Method of performing measurement of hematocrit value and separat

Details Method of performing measurement of hematocrit value and separat Method of performing measurement of hematocrit value and separat

1989-03-13

1990-07-10

Noland, Tom

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Content or effect of a constituent of a liquid mixture

7386302, G01N 3349

Patent

active

049399250

ABSTRACT:
A method of performing measurement of a hematocrit value and separate sampling of plasma and blood cells, simultaneously. A probe including a pair of detection electrodes each in the form of a suction nozzle, is lowered from a certain initial height into a sample vessel containing blood that has bveen separated into an upper plasma layer and a lower blood cell layer, while the probe travel distance is monitored. When the detection electrodes touch the surface of the plasma layer, the plasma is sampled into a corresponding sampling vessel through one of the electrode suction nozzles. The probe is then lowered further until the electrodes touch the surface of the blood cell layer, and the blood cells are sampled into a different sampling vessel through the other one of the suction nozzles. A total sample blood volume and the volume of the blood cells are calculated in accordance with the measured travel of the probe between the upper and lower layers, and a hematocrit value is determined from the calculated volumes.

REFERENCES:
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patent: 4028930 (1977-06-01), Moreno
patent: 4219440 (1980-08-01), Runck et al.
patent: 4487830 (1984-12-01), Takaganagi et al.
patent: 4577514 (1986-03-01), Bradley et al.
patent: 4829837 (1989-05-01), Telfer
patent: 4848900 (1989-07-01), Kuo et al.

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