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Medical telemetery system, and a sensor device and a receiver for the same

  • US 6,267,723 B1
  • Filed: 03/02/1999
  • Issued: 07/31/2001
  • Est. Priority Date: 03/02/1998
  • Status: Expired due to Term
First Claim
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1. A medical telemetry system comprising:

  • a sensor device comprising;

    a sensor unit detecting a biomedical signal;

    first detecting means for detecting a state of said sensor unit in which said sensor unit cannot detect the biomedical signal, and for outputting an undetectable state signal indicative of the state; and

    transmitting means for transmitting the undetectable state signal and the biomedical signal in the form of a radio signal;

    a receiver adapted to be interchangeable connected to a plurality of various monitoring devices, said receiver comprising;

    receiving means for receiving the radio signal transmitted from said sensor device;

    second detecting means for detecting the undetectable state signal, and for outputting an alarm signal when the undetectable state signal is detected; and

    connecting means for supplying the biomedical signal of the received radio signal and the alarm signal to a signal input portion of one of said plurality of various monitoring devices;

    wherein said second detecting means comprises a variable impedance switching device for varying an impedance to an output of said connecting means when the undetectable state signal is detected.

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