Catheter having common lead for electrode and sensor

A - Human Necessities – 61 – B

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A61B 18/14 (2006.01)

Patent

CA 2328064

An apparatus for delivering energy to a biological site includes a catheter having a plurality of electrodes arranged in a linear array, the electrodes positioned proximal the biological site. A power control system supplies power, each having a controllable duty cycle and phase angle, to each of the electrodes. A backplate is also positioned proximal the biological site so that the biological site is interposed between the electrode device and the backplate. The backplate is maintained at the reference voltage level in relation to the power. The power control system controls the phase angle of each power signal so that current flows between the electrodes and between the electrodes and the backplates results. Temperature sensors are located at the electrodes and each shares a common lead with the power circuitry. The temperature sensor signal is received by the power control system during the off-period of the duty cycle of the particular electrode.

Dispositif servant à appliquer de l'énergie à un site biologique et comprenant un cathéter comportant un groupement linéaire d'une pluralité d'électrodes placées en position proximale par rapport au site biologique. Un système de régulation de puissance alimente chacune des électrodes en courant possédant un cycle de travail et un angle de phase pouvant être commandés. Une plaque arrière est également placée à proximité du site biologique, de façon à intercaler ce dernier entre le groupement d'électrodes et la plaque arrière. Cette dernière est maintenue à un niveau de tension de référence par rapport au courant. Le système de régulation de puissance commande l'angle de phase de chaque signal de puissance, de sorte que le courant circule entre les électrodes et entre les électrodes et la plaque arrière. Des capteurs de température sont situés au niveau des électrodes et chacun partage un conducteur commun avec le circuit d'énergie. Le signal du capteur de température est reçu par le système de régulation de puissance pendant la période hors tension du cycle de travail de l'électrode concernée.

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