Blood flow meter
First Claim
Patent Images
1. A blood pump system, comprising:
- a blood pump having an inflow conduit for receiving blood from a ventricle of a heart and an outflow conduit for returning blood to a circulatory system; and
a controller operably connected to the blood pump;
wherein the controller is configured to periodically;
reduce a speed of the blood pump to cause an inflow conduit pressure at the inflow conduit to be substantially equal to or greater than an outflow conduit pressure at the outflow conduit;
operate the blood pump at the reduced speed for a set length of time or number of heart beats; and
after operating the blood pump at the reduced speed for the set length of time or number of heart beats, increase the speed of the blood pump.
3 Assignments
0 Petitions
Accused Products
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.
93 Citations
16 Claims
-
1. A blood pump system, comprising:
-
a blood pump having an inflow conduit for receiving blood from a ventricle of a heart and an outflow conduit for returning blood to a circulatory system; and a controller operably connected to the blood pump; wherein the controller is configured to periodically; reduce a speed of the blood pump to cause an inflow conduit pressure at the inflow conduit to be substantially equal to or greater than an outflow conduit pressure at the outflow conduit; operate the blood pump at the reduced speed for a set length of time or number of heart beats; and after operating the blood pump at the reduced speed for the set length of time or number of heart beats, increase the speed of the blood pump. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A blood pump system, comprising:
-
a blood pump having an inflow conduit for receiving blood from a ventricle of a heart and an outflow conduit for returning blood to a circulatory system; and a controller operably connected to the blood pump; wherein the controller is configured to periodically; operate the blood pump at a first speed; reduce the speed of the blood pump from the first speed to a second speed at which an inflow conduit pressure at the inflow conduit is substantially equal to or greater than an outflow conduit pressure at the outflow conduit; operate the blood pump at the second speed for a set length of time or number of heart beats; and after operating the blood pump at the second speed for the set length of time or number of heart beats, increasing the speed of the blood pump from the reduced speed to the first speed. - View Dependent Claims (15, 16)
-
Specification