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US5865723A
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Method and apparatus for forming vascular prostheses
Assignee: Ramus Medical Technology
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Filing: 1995-12-29
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Granted: 1999-02-02
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Expires: 2015-12-29
Abstract
Abstract A vascular prosthesis comprises pericardial, fascial, or other tissue formed over a tubular support frame. A first exemplary tubular support frame comprises an inner helical member and an outer helical member, where the tissue is rolled and captured therebetween. A second exemplary tubular support frame comprises a plurality of ring elements which are located alternately on the outside and on the inside of the rolled tissue. Other exemplary frames employ fasteners for penetrating the rolled tissue and attaching tissue to frame elements. The tissue is preferably obtained from the patient who is to receive the vascular prosthesis, with the tissue being mounted over the frame immediately prior to use.
Inventors
- 👤 Charles S. Love
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:05
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/36; A61L27/3683; A61L27/3687; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61F2/07; A61F2/82; A61F2/86; A61F2/88; A61L27/3604; A61F2/0077; A61F2/848; A61F2/852; A61F2002/072; A61F2002/075; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30062; A61F2002/30316; A61F2002/30329; A61F2210/00; A61F2210/0004; A61F2220/00; A61F2220/0008; A61F2220/0016; A61F2220/0025; A61F2220/005; A61F2220/0058; A61F2220/0066; A61F2220/0075; A61F2230/00; A61F2230/0002; A61F2230/0017; A61F2240/00; A61F2240/001; A61F2250/00; A61F2250/0058; A61F2250/006; A61F2250/0063; Y; Y10; Y10S; Y10S623/00; Y10S623/901
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
86 words
A method for forming a tubular prosthesis, said method comprising: providing a sheet of biological tissue; providing a flexible tubular support frame wherein the tubular support frame includes at least an inner frame component and an outer frame component; and attaching the tissue to the tubular support frame, wherein the frame captures the sheet of biological tissue between the inner frame component and the outer component to hold the tissue in a tubular geometry having ends suitable for anastomotic attachment with a substantially unrestricted lumen therethrough.
Claim 2
Independent Claim
86 words
A method for forming a tubular prosthesis, said method comprising: providing a sheet of biological tissue; providing a flexible tubular support frame wherein the tubular support frame includes at least an inner frame component and an outer frame component; and attaching the tissue to the tubular support frame, wherein the frame captures the sheet of biological tissue between the inner frame component and the outer component to hold the tissue in a tubular geometry having ends suitable for anastomotic attachment with a substantially unrestricted lumen therethrough.
Claim 3
Dependent Claim
32 words
A method as in claim 1, wherein the sheet providing step comprises: harvesting tissue from an animal host; and trimming the tissue into a shape selected to permit attachment to the frame.
Claim 4
Dependent Claim
15 words
A method as in claim 2, wherein the tissue is trimmed into a rectangular shape.
Claim 5
Dependent Claim
23 words
A method as in claim 1, wherein the tissue is selected from the group consisting of pericardium, fascia, rectus sheath, and venous tissue.
Claim 6
Dependent Claim
15 words
A method as in claim 1, further comprising treating the tissue with a cross-linking agent.
Claim 7
Dependent Claim
23 words
A method as in claim 5, wherein the tissue is treated by immersion in glutaraldehyde prior to attaching to the tubular support frame.
Claim 8
Dependent Claim
14 words
A method as in claim 1, further comprising implanting the prosthesis in a host.
Claim 9
Dependent Claim
21 words
A method as in claim 7, wherein the tissue was obtained from the same host into which the prosthesis is implanted.
Claim 10
Dependent Claim
24 words
A method as in claim 7, wherein the tissue was obtained from a host other than the host into which the prosthesis is implanted.
Claim 11
Dependent Claim
23 words
A method as in claim 1, wherein the tissue sheet is disposed on the frame with parallel edges overlapping along a longitudinal line.
Claim 12
Dependent Claim
17 words
A method as in claim 10, wherein the edges are not connected other than by the frame.
Claim 13
Dependent Claim
17 words
A method as in claim 11, wherein the edges overlap by an arc of at least 30°.
Claim 14
Dependent Claim
22 words
A method as in claim 1, further comprising forming the tissue over a mandrel prior to attaching the tissue to the frame.
