APPARATUS FOR THE FILTRATION OF PLASMA FROM BLOOD

摘要

A blood processing apparatus which comprises a blood circulating circuit including a plasma filter, a plasma circulating circuit for draining at least a portion of the blood plasma and for supplying a physiologically compatible fluid substitute to the subject through a portion of the blood circulating circuit, a blood pump and a drain pump, a priming fluid source adapted to be connected with the blood outlet and a fluid substitute inlet, a first detector for detecting the flow through the blood circulating circuit, a second detector for detecting the flow through the plasma circulating circuit, a first valve for selectively establishing and interrupting a first fluid circuit between a downstream portion of the plasma circulating circuit adjacent the blood outlet and that portion of the blood circulating circuit downstream of the plasma filter, a second valve for selectively establishing and interrupting a second fluid circuit between the downstream portion of the plasma circulating circuit and the outside of the apparatus, a blood pump drive for driving the blood pump to cause the priming fluid to flow through the blood circulating circuit, and a drain pump drive operable in response to an output signal from the first detector for driving the drain pump to cause the priming fluid to flow through the blood circulating circuit when the flow through the blood circulating circuit attains a first predetermined value.