Composite dielectric coating for electrosurgical implements
First Claim
1. An electrosurgical implement comprising an electrode with a metallic substrate provided with a dielectric coating having a dielectric strength of at least 1000 volts on a portion of said substrate, said dielectric coating being constituted by a porous ceramic layer at least about 0.001 inch thick, contiguous with said metallic substrate and a poly (p-xylylene) layer over said ceramic layer and substantially sealing the porous ceramic layer and penetrating into the pores thereof, said ceramic layer and said poly (p-xylylene) layer merging into one another along an irregular interface.
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Accused Products
Abstract
A dielectric coating for electrosurgical instruments including a ceramic coating applied to the instrument and a parylene coating applied to the ceramic coating. The coating may be used on monopolar and bipolar electrosurgical instruments to provide insulation having good dielectric properties.
168 Citations
11 Claims
- 1. An electrosurgical implement comprising an electrode with a metallic substrate provided with a dielectric coating having a dielectric strength of at least 1000 volts on a portion of said substrate, said dielectric coating being constituted by a porous ceramic layer at least about 0.001 inch thick, contiguous with said metallic substrate and a poly (p-xylylene) layer over said ceramic layer and substantially sealing the porous ceramic layer and penetrating into the pores thereof, said ceramic layer and said poly (p-xylylene) layer merging into one another along an irregular interface.
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10. An article of manufacture for electrosurgical instruments, the article comprising a plurality of electrosurgical implements unitary with a sheet-form frame that surrounds said implements, each implement comprising an electrode with a metallic substrate and a dielectric coating having a dielectric strength of at least 1000 volts on a portion of the substrate;
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the dielectric coating being constituted by a porous ceramic layer contiguous with the metallic substrate and a parylene layer over the ceramic layer; the ceramic layer and the parylene layer merging along an irregular interface and the parylene layer extending into the pores of the ceramic layer and substantially sealing the ceramic layer. - View Dependent Claims (11)
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Specification