Abstract: A machine (1) for extracorporeal blood treatment comprises a device (2) for ultrafiltration of a liquid through a semi-permeable membrane (3) of a blood treatment device (4), a first sensor (11) for ultrafiltration rate through the membrane, a second group of sensors (13) for measuring a trans-membrane pressure, an infusion line (16) with an infusion pump (17) and a programmed controller (14) for calculating a maximum infusion rate as a function of the transmembrane pressure. The machine is suitable for kidney failure treatments, such as hemofiltration and hemodiafiltration. In a relatively short time the machine enables a large quantity of corporeal blood to be removed from the patient.

Abstract: A pump for pumping a fluid through a flexible tube is disclosed including a housing having an inlet and an outlet, in which the inlet and outer include seats for retaining the flexible tube, and including an adjustable lock for locking the flexible tube against these seats at the inlet and outlet. This is preferably accomplished by a common actuator for simultaneously adjusting the locks at both the inlet and the outlet.