Apparatus for measuring white cell count

Details Apparatus for measuring white cell count Apparatus for measuring white cell count

1977-03-24

1978-05-30

Queisser, Richard C.

Measuring and testing

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

Content or effect of a constituent of a liquid mixture

733225, 210DIG23, B01D 2126

Patent

active

040916596

ABSTRACT:
Apparatus for measuring the volume of the buffy coat and constituent cell sub-layers in blood. The apparatus includes a capillary tube with an insert disposed in the tube bore. The insert is formed of a material having a specific gravity which will enable it to float on the red cell layer of a centrifuged blood sample. The insert is an elongated body having a circular side wall, such as a cylinder, with a tapered upper end. The insert forms an annular free space with the tube bore into which the white cell layer settles. A small, axial channel is formed in or on the body to allow ready passage of the fluid constituent of the blood sample during centrifugation so as to minimize disruption of the cell layer interfaces which may otherwise occur during centrifugation of the blood sample.

REFERENCES:
patent: 3919085 (1975-11-01), Ayres
patent: 3920557 (1975-11-01), Ayres
patent: 3981804 (1976-09-01), Gigliello
patent: 4001122 (1977-01-01), Griffin

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