Blood collection cannula of a heart function replacing or supporting pump

摘要

The invention relates to a blood sampling cannula (4) for connecting a pump (2) supporting the heart function to the internal volume of a heart ventricle (1), in particular the left ventricle, which has a pressure sensor (7a, 7b) at its end in the ventricle ) for measuring the ventricular pressure and / or ventricular pressure differences and at the same cannula end has a volume sensor (3a, 3b, 5, 6) for measuring the volume and / or volume changes of the ventricle (1) in at least a portion of the ventricle. The invention furthermore relates to a measuring device for monitoring the ventricular contractions and / or the function of a pump replacing or supporting the heart function, which is connectable to the pressure sensor (7a, 7b) and the volume sensor of a blood sampling tube according to one of the preceding claims and is set up, To detect pressure changes and volume changes of a ventricle (1) during the heartbeat. Furthermore, the invention also relates to a method for adjusting the volume flow and / or delivery pressure of a cardiac function replacing or supporting pump (2) by means of a blood collection cannula (4) blood from a ventricle (1) of the heart promotes and promotes into the aorta of the heart in which the pressure and volume changes in the ventricular contractions are detected by means of a pressure sensor (7a, 7b) and volume sensor (3a, 3b, 5, 6) located in the ventricle and from these changes a measure of the current heart work and / or the change of heart work is determined and set in dependence of this measure the flow and / or the delivery pressure of the pump (2) and / or adjusted.