Patent EP0209070A2 successfully refreshed from Google Patents.
EP0209070A2
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EP
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High frequency intra-arterial cardiac support system
Assignee: Abiomed Inc
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Filing: 1986-07-09
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Granted: —
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Expires: 2006-07-09
Abstract
Abstract Disclosed is a high-frequency intra-arterial cardiac support system having a balloon pump (20) which may be positioned in a major artery downstream of a natural heart. The balloon pump comprises a pumping balloon (14), of small displacement, mounted upon and cyclically inflatable and deflatable by fluid flow through catheter (16) having a lumen leading to the outside of the body. The balloon pump further comprises a valve (15) mounted downstream of said pumping balloon. The system further comprises a control and drive mechanism (18) for providing cyclical fluid flow to said lumen of said catheter for inflation and deflation of said pumping balloon. The cyclical flow and the cyclical inflation and deflation occur at a frequency which is at least three times the normal beating frequency of the natural heart. The small displacement of the pumping balloon is much smaller than the normal stroke volume of the natural heart.
Inventors
- 👤 Param I. Singh
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 12:31
CPC Classifications
A; A61; A61M; A61M60/00; A61M60/50; A61M60/508; A61M60/577; A61M60/10; A61M60/122; A61M60/126; A61M60/13; A61M60/135; A61M60/139; A61M60/20; A61M60/295; A61M60/40; A61M60/497; A61M60/80; A61M60/841; A61M60/843; A61M60/148; A61M60/205; A61M60/211; A61M60/247; A61M60/253; A61M60/268; A61M60/274; A61M60/802; A61M60/833
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
150 words
A high-frequency intra-arterial cardiac support system comprising a balloon pump which may be positioned in a major artery downstream of a natural heart, said balloon pump comprising a pumping balloon, of small displacement, mounted upon and cyclically inflatable and deflatable by fluid flow through catheter having a lumen leading to the outside of the body and said balloon pump further comprising a valve mounted downstream of said pumping balloon, said system further comprising a control and drive mechanism for providing cyclical fluid flow to said lumen of said catheter for inflation and deflation of said pumping balloon, said system being further characterized by: said cyclical flow and said cyclical inflation and deflation occurring at a frequency which is at least three times the normal beating frequency of the natural heart; and said small displacement of said pumping balloon being much smaller than the normal stroke volume of the natural heart.
Claim 2
Dependent Claim
150 words
A high-frequency intra-arterial cardiac support system comprising a balloon pump which may be positioned in a major artery downstream of a natural heart, said balloon pump comprising a pumping balloon, of small displacement, mounted upon and cyclically inflatable and deflatable by fluid flow through catheter having a lumen leading to the outside of the body and said balloon pump further comprising a valve mounted downstream of said pumping balloon, said system further comprising a control and drive mechanism for providing cyclical fluid flow to said lumen of said catheter for inflation and deflation of said pumping balloon, said system being further characterized by: said cyclical flow and said cyclical inflation and deflation occurring at a frequency which is at least three times the normal beating frequency of the natural heart; and said small displacement of said pumping balloon being much smaller than the normal stroke volume of the natural heart.
Claim 3
Dependent Claim
60 words
A high-frequency intra-arterial cardiac support system according to claim 1 operable in burst mode wherein said cyclical fluid flow occurs mostly during systole of the natural heart said cyclical flow and said cyclical inflation and deflation occurring at a frequency which is at least three times the normal beating frequency of the natural heart, divided by the systolic duty cycle.
Claim 4
Dependent Claim
20 words
A high-frequency intra-arterial cardiac support system according to claim 1 in which said fluid flow is flow of a gas.
Claim 5
Dependent Claim
25 words
A high-frequency intra-arterial cardiac support system according to claim 1 in which said balloon pump comprises a further valve mounted upstream of said pumping balloon.
Claim 6
Dependent Claim
45 words
A high-frequency intra-arterial cardiac support system according to claim 1 in which said valve is a collapsible one-way check valve directing blood flow away from the natural heart, and .the diameter of said valve, when erected, is just sufficient to substantially occlude said major artery.
Claim 7
Dependent Claim
89 words
A high-frequency intra-arterial cardiac support system according to claim 1 in which said catheter has a further lumen, said valve is a small balloon of inflated diameter just sufficient to substantially occlude said major artery and erectable and collapsible by inflation and deflation through said further lumen, and said control and drive mechanism provides a further cyclical fluid flow to said further lumen to operate said valve by cyclical inflation and deflation in suitable phase with said pumping balloon to cause pumping of blood away from the natural heart.
Claim 8
Dependent Claim
36 words
A high-frequency intra-arterial cardiac support system according to claim 6 and configured for support to the left heart by a balloon pump positioned in the ascending aorta, in which occasional deflations of said valve are omitted.
Claim 9
Dependent Claim
45 words
A high-frequency intra-arterial cardiac support system according to claim 7, operable in burst mode with said cyclical fluid flows occurring mostly during systole of the natural heart, in which said omitted deflations of said valve occur near the beginning of diastole of the natural heart.
Claim 10
Dependent Claim
106 words
For use in a high-frequency intra-arterial cardiac support system, a balloon pump, for positioning in a major artery downstream of a natural heart and comprising an erectable valve contiguous to the downstream side of a pumping balloon mounted upon a catheter leading to the outside of the body, said pumping balloon being cyclically inflated and deflated through a lumen of said catheter at a frequency at least three times the normal beating frequency of the natural heart, said valve having an erected diameter just sufficient to substantially occlude said major artery, and said pumping balloon having an inflated diameter which is less than said erected diameter.
Claim 11
Dependent Claim
106 words
For use in a high-frequency intra-arterial cardiac support system, a balloon pump, for positioning in a major artery downstream of a natural heart and comprising an erectable valve contiguous to the downstream side of a pumping balloon mounted upon a catheter leading to the outside of the body, said pumping balloon being cyclically inflated and deflated through a lumen of said catheter at a frequency at least three times the normal beating frequency of the natural heart, said valve having an erected diameter just sufficient to substantially occlude said major artery, and said pumping balloon having an inflated diameter which is less than said erected diameter.
Claim 12
Dependent Claim
90 words
A balloon pump according to claim 9, for providing support to the left heart and for positioning in the ascending aorta between the aortic valve and the ostium of the innominate artery, wherein said pumping balloon is mounted at the end of said catheter and coaxial therewith, said valve is mounted contiguous to said pumping balloon upon said catheter and coaxial therewith, and the total length of said pumping balloon and said valve, parallel to said catheter, is not greater than the distance between said aortic valve and said ostium.
Claim 13
Dependent Claim
75 words
A balloon pump according to claim 9, for providing support to the right heart and for positioning in the pulmonary trunk, wherein said valve is mounted upon the end of said catheter and coaxial therewith, said pumping balloon is mounted contiguous to said valve upon said catheter and coaxial therewith, and the total length of said valve and said pumping balloon, parallel to said catheter, is not greater that the length of said pulmonary trunk.
References Cited (Backward Citations)
No citation records indexed.
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