Blood circuit with leak-safe features

摘要

A leak safe access needle and blood circuit are combined in a fluid circuit with the access needle configured as a double lumen access needle whose venous line is permanently attached to the fluid circuit. The arterial line has an air detection device. In this configuration, the only way the venous line can be disconnected is for the access needle to be withdrawn from the patient, which will necessarily result in disconnection of the arterial line, which in turn will be detected by air infiltration into the arterial line. This combination ensures that venous disconnects are revealed by the air detection. Other embodiments allow non-permanent connection of the venous line.