1
David W Newton, William G Paterson: Adaptive, return electrode monitoring system. Valleylab, Gerald J Ferguson Jr, Joseph J Baker, November 22, 1983: US04416276 (557 worldwide citation)

A return electrode monitoring system for use with a split patient return electrode having two, electrically isolated electrode elements adapted for contacting a patient, the system comprising means responsive to the impedance between the two electrode elements for producing a signal which is a funct ...


2
David W Newton, John M Adan: Leakage current cancelling circuit for use with electrosurgical instrument. March 30, 1976: US03946738 (224 worldwide citation)

Circuitry for cancelling leakage current is disclosed. The leakage cancelling circuit is utilized in conjunction wih the active or patient electrodes of an electrosurgical instrument used in electrosurgery. In electrosurgery, a radio frequency current is passed through a patient between an active el ...


3
David W Newton, Frederic M Hulett III, Christopher Ovens: Return electrode monitoring system for use during electrosurgical activation. Valleylab, Gerald J Ferguson Jr, Joseph J Baker, November 22, 1983: US04416277 (188 worldwide citation)

A return electrode monitoring system for use with a patient return electrode adapted for contacting a patient, the return electrode having two, spaced apart conductors attached thereto for connecting the electrode to a generator of electrosurgical current which passes through the electrode, the syst ...


4
David W Newton, Frank A Alford: Electrosurgical safety circuit and method of using same. Valleylab, Gerald J Ferguson Jr, Joseph J Baker, June 13, 1978: US04094320 (183 worldwide citation)

An improved electrosurgical safety circuit where the currents in the active and patient leads are monitored, the monitored currents being respectively rectified and then subtracted from one another. Whenever the active current exceeds the patient or return current by an amount corresponding to a dyn ...


5
David W Newton: Apparatus for changing the output power level of an electrosurgical generator while remaining in the sterile field of a surgical procedure. Valleylab, Gerald J Ferguson Jr, May 9, 1989: US04827927 (181 worldwide citation)

An electrosurgical generating system and method including an electrosurgical generator; and a handpiece including an active electrode connected to the electrosurgical generator for applying electrosurgical current from the generator to a patient, the handpiece having switches disposed thereat for ch ...


6
David W Newton: Safety monitoring circuit for electrosurgical unit. Valleylab, Gerald J Ferguson Jr, Joseph J Baker, November 4, 1980: US04231372 (171 worldwide citation)

A safety monitoring circuit for use in an electrosurgical unit is disclosed. The circuit is useful to indicate a fault in the return path between an RF source and a patient electrode in contact with a patient to prevent electrical burns to the patient that can occur due to improper patient contact w ...


7
David W Newton: Signal generating device and method for producing coagulation electrosurgical current. Valleylab, Gerald J Ferguson Jr, Joseph J Baker, June 15, 1976: US03963030 (160 worldwide citation)

A signal generating device and method for producing an RF output signal regulated in power and of decaying amplitude suitable for use in an electrosurgical generator for surgical coagulation purposes. The device includes a circuit tuned to a predetermined radio frequency suitable to prevent nerve st ...


8
Mehdy Sabbaghian, Tony Barfield, Patrick Schiele, David W Newton, Gregory J Lormand, Glen J Schwartzberg: Insertion instrument for vena cava filter. Louisiana State University and Agricultural and Mechanical College, William David Kiesel, Robert C Tucker, September 15, 1992: US05147379 (160 worldwide citation)

An improved insertion instrument for a vena cava filter is provided and iudes a filter retainer attached to the catheter for preventing accidental ejection of the filter and for enabling retraction of the filter into the carrier body at any time prior to complete ejection; a directional control mech ...


9
David W Newton, Roger C Odell, Don R Boyle, James Richard Gannoe, John J Laviolette: Electrosurgical apparatus for laparoscopic and like procedures. Electroscope, Gerald J Ferguson Jr, Sixbey Friedman Leedom & Ferguson P C, November 18, 1997: US05688269 (156 worldwide citation)

A safety shield for use in laparoscopic or like electrosurgical procedures where the shield surrounds the active electrode and extends from a trocar or the like to the field of view of the surgical procedure. The shield is connected to the return lead via a low impedance path which includes monitor ...


10
Roger C Odell, Paul H Emerling, David W Newton, Robert C Steinway, Don R Boyle: Electrosurgical apparatus for laparoscopic and like procedures. Electroscope, December 17, 2002: US06494877 (105 worldwide citation)

An electrosurgical instrument having a safety shield for use in laparoscopic or like electrosurgical procedures designed to receive a plurality of electrosurgical instrument inserts. The electrosurgical inserts are designed so as to provide quick and easy attachment to the electrosurgical apparatus ...