Systems and methods for electrode contact assessment

A - Human Necessities – 61 – B

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A61B 18/18 (2006.01)

Patent

CA 2626833

Systems and methods are disclosed for assessing electrode-tissue contact for tissue ablation. An exemplary electrode contact sensing system comprises an electrode 10 housed within a distal portion of a catheter shaft 14. At least one electro-mechanical sensor 20 is operatively associated with the electrode 10 within the catheter shaft 14. The at least one electro-mechanical sensor 20 is responsive to movement of the electrode 10 by generating electrical signals corresponding to the amount of movement. The system may also include an output device electrically connected to the at least one electro-mechanical sensor 20. The output device receives the electrical signals for assessing a level of contact between the electrode 10 and a tissue 12.

L'invention porte sur des systèmes et des procédés qui permettent d'évaluer le contact entre une électrode et des tissus en vue d'une ablation de tissus. Un système de détection de contact d'électrode exemplaire comprend une électrode (10) logée dans la partie distale d'une tige de cathéter (14). Au moins un capteur électromécanique (20) est fonctionnellement associé à l'électrode (10) située à l'intérieur de la tige de cathéter (14). Le capteur électromécanique précité (20) est sensible au mouvement de l'électrode (10) et produit des signaux électriques correspondant à la quantité de mouvement. Le système peut également comprendre un dispositif de sortie électriquement relié au capteur électromécanique précité (20). Le dispositif de sortie reçoit les signaux électriques permettant d'évaluer le niveau de contact entre l'électrode (10) et les tissus (20).

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