Method and apparatus for making a rapid measurement of the hemat

Details Method and apparatus for making a rapid measurement of the hemat Method and apparatus for making a rapid measurement of the hemat

1978-08-28

1981-12-01

McGraw, Vincent P.

Optics: measuring and testing

Blood analysis

356442, 356432, G01N 3348, G01N 2100, G01N 2184

Patent

active

043033369

ABSTRACT:
The method includes the steps of: placing blood in a transparent tubing; passing intense, coherent light through the tubing and blood; sensing the light passed through the tubing and blood; and, producing a signal related to the amount of transmitted light sensed and indicative of the hematocrit of the blood. The apparatus includes a laser light source for generating the intense, coherent light beam at a wavelength in the red spectrum and an optical photodetector including a silicon diode positioned to receive the transmitted light and an amplifier circuit.

REFERENCES:
patent: 2700320 (1955-01-01), Malmros
patent: 3123066 (1964-03-01), Brumley
patent: 3830569 (1974-08-01), Meric
patent: 3923397 (1975-12-01), Shuck
Skoog et al., Fundamentals of Analytical Chemistry, 1963, pp. 682-683.

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