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Acoustic biosensor for monitoring physiological conditions in a body implantation site

  • US 6,475,170 B1
  • Filed: 03/10/2000
  • Issued: 11/05/2002
  • Est. Priority Date: 12/30/1997
  • Status: Expired due to Term
First Claim
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1. A method for monitoring a physiological condition at an aneurysmal sac using an acoustic biosensor, the biosensor comprising:

  • a sensing element for measuring a physiological condition at the aneurysmal sac and for generating an information signal representative of the physiological condition; and

    a transducer element for converting an acoustic interrogation signal into energy for operating the sensor and for modulating the interrogation signal to transmit the information signal, the method comprising;

    implanting the biosensor into the aneurysmal sac;

    providing an acoustic interrogation wave for impinging on the transducer element of the biosensor and thereby providing power to the sensing element, the acoustic wave having a reflected portion; and

    modulating the reflected portion of the interrogation wave based on the information signal.

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