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Blood sugar level sensing and monitoring transducer

  • US 4,538,616 A
  • Filed: 07/25/1983
  • Issued: 09/03/1985
  • Est. Priority Date: 07/25/1983
  • Status: Expired due to Fees
First Claim
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1. A blood glucose sensor and monitor transducer comprising an enclosure implantable in the bloodstream of a person, an imperforate impermeable flexible diaphragm disposed in said enclosure and separating said enclosure into a first chamber open to the bloodstream and a second chamber, an osmostic semi-permeable membrane separating said second chamber from the bloodstream, a first electrical contact mounted on said diaphragm, a second electrical contact fixedly mounted in said first chamber and a third electrical contact fixedly mounted in said second chamber, and an osmostic solution filling said second chamber, whereby variations in glucose level of the blood in the bloodstream causing variations in osmostic pressure of the blood causes transfer of liquid fluid from and into said second chamber through said semi-permeable membrane deflecting said flexible diaphragm in one direction and in an opposite direction causing said first electrical contact on said flexible diaphragm to engage said second or third fixed electrical contact according to the direction of deflexion of said flexible diaphragm.

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