Dc biopotential sensing electrode and electroconductive...

Details Dc biopotential sensing electrode and electroconductive... Dc biopotential sensing electrode and electroconductive...

A - Human Necessities

61

B

A61B 5/04 (2006.01) A61B 5/0408 (2006.01) A61B 5/05 (2006.01)

Patent

CA 2202749

A DC biopotential sensing electrode assembly (106) is provided for an apparatus (10) for sensing DC biopotentials present at the skin of a subject. The electrodes (106) include an electroconductive medium (158) for transmitting ions from the skin which has a chloride content within a range of from 6-15 grams chloride ion per hundred grams of such medium. To reduce the corrosive effect of this electroconductive medium, each electrode includes only one metallic component (122, 144), and to provide an electrode with a low AC impedance, this metal is uniformly coated upon nonmetallic sensor (120) and terminal (142) bodies with a coating thickness within a range of from 0.5 to 1.5 mil. To pressure a complete electrical path through both the sensor and the terminal bodies, the nonmetallic portions (120, 142) are formed of conductive plastic.

Ensemble electrodes (106) de détection du biopotentiel CC destiné à un appareil (10) de detection des biopotentiels CC présents dans la peau d'un patient. Les électrodes (106) contiennent un milieu électroconducteur (158) conduisant les électrons de la peau et présentant une teneur en chlorure de 6-15 grammes d'ions chlorure par 100 grammes dudit milieu. Pour réduire les effets corrosifs de ce milieu, chaque électrode ne comporte qu'un seul composant métallique (122, 144), et afin d'obtenir une électrode de faible impédance en CA, ledit métal forme un revêtement uniforme, d'une épaisseur comprise entre 0,5 et 1,5 mm, sur les corps non métalliques du capteur (120) et de la borne (142). Pour assurer un cheminement électrique continu à travers les corps du capteur et de la borne, les parties non métalliques (120, 142) sont en plastique conducteur.

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