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Sensor assembly suitable for blood gas analysis and the like and the method of use

  • US 4,615,340 A
  • Filed: 01/28/1986
  • Issued: 10/07/1986
  • Est. Priority Date: 02/27/1985
  • Status: Expired due to Fees
First Claim
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1. A hand-holdable sensor assembly suitable for use in a device for blood gas analysis and the like at the bedside of a patient comprising:

  • a portable housing sized to be held by the hand of a user having an open end;

    electrode means, including electrodes for sensing oxygen, carbon dioxide and hydrogen ions located inside said housing and spaced from said open end by a recess;

    a gas-permeable, ion-impermeable membrane positioned within said recess and covering said oxygen and carbon dioxide electrodes;

    means for connecting said electrodes into an electrical circuit which includes means for measuring and displaying values of pO2, pCO2 and pH sensed by the respective electrodes; and

    a blood sampler having a cavity covered by a gas and ion-permeable membrane, a port communicating with said cavity for the entry of blood therein, said port adapted for connection to a needle for penetrating a blood vessel of the patient, and a vent port communicating with said cavity, said vent port including means for allowing air to pass out of said cavity, but not blood, said sampler being removably positioned in said recess so that said membranes are in substantially face-to-face engagement and said ion electrode is in contact with said gas and ion-permeable membrane of said sampler.

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