • channel III is to be preset for supplying a damped, interrupted highfrequency current suitable for coagulation, having the time slope shown in FIG. 6.
  • variable potentiometer 41 in the output regulator 40 is set for a power value suitable for carrying out a cutting operation and ythe variable potentiometers 41 in the output regulators 40a and 40b are respectively set for power values suitable for coagulation.
  • the operating contact 53 is also closed which switches on the signal lamp 66 to indicate to the surgeon that the cur-rent preset in channel I, as regards kind and power, is available on the treatment electrode 81.
  • the relay 61 is deenergized by breaking the foot switch 65 or the hand switch 82, 83, 84 in the handles 80, and the switch arrangement is thus returned into its normal position.
  • the relay 61a in the channel II may subsequently be energized.
  • the condenser 35 in the current selector 30a
  • the condenser 93 in the generator unit 90
  • the capacity in the input circuit of the generator unit 90- increases in this case to such an extent that the generator operates as blocking oscillator and produces oscilla-tions of the Itype illustrated in FIG. 5.
  • treatment currents suitable for carrying out coagulation are switched on to the treatment electrode of the channel II.
  • the operation of the signal lamp 66a indicates to the surgeon that this current is available.
  • Energization of the relays 61 and 61b in the channels I and III, respectively, is prevented by the opening of contacts 54a and 55a which are controlled by the relay 61a.
  • the kind of current and power preset for the channel III can be made available at the end of the coagulation treatment effected by the use of the channel II by the excitation of the relay 61b.
  • Actuation of the relay 61b causes the condenser 36 (in the current selector 30h) to be connected in parallel to the condenser 93 (in Vthe generator unit 90).
  • the total capacity in the input of the generator unit is then still further increased as compared with that of the previously considered treatment, so that high-frequency currents are supplied by the generator 90 having the time characteristic shown in FIG. 6.
  • interrupted treatment currents are consequently produced for carrying out coagulation, having an amplitude which periodically drops rapidly from a high initial value to zero, and in which the individual periods are separated by gaps.
  • the channel IV is intended primarily for operatively connecting electrodes to be used selectively for cutting and coagulation.
  • an electrode handle suitable for this purpose has been connected to the -outpu-t socket 70e, the operator must, before commencing the treatment, set the kind of operation, Cutting for example, in the channel I and the kind of operation Coagulation in one of the other channels II or III, vfor example, in the channel II, in the manner already described.
  • the treatment it is then only necessary to manipulate either the switch mounted in the electrode handle or the foot switch 65C for switching on the treatment current and, when changing the kind of treatment, to manipulate the multicontact switch 111 of the selector unit 110.
  • the multicontact switch 111 is set so that its switch arms or wipers 112 and 113 lie on the contacts 114 and l117 respectively
  • the hand controlled switch in the electrode handle connected to the output 7 0c, or the foot switch 65e is connected in parallel with the foot switch 65 in the channel I. Therefore, upon operating the hand or :foot switch in the channel IV, the relay 61 in the channel I is energized and, as above described, cutting current of the strength preset on the output regulator 40 is placed on the output socket 70C and consequently on the treatment electrode.
  • the switch arms 112 and 113 of the selector switch 111 must be positioned to the contacts 115 and 118 respectively.
  • an interruption of the circuit which incorporates the relay 61 a-nd which is then closed by the foot switch 65C is effected and the relay 61 in the channel I will be de-energ-ized.
  • the relay 61a in the channel II is energized by way of the switch 65C now in parallel with the switch 65a in the channel II, and through its contacts the generator 90 is switched over in the manner described -for producing treatment currents suitable for coagulation.
  • the current strengths suitable for the cutting and also for the coagulation treatment are positively preset, a readjustment of power is not necessary after switching over from one type of treatment to the other.
  • the switch arm 113 of the selector switch 111 When the switch arm 113 of the selector switch 111 is set on the conta-ct 117, the signal lamp is actuated, Whereas the signal lamps 121 ⁇ and 122 are illuminated when the switch arm is moved over to the contacts 118 and 119 respectively. Consequently, the surgeon or operator has a means of checking the correct channel selection.
  • the pairs of signal lamps 66/120, 66a/'121 and 66b/122 may be provided with different channel markings or different color characteristics.
  • the current supply is effected in the examples above described by batteries to simplify the illustration thereof, but it is obvious that it can also be made available with a -power unit which is arranged -for connecting to direct current mains and/or alternating current mains.
