1
Michael S Klicek: Impedance and temperature generator control. Valleylab, Peter C Richardson, Lawrence C Akers, Aaron Passman, March 5, 1996: US05496312 (1084 worldwide citation)

A control responds to impedance and temperature between active and return electrodes of the electrosurgical generator during tissue desiccation. Tissue contacts separately and independently provide high frequency power to effect tissue electrosurgically. An instantaneous impedance monitor between ea ...


2
Qi Bin Bao, Paul A Higham: Hydrogel intervertebral disc nucleus. Pfizer Hospital Products Group, Peter C Richardson, Lawrence C Akers, Raymond W Augustin, September 10, 1991: US05047055 (710 worldwide citation)

A prosthetic nucleus for a vertebral disc is made of a hydrogel material. The hydrogel prosthetic nucleus has a shape generally conforming to the natural nucleus pulposus. The hydrogel has a water content of at least 30% and has a compressive strength of 4MNm.sup.-2 or greater. When the hydrogel mat ...


3
John H Burton, Bradford G Staehle: Stent placement instrument and method. American Medical Systems, Peter C Richardson, Lawrence C Akers, Mark Dryer, June 25, 1991: US05026377 (706 worldwide citation)

An instrument for the deployment or retraction of a self-expanding stent in a body canal, which comprises an elongated tubular outer sleeve having disposed therein an elongated core which is movable relative to said sleeve and has a grip member formed at or near its distal end, which grip member is ...


4
Nigel Mark Goble, Colin Charles Owen Goble: Electrosurgical apparatus. Gyrus Medical, Peter C Richardson, Lawrence C Akers, Aaron Passman, July 15, 1997: US05647869 (693 worldwide citation)

In electrosurgical apparatus for tissue desiccation and cutting, an electrosurgical generator has a series-connected output inductor which forms a series resonant circuit with the capacitance of the generator load, the load including an electrode unit and a cable coupled to the generator output. The ...


5
Louis Delahuerga, Robert B Stoddard, Michael S Klicek: Enhanced electrosurgical apparatus. Valleylab, Peter C Richardson, Lawrence C Akers, Mark Dryer, June 8, 1993: US05217457 (685 worldwide citation)

A device for enhancing the safety and efficiency of a hand-operated electrosurgical pencil having an exposed electrode with a distal end defining a tip for cutting biological tissue, which device comprises a nose piece adapted to be mounted about said electrode and defining at least one pathway for ...


6
David A Zieve, Michael S Klicek: Electrosurgical and ultrasonic surgical system. Valleylab, Peter C Richardson, Lawrence C Akers, Mark Dryer, March 2, 1993: US05190517 (625 worldwide citation)

An electrical circuit system which provides electrical energy to a surgical apparatus having ultrasonic fragmentation, aspiration and electrosurgical coagulation capabilities, which system also includes an impedance sensing network and automatic feedback power output control to reduce RF power outpu ...


7
Qi Bin Bao, Paul A Higham: Hydrogel bead intervertebral disc nucleus. Pfizer Hospital Products Group, Peter C Richardson, Lawrence C Akers, Raymond W Augustin, March 9, 1993: US05192326 (621 worldwide citation)

A prosthetic nucleus for implantation in the disc space after removal of a damaged or degenerated nucleus is formed from a multiplicity of hydrogel beads having a water content of at least 30%. The beads are covered by a semi-permeable membrane. The membrane has porosity less than the size of the be ...


8
Michael S Klicek: Electrosurgical bipolar treating apparatus. Valleylab, Peter C Richardson, Lawrence C Akers, Mark Dryer, January 25, 1994: US05281216 (599 worldwide citation)

An electrosurgical bipolar treating apparatus comprising a handpiece to which is connected a first active electrode and a second return electrode having exposed distal ends which define a bipolar tip for electrosurgically treating tissue at an operational site on a patient, which tip is structured s ...


9
Tassilo Bonzel: Dilatation catheter. Charles J Knuth, Peter C Richardson, Lawrence C Akers, August 9, 1988: US04762129 (590 worldwide citation)

A dilatation catheter, in particular for expanding constrictions in coronary vessels, includes a balloon (2) capable of being enlarged by injecting a fluid through a tube (3). The tube (3) is arranged laterally offset from a segment of flexible tubing (7) by which a passage (8) for a guide wire (1) ...


10
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 (573 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 ...



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