Transcutaneous carbon dioxide measuring sensor

Details Transcutaneous carbon dioxide measuring sensor Transcutaneous carbon dioxide measuring sensor

G - Physics

01

N

324/23

G01N 27/36 (2006.01) A61B 5/00 (2006.01)

Patent

CA 1153794

ABSTRACT The invention is concerned with a transcutaneous carbon dioxide measuring electrode assembly comprising a top cover centrally locating a glass electrode including a tubular member made of a highly insulating material, a H+ ion sensitive glass membrane at the bottom of the tubular member and a conductive coating formed on an inner surface of the glass membrane. An external reference electrode is wrapped around the tubular member; a pair of lead wires are connected respectively to the conductive coating of the glass electrode and to the external reference electrode. A skin heating member is supported by the top cover and has a heater and a heat sensitive member. A membrane holder retains at an end portion thereof a stretched CO2 - permeable polymer membrane which is pressed against an outer surface of the glass membrane so as to squeeze a film of electrolyte therebetween. The electrode assembly of the invention is particularly useful for measuring the carbon dioxide concentration or partial pressure in the tissue or in the blood of a patient.

376480

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