  • Apparat-us for electrical high-frequency surgery comprising generator means for producing damped and nndamped electric oscillations, said generator means including an oscillator stage and a power stage, a plurality of outputs operatively connected to said generator means for connecting a plurality of active treatment electrodes to said apparatus, means cooperatively associated with each of said outputs Lfor preselecting a desired treatment current form attainable by ⁇ said generator means, means cooperatively associated with each of said outputs for preselecting the power to be respectively delivered thereby, said power preselecting means being interposed in parallel between the oscillator stage and the power stage of said generator means, and switching means cooperatively associated with each output for connecting the high frequency current of preselected oscillation yform and power to said output.
  • Apparatus for electrical high-frequency surgery comprising generator means for producing damped and undamped electric oscillations, a plurality of outputs operatively connected to said generator'means for connecting a plurality of ⁇ active treatment electrodes to said apparatus, means cooperatively associated with each of said outputs for preselecting a desired treatment current form attainable by said generator means, means cooperatvely associated with each of said outputs for preselecting the power to be respectively delivered thereby, and switching means cooperatively associated with leach output for connecting .the high frequency current of preselected oscillation form and power to said output, a relay included in the switching means cooperatively associated with each output, a make contact controlled by one of said relays and disposed in the corresponding output circuit, and normally closed contact means also controlled by said relay and respectively disposed in series with windings of relays Vcooperatively associated with the other outputs.
  • Surgical apparatus operating with high frequency oscillations comprising generator means for producing at least two kinds of electrical high frequency oscillations, namely, damped and undamped oscillations, means operatively connected to said generator means forming a plurality of outputs for the high frequency energy thereof, each output assigned to one of a plurality of active surgical electrodes, a plurality of current-type selectors corresponding in number to the number of outputs, an output regulator and relay means for control by the operator, said current-type selectors being operative to select the generator means for the production of the type of current for the respective output, said ouput regulator controlling the magnitude of the high frequency energy to be transmitted from the selected generator means to the respective output and said relays being operative to connect over the contacts thereof the selected generator means with the adjusted output at the respectively assigned output, a relay operatively controlled by the operator for each output for the high frequency energy, each such relay comprising make contact means for connecting the selected generator means with the respective output and comprising normal contace means corresponding in number to the number of outputs for the high frequency
US653943A 1956-04-26 1957-04-19 Apparatus for electrical highfrequency surgery Expired - Lifetime US3058470A (en)

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DES48490A DE1040714B (de) 1956-04-26 1956-04-26 Einrichtung zur elektrischen Hochfrequenzchirurgie

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BE (1) BE556940A (xx)
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DE (1) DE1040714B (xx)
FR (1) FR1172499A (xx)
GB (1) GB816720A (xx)

Cited By (92)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3196877A (en) * 1962-11-14 1965-07-27 Corbin Farnsworth Inc Defibrillation electrode device
US3384090A (en) * 1962-07-23 1968-05-21 Manfredi Angelo Method and apparatus for treatment of the deafness, caused by diseases of the middleand internal ear
US3389704A (en) * 1965-12-06 1968-06-25 Zenith Radio Corp Discharge circuit for a defibrillator
US3494363A (en) * 1969-04-01 1970-02-10 Technical Resources Inc Control for devices used in surgery
