Electrosurgery : Part I. Basics and principles - 14/03/14
Abstract |
The term electrosurgery (also called radiofrequency surgery) refers to the passage of high-frequency alternating electrical current through the tissue in order to achieve a specific surgical effect. Although the mechanism behind electrosurgery is not completely understood, heat production and thermal tissue damage is responsible for at least the majority—if not all—of the tissue effects in electrosurgery. Adjacent to the active electrode, tissue resistance to the passage of current converts electrical energy to heat. The only variable that determines the final tissue effects of a current is the depth and the rate at which heat is produced. Electrocoagulation occurs when tissue is heated below the boiling point and undergoes thermal denaturation. An additional slow increase in temperature leads to vaporization of the water content in the coagulated tissue and tissue drying, a process called desiccation. A sudden increase in tissue temperature above the boiling point causes rapid explosive vaporization of the water content in the tissue adjacent to the electrode, which leads to tissue fragmentation and cutting.
Le texte complet de cet article est disponible en PDF.Key words : coagulation, current, electricity, electrocoagulation, electrodesiccation, electrofulguration, electrosurgery, high frequency, radiofrequency
Plan
The Center for Dermatology Research is supported by an unrestricted educational grant from Galderma Laboratories, L.P. |
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Dr Feldman is a consultant and speaker, has received grants, or has stock options in Abbott Labs, Amgen, Anacor Pharmaceuticals, Inc, Astellas, Caremark, Causa Research, Celgene, Centocor Ortho Biotech Inc, Coria Laboratories, Dermatology Foundation, Doak, Galderma, Gerson Lehrman Group, Hanall Pharmaceutical Co Ltd, Informa Healthcare, Kikaku, Leo Pharma Inc, Medical Quality Enhancement Corporation, Medicis Pharmaceutical Corporation, Medscape, Merck & Co, Inc, Merz Pharmaceuticals, Novan, Novartis Pharmaceuticals Corporation, Peplin Inc, Pfizer Inc, Pharmaderm, Photomedex, Reader's Digest, Sanofi-Aventis, SkinMedica, Inc, Stiefel/GSK, Suncare Research, Taro, US Department of Justice, and Xlibris. Drs Taheri, Mansoori, Sandoval, Williford, and Pearce have no conflicts of interest to declare. |
Vol 70 - N° 4
P. 591.e1-591.e14 - avril 2014 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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