MAXIMIZING BLOOD PUMP FLOW WHILE AVOIDING LEFT VENTRICLE COLLAPSE
First Claim
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1. A blood pump system, comprising:
- a blood pump having an inflow conduit for receiving blood from a left ventricle of a heart and an outflow conduit for returning blood to a circulatory system; and
a controller operably connected to said blood pump;
wherein said inflow conduit comprises a sensor located to detect a conduit pressure that is substantially the same as left ventricular pressure, wherein said sensor is adapted to send a signal regarding said conduit pressure to said controller, and wherein said controller is adapted to send a signal to said blood pump such that the speed of said blood pump is reduced if said conduit pressure is less than a low threshold level.
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Abstract
Materials and methods related to blood pump systems are described. These can be used in patients to, for example, monitor arterial pressure, measure blood flow, maintain left ventricular pressure within a particular range, avoid left ventricular collapse, prevent fusion of the aortic valve in a subject having a blood pump, and provide a means to wean a patient from a blood pump.
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Citations
13 Claims
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1. A blood pump system, comprising:
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a blood pump having an inflow conduit for receiving blood from a left ventricle of a heart and an outflow conduit for returning blood to a circulatory system; and a controller operably connected to said blood pump; wherein said inflow conduit comprises a sensor located to detect a conduit pressure that is substantially the same as left ventricular pressure, wherein said sensor is adapted to send a signal regarding said conduit pressure to said controller, and wherein said controller is adapted to send a signal to said blood pump such that the speed of said blood pump is reduced if said conduit pressure is less than a low threshold level. - View Dependent Claims (2, 3, 4, 5)
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6. A method for maintaining left ventricular pressure within a preselected range while avoiding left ventricular collapse in a subject having a blood pump system, comprising:
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detecting left ventricular pressure in said subject via a sensor at an inflow conduit of said blood pump system; and increasing, maintaining, or reducing the speed of said blood pump based on said detected left ventricular pressure, wherein said speed is reduced if said detected left ventricular pressure is less than a lower threshold level, and wherein said speed is increased if said detected left ventricular pressure is greater than an upper threshold level. - View Dependent Claims (7, 8, 9, 10)
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11. A method for controlling blood flow in a subject having a blood pump system, comprising:
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detecting blood flow in said subject via a sensor at an inflow conduit of said blood pump system; and increasing, maintaining, or reducing the speed of said blood pump based on said detected blood flow, wherein said speed is increased if said detected blood flow is less than a lower threshold level, and wherein said speed is reduced or maintained if said detected blood flow is greater than an upper threshold level. - View Dependent Claims (12, 13)
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Specification