US20060030747A1
Expired / Lapsed
US
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Synchronization system between aortic valve and cardiac assist device
Assignee: Individual
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Filing: 2005-07-11
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Granted: —
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Expires: 2025-07-11
Abstract
Abstract A cardiac assist device synchronization system includes a cardiac assist device and an acoustic or accelerometer sensor that provides a signal input to the cardiac assist device indicative of aortic valve closure. The cardiac assist device is coupled to a mammalian aorta and includes an inflatable chamber and a fluid pump. A fluid conduit is in communication between the chamber and the pump to provide for selective inflation of the chamber. A pump controller triggers the pump in counter-pulsation to a mammalian heart upstream from the aorta. A process for synchronizing a cardiac assist device in counter-pulsation with a left ventricle includes locating an acoustic or accelerometer sensor within a thoracic cavity of a mammal having the assist device coupled to the aorta of the mammal. Through the measurement of an acoustic or acceleration property of an aortic valve of the mammal, and the transmission of aortic valve closure measurement through a controller for the cardiac assist device, counter-pulsatile synchronization for the cardiac assist device is achieved.
Inventors
- 👤 Allen Kantrowitz
- 👤 Adrian Kantrowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:16
CPC Classifications
A; A61; A61M; A61M60/00; A61M60/10; A61M60/122; A61M60/126; A61M60/148; A61M60/165; A61M60/178; A61M60/40; A61M60/424; A61M60/427; A61M60/50; A61M60/508; A61M60/515; A61M60/538; A61M60/80; A61M60/855; A61M60/857; A61M2205/00; A61M2205/33; A61M2205/3303; A61M60/20; A61M60/247; A61M60/253; A61M60/268
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
91 words
1 . A cardiac assist device synchronization system comprising: a cardiac assist device coupled to a mammal having a thoracic cavity containing a mammalian heart having an aorta and an aortic valve comprising: an inflatable chamber; a fluid pump; a fluid conduit in fluid communication between said chamber and said pump; and a pump controller triggering said pump in counter-pulsation to a mammalian heart; and a sensor selected from the group consisting of: acoustic and accelerometer, said sensor providing a signal input to said controller indicating closure of the aortic valve.
Claim 2
Dependent Claim
91 words
1 . A cardiac assist device synchronization system comprising: a cardiac assist device coupled to a mammal having a thoracic cavity containing a mammalian heart having an aorta and an aortic valve comprising: an inflatable chamber; a fluid pump; a fluid conduit in fluid communication between said chamber and said pump; and a pump controller triggering said pump in counter-pulsation to a mammalian heart; and a sensor selected from the group consisting of: acoustic and accelerometer, said sensor providing a signal input to said controller indicating closure of the aortic valve.
Claim 3
Dependent Claim
18 words
2 . The system of claim 1 wherein said cardiac assist device is a left ventricular assist device.
Claim 4
Dependent Claim
29 words
3 . The system of claim 2 wherein said left ventricular assist device is selected from a group consisting of: cuff type, intra-aortic balloon, aortic patch, and aortic conduit.
Claim 5
Dependent Claim
13 words
4 . The system of claim 1 wherein said sensor is a microphone.
Claim 6
Dependent Claim
16 words
5 . The system of claim 1 wherein said sensor is an ultrasonic transducer and receiver.
Claim 7
Dependent Claim
14 words
6 . The system of claim 1 wherein said sensor is a Doppler sensor.
Claim 8
Dependent Claim
13 words
7 . The system of claim 1 wherein said sensor is an accelerometer.
Claim 9
Dependent Claim
16 words
8 . The system of claim 1 wherein said sensor is located within said fluid conduit.
Claim 10
Dependent Claim
18 words
9 . The system of claim 1 wherein said sensor is located within said cardiac ventricular assist device.
Claim 11
Dependent Claim
21 words
10 . The system of claim 1 wherein said sensor is implanted in the thoracic cavity proximal to the aortic valve.
Claim 12
Dependent Claim
35 words
11 . The system of claim 9 wherein said sensor is affixed within the thoracic cavity independent of cardiac assist device components selected from the group consisting of said inflatable chamber and said fluid conduit.
Claim 13
Dependent Claim
25 words
12 . The system of claim 9 wherein said sensor is affixed directly to an aortic wall of the aorta proximic to the aortic valve.
Claim 14
Dependent Claim
27 words
13 . The system of claim 11 wherein said sensor is affixed with a suture, tissue adhesive or other method of securing said sensor to the aorta.
Claim 15
Dependent Claim
71 words
14 . A process for synchronizing a cardiac assist device in counter-pulsation with a left ventricle comprising: locating a sensor selected from the group consisting of: acoustic and accelerometer within a thoracic cavity of a mammal having a cardiac assist device coupled to an aorta therein; measuring an acoustic or acceleration property of an aortic valve; and transmitting the aortic valve closure measurement to a controller for said cardiac assist device.
Claim 16
Dependent Claim
71 words
14 . A process for synchronizing a cardiac assist device in counter-pulsation with a left ventricle comprising: locating a sensor selected from the group consisting of: acoustic and accelerometer within a thoracic cavity of a mammal having a cardiac assist device coupled to an aorta therein; measuring an acoustic or acceleration property of an aortic valve; and transmitting the aortic valve closure measurement to a controller for said cardiac assist device.
Claim 17
Dependent Claim
22 words
15 . The process of claim 13 further comprising the step of implanting said sensor within the thoracic cavity by surgical technique.
Claim 18
Dependent Claim
13 words
16 . The process of claim 14 wherein said sensor is implanted endoscopically.
Claim 19
Dependent Claim
13 words
17 . The process of claim 13 wherein said sensor is a microphone.
Claim 20
Dependent Claim
30 words
18 . An improved method of triggering counter-pulsation in a left ventricular assist device coupled to a mammalian heart wherein the improvement lies in acoustic measurement of aortic valve closure.
Claim 21
Dependent Claim
30 words
18 . An improved method of triggering counter-pulsation in a left ventricular assist device coupled to a mammalian heart wherein the improvement lies in acoustic measurement of aortic valve closure.
Claim 22
Dependent Claim
21 words
19 . The improved method of claim 17 comprising the further improvement of: measuring aortic valve closure independent of blood pressure.
Claim 23
Dependent Claim
29 words
20 . A kit for improving cardiac function comprising: a cardiac assist device synchronization system according to claim 1 along with instructions for the surgical implantation and operation thereof.
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