Implantable medical device with dual cell power source

Details Implantable medical device with dual cell power source Implantable medical device with dual cell power source

A - Human Necessities

61

N

A61N 1/378 (2006.01) A61N 1/08 (2006.01)

Patent

CA 2448593

An implantable medical device having a dual cell power source powering a high- power output circuit and a low-power control circuit. The power source includes a first, high-rate cell and a second, lower-rate cell having a rate capability less than a rate capability of the first, high-rate cell. The first and second cells are electrically connected to the output circuit and control circuit by circuitry. In one embodiment, the circuitry connects the first and second cells in parallel to the output circuit and the control circuit, and includes a switching circuit for selectively uncoupling the first, high-rate cell from the control circuit during a transient high power pulse. In another embodiment, the first and second cells are formed within a single case and are connected in parallel to the output circuit and the control circuit. In another embodiment, the high-rate cell is anode limited, characterized by a rate capability exhibiting minimal dependence on time up to a pre-selected voltage-based ERI at which at least 40 percent of the cathode is consumed.

L'invention concerne des structures et des procédés, en rapport avec les électrodes destinées à être introduites dans une traversée selon un profil adapté à la détection sous-cutanée des signaux physiologiques et cardiaques. On décrit des ensembles électrodes pouvant être introduits dans une traversée de manière à offrir un espacement maximum des électrodes, tout en garantissant un bruit électrique de myopotentiel minimum, avec une isolation fiable par rapport à l'enceinte du dispositif implantable. On présente un certain nombre de structures et de procédés de fabrication permettant d'assurer à la fois une surface de détection importante et un profil réduit. L'ensemble électrode de détection sous-cutanée considéré aux fins de l'invention offre un système de détection dépourvu de conducteur et apporte une amélioration supplémentaire dans les procédures d'installation et de suivi.

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