Patent US4790844A successfully refreshed from Google Patents.
US4790844A
Expired / Lapsed
US
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Replacement of cardiac valves in heart surgery
Assignee: Individual
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Filing: 1987-01-30
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Granted: 1988-12-13
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Expires: 2007-01-30
Abstract
Abstract A cardiac valve has an annular body of unsupported natural or artificial tissue. The annular body has a bishop's miter shape with a cylindrical end and a pair of diametrically-opposite triangular flap portions extending therefrom. Each flap portion has a free apical end.
Inventors
- 👤 Yoel Ovil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:12
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
54 words
A cardiac valve having an annular body of flexible unsupported natural or artifical tissue, said annular body having a bishop's miter shape with a cylindrical end portion and a pair of diametrically-opposite triangular flexible flap portions integral with and extending from the cylindrical end portion, each flexible flap portion having a free apical end.
Claim 2
Dependent Claim
54 words
A cardiac valve having an annular body of flexible unsupported natural or artifical tissue, said annular body having a bishop's miter shape with a cylindrical end portion and a pair of diametrically-opposite triangular flexible flap portions integral with and extending from the cylindrical end portion, each flexible flap portion having a free apical end.
Claim 3
Dependent Claim
15 words
A cardiac valve according to claim 1 wherein the annular body is of animal pericardium.
Claim 4
Dependent Claim
15 words
A cardiac valve according to claim 2 wherein the pericardium is bovine or pig pericardium.
Claim 5
Independent Claim
110 words
A method of replacing a cardiac valve in a heart of a patient; the method comprising providing a tissue valve consisting of flexible unsupported natural or artifical tissue having a bishop's miter shape with a cylindrical end portion and a pair of diametrically-opposite triangular flexible flap portions integral with and extending from the cylindrical end portion, each flexible flap portion having a free apical end; securing the cylindrical end of the tissue valve being secured to a native annulus in the heart, and securing the apical end of each flexible flap portion to papillary muscle of a ventricle or to a side wall of the pulmonary artery or the aorta.
Claim 6
Independent Claim
110 words
A method of replacing a cardiac valve in a heart of a patient; the method comprising providing a tissue valve consisting of flexible unsupported natural or artifical tissue having a bishop's miter shape with a cylindrical end portion and a pair of diametrically-opposite triangular flexible flap portions integral with and extending from the cylindrical end portion, each flexible flap portion having a free apical end; securing the cylindrical end of the tissue valve being secured to a native annulus in the heart, and securing the apical end of each flexible flap portion to papillary muscle of a ventricle or to a side wall of the pulmonary artery or the aorta.
Claim 7
Dependent Claim
71 words
A method according to claim 4 including securing the apical end of each flap portion to said papillary muscle or side wall by temporarily securing opposite side edges of an upper part of the flap portion to the native annulus at diametrically-opposite positions, securing the apical end of the flap portion to said papillary muscle or side wall, and releasing the upper part of the flap portion from the native annulus.
Claim 8
Dependent Claim
81 words
A method according to claim 4 including providing the tissue valve by excising a rectangular portion of tissue from the pericardium of the patient, said rectangular portion having opposite edges, securing the opposite edges together to form a cylinder with a cylindrical end and an opposite end, and removing a pair of diametrically-opposite triangular portions from the opposite end of the tissue cylinder to form said pair of diametrically-opposite triangular flap portions, and securing said cylindrical end to the native annulus.
Claim 9
Independent Claim
89 words
A method of replacing a cardiac valve in a heart of a patient; the method comprising providing a tissue valve consisting of flexible unsupported endocardial tissue having a bishop's miter shape with a cylindrical end portion and a pair of diametrically-opposite triangular flexible flap portions integral with and extending from the cylindrical end portion, each flexible flap portion having a free end, and securing the apical ends of each flap portion to papillary muscle of a ventricle or to a side wall of the pulmonary artery or the aorta.
Claim 10
Independent Claim
89 words
A method of replacing a cardiac valve in a heart of a patient; the method comprising providing a tissue valve consisting of flexible unsupported endocardial tissue having a bishop's miter shape with a cylindrical end portion and a pair of diametrically-opposite triangular flexible flap portions integral with and extending from the cylindrical end portion, each flexible flap portion having a free end, and securing the apical ends of each flap portion to papillary muscle of a ventricle or to a side wall of the pulmonary artery or the aorta.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-13 | 1992-06-13 | 1992-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-13 | 1996-06-13 | 1996-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-13 | 2000-06-13 | 2000-12-13 | $7700.00 | Window Closed / Lapsed |