Monitor for diffusable chemical substance

Details Monitor for diffusable chemical substance Monitor for diffusable chemical substance

1999-01-25

2000-08-08

Winakur, Eric F.

Surgery

Diagnostic testing

Measuring or detecting nonradioactive constituent of body...

600309, 422 681, A61M 134, G01N 3348

Patent

active

060994703

ABSTRACT:
A monitor for analyzing a body fluid for diffusable chemical substances has a liquid filled probe, for example a catheter, having a region contactable with the body fluid within the body and permeable to chemical substances of interest. A sensor unit is in liquid communication with the probe and has sensors, each with an output dependent on the presence of a chemical substance of interest. A periodic analysis of the probe liquid is provided from the sensor unit and a pumping system is adapted to circulate the probe liquid around a closed liquid flow path, including the permeable region of the probe, a number of times in each period between the analysis of the liquid.

REFERENCES:
patent: 4221567 (1980-09-01), Clark et al.
patent: 4274417 (1981-06-01), Delpy
patent: 5058416 (1991-10-01), Engelhardt et al.
patent: 5148811 (1992-09-01), Messinger
patent: 5248616 (1993-09-01), Beckman et al.

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