Surgical instrument having self-regulating dielectric...

Details Surgical instrument having self-regulating dielectric... Surgical instrument having self-regulating dielectric...

A - Human Necessities

61

B

164/1, 128/113,

A61B 17/14 (2006.01) A61B 18/08 (2006.01) A61B 18/14 (2006.01)

Patent

CA 1085253

Abstract of the Disclosure The cutting edge of a scalpel blade is heated to an elevated preselected constant operating temperature for cutting tissue with simultaneous hemostasis by dielectric heating of the internal structure of the blade in the region along the cutting edge. Selective heating of regions of the cutting edge that are locally cooled by contact with tissues during surgical cutting is provided for by constructing the heating elements of the blade of ferroelectric materials that have a Curie point in the operating temperature range and that provide large increases in loss factor (the product of relative di- electric constant times the ratio of loss current to charging current) for temperature decrements below the Curie point.

246551

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