US6508756B1
Expired / Lapsed
US
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Passive cardiac assistance device
Assignee: Abiomed Inc
•
Filing: 1998-12-30
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Granted: 2003-01-21
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Expires: 2018-12-30
Abstract
Abstract Artificial implantable active and passive girdles include a heart assist system with an artificial myocardium employing a number of flexible, non-distensible tubes with the walls along their long axes connected in series to form a cuff and a passive girdle is wrapped around a heart muscle which has dilatation of a ventricle to conform to the size and shape of the heart and to constrain the dilatation during diastole. The passive girdle is formed of a material and structure that does not expand away from the heart but may, over an extended period of time be decreased in size as dilatation decreases.
Inventors
- 👤 Robert T. V. Kung
- 👤 David M. Lederman
- 👤 Meir Rosenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:40
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2478; A61F2/2481; A61M; A61M60/00; A61M60/10; A61M60/122; A61M60/165; A61M60/191; A61M60/20; A61M60/289; A61M60/40; A61M60/465; A61M60/468; A61M60/50; A61M60/508; A61M60/515; A61M60/562; A61M60/569; A61M60/80; A61M60/855; A61M60/865; A61M60/869; A61F2/0063; A61F2002/0068; A61M2205/00; A61M2205/33; A61M2205/3303; Y; Y10; Y10S; Y10S623/00; Y10S623/902; Y10S623/904
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
52 words
A passive cardiac device, said device comprising: a biomedical material that is sized to be applied to a epicardial surface of the heart and which is passive and capable of expanding to a predetermined size after disposition about the heart, said predetermined size selected to constrain cardiac expansion beyond a predetermined limit.
Claim 2
Dependent Claim
52 words
A passive cardiac device, said device comprising: a biomedical material that is sized to be applied to a epicardial surface of the heart and which is passive and capable of expanding to a predetermined size after disposition about the heart, said predetermined size selected to constrain cardiac expansion beyond a predetermined limit.
Claim 3
Dependent Claim
19 words
The cardiac device according to claim 1 wherein said biomedical material is sized to locally constrain ventricular cardiac expansion.
Claim 4
Dependent Claim
35 words
The cardiac device according to claim 1 wherein said biomedical material is a jacket with said predetermined size selected for said jacket to surround the epicardial surface of the heart and circumferentially constrain cardiac expansion.
Claim 5
Dependent Claim
23 words
The cardiac device according to claim 3 further comprising at least one inflatable member for selectively adjusting said predetermined size of said jacket.
Claim 6
Dependent Claim
47 words
The cardiac device according to claim 4 , wherein said at least one inflatable member is formed of an elongated segment having a longitudinal axis adapted to be substantially aligned with a major axis of the heart extending from the top of the heart to the apex.
Claim 7
Dependent Claim
29 words
The cardiac device according to claim 5 , wherein said at least one inflatable member comprises a plurality of generally parallel elongated segments adapted to converge toward the apex.
Claim 8
Dependent Claim
17 words
The cardiac device according to claim 1 further comprising a mechanism for selectively adjusting said predetermined size.
Claim 9
Dependent Claim
22 words
The cardiac device of claim 7 , wherein said mechanism comprises a lateral attachment device for circumferential adjustment of said cardiac device.
Claim 10
Dependent Claim
15 words
The cardiac device according to claim 1 wherein said biomedical material comprises an open mesh.
Claim 11
Dependent Claim
32 words
The cardiac device according to claim 1 wherein said biomedical material is a synthetic material that can limit tension but is otherwise deformable to conform to the anatomical geometry of the heart.
Claim 12
Dependent Claim
25 words
The cardiac device according to claim 1 wherein the biomedical material comprises a confining net structure that provides a sustained dimensional constraint on the heart.
Claim 13
Dependent Claim
34 words
The cardiac device according to claim 1 wherein the biomedical material comprises a mesh and the device further includes at least one adjustment string for adjusting the mesh to set a desired inner perimeter.
Claim 14
Dependent Claim
18 words
The cardiac device according to claim 1 wherein the biomedical material comprises an interlinked open loop mesh structure.
Claim 15
Dependent Claim
28 words
The cardiac device according to claim 1 wherein the biomedical material comprises a mesh which limits the maximum diastolic dimension of the heart without resistance to systolic ejection.
Claim 16
Dependent Claim
19 words
The cardiac device according to claim 1 wherein the biomedical material comprises a two-dimensional net formed by interconnected rings.
Claim 17
Dependent Claim
83 words
A passive cardiac device for constraining cardiac size during diastole, said device comprising: a biomedical material for contacting an epicardial surface of a patient's heart which is configured to circumferentially surround said epicardial surface of said patient's heart and is passive but capable of limited expansion; configured biomedical material having a base end and an apical end; and said configured biomedical material providing cardiac constraint beyond a defined limit after disposition about the heart during diastole without substantially assisting cardiac contraction during systole.
