| 摘要 |
An artificial kidney has a circuit for blood with a single needle, a semipermeable membrane preferably connected to a blood flow oscillation damper, an arterial pump upstream of the membrane and a venous pump downstream of it and a perfusion pump connecting a perfusion device to the circuit controlled by one of the other two pumps.Blood from one branch (11) of a Y-connector (10) fitted to a needle or catheter is drawn through pvc tubing by a peristaltic pump (12) operating at arterial pressure and fed to a haemodialyser (13). The haemodialyser is divided into a compartment for blood (15) and one for dialysis fluid (16) by a semipermeable membrane (14). A second pump (19), operating at venous pressure, draws blood through a tube (17) extending from the haemodialyser to a T-connector (25). One branch of the connector is fitted to a bubble trap (18) with a filter (22) connected to the Y-connector by a further tube (21). A safety clamp (26) in this tube is controlled by a bubble detector (20). A reservoir of perfusion fluid (24) communicates with the T-connector via a third pump (24) slaved to the venous pump by a controller (27) |
