1
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 ...


2
Steven P Buysse, Bret S Felton, David N Heard, David Keppel, Ronald J Podhajsky, Dale F Schmaltz, Robert H Wham, Edward C Meagher, Kate R Lawes, David A Schechter, Chelsea Shields, Philip M Tetzlaff: Method and system for controlling output of RF medical generator. Sherwood Services, November 21, 2006: US07137980 (480 worldwide citation)

A closed-loop control system has a user interface for allowing a user to select at least one pre-surgical parameter. The system also has a sensor module for continually sensing at least one of electrical and physical properties proximate a surgical site and generating at least one signal and a contr ...


3
Robert H Wham, Thomas A Sturm: Automatic control system for an electrosurgical generator. Sherwood Services, November 27, 2007: US07300435 (375 worldwide citation)

An automatic control system for an electrosurgical generator is herein disclosed. The automatic control system includes voltage and current sensing circuits, a processing circuit, an output determining circuit, and a control circuit. Samples of the voltage and current outputs are supplied to the pro ...


4
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 ...


5
Robert H Wham, Chelsea Shields, Philip M Tetzlaff, Jeremy S James: Method and system for controlling output of RF medical generator. Covidien, March 8, 2011: US07901400 (216 worldwide citation)

A system and method are provided for controlling an electrosurgical generator generating electrosurgical energy which is delivered to a patient for performing an electrosurgical procedure for sealing tissue. The system includes a control module executable on a processor for receiving sensed data cor ...


6
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 ...


7
Steven P Buysse, Bret S Felton, David N Heard, David Keppel, Ronald J Podhajsky, Dale F Shmaltz, Robert H Wham, Edward C Meagher, Kate R Lawes, David A Schechter, Chelsea Shields, Philip M Tetzlaff, Jeremy S James: Method and system for controlling output of RF medical generator. Covidien, January 31, 2012: US08105323 (136 worldwide citation)

An electrosurgical generator is disclosed. The generator includes a microprocessor configured to generate a target impedance trajectory having at least one slope. The target impedance trajectory includes a plurality of target impedance values. The microprocessor is configured to drive tissue impedan ...


8
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 ...


9
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 ...


10
Robert H Wham, Thomas A Sturm, William D Faulkner: Method and system for programming and controlling an electrosurgical generator system. Covidien, October 30, 2012: US08298223 (70 worldwide citation)

A method and system are disclosed enabling configuration of a control system for an electrosurgical generator system for creating new surgical applications without changing the underlying software system. The programmable electrosurgical generator system has an RF output stage for outputting at leas ...