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Biomedical pressure transducer

  • US 4,869,265 A
  • Filed: 04/03/1987
  • Issued: 09/26/1989
  • Est. Priority Date: 04/03/1987
  • Status: Expired due to Term
First Claim
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1. Apparatus for estimating a pressure applied to a limb by a tourniquet cuff which encircles the limb, comprising:

  • a first flexible layer carrying a first electrical contact;

    a second flexible layer carrying a second electrical contact and cooperating with the first flexible layer to define a flexible pressurizable chamber wherein the first and second electrical contacts are touching when the chamber is not pressurized;

    locating means for attaching the chamber to a tourniquet cuff in a position that interposes the chamber between the cuff and limb encircled by the cuff and locates the contacts near a predetermined cuff location; and

    pressure estimation means for selectably pressurizing the chamber, and for indicating the lowest selected pressure at which the contacts are separated.

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