Control of circulatory assist systems
First Claim
Patent Images
1. A blood pump system, comprising:
- a first rotary blood pump configured to be connected to a patient'"'"'s left ventricle to pump blood from the left ventricle to the patient'"'"'s ascending aorta via a first outflow graft;
a second rotary blood pump configured to be connected to a patient'"'"'s right ventricle to pump blood from the right ventricle to the patient'"'"'s pulmonary system via a second outflow graft; and
a blood pump controller including;
an input interface configured to;
receive a first signal indicative of blood flow rate through a first rotary blood pump configured to be connected to a patient'"'"'s left ventricle and pump blood from the left ventricle to the patient'"'"'s ascending aorta via a first outflow graft; and
receive a second signal indicative of blood flow rate through a second rotary blood pump different from the first rotary blood pump and configured to be connected to the patient'"'"'s right ventricle and pump blood from the right ventricle to the patient'"'"'s pulmonary system via a second outflow graft; and
a processing unit configured to generate and transmit separate control signals to the first and second rotary blood pumps to adjust the speed of each of the first and second rotary blood pumps based on a target support level for the patient while maintaining a predetermined ratio between blood flow rate through the second rotary blood pump and blood flow rate through the first rotary blood pump.
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Abstract
In one general aspect, a method includes measuring blood flow through a right rotary blood pump, measuring blood flow through a left rotary blood pump, and controlling a speed of one of the rotary blood pumps using a controller that calculates the speed of one of the rotary blood pumps based on the measured blood flow through the other rotary blood pump.
100 Citations
29 Claims
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1. A blood pump system, comprising:
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a first rotary blood pump configured to be connected to a patient'"'"'s left ventricle to pump blood from the left ventricle to the patient'"'"'s ascending aorta via a first outflow graft; a second rotary blood pump configured to be connected to a patient'"'"'s right ventricle to pump blood from the right ventricle to the patient'"'"'s pulmonary system via a second outflow graft; and a blood pump controller including; an input interface configured to; receive a first signal indicative of blood flow rate through a first rotary blood pump configured to be connected to a patient'"'"'s left ventricle and pump blood from the left ventricle to the patient'"'"'s ascending aorta via a first outflow graft; and receive a second signal indicative of blood flow rate through a second rotary blood pump different from the first rotary blood pump and configured to be connected to the patient'"'"'s right ventricle and pump blood from the right ventricle to the patient'"'"'s pulmonary system via a second outflow graft; and a processing unit configured to generate and transmit separate control signals to the first and second rotary blood pumps to adjust the speed of each of the first and second rotary blood pumps based on a target support level for the patient while maintaining a predetermined ratio between blood flow rate through the second rotary blood pump and blood flow rate through the first rotary blood pump. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of controlling blood flow, comprising:
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operating a first rotary blood pump connected to a patient'"'"'s left ventricle to pump blood from the left ventricle to the patient'"'"'s ascending aorta via a first outflow graft; operating a second rotary blood pump connected to a patient'"'"'s right ventricle to pump blood from the right ventricle to the patient'"'"'s pulmonary system via a second outflow graft; and separately controlling each of the first and second rotary blood pumps via a blood pump controller to provide a target support level for the patient while maintaining a predetermined ratio between blood flow rate through the second rotary blood pump and blood flow rate through the first rotary blood pump. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification