Differential carbon dioxide sensor
First Claim
1. A differential-type carbon dioxide sensor comprising:
- a pH electrode having a pH-sensitive membrane;
a bicarbonate electrode having a bicarbonate-sensitive membrane;
a chloride electrode having a membrane with no selectivity towards bicarbonate and towards salicylate being within a predetermined therapeutic range, wherein the pH electrode, the bicarbonate electrode, and the chloride electrode operate in tandem with each other; and
a reference electrode being enclosed in a chamber;
wherein each of the pH electrode, bicarbonate electrode, and chloride electrode comprise;
a base;
a cavity formed within the base, the cavity containing a fluid and an electrode membrane;
an inlet lumen providing fluid communication through the base to the cavity;
an outlet lumen providing fluid communication through the base to the cavity;
wherein the inlet lumen and the outlet lumen defining a fluid flow path.
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Abstract
The present disclosure describes a differential-type carbon dioxide sensor, which includes a pH-electrode, a bicarbonate electrode, and a chloride electrode, and a reference electrode, which is enclosed in a chamber. The pH electrode has a pH-sensitive membrane and the bicarbonate electrode has a bicarbonate-sensitive membrane, which comprises 30% by weight of a polymer matrix, 30% by weight of a carbonate or bicarbonate ion-selective material, 30% by weight of a plasticizer, and 10% by weight of a lipophilic additive based on total weight of the bicarbonate-sensitive membrane. Further, the chloride electrode has a membrane with no selectivity towards bicarbonate and towards salicylate, which is within a predetermined therapeutic range having a concentration of salicylate less than 1.5 mmol/L. The pH electrode, the bicarbonate electrode, and the chloride electrode operate in tandem with each other.
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Citations
9 Claims
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1. A differential-type carbon dioxide sensor comprising:
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a pH electrode having a pH-sensitive membrane; a bicarbonate electrode having a bicarbonate-sensitive membrane; a chloride electrode having a membrane with no selectivity towards bicarbonate and towards salicylate being within a predetermined therapeutic range, wherein the pH electrode, the bicarbonate electrode, and the chloride electrode operate in tandem with each other; and a reference electrode being enclosed in a chamber; wherein each of the pH electrode, bicarbonate electrode, and chloride electrode comprise; a base; a cavity formed within the base, the cavity containing a fluid and an electrode membrane; an inlet lumen providing fluid communication through the base to the cavity; an outlet lumen providing fluid communication through the base to the cavity; wherein the inlet lumen and the outlet lumen defining a fluid flow path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification