Liquid purification or separation – Processes – Including controlling process in response to a sensed condition
Patent
1992-08-07
1994-03-29
Dawson, Robert A.
Liquid purification or separation
Processes
Including controlling process in response to a sensed condition
210 87, 210 97, 210103, 210143, 21032165, 2103601, 494 37, 604 5, B01D 2130, B01D 2126
Patent
active
052981711
ABSTRACT:
In a separation device for separation of blood into its components, the hematocrit value of the blood to be separated plays a significant role relative to the sedimentation of cellular blood components. Since in blood processing, particularly in the intraoperative area, significant fluctuations of the incoming hematocrit value may occur, for example, due to infused volume expander, irrigation solutions, anticoagulant additives, etc., it is useful for maintenance of a blood separation working with constant values, particularly a constant hematocrit value of the erythrocyte fraction, to take the preset hematocrit value of the blood to be separated into account. According to the invention, the rate of blood flow through the separation device is automatically adjusted as a function of the hematocrit value of the incoming blood.
REFERENCES:
patent: 3957197 (1976-05-01), Sartory et al.
patent: 4185629 (1980-01-01), Cullis et al.
patent: 4964847 (1990-10-01), Prince
patent: 4968295 (1990-11-01), Neumann
Dawson Robert A.
Fresenius AG
Kim Sun Uk
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