Method and apparatus for measuring blood constituent counts

Details Method and apparatus for measuring blood constituent counts Method and apparatus for measuring blood constituent counts

1985-12-27

1987-07-28

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Counting animate or inanimate entities

356 39, 356338, 250338, G01N 1502, G01N 2100

Patent

active

046835792

ABSTRACT:
Blood constituents such as red cells, white cells, and platelets are centrifuged into layers in a capillary tube and the true extent of one or more of the layers is measured photometrically. Each layer to be measured is optically scanned by a sequence of scanning operations with the actual extent of each layer traverse being recorded in a computer. After each layer has been completely circumferentially scanned and each traverse recorded, the computer determines the true average axial dimension for each layer and computes, through prior input, the actual constituent count for each constituent layer.

REFERENCES:
patent: 3349227 (1967-10-01), Martens et al.
patent: 4027971 (1977-06-01), Kolman et al.
patent: 4528680 (1985-07-01), Archambeault
patent: 4558947 (1985-12-01), Wardlaw

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