1
Jeffrey L Eggleston, James H Orszulak, Matthew J Sodnicar: Control system for neurosurgery. Valleylab, Peter C Richardson, Lawrence C Akers, Aaron Passman, February 24, 1998: US05720744 (604 worldwide citation)

A control system and method for the operation of neurosurgical bipolar electrodes for application to the tissue and bodily fluids of a patient provides a source of high frequency energy connected to bipolar electrodes. Contacting surfaces are on the bipolar electrodes of highly electrically conducti ...


2
Steven P Buysse, James H Orszulak, Robert H Wham: Vessel sealing system. Sherwood Services, June 4, 2002: US06398779 (537 worldwide citation)

A method for electrosurgically sealing a tissue includes steps of: (A) applying an initial pulse of RF energy to the tissue, the pulse having characteristics selected so as not to appreciably heat the tissue; (B) measuring a value of an impedance of the tissue in response to the applied pulse; (C) i ...


3
Robert Wham, Steven P Buysse, James H Orszulak: Vessel sealing system. Sherwood SErvices, September 28, 2004: US06796981 (458 worldwide citation)

A method for electrosurgically sealing a tissue includes steps of: (A) applying a first pulse of RF energy to the tissue; and (B) applying at least one subsequent RF energy pulse to the tissue and varying RF energy parameters of individual pulses of subsequent RF energy pulses in accordance with at ...


4
Robert Wham, Steven P Buysse, James H Orszulak: Vessel sealing system. Sherwood Services, December 4, 2007: US07303557 (355 worldwide citation)

A method for electrosurgically sealing a tissue includes steps of: (A) applying a first pulse of RF energy to the tissue; and (B) applying at least one subsequent RF energy pulse to the tissue and keeping constant or varying RF energy parameters of individual pulses in accordance with at least one c ...


5
James H Orszulak, James W McPherson: Switched resonant ultrasonic power amplifier system. Sherwood Services, July 8, 2008: US07396336 (227 worldwide citation)

A switched resonant power amplifier system for ultrasonic transducers is disclosed. The system includes an amplifier that receives and processes a driver output signal for generating a drive signal that is provided to an ultrasonic device for controlling output of the ultrasonic device. An output co ...


6
Robert H Wham, Steven P Buysse, James H Orszulak: Vessel sealing system. Sherwood Services, April 29, 2008: US07364577 (221 worldwide citation)

A method for electrosurgically sealing a tissue includes steps of: (A) applying a first pulse of RF energy to the tissue; and (B) applying at least one subsequent RF energy pulse to the tissue and keeping constant or varying RF energy parameters of individual pulses of subsequent RF energy pulses in ...


7
James H Orszulak, Robert H Wham: System and method for closed loop monitoring of monopolar electrosurgical apparatus. Covidien, April 19, 2011: US07927328 (213 worldwide citation)

An electrosurgical system is disclosed comprising a generator configured to electrosurgical coagulation waveforms. The generator includes a closed loop control system for controlling the electrosurgical coagulation waveforms. The closed loop control system includes a sensor configured to sense a tis ...


8
James H Orszulak, James W McPherson: Electrosurgical system employing multiple electrodes and method thereof. Sherwood Services, October 16, 2007: US07282049 (152 worldwide citation)

A system for heat ablation of tissue in a patient comprises a plurality of electrodes operatively connected to a source of radiofrequency energy and configured to apply RF energy to tissue at a patient site, a plurality of RF current restricting circuits, each circuit coupled between one of the plur ...


9
Robert H Wham, Steven P Buysse, James H Orszulak: Vessel sealing system. Covidien, October 16, 2012: US08287528 (116 worldwide citation)

A method for electrosurgically sealing a tissue includes steps of: (A) applying a first pulse of RF energy to the tissue; and (B) applying at least one subsequent RF energy pulse to the tissue and keeping constant or varying RF energy parameters of individual pulses of subsequent RF energy pulses in ...


10
Robert H Wham, Steven P Buysse, James H Orszulak: Vessel sealing system. Covidien, November 26, 2013: US08591506 (101 worldwide citation)

An electrosurgical system is disclosed. The electrosurgical system includes an electrosurgical generator adapted to supply electrosurgical energy to tissue. The electrosurgical generator includes impedance sensing circuitry which measures impedance of tissue, a microprocessor configured to determine ...