A short description of the standard devices with extra-corporal or intracorporal pumps is followed by a description of a new extracorporal pump. Since the new pump is independent of electric mains supply, it is more comfortable for the patient, who can walk around even during intraarterial infusion. However, as the flow rate of the pump is low, very thin catheters have to be used to avoid clotting caused by blood reflux within the catheter.