Patent ID: 8142425

Claim:
A blade for a hemostatic surgical instrument comprising: (A) a heat treated blade comprising a stem portion fixed in supporting relationship with a laminar cutting portion, said blade stem portion for support from the handle of a hemostatic surgical instrument, said laminar cutting portion having a core of martensitic steel with oppositely disposed core sides extending to a tip and cutting edge region, a layer of substantially pure metallic material exhibiting high thermal conductivity bonded in thermal exchange relationship with each core side and extending to spaced adjacency with said tip and cutting edge region, and a buttressing layer of effective mechanical strength material bonded to the outwardly disposed surface of each layer of metallic material; and a said blade stem portion formed of a metallic material exhibiting low thermal conductivity; and (B) a blade heating circuit having leads extending from a blade terminal assembly at said blade stem portion to one or more resistor heater components in thermal exchange relationship with a said layer of metallic material exhibiting high thermal conductivity.