US3636943A (en) * 1967-10-27 1972-01-25 Ultrasonic Systems Ultrasonic cauterization
US3653385A (en) * 1970-10-20 1972-04-04 Charles Burton Production of focal brain lesions by inductive heating
US3675655A (en) * 1970-02-04 1972-07-11 Electro Medical Systems Inc Method and apparatus for high frequency electric surgery
US3730188A (en) * 1971-03-24 1973-05-01 I Ellman Electrosurgical apparatus for dental use
US3804096A (en) * 1972-11-30 1974-04-16 Dentsply Int Inc Electrosurgical device
US3812858A (en) * 1972-10-24 1974-05-28 Sybron Corp Dental electrosurgical unit
US3952748A (en) * 1974-07-18 1976-04-27 Minnesota Mining And Manufacturing Company Electrosurgical system providing a fulguration current
US3961630A (en) * 1973-11-12 1976-06-08 Dentsply Research & Development Corporation Protective circuit for radio-frequency electrosurgical device
US3989952A (en) * 1973-08-06 1976-11-02 Siemens Aktiengesellschaft Dental apparatus
US4038984A (en) * 1970-02-04 1977-08-02 Electro Medical Systems, Inc. Method and apparatus for high frequency electric surgery
US4041952A (en) * 1976-03-04 1977-08-16 Valleylab, Inc. Electrosurgical forceps
US4188927A (en) * 1978-01-12 1980-02-19 Valleylab, Inc. Multiple source electrosurgical generator
US4211230A (en) * 1978-07-31 1980-07-08 Sybron Corporation Electrosurgical coagulation
WO1982000413A1 (en) * 1980-07-28 1982-02-18 Lab Abbott Improved radiopaque medical tubing
WO1982000414A1 (en) * 1980-08-08 1982-02-18 Corp R2 Physiological electrode systems
US4510937A (en) * 1983-10-28 1985-04-16 International Medical Electronics, Ltd. Method and apparatus for operating dual diathermy applicator heads in close proximity to one another
US4590934A (en) * 1983-05-18 1986-05-27 Jerry L. Malis Bipolar cutter/coagulator
US4739759A (en) * 1985-02-26 1988-04-26 Concept, Inc. Microprocessor controlled electrosurgical generator
US4827927A (en) * 1984-12-26 1989-05-09 Valleylab, Inc. Apparatus for changing the output power level of an electrosurgical generator while remaining in the sterile field of a surgical procedure
US20040092927A1 (en) * 2002-11-05 2004-05-13 Podhajsky Ronald J. Electrosurgical pencil having a single button variable control
US20050222566A1 (en) * 2001-03-30 2005-10-06 Japan Medical Dynamic Marketing, Inc. Electromagnetic field surgical device and method
US20060041257A1 (en) * 2003-11-20 2006-02-23 Sartor Joe D Electrosurgical pencil with improved controls
US7044948B2 (en) 2002-12-10 2006-05-16 Sherwood Services Ag Circuit for controlling arc energy from an electrosurgical generator
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
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USRE40388E1 (en) 1997-04-09 2008-06-17 Covidien Ag Electrosurgical generator with adaptive power control
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US20090062786A1 (en) * 2007-08-30 2009-03-05 Garito Jon C Tri-frequency electrosurgical instrument
US7513896B2 (en) 2006-01-24 2009-04-07 Covidien Ag Dual synchro-resonant electrosurgical apparatus with bi-directional magnetic coupling
US20090248010A1 (en) * 2008-03-31 2009-10-01 Monte Fry Electrosurgical Pencil Including Improved Controls
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US8486061B2 (en) 2009-01-12 2013-07-16 Covidien Lp Imaginary impedance process monitoring and intelligent shut-off
US8506565B2 (en) 2007-08-23 2013-08-13 Covidien Lp Electrosurgical device with LED adapter
US8512332B2 (en) 2007-09-21 2013-08-20 Covidien Lp Real-time arc control in electrosurgical generators
US8597292B2 (en) 2008-03-31 2013-12-03 Covidien Lp Electrosurgical pencil including improved controls
US8636733B2 (en) 2008-03-31 2014-01-28 Covidien Lp Electrosurgical pencil including improved controls
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
US8668688B2 (en) 2006-05-05 2014-03-11 Covidien Ag Soft tissue RF transection and resection device
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
US9186200B2 (en) 2006-01-24 2015-11-17 Covidien Ag System and method for tissue sealing
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
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
