| abstract |
The invention relates to a method for determining at least one flow speed or a fluid volume flow rate (5) of a fluid flowing through an implanted, vascular assistance system (1), comprising the following steps: a) carrying out a pulsed Doppler measurement by means of an ultrasonic sensor (2) of the assistance system (1), b) evaluating a measurement result from step a), which has a possible ambiguity, c) providing at least one operating parameter of a flow machine (3) of the assistance system (1), d) ascertaining at least the flow speed or the fluid volume flow rate (5) using the measurement result evaluated in step b), wherein the possible ambiguity of the measurement result is corrected using the operating parameter. |