Surgery – Truss – Pad
Patent
1988-08-08
1989-07-25
Hindenburg, Max
Surgery
Truss
Pad
12830317, A61B 1736
Patent
active
048503533
ABSTRACT:
An electrosurgical blade having a silicon nitride ceramic substrate having a beveled working edge with first and second conductive metal traces adhered to opposed side surfaces of the substrate along the working edge so as to be closely spaced relative to one another across the thickness dimension of the beveled working edge. Further conductive traces are formed on opposed sides of the substrate along the other edge of the substrate. In use, when a high RF voltage is applied between the traces extending along the working edge and the surgical blade is brought into contact with tissue, the relatively high current density causes relatively high heating to take place, bursting the cells and creating an incision. When a high RF voltage is applied between the traces separated by the width dimension of the substrate, the current density therebetween is significantly lower but sufficient to create enough heat to dehydrate tissue and blood cells whereby coagulation is achieved. The use of silicon nitride as the substrate material enhances the performance of the blade by inhibiting thermal runaway.
REFERENCES:
patent: 4074718 (1978-02-01), Morrison
patent: 4161950 (1979-07-01), Doss et al.
patent: 4202337 (1980-05-01), Hren et al.
patent: 4232676 (1980-11-01), Herczog
patent: 4248231 (1981-02-01), Herczog et al.
patent: 4314559 (1982-02-01), Allen
patent: 4802476 (1989-02-01), Noerenberg et al.
Grabinger Scott R.
Solberg Jeffrey J.
Stasz Peter
Everest Medical Corporation
Haugen Orrin M.
Hindenburg Max
Niebuhr Frederick W.
Nikolai Thomas J.
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