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Uterine contraction detection

  • US 5,205,296 A
  • Filed: 05/19/1992
  • Issued: 04/27/1993
  • Est. Priority Date: 10/30/1990
  • Status: Expired due to Fees
First Claim
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1. A system for detecting contractions in and adapted for coupling to a human body, said body having a variable mechanical impedance which changes with contractions, said system comprising:

  • a transducer including a relatively rigid interface having a first side for contacting the body and a second side disposed away from the body;

    vibrating means being arranged for converting drive signals into vibrations and being connected to said second side of the transducer so that vibrations can be mechanically coupled by said relatively rigid interface into said body, said vibrations having a frequency which varies with the mechanical impedance of said body;

    a drive circuit coupled to said vibrating means for providing a drive signal thereto; and

    monitor means coupled to said drive circuit and said vibration means for detecting contractions.

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