Remotely interrogated diagnostic implant device with...

A - Human Necessities – 61 – B

Patent

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A61B 5/02 (2006.01) A61B 5/0215 (2006.01) A61B 5/04 (2006.01) A61B 5/0402 (2006.01) A61B 5/07 (2006.01) A61B 8/06 (2006.01) A61M 29/00 (2006.01) A61B 5/00 (2006.01) A61F 2/02 (2006.01) A61F 2/06 (2006.01) A61N 1/372 (2006.01)

Patent

CA 2364869

An implant device (32) is provided which is responsive to an external interrogation circuit (38). The implant device (32) includes a structure implantable within a living animal (34) and operatively configured to carry out or assist in carrying out a function within the living animal. The device (32) further includes an electrically passive sensing circuit (not shown) integral with the structure for sensing a parameter associated with the function. In particular, the sensing circuit includes (not shown) an inductive element, wherein the sensing circuit has a frequency dependent variable impedance loading effect on the interrogation circuit (38) in response to an interrogation signal provided by the exciter/interrogator element (36), the impedance loading effect varying in relation to the sensed parameter.

L'invention concerne un dispositif d'implant (32) réceptif à un circuit d'interrogation externe (38). Le dispositif d'implant (32) comprend une structure implantable dans un animal vivant (34) et conçue de manière fonctionnelle pour réaliser ou aider à la réalisation d'une fonction à l'intérieur de cet animal. Ce dispositif (32) comprend, en outre, un circuit passif de détection électrique (non représenté) solidaire à la structure destiné à détecter un paramètre associé à la fonction. Notamment, le circuit de détection (non représenté) comprend un élément inducteur (non représenté), et a sur le circuit d'interrogation (38) un effet de chargement d'impédance variable dépendant de la fréquence, en réponse à un signal d'interrogation produit par l'élément excitant/interrogateur (36), l'effet de chargement d'impédance variant en fonction du paramètre détecté.

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