Apparatus and methods for measuring pressure and flow in cardiac assist devices and peripheral vasculature
First Claim
1. Apparatus comprising:
- a cardiac assist device coupled via blood-carrying conduits between a selected chamber of a patient'"'"'s heart and a selected portion of the patient'"'"'s blood circulatory system;
one or more sensors disposed in one or more of the blood-carrying conduits and/or a selected location in the patient'"'"'s blood circulatory system that sense pressure and/or flow in the conduits and/or blood circulatory system; and
a monitoring device coupled to the one or more sensors for determining pressure and/or blood flow in the blood circulatory system using pressures and/or flow rates derived from the one or more sensors.
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Accused Products
Abstract
Disclosed are apparatus and methods for measuring pressure and/or flow in blood circulatory systems of a patient using cardiac assist devices. By way of example, a left ventricular assist device may be coupled between the left ventricle of the patient'"'"'s heart and the aorta. One or more sensors, such as pressure sensors, are located at one or more selected locations in the heart, in blood-carrying conduits that are coupled to the cardiac assist device, or in the aorta, that sense pressure, for example, to monitor a patient'"'"'s cardiac function. A monitoring device is coupled to the sensors that implements an algorithm that determines pressure and/or blood flow rate in the circulatory system using pressures and/or flow data derived from the sensors.
14 Citations
13 Claims
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1. Apparatus comprising:
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a cardiac assist device coupled via blood-carrying conduits between a selected chamber of a patient'"'"'s heart and a selected portion of the patient'"'"'s blood circulatory system; one or more sensors disposed in one or more of the blood-carrying conduits and/or a selected location in the patient'"'"'s blood circulatory system that sense pressure and/or flow in the conduits and/or blood circulatory system; and a monitoring device coupled to the one or more sensors for determining pressure and/or blood flow in the blood circulatory system using pressures and/or flow rates derived from the one or more sensors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Apparatus comprising:
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a left ventricular assist device coupled via blood-carrying conduits between the left ventricle of a patient'"'"'s heart and the aorta; one or more pressure sensors disposed in one or more of the blood-carrying conduits and/or the aorta that sense pressure and/or flow in the patient'"'"'s blood circulatory system; and a monitoring device coupled to the one or more sensors for determining pressure and/or blood flow in the blood circulatory system using pressures and/or flow rates derived from the one or more sensors.
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10. A method comprising:
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coupling a cardiac assist device coupled via blood-carrying conduits between a selected chamber of a patient'"'"'s heart and a selected portion of the patient'"'"'s blood circulatory system; disposing one or more sensors in one or more of the blood-carrying conduits and/or a selected location in the patient'"'"'s blood circulatory system; and determining pressure and/or flow in the patient'"'"'s blood circulatory system using pressures and/or flow rates derived from the one or more sensors. - View Dependent Claims (11, 12, 13)
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Specification