Device for automatically and continuously measuring the constitu

Details Device for automatically and continuously measuring the constitu Device for automatically and continuously measuring the constitu

1982-04-23

1985-04-23

Coven, Edward M.

Surgery

Truss

Pad

422 81, 73 61R, G01N 2126

Patent

active

045123489

ABSTRACT:
At the time of drawing the blood continuously from the vein of the patient by means of a catheter and measuring the concentration of a specified constituent part contained in the blood automatically and continuously for long hours, the sample liquid and two sorts of correcting liquids (standard liquid I and base liquid) are sucked by a single sampling nozzle in prescribed order and are supplied to the measuring section through a common channel. Each of the liquids are diluted with a buffer solution at the identical rate with the manifold in the measuring section, are separated from one another through the interposition of air layers among them, and supplied to a sensor. The outputs of the measured sample liquid from the sensor are corrected by the outputs of each of the neighboring measured correcting liquids in succession and are displayed as measured values. In the blood-drawing section, there is used a double-current catheter having the first and second catheter arrangements which are constructed so as to be incorporated directly into the tube pump.

REFERENCES:
patent: 3449959 (1969-06-01), Grimshaw
patent: 3634868 (1972-01-01), Pelavin et al.
patent: 3648160 (1972-03-01), Beaver
patent: 4109505 (1978-08-01), Clark et al.
patent: 4119406 (1978-10-01), Clemens
patent: 4204430 (1980-05-01), Tamm et al.
patent: 4263406 (1981-04-01), Bostick et al.

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