US4759764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peripheral nerve regeneration
Assignee: Research Development Foundation
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Filing: 1987-07-28
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Granted: 1988-07-26
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Expires: 2007-07-28
Abstract
Abstract Basal lamina grafts for reconnecting severed nerves are prepared from muscle by removing cellular material therefrom while preserving the tubular structure of the basal lamina. When connected to nerve stumps the basal lamina surfaces promote axon regeneration therethrough, eventually reestablishing nerve function through the regenerated graft.
Inventors
- 👤 James W. Fawcett
- 👤 Roger J. Keynes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:19
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/11; A61B17/1128
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
91 words
A method for restoring nerve function of a severed peripheral nerve in a mammal of a first species which comprises joining the proximal stump of said severed nerve to a distal stump of said severed nerve by attaching to said stumps a graft, said graft comprising muscle basal lamina tubes from a mammal of a second species, which is the same as or different from said first species, the cellular material being substantially removed from said basal lamina tubes, and said basal lamina tubes extending longitudinally, substantially colinear with said stumps.
Claim 2
Independent Claim
91 words
A method for restoring nerve function of a severed peripheral nerve in a mammal of a first species which comprises joining the proximal stump of said severed nerve to a distal stump of said severed nerve by attaching to said stumps a graft, said graft comprising muscle basal lamina tubes from a mammal of a second species, which is the same as or different from said first species, the cellular material being substantially removed from said basal lamina tubes, and said basal lamina tubes extending longitudinally, substantially colinear with said stumps.
Claim 3
Dependent Claim
57 words
A method according to claim 1 wherein the graft is prepared by a process which comprises subjecting muscle tissue from a mammal to a medium or media which loosen cellular material from the basal lamina in the basal lamina tubes of the tissue and mechanically and/or osmotically forcing the loosened cellular material from the basal lamina tubes.
Claim 4
Dependent Claim
47 words
A method according to claim 1 wherein the graft is prepared by a process which comprises subjecting muscle tissue from a mammal to a repetitive freezing and thawing and, after said freezing and thawing, mechanically and/or osmotically forcing the loosened cellular material from the basal lamina tubes.
Claim 5
Dependent Claim
14 words
A method of claim 2 wherein the first species and second species are human.
Claim 6
Dependent Claim
14 words
A method of claim 3 wherein the first species and second species are human.
References Cited (Backward Citations)
US3551560A
Cited
US4662884A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-26 | 1992-01-25 | 1992-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-26 | 1996-01-25 | 1996-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-26 | 2000-01-25 | 2000-07-26 | $7700.00 | Window Closed / Lapsed |