05451224 is referenced by 450 patents and cites 15 patents.

Surgical apparatus for bipolar diathermy has a radio frequency generator connectible to a cutting assembly which includes a support structure having a pair of electrical supply conductors and, mounted at the distal end of the support assembly, a tissue cutting head. The cutting head comprises a loop of material which is electrically conducting and has a negative temperature coefficient (NTC) of resistance, such as silicon carbide. In operation, radio frequency power from the generator causes heating of the loop to a temperature at which its resistivity rises to level which exceeds that of living tissue with the result that diathermy currents pass through the tissue. Also disclosed is a pair of forceps with electrodes made of NTC material, for cauterization.

Title
Apparatus for radio frequency bipolar electrosurgery
Application Number
8/23191
Publication Number
5451224
Application Date
February 25, 1993
Publication Date
September 19, 1995
Inventor
Colin C O Goble
Cardiff
GB
Nigel M Goble
Nr. Cardiff
GB
Agent
Fish & Richardson
Assignee
G2 Design
GB
IPC
A61B 17/39
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