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Acoustic physiological sensor

  • US 7,479,112 B2
  • Filed: 08/26/2003
  • Issued: 01/20/2009
  • Est. Priority Date: 08/26/2003
  • Status: Expired due to Fees
First Claim
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1. An apparatus comprising:

  • an implantable transducer; and

    a physiological sensor that includes at least one biocompatible body, the body sized and shaped to be implanted into and within a myocardial wall of a subject, at least a portion of the body including a material having at least one physical property that changes in response to a physiological condition of the subject, wherein the change in the at least one physical property is responsive to at least one of a change in pH or a change in an ion concentration, wherein the portion of the body is sized and shaped such that the change in the physical property is chronically detectable using acoustic energy supplied by the implantable transducer to provide an indication of the physiological condition.

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