Prevention of aortic valve fusion
AssigneeTc1 LLC
InventorVictor Poirier
Life of this patent
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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.
Claims17
A method of controlling a blood pump to facilitate gradual weaning of a patient from the blood pump, the blood pump receiving a flow of blood from a ventricle of the patient and outputting the flow of blood to an artery of the patient, the method comprising:
- controlling, by a controller, a speed of the blood pump over a first period of time encompassing multiple contractions of the ventricle to provide circulatory support to the patient to maintain a positive level of systolic blood pressure within the ventricle within a first predetermined range;
- subsequent to the first period of time, controlling, by the controller, the speed of the blood pump over a second period of time encompassing multiple contractions of the ventricle to provide a reduced level of circulatory support to the patient relative to the circulatory support provided to the patient over the first period of time;
- subsequent to the second period of time, controlling, by the controller, the speed of the blood pump over a third period of time encompassing multiple contractions of the ventricle to provide circulatory support to the patient to maintain a positive level of systolic blood pressure within the ventricle within the first predetermined range;
- and
- determining, by the controller, whether the ventricle provided circulatory support to the patient over the second period of time that exceeded a predetermined minimum level of circulatory support.
A method of controlling a blood pump to facilitate gradual weaning of a patient from the blood pump, the blood pump receiving a flow of blood from a ventricle of the patient and outputting the flow of blood to an artery of the patient, the method comprising:
- receiving, by a controller, an input indicative of a blood pressure within the ventricle;
- and
- controlling, by the controller, a speed of the blood pump such that:
- a blood pressure within the ventricle is maintained equal to or greater than a lower threshold for avoiding ventricular collapse, and
- the blood pressure within the ventricle is maintained equal to or less than an upper threshold to maintain an end diastolic blood pressure within an acceptable range.
Dependencies are inferred from the claim text.