Cardiac pump with speed adapted for ventricle unloading
AssigneeTc1 LLC
InventorsAlexander Medvedev, Masamichi Yanai
Life of this patent
Estimating the term…
Abstract
A blood pump system is implantable in a patient for ventricular support. A pumping chamber has an inlet for receiving blood from a ventricle of the patient. An impeller is received in the pumping chamber. A motor is coupled to the impeller for driving rotation of the impeller. A motor controller is provided for tracking systolic and diastolic phases 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. The impeller speed comprises a ramping up to an elevated speed during the diastolic phase in order to reduce a load on the ventricle at the beginning of the systolic phase.
Claims21
(canceled)
A blood pump, comprising:
- a chamber including an impeller driven by a motor;
- and
- at least one processor for at least:
- determining a time period of a diastolic phase or a time period of a systolic phase of a cardiac cycle of a user;
- and
- varying the speed of the motor, based on the time period of the diastolic phase or the time period of the systolic phase, such that a speed of the motor begins ramping up during the diastolic phase.
A non-transitory machine readable medium having instructions stored thereon for controlling a motor of a blood pump comprising a chamber including an impeller driven by a motor, the instructions executable by at least one processor to at least:
- determine a time period of a diastolic phase or a time period of a systolic phase of a cardiac cycle of a user;
- and
- vary the speed of the motor, based on the time period of the diastolic phase or the time period of the systolic phase, such that a speed of the motor begins ramping up during the diastolic phase.
A method for controlling a motor of a blood pump comprising a chamber including an impeller driven by a motor, wherein the method comprises:
- determining a time period of a diastolic phase or a time period of a systolic phase of a cardiac cycle of a user;
- and
- varying the speed of the motor, based on the time period of the diastolic phase or the time period of the systolic phase, such that a speed of the motor begins ramping up during the diastolic phase.
Dependencies are inferred from the claim text.