SYSTEM ELEMENTS FOR MEASURING PRESSURE IN EXTRACORPOREAL CIRCUITS

摘要

The invention relatest to a system element for releasably sealingly connecting a transducer to a fluid system in order to reduce the risk of haemolysis in extracorporeal blood circulation, comprising a measuring chamber (7) which can be connected to the fluid system in such a way as to allow throughflow. Part of the wall of the measuring chamber (7) is formed by a membrane (11) having a peripheral built-up section (20) which is located on the side of the membrane (11) that faces towards the measuring chamber (7). Said built-up section (20) engages in a channel (19) which is formed in the housing (10) and which extends around the measuring chamber (7). The wall (inner wall 16) of the channel (19) that faces towards the measuring chamber (7) is lower than the wall (outer wall 17) of the channel (19) that faces away from the measuring chamber (7) (19). The transducer contains a pressure transmitting fluid or gel and a pressure sensor whose measuring range has differential pressures of at least -250 mm Hg to +1000 mm Hg in relation to the surroundings.