G - Physics – 01 – N
Patent
G - Physics
01
N
73/45
G01N 33/49 (2006.01)
Patent
CA 1308934
ABSTRACT OF THE DISCLOSURE A method and apparatus for measuring the aggregation of blood platelets and the coagulation of blood, said apparatus being comprised of a capillary tube for drawing blood, a piston located within the capillary tube and connected to a motor means capable of providing linear displacement to the piston, a pressure sensor adapted to sense pressure in the space located between the drawn blood and piston, and a computing means or microprocessing means for comparing the sensed pressure from the pressure sensor with a predetermined value, and providing a measured regulating output to the motor means. The method for measuring the aggregation of blood platelets and coagulation of blood comprises the steps of drawing blood into the capillary tube means of the movable piston until a desired pressure is achieved within such capillary tube, and allowing the computing means to then maintain by adjustment of the piston position the pressure within the capillary tube. The computing means is able to determine the amount of blood flowing into the capillary tube during constant pressure regulation, and hence the amount of aggregation of blood platelets and blood coagulation due to a known relationship relating movement of the piston to blood drawn into the cylinder.
523330
Baxter Diagnostics Inc.
Riches Mckenzie & Herbert Llp
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