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Oxygen sensor for rapid blood gas analysis

  • US 4,533,456 A
  • Filed: 04/05/1984
  • Issued: 08/06/1985
  • Est. Priority Date: 04/05/1984
  • Status: Expired due to Term
First Claim
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1. In a system for analysis of partial pressures of gases in blood, an oxygen sensor comprising:

  • (a) an oxygen permeable membrane to which blood samples are periodically exposed for a predetermined time period;

    (b) an electroylte acceptor for oxygen which passes through said membrane;

    (c) an anode electrode and a cathode electrode, which both are immersed in said electroyte; and

    the improvement which comprises(d) means for substantially replacing the electrolyte in said sensor prior to each presentation of respective samples to the other side of said membrane;

    (e) control means automatically operating a switch means for establishing an open circuit condition between said electrodes during replacement of said electrolyte and during and for a first predetermined time after presentation of each of said samples, and for polarizing said electrodes at a predetermined voltage for a second predetermined time; and

    (f) means for measuring current between said electodes at the end of said second predetermined time.

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