Patent ID: 9713663
Date: 2017-07-25
CPC Classifications: A61M

Claim:
1. A blood pump system for implanting in a patient for ventricular support, comprising: a pumping chamber having an inlet for receiving blood from a ventricle of the patient; an impeller received in the pumping chamber; a motor coupled to the impeller for driving rotation of the impeller; and a motor controller for determining a time period of a systolic phase and a time period of a diastolic phase of a cardiac cycle of the patient, and supplying a variable voltage signal to the motor in a variable speed mode to produce a variable impeller speed linked to the cardiac cycle, wherein the impeller speed comprises a ramping up to an elevated speed beginning at a point in time during the determined time period of the diastolic phase, and prior to the determined time period of the systolic phase in order to reduce a load on the ventricle at the beginning of the systolic phase.