Thoratec Corporation

Tc1 LLC

Andreas Fleischli

Andre Siebenhaar

Thomas Gempp

A system and a method for starting a rotor of an implantable blood pump are described. For example, a blood pump system includes a rotary motor having a stator and a rotor. The rotor has permanent magnetic poles for magnetic levitation of the rotor, and the stator has a plurality of pole pieces arranged circumferentially at intervals. The blood pump system includes a controller configured to control a start phase of the rotor, wherein the start phase is prior to the rotor being positioned in a predefined geometric volume for pumping blood and wherein the start phase includes performing a rotation of the rotor by an angle larger than an angle corresponding to a quarter of an angular distance between two neighboring magnetic poles of the rotor.

Start-up algorithm for an implantable blood pump

A flow rate of a fluid in a flow system is determined based on one or more parameters of the flow system, the parameters not including the flow rate itself. The flow rate is also measured with a calibration sensor, and the measured flow rate is used to calibrate how the flow rate is determined.

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Zug, Switzerland

Andreas Fleischli