Blood testing tool
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 2, 2004
Grant Date -
Jun 28, 2001
app pub date -
Dec 27, 2000
filing date -
Dec 28, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A blood testing tool is provided, which separates blood cells and can collect blood plasma or blood serum with a high yield. The blood testing tool includes an asymmetric porous membrane with a pore size distribution in which an average pore size varies to be reduced continuously or discontinuously in a thickness direction. The porous membrane includes a blood supply portion, a development portion, and a blood-cell blocking portion formed between the blood supply portion and the development portion and pores in the blood cell blocking portion include only pores through which blood cells cannot pass. When blood is supplied to one side with larger pores of the blood supply portion, the blood moves in a direction parallel to a surface of the porous membrane by a capillary phenomenon, but only blood plasma or blood serum moves into the development portion to develop.
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