Claim 18
Dependent Claim
83 words
A passive cardiac device for constraining cardiac size during diastole, said device comprising: a biomedical material for contacting an epicardial surface of a patient's heart which is configured to circumferentially surround said epicardial surface of said patient's heart and is passive but capable of limited expansion; configured biomedical material having a base end and an apical end; and said configured biomedical material providing cardiac constraint beyond a defined limit after disposition about the heart during diastole without substantially assisting cardiac contraction during systole.
Claim 19
Dependent Claim
25 words
The cardiac device according to claim 16 wherein the biomedical material comprises a confining net structure that provides a sustained dimensional constraint on the heart.
Claim 20
Dependent Claim
34 words
The cardiac device according to claim 16 wherein the biomedical material comprises a mesh and the device further includes at least one adjustment string for adjusting the mesh to set a desired inner perimeter.
Claim 21
Dependent Claim
18 words
The cardiac device according to claim 16 wherein the biomedical material comprises an interlinked open loop mesh structure.
Claim 22
Dependent Claim
28 words
The cardiac device according to claim 16 wherein the biomedical material comprises a mesh which limits the maximum diastolic dimension of the heart without resistance to systolic ejection.
Claim 23
Dependent Claim
19 words
The cardiac device according to claim 16 wherein the biomedical material comprises a two-dimensional net formed by interconnected rings.
Claim 24
Dependent Claim
39 words
The cardiac device according to claim 16 wherein the biomedical material comprises a jacket with a predetermined size such that jacket can surround at least a portion of the epicardial surface of the heart and circumferentially constrain cardiac expansion.
Claim 25
Dependent Claim
23 words
The cardiac device according to claim 22 further comprising at least one inflatable member for selectively adjusting the predetermined size of the jacket.
Claim 26
Dependent Claim
47 words
The cardiac device according to claim 23 wherein the at least one inflatable member comprises an elongated segment having a longitudinal axis adapted to be substantially aligned with a major axis of the heart, the elongated segment extending from the top of the heart to the apex.
Claim 27
Dependent Claim
25 words
The cardiac device according to claim 23 wherein the at least one inflatable member comprises a plurality of elongate segments which converge towards the axis.
Claim 28
Dependent Claim
20 words
The cardiac device according to claim 23 wherein the device further comprises a mechanism for selectively adjusting said determined size.
Claim 29
Dependent Claim
23 words
The cardiac device according to claim 23 wherein the device further comprises at least one sensor for sensing tension in the jacket material.
Claim 30
Dependent Claim
33 words
The cardiac device according to claim 16 wherein the biomedical material further comprises a synthetic material that can limit tension but is otherwise deformable to conform to the anatomical geometry of the heart.
Claim 31
Independent Claim
83 words
A method for cardiac treatment, said method comprising: selecting a cardiac device, said cardiac device being passive and comprising a biomedical material that is sized to be applied to the epicardial surface of a heart, said cardiac device expanding to a predetermined size after disposition about the heart, said predetermined size selected to constrain cardiac expansion beyond a predetermined limit; applying said cardiac device to the epicardial surface of the heart; and securing said cardiac device to said epicardial surface of the heart.
Claim 32
Independent Claim
83 words
A method for cardiac treatment, said method comprising: selecting a cardiac device, said cardiac device being passive and comprising a biomedical material that is sized to be applied to the epicardial surface of a heart, said cardiac device expanding to a predetermined size after disposition about the heart, said predetermined size selected to constrain cardiac expansion beyond a predetermined limit; applying said cardiac device to the epicardial surface of the heart; and securing said cardiac device to said epicardial surface of the heart.
Claim 33
Dependent Claim
19 words
The method according to claim 29 wherein said cardiac device is further arranged to locally constrain said cardiac expansion.
Claim 34
Dependent Claim
34 words
The method according to claim 29 wherein said cardiac device comprises a jacket with said predetermined size selected for said jacket to surround the epicardial surface of the heart and circumferentially constrain cardiac expansion.
Claim 35
Dependent Claim
22 words
The method according to claim 29 , further comprising the step of periodically adjusting said predetermined size as cardiac dilatation is reduced.
Claim 36
Dependent Claim
20 words
The method according to claim 29 , wherein said cardiac device comprises a mechanism for selectively adjusting said predetermined size.
Claim 37
Dependent Claim
26 words
The method according to claim 33 , wherein said mechanism comprises at least one inflatable member for selectively adjusting said predetermined size of said cardiac device.
Claim 38
Dependent Claim
23 words
The method according to claim 33 , wherein said mechanism comprises a lateral attachment device for selective circumferential adjustment of said cardiac device.
Claim 39
Dependent Claim
27 words
The method according to claim 33 , wherein said mechanism comprises at least one inflatable member for selectively periodically adjusting said predetermined size of said cardiac device.
Claim 40
Dependent Claim
24 words
The cardiac device of claim 33 , wherein said mechanism comprises a lateral attachment device for selective, periodic circumferential adjustment of said cardiac device.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-01-20 | 2006-07-22 | 2007-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-01-20 | 2010-07-22 | 2011-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-01-20 | 2014-07-22 | 2015-01-21 | $7700.00 | Window Closed / Lapsed |