Method and system for physiologic control of an implantable blood pump
First Claim
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1. A method of controlling a blood pump implanted in a patient, comprising:
- operating the pump at a predetermined speed;
monitoring the patient'"'"'s pump flow rate;
extracting the patient'"'"'s diastolic pump flow rate from the pump flow rate, wherein the diastolic pump flow rate is a separately isolated flow contribution below a mean pump flow rate; and
changing the predetermined speed in response to the diastolic pump flow rate, wherein changing the predetermined speed includes increasing the pump speed in response to an increase in the diastolic pump flow rate.
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Abstract
A physiologic control method and system for an implantable blood pump includes operating the pump at a predetermined speed and monitoring the patient'"'"'s diastolic pump flow rate. The predetermined speed is varied in response to the diastolic pump flow rate. The pump speed may further be adjusted in response to the patient'"'"'s heart rate. The speed may be increased and decreased in response to corresponding changes in the diastolic pump flow rate, and increased in response to an increase in heart rate.
39 Citations
20 Claims
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1. A method of controlling a blood pump implanted in a patient, comprising:
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operating the pump at a predetermined speed; monitoring the patient'"'"'s pump flow rate; extracting the patient'"'"'s diastolic pump flow rate from the pump flow rate, wherein the diastolic pump flow rate is a separately isolated flow contribution below a mean pump flow rate; and changing the predetermined speed in response to the diastolic pump flow rate, wherein changing the predetermined speed includes increasing the pump speed in response to an increase in the diastolic pump flow rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A pump system, comprising:
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a pump; and a controller having an input for receiving a blood pump flow rate signal, the controller being programmed to extract a separate diastolic pump flow rate from the blood pump flow rate signal and provide a control signal to the pump to vary the speed of the pump in response to the separate diastolic pump flow rate, wherein the separate diastolic pump flow rate is a flow contribution below a mean flow rate. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of controlling a blood pump implanted in a patient, comprising:
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monitoring the patient'"'"'s blood pump flow rate; extracting the patient'"'"'s diastolic pump flow rate from the pump flow rate, wherein the diastolic pump flow rate is a separately isolated flow contribution below a mean flow rate; changing a speed of the pump in response to the extracted diastolic pump flow rate; and
increasing the speed of the pump in response to an increase in the extracted diastolic pump flow rate. - View Dependent Claims (20)
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Specification