Importance

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Abstract

A sensor assembly for a combination infusion fluid delivery system and blood chemistry analysis system includes a sensor assembly with each of the assembly electrodes mounted in an electrode cavity in the assembly. Each electrode cavity includes a circular ridge that defines a cylindrical inner cavity and a ring-shaped outer cavity. The circular ridge prevents the water soluble gel from wicking into the surrounding selectively-permeable membrane, and thereby provides easier manufacture, higher yield rates, and longer shelf life. A helical groove increases turbulence in the assembly, reducing the purge volume needed to flush the assembly after each sample measurement. The system includes provision for delivering the infusion fluid and measuring blood chemistry during reinfusion of the blood at approximately the same flow rates.

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First Claim