Self-limiting electrosurgical return electrode with pressure...

A - Human Necessities – 61 – B

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A61B 18/16 (2006.01)

Patent

CA 2753431

A self-limiting electrosurgical electrode for use with electrosurgery and various other surgical pro-cedures is disclosed. The electrode includes a heating ele-ment for generating heat to warm a patient resting upon the electrode. The electrode can also include one or more pads to prevent the creation of pressure sores or decubitus ulcers on a patient resting upon the electrode. The elec-trode has an effective bulk impedance equal to or greater than about 4,000 .OMEGA..cm, which arises from resistive com-ponents, capacitive components, inductive components, or combinations thereof. Through the selection of the impedance characteristics for the electrode materials, and through tailoring of electrode geometries, the electrode of the present invention is self-regulating and self- limiting as to current density and temperature rise so as to prevent patient trauma.

L'invention porte sur une électrode électrochirurgicale auto-limitante pour utilisation en électrochirurgie et dans diverses autres procédures chirurgicales. L'électrode comprend un élément chauffant destiné à générer de la chaleur pour chauffer un patient couché sur l'électrode. L'électrode peut également comprendre un ou plusieurs tampons pour empêcher la création d'escarres de décubitus ou d'ulcères de décubitus sur un patient couché sur l'électrode. L'électrode a une impédance volumique effective égale ou supérieure à environ 4 000 O/cm, qui est issue de composants résistifs, de composants capacitifs, de composants inductifs ou de combinaisons de ceux-ci. Par sélection des caractéristiques d'impédance des matériaux d'électrode, et par personnalisation des géométries d'électrode, l'électrode selon la présente invention est auto-régulante et auto-limitante vis-à-vis de la densité de courant et de l'augmentation de température de façon à éviter un trauma de patient.

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