Blood tube system for extracorporeal applications such as dialysis devices, comprising an expansion chamber providing a small air-blood contact surface

摘要

A central region (3) of the expansion chamber has a considerably-reduced cross section. The blood level (11) can be adjusted using the air vent valve (7), such that the blood-air contact interface lies in the central region (3). The central region is in the form of a cylindrical riser tube (3). An annular insert fastened in the expansion chamber, contains the central region. The upper and lower sides of the insert, have concave wall surfaces (2).