A SINGLE-NEEDLE CIRCUIT FOR CIRCULATING BLOOD OUTSIDE THE BODY IN BLOOD TREATMENT APPARATUS

摘要

In a blood treatment apparatus, a circuit for circulating blood outside the body and designed to be connected to a patient via a single needle (7) comprises a blood treatment device proper (1), blood circulation means (8, 9) for causing blood to flow through the circuit, at least one blood expansion chamber (12, 21), and pressure regulation means (18, 25) for maintaining an adjustable pressure substantially constant at least downstream from the blood treatment device (1).