Chemistry: analytical and immunological testing – Clotting or clotting factor level tests
Patent
1997-12-12
1999-06-01
Wallenhorst, Maureen M.
Chemistry: analytical and immunological testing
Clotting or clotting factor level tests
436164, 436165, 436177, 436178, 422 55, 422 58, 422 73, 422101, 422102, 73 6441, 73 6443, G01N 3386
Patent
active
059087862
ABSTRACT:
A device and method are disclosed for determining whether or not an individual's blood coagulation time is in a normal or abnormal range, and is particularly suitable for measuring prothrombin time and activated partial thromboplastin time coagulation values. The device includes a housing with an area for receiving a sample, a capillary channel or elongated area with an absorbent material, and a gradient heater. Liquid crystal and a coagulation agent can be disposed within the device to mix with a sample added to the device. The mixture passes along the capillary channel or absorbent material and stops moving when the sample has clotted. Due to the gradient heater and liquid crystal, the mixture may or may not change color, depending upon whether the individual has a an abnormally short, normal, or abnormally long clot time.
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Moreno Mario
Wu Jogin R.
Akzo Nobel N.V.
Muir Gregory R.
Wallenhorst Maureen M.
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