Electrochemical sensor
First Claim
1. An electrochemical sensor for the determination of the partial pressure of oxygen in a blood stream comprising a cathode and an anode immersed in an electrolyte contained in a chamber defined by an oxygen gas permeable membrane wherein each of the cathode and anode comprises the exposed uninsulated distal portion of a plurality of elongate insulated conductors each having an exposed uninsulated distal end surface and aproximal end;
- the elongate insulated conductors being associated with a support which positions each conductor with the insulated portions in parallel and the elongate conductor or conductors which form the anode is folded into a "U" shape so that the exposed distal end surface thereof faces the distal end surface of the cathode;
the gap between the facing distal end surfaces of the cathode and anode being filled with an electrolyte to permit the flow of electric current across the gap; and
the proximal end of each of the conductors is adapted to be connected to a current sensitive measuring device in circuit with a power source for monitoring changes in the flow of electric current between the distal end surfaces.
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Accused Products
Abstract
An electrochemical sensor for the determination of the partial pressure of oxygen in a bloodstream comprising a cathode and an anode immersed in an electrolyte contained in a chamber defined by an oxygen gas permeable membrane wherein the conductor forming the anode is folded into a "U" shape so that the exposed distal end surface thereof faces the distal end surface of the cathode.
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Citations
7 Claims
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1. An electrochemical sensor for the determination of the partial pressure of oxygen in a blood stream comprising a cathode and an anode immersed in an electrolyte contained in a chamber defined by an oxygen gas permeable membrane wherein each of the cathode and anode comprises the exposed uninsulated distal portion of a plurality of elongate insulated conductors each having an exposed uninsulated distal end surface and aproximal end;
- the elongate insulated conductors being associated with a support which positions each conductor with the insulated portions in parallel and the elongate conductor or conductors which form the anode is folded into a "U" shape so that the exposed distal end surface thereof faces the distal end surface of the cathode;
the gap between the facing distal end surfaces of the cathode and anode being filled with an electrolyte to permit the flow of electric current across the gap; and
the proximal end of each of the conductors is adapted to be connected to a current sensitive measuring device in circuit with a power source for monitoring changes in the flow of electric current between the distal end surfaces. - View Dependent Claims (2, 6, 7)
- the elongate insulated conductors being associated with a support which positions each conductor with the insulated portions in parallel and the elongate conductor or conductors which form the anode is folded into a "U" shape so that the exposed distal end surface thereof faces the distal end surface of the cathode;
- 3. A sensor according to claim 11, wherein the cathode is made of a noble metal wire and the anode is made of a silver and/or silver chloride wire.
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5. A sensor according to claim 5, wherein the cathode has a shorter length than the length of the anode.
Specification