US10492849B2 (en) 2013-03-15 2019-12-03 Cynosure, Llc Surgical instruments and systems with multimodes of treatments and electrosurgical operation
US10716587B2 (en) 2014-06-13 2020-07-21 Surgis Medical Llc Surgical device with light
US11564732B2 (en) 2019-12-05 2023-01-31 Covidien Lp Tensioning mechanism for bipolar pencil
US11819259B2 (en) 2018-02-07 2023-11-21 Cynosure, Inc. Methods and apparatus for controlled RF treatments and RF generator system
USD1005484S1 (en) 2019-07-19 2023-11-21 Cynosure, Llc Handheld medical instrument and docking base

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4429694A (en) * 1981-07-06 1984-02-07 C. R. Bard, Inc. Electrosurgical generator
GB2456533A (en) 2008-01-16 2009-07-22 Gyrus Medical Ltd Selection method for multi-instrument electrosurgical system
DE102017109638A1 (de) * 2017-05-04 2018-11-08 Olympus Winter & Ibe Gmbh Generator für die Abgabe hochfrequenten Wechselstroms an ein Medizininstrument

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1645215A (en) * 1925-11-14 1927-10-11 Frederick E Bauer Electrical surgical apparatus
US1695485A (en) * 1924-08-06 1928-12-18 Wappler Electric Company Inc Electrosurgical apparatus
US1752632A (en) * 1927-03-23 1930-04-01 Beaumont Julien De Apparatus for producing electric waves
US1863118A (en) * 1927-10-31 1932-06-14 Liebel Flarsheim Co Surgeon's instrument
US1945867A (en) * 1932-04-27 1934-02-06 Technical Equipment Company High frequency oscillatory apparatus for electrotherapeutic and sterilization purposes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1695485A (en) * 1924-08-06 1928-12-18 Wappler Electric Company Inc Electrosurgical apparatus
US1645215A (en) * 1925-11-14 1927-10-11 Frederick E Bauer Electrical surgical apparatus
US1752632A (en) * 1927-03-23 1930-04-01 Beaumont Julien De Apparatus for producing electric waves
US1863118A (en) * 1927-10-31 1932-06-14 Liebel Flarsheim Co Surgeon's instrument
US1945867A (en) * 1932-04-27 1934-02-06 Technical Equipment Company High frequency oscillatory apparatus for electrotherapeutic and sterilization purposes

Cited By (149)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3384090A (en) * 1962-07-23 1968-05-21 Manfredi Angelo Method and apparatus for treatment of the deafness, caused by diseases of the middleand internal ear
US3196877A (en) * 1962-11-14 1965-07-27 Corbin Farnsworth Inc Defibrillation electrode device
US3389704A (en) * 1965-12-06 1968-06-25 Zenith Radio Corp Discharge circuit for a defibrillator
US3862630A (en) * 1967-10-27 1975-01-28 Ultrasonic Systems Ultrasonic surgical methods
US3636943A (en) * 1967-10-27 1972-01-25 Ultrasonic Systems Ultrasonic cauterization
US3898992A (en) * 1967-10-27 1975-08-12 Ultrasonic Systems Ultrasonic surgical methods
US3494363A (en) * 1969-04-01 1970-02-10 Technical Resources Inc Control for devices used in surgery
US4038984A (en) * 1970-02-04 1977-08-02 Electro Medical Systems, Inc. Method and apparatus for high frequency electric surgery
US3675655A (en) * 1970-02-04 1972-07-11 Electro Medical Systems Inc Method and apparatus for high frequency electric surgery
US3653385A (en) * 1970-10-20 1972-04-04 Charles Burton Production of focal brain lesions by inductive heating
US3730188A (en) * 1971-03-24 1973-05-01 I Ellman Electrosurgical apparatus for dental use
US3812858A (en) * 1972-10-24 1974-05-28 Sybron Corp Dental electrosurgical unit
US3804096A (en) * 1972-11-30 1974-04-16 Dentsply Int Inc Electrosurgical device
US3989952A (en) * 1973-08-06 1976-11-02 Siemens Aktiengesellschaft Dental apparatus
US3961630A (en) * 1973-11-12 1976-06-08 Dentsply Research & Development Corporation Protective circuit for radio-frequency electrosurgical device
US3952748A (en) * 1974-07-18 1976-04-27 Minnesota Mining And Manufacturing Company Electrosurgical system providing a fulguration current
US4041952A (en) * 1976-03-04 1977-08-16 Valleylab, Inc. Electrosurgical forceps
US4188927A (en) * 1978-01-12 1980-02-19 Valleylab, Inc. Multiple source electrosurgical generator
US4211230A (en) * 1978-07-31 1980-07-08 Sybron Corporation Electrosurgical coagulation
WO1982000413A1 (en) * 1980-07-28 1982-02-18 Lab Abbott Improved radiopaque medical tubing
WO1982000414A1 (en) * 1980-08-08 1982-02-18 Corp R2 Physiological electrode systems
