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Measurement arrangement for acquiring a signal corresponding to respiratory motion

  • US 5,088,501 A
  • Filed: 10/17/1990
  • Issued: 02/18/1992
  • Est. Priority Date: 10/20/1989
  • Status: Expired due to Fees
First Claim
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1. A measuring arrangement for acquiring a signal corresponding to respiratory motion comprising:

  • a pneumatic respiratory belt adapted to be worn by an examination subject which generates a pneumatic pressure signal in response to respiratory motion;

    a light source;

    a pressure transducer in fluid communication with said belt via a releasable connection, permitting said belt to assume an arbitrary operating point before connection to said pressure transducer, for receiving said pneumatic pressure signal therefrom and in optical communication with said light source for receiving light therefrom, said pressure transducer having a flexible membrane deformable by said pneumatic pressure signal, said membrane carrying a reflector thereon disposed in the path of light from said light source and which generates an intensity-modulated optical signal corresponding to the deformations; and

    means for detecting said intensity-modulated optical signal.

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