Boots – shoes – and leggings
Patent
1991-04-22
1994-06-28
Envall, Jr., Roy N.
Boots, shoes, and leggings
36441307, 356 39, 356426, 356427, 422 69, 422 73, G06F 1500, G01N 3348
Patent
active
053252950
ABSTRACT:
A rapid method for the simultaneous measurement of aggregation or agglutination in plurality of microtest wells or other sample-holding vessels comprises providing a plurality of light beams having discrete focal points adapted to be focused on the contents of a plurality of wells or other vessels and a plurality of photodetectors therefor, directing the light beams through the wells or other vessels and contents thereof, continuously agitating the wells or other vessels and contents thereof with a circular movement effective to permit aggregation or agglutination while preserving the integrity of the material, producing a plurality of output signals from the detectors are proportional to the light absorbencies of the beams as they pass through the wells or other vessels and contents thereof, repeatedly sampling the signals at a predetermined time interval and determining changes in optical densities from the signals obtained after each predetermined time interval by comparing each signal sampled after each predetermined time interval with the first signal sampled for the same microtest well or vessel, whereby any change in optical density which is greater than about 0.05 units is said to indicate that aggregation or agglutination occurred in the well or other vessel. The present method is suitably applied to the measurement of aggregation in platelets.
REFERENCES:
patent: 4580895 (1986-04-01), Patel
Platelet Function Testing, proceedings from Workshop on Platelets: "The Significance of Platelet Function Tests in the Evaluation of Hemostatic and Thrombotic Tendencies", Philadelphia, PA., Oct. 18-19, 1976.
Fratantoni Joseph C.
Poindexter Betty J.
Envall Jr. Roy N.
Shingala Gita D.
The United States of America as represented by the Secretary of
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