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Implantable tissue ischemia sensor

  • US 7,813,778 B2
  • Filed: 07/29/2005
  • Issued: 10/12/2010
  • Est. Priority Date: 07/29/2005
  • Status: Expired due to Fees
First Claim
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1. An implantable device comprising:

  • a light source for illuminating a target with light;

    a sensor configured so as to detect light backscattered substantially from local capillary and extravascular tissue within the target site onto said sensor and to provide a tissue oxygenation output signal that is a direct function of the presence or degree of internal tissue ischemia based at least on said light backscattered from said site;

    a power source configured to supply energy to said sensor, and said light source; and

    an exterior shell enclosing said power source, light source, and sensor configured so as to be biocompatible with respect to implantation internally wherein said external shell is a swallowable capsule for passage through the gastrointestinal system.

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