GB2046165A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Shaping Biomaterial
Assignee: Individual
•
Filing: 1979-04-11
•
Granted: —
•
Expires: 1999-04-11
Abstract
Abstract A method of shaping biomaterial in which, during treatment with a chemical treatment fluid, it is constrained by shaping forces, to provide ease and permanence of shaping. In the preferred application a cusped valve (1) of biomaterial mounted on an approximately matching stent (2) is treated with a fixative liquid (17) to fix the biomaterial of the valve (1), the valve (1) being subjected, during the treatment with fluid (17) to forces such as to constrain its biomaterial to remove dimensional inaccuracies in the valve, (e.g. fit of the valve on its stent and/or shape of the valve cusps), preferably while holding the valve in its closed condition. The valve can be a natural valve or one fabricated from biomaterial. The containing forces can be applied hydrostatically or by means of dies, for example. <IMAGE>
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-22 22:09
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412; A61F2/2415
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
38 words
A method of shaping biomaterial, the method comprising treating biomaterial with a chemical treatment fluid, the biomaterial being subjected, during the treatment with chemical treatment fluid, to forces such as to constrain the biomaterial into the required shape.
Claim 2
Independent Claim
38 words
A method of shaping biomaterial, the method comprising treating biomaterial with a chemical treatment fluid, the biomaterial being subjected, during the treatment with chemical treatment fluid, to forces such as to constrain the biomaterial into the required shape.
Claim 3
Dependent Claim
12 words
A method according to claim 1, wherein said biomaterial is animal tissue.
Claim 4
Dependent Claim
22 words
A method, according to claim 1 or claim 2 wherein said chemical treatment fluid is a fixative fluid which fixes said biomaterial.
Claim 5
Dependent Claim
19 words
A method according to claim 3, wherein said
biomaterial is substantially unfixed prior to the
application of said forces.
Claim 6
Dependent Claim
16 words
A method according to claim 3 or claim 4, wherein said fixative fluid is a liquid.
Claim 7
Dependent Claim
12 words
A method according to claim 5, wherein said fixative fluid comprises glutaraldehyde.
Claim 8
Independent Claim
19 words
A method according to any one of claims 1 to 6, wherein said fluid is circulated during said treatment.
Claim 9
Independent Claim
76 words
A method according to any one of claims 1
to 6, the method being a method of making a
stent-mounted replacement cardiac valve, and
comprising providing a cusped valve of
biomaterial mounted on an approximately
matching valve stent, and treating the mounted valve with the chemical treatment fluid, the valve being subjected, during the treatment with said fluid, to forces such as to constrain the biomaterial of the valve to remove dimensional inaccuracies in the valve.
Claim 10
Dependent Claim
21 words
A method according to claim 8, wherein said valve is held in its closed condition during the application of said forces.
Claim 11
Dependent Claim
42 words
A method according to claim 8 or claim 9, wherein said valve is a natural one, and said forces are applied by arranging that there is pressure drop in said fluid across the valve from its outlet side to its inlet side.
Claim 12
Dependent Claim
18 words
A method according to claim 10, wherein said pressure drop is between 5 and 200 mm of
Hg.
Claim 13
Dependent Claim
18 words
A method according to claim 11, wherein said pressure drop is between 80 and 120 mm of
Hg.
Claim 14
Dependent Claim
54 words
A method according to claim 8 or claim 9 wherein said cusped valve is formed of a piece of biomaterial mounted about the periphery of a suitably shaped stent so that the peripheral portions of the biomaterial at the outlet end of thevalve can come together to form the closure cusps of the valve.
Claim 15
Dependent Claim
12 words
A method according to claim 13, wherein said biomaterial is animal tissue.
Claim 16
Dependent Claim
12 words
A method according to claim 14, wherein said animal tissue is skin.
Claim 17
Dependent Claim
12 words
A method according to claim 14, wherein said animal tissue is pericardium.
Claim 18
Independent Claim
34 words
A method according to any one of claims 13 to 16, wherein said forces are applied by arranging that said cusped valve is sandwiched, in its closed condition, between a pair of complementary dies.
Claim 19
Independent Claim
25 words
A method according to any one of claims 13 to 16, wherein said forces are applied by holding said cusped valve against a mould surface.
Claim 20
Dependent Claim
25 words
A method according to claim 18, wherein said cusped valve is held against said mould surface by withdrawing the ambient fluid through the mould surface.
Claim 21
Independent Claim
27 words
A method of making a stent-mounted replacement cardiac valve, the method being substantially as hereinbefore described with reference to Figures 1 and 2 of the accompanying drawings.
Claim 22
Independent Claim
27 words
A method of making a stent-mounted replacement cardiac valve, the method being substantially as hereinbefore described with reference to Figures 1 and 2 of the accompanying drawings.
Claim 23
Independent Claim
25 words
A method of making a stent-mounted replacement cardiac valve, the method being substantially as hereinbefore described with reference to Figure 3 of the accompanying drawings.
Claim 24
Independent Claim
25 words
A method of making a stent-mounted replacement cardiac valve, the method being substantially as hereinbefore described with reference to Figure 3 of the accompanying drawings.
Claim 25
Dependent Claim
19 words
A stent-mounted replacement cardiac valve whenever made by a method according to any one of claims 1 to 21.
Claim 26
Dependent Claim
7 words
Each and every novel invention hereinbefore disclosed.
Claim 27
Dependent Claim
7 words
Each and every novel invention hereinbefore disclosed.
References Cited (Backward Citations)
No citation records indexed.
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