Polarographic gas sensors

Details Polarographic gas sensors Polarographic gas sensors

G - Physics

01

N

324/27

G01N 27/48 (2006.01) A61B 5/00 (2006.01) G01N 27/30 (2006.01)

Patent

CA 1201168

ABSTRACT "Polarographic Gas Sensors" Thin film polarographic gas sensors are described wherein the elec- trodes are deposited on a flexible substrate. A bilumen monopolar catheter- type sensor has a thin cathode layer (8) deposited on the wall of one lumen (4), the distal end of which is sealed by a polyurethane plug (10) such that only the outer edge surface of the cathode layer (8) is in contact with a dip-coated permeable membrane (14). The cathode layer (8) extends to the proximal end of the catheter (2) where electrical contact is made with a conductor wire (16) through electrically-conductive epoxy resin (18). When the sensor is employed umbilically or intravascularly, the second lumen (6) may be employed to with- draw samples from the patient or supply fluids thereto. The cathode layer (8) may be deposited on the catheter material in long lengths, which are then sub- sequently cut to the appropriate length for individual catheter-type sensors.

418923

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