Flow sensing devices can be used for sensing flow rates of fluids flowing within a conduit. Systems can be used for controllably infusing a patient with a therapeutic medical fluid using the flow sensing devices for closed-loop control of the therapeutic medical fluid infusion flow rate. During the procedure, at least one calibration of the measuring process and the storage of at least one calibration value are performed. A control unit regulates the control valve or the syringe pump while using at least one measurement performed by the measuring device and taking into account at least one calibrated value towards the desired flow volume.