US4590934A (en) * 1983-05-18 1986-05-27 Jerry L. Malis Bipolar cutter/coagulator
US4510937A (en) * 1983-10-28 1985-04-16 International Medical Electronics, Ltd. Method and apparatus for operating dual diathermy applicator heads in close proximity to one another
US4827927A (en) * 1984-12-26 1989-05-09 Valleylab, Inc. Apparatus for changing the output power level of an electrosurgical generator while remaining in the sterile field of a surgical procedure
US4739759A (en) * 1985-02-26 1988-04-26 Concept, Inc. Microprocessor controlled electrosurgical generator
USRE40388E1 (en) 1997-04-09 2008-06-17 Covidien Ag Electrosurgical generator with adaptive power control
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
US7901400B2 (en) 1998-10-23 2011-03-08 Covidien Ag Method and system for controlling output of RF medical generator
US9113900B2 (en) 1998-10-23 2015-08-25 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
US7303557B2 (en) 1998-10-23 2007-12-04 Sherwood Services Ag Vessel sealing system
US20050222566A1 (en) * 2001-03-30 2005-10-06 Japan Medical Dynamic Marketing, Inc. Electromagnetic field surgical device and method
US7364577B2 (en) 2002-02-11 2008-04-29 Sherwood Services Ag Vessel sealing system
US7749217B2 (en) 2002-05-06 2010-07-06 Covidien Ag Method and system for optically detecting blood and controlling a generator during electrosurgery
US8016824B2 (en) 2002-07-25 2011-09-13 Covidien Ag Electrosurgical pencil with drag sensing capability
US7393354B2 (en) 2002-07-25 2008-07-01 Sherwood Services Ag Electrosurgical pencil with drag sensing capability
US7621909B2 (en) 2002-07-25 2009-11-24 Covidien Ag Electrosurgical pencil with drag sensing capability
US7244257B2 (en) 2002-11-05 2007-07-17 Sherwood Services Ag Electrosurgical pencil having a single button variable control
US8128622B2 (en) 2002-11-05 2012-03-06 Covidien Ag Electrosurgical pencil having a single button variable control
US20040092927A1 (en) * 2002-11-05 2004-05-13 Podhajsky Ronald J. Electrosurgical pencil having a single button variable control
US7255694B2 (en) 2002-12-10 2007-08-14 Sherwood Services Ag Variable output crest factor electrosurgical generator
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
US7235072B2 (en) 2003-02-20 2007-06-26 Sherwood Services Ag Motion detector for controlling electrosurgical output
US7955327B2 (en) 2003-02-20 2011-06-07 Covidien Ag Motion detector for controlling electrosurgical output
US8012150B2 (en) 2003-05-01 2011-09-06 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
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
US8267929B2 (en) 2003-05-01 2012-09-18 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
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
US8104956B2 (en) 2003-10-23 2012-01-31 Covidien Ag Thermocouple measurement circuit
US8966981B2 (en) 2003-10-30 2015-03-03 Covidien Ag Switched resonant ultrasonic power amplifier system
US8096961B2 (en) 2003-10-30 2012-01-17 Covidien Ag Switched resonant ultrasonic power amplifier system
US8485993B2 (en) 2003-10-30 2013-07-16 Covidien Ag Switched resonant ultrasonic power amplifier system
US8113057B2 (en) 2003-10-30 2012-02-14 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
US9768373B2 (en) 2003-10-30 2017-09-19 Covidien Ag Switched resonant ultrasonic power amplifier system
US7241294B2 (en) 2003-11-19 2007-07-10 Sherwood Services Ag Pistol grip electrosurgical pencil with manual aspirator/irrigator and methods of using the same
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US7503917B2 (en) 2003-11-20 2009-03-17 Covidien Ag Electrosurgical pencil with improved controls
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US7131860B2 (en) 2003-11-20 2006-11-07 Sherwood Services Ag Connector systems for electrosurgical generator
US7959633B2 (en) 2003-11-20 2011-06-14 Covidien Ag Electrosurgical pencil with improved controls
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US7780662B2 (en) 2004-03-02 2010-08-24 Covidien Ag Vessel sealing system using capacitive RF dielectric heating
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US8267928B2 (en) 2006-01-24 2012-09-18 Covidien Ag System and method for closed loop monitoring of monopolar electrosurgical apparatus
