IP Library › Granted Patent US 7,846,156
Granted Patent B2
US 7,846,156 · App. 11/278,690 · Granted Dec 7, 2010

Electrosurgical generator apparatus

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Quick Facts
Patent No.
US 7,846,156
App. No.
11/278,690
Granted
Dec 7, 2010
Kind
B2
Abstract

An electrosurgical generator apparatus controls a variable output signal to electrodes. The generator apparatus operates in a cut mode, a coagulation mode or a stimulate mode. The generator apparatus comprises a DC power supply that provides regulated low voltage and high voltage outputs and a radio frequency (RF) waveform generator circuit that provides pulse duration modulation (PDM) of a carrier signal. The carrier signal directly affects the variable output signal to the electrodes. A control circuit controls a variable output signal to electrodes used in electrosurgical procedures. The control circuit comprises a DC power supply circuit that provides regulated low voltage and high voltage outputs and an RF waveform generator circuit that provides pulse duration modulation of a carrier signal. The carrier signal directly affects the variable output signal to the electrodes.

Claims (8)

1. An electrosurgical generator apparatus that controls a variable output signal to electrodes, the generator apparatus comprising:

(a) a DC power supply that provides regulated low voltage and high voltage outputs;

(b) a radio frequency (RF) waveform generator circuit that provides modulation of a carrier signal, the carrier signal directly affecting the variable output signal to the electrodes;

(c) an impedance monitoring circuit that detects an impedance as measured across a pair of leads of the electrodes, the impedance monitoring circuit including a bridge detector for measuring an overall signal and a reference detector for measuring a reference signal, the impedance being a complex value.

2. The electrosurgical generator apparatus according to claim 1 , wherein the bridge detector further comprises a bridge in-phase detector for measuring overall in-phase components of the overall signal and a bridge quadrature detector for measuring overall quadrature components of the overall signal.

3. The electrosurgical generator apparatus according to claim 1 , wherein the reference detector further comprises a reference in-phase detector for measuring reference in-phase components of the reference signal and a reference quadrature detector for measuring reference quadrature components of the reference signal.

4. The electrosurgical generator apparatus according to claim 1 , wherein the impedance is correspondingly proportional to an amount of cell destruction caused by the generator apparatus.

5. The electrosurgical generator apparatus according to claim 1 , wherein the complex impedance value includes magnitude and phase angle.

Assignments (8)
RELEASE OF SECURITY INTEREST Recorded Apr 8, 2025
From: BARCLAYS BANK PLC, AS COLLATERAL AGENT
To: SOLTA MEDICAL, INC.; PRECISION DERMATOLOGY, INC.; BAUSCH HEALTH IRELAND LIMITED (F/K/A/ VALEANT PHARMACEUTICALS IRELAND LIMITED); SALIX PHARMACEUTICALS, INC.; SALIX PHARMACEUTICALS, LTD; SANTARUS, INC.; MEDICIS PHARMACEUTICAL CORPORATION; HUMAX PHARMACEUTICAL S.A.; SOLTA MEDICAL IRELAND LIMITED; BAUSCH & LOMB MEXICO, S.A. DE C.V.; BAUSCH+LOMB OPS B.V.; BAUSCH HEALTH AMERICAS, INC.; BAUSCH HEALTH COMPANIES INC.; BAUSCH HEALTH HOLDCO LIMITED; BAUSCH HEALTH MAGYARORSZAG KFT (A/K/A BAUSCH HEALTH HUNGARY LLC); BAUSCH HEALTH POLAND SPOLKA Z OGRANICZONA ODPOWIEDZIALNOSCIA (F/K/A VALEANT PHARMA POLAND SPOLKA Z OGRANICZONA ODPOWIEDZIALNOSCIA); BAUSCH HEALTH US, LLC; BAUSCH HEALTH, CANADA INC. / SANTE BAUSCH, CANADA INC.; ICN POLFA RZESZOW SPOLKA AKCYJNA (A/K/A ICN POLFA RZESZOW S.A.); ORAPHARMA, INC.; PRZEDSIEBIORSTWO FARMACEUTYCZNE JELFA SPOLKA AKCYJNA (A/K/A PRZEDSIEBIORSTWO FARMACEUTYCZNE JELFA S.A.); SOLTA MEDICAL DUTCH HOLDINGS B.V.; V-BAC HOLDING CORP.; VRX HOLDCO LLC; 1261229 B.C. LTD.; 1530065 B.C. LTD.
Reel/Frame 070778/0199 →
CORRECTIVE ASSIGNMENT TO CORRECT THE TYPOGRAPHICAL ERROR IN ASSIGNOR'S NAME PREVIOUSLY RECORDED ON REEL 038393 FRAME 0477. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT FROM ASSIGNORS TO STRYKER CORPORATION. Recorded May 9, 2016
From: SYNERGETICS USA, INC.; SYNERGETICS IP, INC.; SYNERGETICS, INC.
To: STRYKER CORPORATION
Reel/Frame 038642/0561 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 27, 2016
From: SYNERGETICS USA, INC.; SYNERGETICS IP, INC.; SYNERGETICS INC.
To: STRYKER CORPORATION
Reel/Frame 038393/0477 →
RELEASE OF SECURITY INTEREST Recorded Apr 1, 2016
From: BARCLAYS BANK PLC
To: SYNERGETICS USA, INC.
Reel/Frame 038167/0091 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 25, 2016
From: MALIS, JERRY; MALIS, LEONARD I.; ACORCEY, ROBERT R.; SOLT, DAVID L.; GROCH, ANTHONY J.
To: VALLEY FORGE SCIENTIFIC CORPORATION
Reel/Frame 037569/0516 →
SECURITY AGREEMENT Recorded Dec 21, 2015
From: SPROUT PHARMACEUTICALS, INC., AS GRANTOR; UNILENS VISION INC., AS GRANTOR; COMMONWEALTH LABORATORIES, LLC, AS GRANTOR; SYNERGETICS USA, INC., AS GRANTOR
To: BARCLAYS BANK PLC, AS COLLATERAL AGENT
Reel/Frame 037357/0490 →
RELEASE OF SECURITY INTEREST Recorded Oct 14, 2015
From: REGIONS BANKS
To: SYNERGETICS USA, INC
Reel/Frame 036794/0001 →
SECURITY INTEREST Recorded Dec 17, 2014
From: SYNERGETICS USA, INC.
To: REGIONS BANK
Reel/Frame 034529/0444 →