Pressure/Flow Characteristic Modification of a Centrifugal Pump in a Ventricular Assist Device
First Claim
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1. A ventricular assist device comprising:
- a centrifugal pump; and
a controller, wherein the controller is configured to at least;
cause the centrifugal pump to operate at a first speed above a predetermined flow rate; and
cause the centrifugal pump to operate at a second speed below the predetermined flow rate, wherein the predetermined flowrate is indicative of a crossover point between systole and diastole phases of a person'"'"'s cardiac cycle.
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Abstract
A ventricular assist device is disclosed. The ventricular assist device may include a centrifugal pump and a controller. The controller may be configured to cause the centrifugal pump to operate at a first speed above a predetermined flow rate. The controller may also be configured to cause the centrifugal pump to operate at a second speed below the predetermined flow rate, wherein the predetermined flowrate is indicative of a crossover point between systole and diastole phases of a person'"'"'s cardiac cycle.
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Citations
20 Claims
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1. A ventricular assist device comprising:
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a centrifugal pump; and a controller, wherein the controller is configured to at least; cause the centrifugal pump to operate at a first speed above a predetermined flow rate; and cause the centrifugal pump to operate at a second speed below the predetermined flow rate, wherein the predetermined flowrate is indicative of a crossover point between systole and diastole phases of a person'"'"'s cardiac cycle.
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2. A method of controlling a centrifugal pump in a ventricular assist device of a person, wherein the method comprises:
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causing the centrifugal pump to operate at a first speed above a predetermined flow rate; and causing the centrifugal pump to operate at a second speed below the predetermined flow rate, wherein the predetermined flowrate is indicative of a crossover point between systole and diastole phases of the person'"'"'s cardiac cycle. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A controller for operating a centrifugal pump in a ventricular assist device of a person, wherein the controller comprises:
one or more processors configured to execute instructions stored on a non-transitory medium, the instructions executable by the one or more processors to at least; cause a centrifugal pump to operate at a first speed above a predetermined flow rate; and cause the centrifugal pump to operate at a second speed below the predetermined flow rate, wherein the predetermined flowrate is indicative of a crossover point between systole and diastole phases of the person'"'"'s cardiac cycle. - View Dependent Claims (15, 16, 17)
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18. A non-transitory machine readable medium having instructions stored thereon for operating a centrifugal pump in a ventricular assist device of a person, the instructions executable by one or more processors to at least:
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cause a centrifugal pump to operate at a first speed above a predetermined flow rate; and cause the centrifugal pump to operate at a second speed below the predetermined flow rate, wherein the predetermined flowrate is indicative of a crossover point between systole and diastole phases of a person'"'"'s cardiac cycle. - View Dependent Claims (19, 20)
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Specification