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US8685016B2 (en) 2006-01-24 2014-04-01 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
US7972328B2 (en) 2006-01-24 2011-07-05 Covidien Ag System and method for tissue sealing
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
US20090237169A1 (en) * 2006-01-24 2009-09-24 Covidien Ag Dual Synchro-Resonant Electrosurgical Apparatus With Bi-Directional Magnetic Coupling
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
US7651492B2 (en) 2006-04-24 2010-01-26 Covidien Ag Arc based adaptive control system for an electrosurgical unit
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
US8668688B2 (en) 2006-05-05 2014-03-11 Covidien Ag Soft tissue RF transection and resection device
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
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
US8506565B2 (en) 2007-08-23 2013-08-13 Covidien Lp Electrosurgical device with LED adapter
US8998891B2 (en) * 2007-08-30 2015-04-07 Ellman International, Inc. Tri-frequency electrosurgical instrument
US20090062786A1 (en) * 2007-08-30 2009-03-05 Garito Jon C Tri-frequency electrosurgical instrument
US8353905B2 (en) 2007-09-07 2013-01-15 Covidien Lp System and method for transmission of combined data stream
US8216220B2 (en) 2007-09-07 2012-07-10 Tyco Healthcare Group Lp System and method for transmission of combined data stream
US9271790B2 (en) 2007-09-21 2016-03-01 Coviden Lp Real-time arc control in electrosurgical generators
US8512332B2 (en) 2007-09-21 2013-08-20 Covidien Lp Real-time arc control in electrosurgical generators
US8235987B2 (en) 2007-12-05 2012-08-07 Tyco Healthcare Group Lp Thermal penetration and arc length controllable electrosurgical pencil
US8945124B2 (en) 2007-12-05 2015-02-03 Covidien Lp Thermal penetration and arc length controllable electrosurgical pencil
US8591509B2 (en) 2008-03-31 2013-11-26 Covidien Lp Electrosurgical pencil including improved controls
US20090248010A1 (en) * 2008-03-31 2009-10-01 Monte Fry Electrosurgical Pencil Including Improved Controls
US8597292B2 (en) 2008-03-31 2013-12-03 Covidien Lp Electrosurgical pencil including improved controls
US9198720B2 (en) 2008-03-31 2015-12-01 Covidien Lp Electrosurgical pencil including improved controls
US8663218B2 (en) 2008-03-31 2014-03-04 Covidien Lp Electrosurgical pencil including improved controls
US8632536B2 (en) 2008-03-31 2014-01-21 Covidien Lp Electrosurgical pencil including improved controls
US8663219B2 (en) 2008-03-31 2014-03-04 Covidien Lp Electrosurgical pencil including improved controls
US8636733B2 (en) 2008-03-31 2014-01-28 Covidien Lp Electrosurgical pencil including improved controls
US8226639B2 (en) 2008-06-10 2012-07-24 Tyco Healthcare Group Lp System and method for output control of electrosurgical generator
US8162937B2 (en) 2008-06-27 2012-04-24 Tyco Healthcare Group Lp High volume fluid seal for electrosurgical handpiece
US8486061B2 (en) 2009-01-12 2013-07-16 Covidien Lp Imaginary impedance process monitoring and intelligent shut-off
US8231620B2 (en) 2009-02-10 2012-07-31 Tyco Healthcare Group Lp Extension cutting blade
US10492849B2 (en) 2013-03-15 2019-12-03 Cynosure, Llc Surgical instruments and systems with multimodes of treatments and electrosurgical operation
US11389226B2 (en) 2013-03-15 2022-07-19 Cynosure, Llc Surgical instruments and systems with multimodes of treatments and electrosurgical operation
US9872719B2 (en) 2013-07-24 2018-01-23 Covidien Lp Systems and methods for generating electrosurgical energy using a multistage power converter
US11135001B2 (en) 2013-07-24 2021-10-05 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
US10716587B2 (en) 2014-06-13 2020-07-21 Surgis Medical Llc Surgical device with light
US11819259B2 (en) 2018-02-07 2023-11-21 Cynosure, Inc. Methods and apparatus for controlled RF treatments and RF generator system
USD1005484S1 (en) 2019-07-19 2023-11-21 Cynosure, Llc Handheld medical instrument and docking base
US11564732B2 (en) 2019-12-05 2023-01-31 Covidien Lp Tensioning mechanism for bipolar pencil

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FR1172499A (fr) 1959-02-11
BE556940A (xx)
GB816720A (en) 1959-07-15
CH348483A (de) 1960-08-31
DE1040714B (de) 1958-10-09

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