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Catheter-type electrochemical sensors

  • US 4,834,101 A
  • Filed: 06/26/1987
  • Issued: 05/30/1989
  • Est. Priority Date: 06/26/1987
  • Status: Expired due to Fees
First Claim
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1. An arrangement for monitoring concentration of an analyte selected from the group consisting of CO2, NH3, SO2, NO2, H2 S, and HCN, the arrangement comprising:

  • elongated body means having dual lumens separated from one another by an integrally formed interlumen wall, said elongated body means being formed of a gas-permeable polymeric material impregnated with a pH sensitive material over at least a portion thereof for forming a pH responsive membrane, said elongated body means having a first one of said dual lumens therein accommodating an electrolyte solution responsive to a selected one of the analytes, a second one of said dual lumens accommodating a reference solution, and an ion sensitive membrane arranged as said integrally formed interlumen wall between said first and second ones of said dual lumens; and

    first and second sensor electrode means arranged in respective ones of said first and second ones of said dual lumens of said elongated body means for communicating electrically with respective ones of said electrolyte solution and said reference solution for detecting an electric potential.

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