Chemistry: physical processes – Physical processes – Crystallization
Patent
1976-02-17
1977-06-21
Serwin, R.E.
Chemistry: physical processes
Physical processes
Crystallization
23230B, 356 39, 356 40, G01N 3316
Patent
active
040308880
ABSTRACT:
A fully automatic system is disclosed for determining the seven blood parameters, red blood counts (RBC), hematocrit (HCT), white blood counts (WBC), mean corpuscular hemoglobin (MCH), mean corpuscular volume (MCV) and mean corpuscular hemoglobin concentration (MCHC). The blood sample collected is divided into two solutions, one for use in red blood counts and subjected to the colorimetric analysis for HGB determination and the other for use in white cell counts. A portion of the RBC solution is subjected to the double blood dilution and it enters a red cell counting portion. The peak value of electrical pulses supplied by said counting portion is indicative of the hematocrit. These data are used by preset arithmetic circuits to determine MCH, MCV and MCHC. White blood corpuscles are counted by a counting means of the same structure as that of the red cell counting portion. The flow of a diluent and the blood solution starting from the introduction of the sample, to counting portions, means for determination, and to the outlets are controlled by the supply of either vacuum or pneumatic pressure into two rotary proportioning cocks and chambers positioned upstream or downstream thereof.
REFERENCES:
patent: 3764267 (1973-10-01), Farr
patent: 3861877 (1975-01-01), Matharani et al.
patent: 3893767 (1975-07-01), Fulwyler et al.
patent: 3901658 (1975-08-01), Burtis et al.
patent: 3923397 (1975-12-01), Shuck
patent: 3963350 (1976-06-01), Watanabe et al.
Oka Masaaki
Yamamoto Hiroshi
Serwin R.E.
TOA Medical Electronics Co., Ltd.
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