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Porosity Evolution in Electrosurgical Blade Coatings

Published online by Cambridge University Press:  15 February 2011

Gregory Konesky
Gregory Konesky*
Affiliation:
Aaron Medical Industries, Inc. 7100 30th Ave N, St. Petersburg, FL 33710
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Abstract

During Electrosurgery, Radio Frequency (RF) electrical power is applied to a cutting surface which cauterizes the incision. The desiccation of surrounding tissue results in hemostasis and surgery without bleeding. In the case of localized heavy bleeding, a coagulation process is employed using modulated RF power. However, substantial amounts of desiccated tissue may stick to the blade, undoing the achieved hemostasis, and possibly worsening the situation. To prevent this, various electrosurgical blade coatings have been developed to both permit the flow of RF power through the coating, and prevent desiccated tissue from sticking to it.

PolyTetraFluoroEthylene (PTFE) is a commonly used electro- surgical blade coating that undergoes substantial surface morphology changes during use, eventually leading to failure. Highly conductive Diamond-Like Nanocomposite (DLN) electrosurgical coatings have been developed with the requisite non-stick characteristics and enhanced durability.

After a brief review of electrosurgical fundamentals, the underlying mechanisms of operation of these two coating materials are compared. In the case of PTFE, establishment and evolution of porosity in the coating is essential to the flow of RF power, yet ultimately leads to long term degradation. Alternate conduction mechanisms for DLN coatings are considered.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 550: Symposium GG/HH/II – Biomedical Materials-Drug Delivery, Implants and Tissue Engr , 1998 , 249
Copyright
Copyright © Materials Research Society 1999

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References

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