초록 ▼

The viability of a pack of stored blood platelets is monitored by gripping the pack between two plates (6) and (7) which are closed to pinch together the walls of the bag (10) along an L-shaped seal (14), leaving a channel (17), squeezing a part (15) of the bag by means of a reciprocating plunger (1

The viability of a pack of stored blood platelets is monitored by gripping the pack between two plates (6) and (7) which are closed to pinch together the walls of the bag (10) along an L-shaped seal (14), leaving a channel (17), squeezing a part (15) of the bag by means of a reciprocating plunger (19), so that the platelets continually flow to and fro between the part (15) and the part (16), through the channel (17), and passing a beam of light from an LED (27) through the channel (17), to a photoresistor (29). The AC signal from the photoresistor corresponds to the fluctuations in the intensity of the light passing through the channel (17) and the amplitude of this signal is representative of the viability, and hence the clinical acceptability, of the platelets.

대표청구항 ▼

A method of storing a bag of blood platelets while continuously agitating said bag to prolong the life of said platelets, said method comprising supporting said bag with two major opposed walls thereof generally vertical; pinching together said walls to form a substantially liquid-tight barrier to t

A method of storing a bag of blood platelets while continuously agitating said bag to prolong the life of said platelets, said method comprising supporting said bag with two major opposed walls thereof generally vertical; pinching together said walls to form a substantially liquid-tight barrier to thereby divide the interior of said bag into two parts in opposite sides of said bag, said bag parts being connected by a channel adjacent to the bottom of said bag; periodically squeezing a single one of said bag parts to cause said platelets to flow in one direction through said channel, and allowing intervening reverse flow through said channel when said squeezing is released, said reverse flow being provided solely by differential hydrostatic pressure across said channel resulting from the displacement of said platelets through said channel by said squeezing.