Claim 15
Dependent Claim
43 words
A method as in claim 1, wherein the inner frame component and the outer frame component each comprise a helix, wherein the capturing step comprises aligning the inner helix and the outer helix so that the turns of each helix run in parallel.
Claim 16
Dependent Claim
23 words
A method as in claim 14, wherein the helical turns are positioned to be evenly spaced from each other in the longitudinal direction.
Claim 17
Dependent Claim
43 words
A method as in claim 1, wherein the inner frame component and outer frame component each comprise a plurality of longitudinally spaced-apart ring elements, wherein the capturing step comprises aligning the inner and outer rings in a selected pattern relative to each other.
Claim 18
Dependent Claim
18 words
A method as in claim 16, wherein the inner and outer rings are aligned in an alternating pattern.
Claim 19
Dependent Claim
19 words
A method as in claim 16, wherein the inner and outer rings are aligned to lie over each other.
Claim 20
Dependent Claim
30 words
A method as in claim 1, wherein the tubular support frame includes a plurality of fasteners disposed thereover and wherein the attaching step comprises attaching the tissue to said fasteners.
Claim 21
Dependent Claim
19 words
A method as in claim 19, wherein the fasteners are disposed over an inner luminal surface of the frame.
Claim 22
Dependent Claim
17 words
A method, as in claim 20, wherein the attaching step comprises penetrating the fasteners through the tissue.
Claim 23
Dependent Claim
17 words
A method as in claim 1, wherein the attaching step comprises stapling the tissue to the frame.
Claim 24
Dependent Claim
33 words
A method as in claim 1, wherein the outer frame component comprises a sleeve, wherein the attaching step comprises disposing the sleeve over the tissue which is disposed over the inner frame component.
Claim 25
Independent Claim
100 words
A method for forming a tubular prosthesis, said method comprising: providing a sheet of biological tissue; providing a flexible tubular support frame including an inner frame component and an outer frame component; and capturing the tissue between the inner frame component and the outer frame component of the tubular support frame, wherein the frame holds the tissue in a tubular geometry with a substantially unrestricted lumen therethrough and wherein at least one of the frame components is in the form of a helix which extends continuously from a proximal end of the prosthesis to a distal end of the prosthesis.
Claim 26
Independent Claim
100 words
A method for forming a tubular prosthesis, said method comprising: providing a sheet of biological tissue; providing a flexible tubular support frame including an inner frame component and an outer frame component; and capturing the tissue between the inner frame component and the outer frame component of the tubular support frame, wherein the frame holds the tissue in a tubular geometry with a substantially unrestricted lumen therethrough and wherein at least one of the frame components is in the form of a helix which extends continuously from a proximal end of the prosthesis to a distal end of the prosthesis.
Claim 27
Dependent Claim
32 words
A method as in claim 24, wherein the sheet providing step comprises: harvesting tissue from an animal host; and trimming the tissue into a shape selected to permit attachment to the frame.
Claim 28
Dependent Claim
15 words
A method as in claim 25, wherein the tissue is trimmed into a rectangular shape.
Claim 29
Dependent Claim
23 words
A method as in claim 24, wherein the tissue is selected from the group consisting of pericardium, fascia, rectus sheath, and venous tissue.
Claim 30
Dependent Claim
15 words
A method as in claim 24, further comprising treating the tissue with a cross-linking agent.
Claim 31
Dependent Claim
23 words
A method as in claim 28, wherein the tissue is treated by immersion in glutaraldehyde prior to attaching to the tubular support frame.
Claim 32
Dependent Claim
14 words
A method as in claim 24, further comprising implanting the prosthesis in a host.
Claim 33
Dependent Claim
21 words
A method as in claim 30, wherein the tissue was obtained from the same host into which the prosthesis is implanted.
Claim 34
Dependent Claim
24 words
A method as in claim 30, wherein the tissue was obtained from a host other than the host into which the prosthesis is implanted.
Claim 35
Dependent Claim
26 words
A method as in claim 24, wherein the tissue sheet is rolled between the components of the frame with parallel edges overlapping along a longitudinal line.
Claim 36
Dependent Claim
17 words
A method as in claim 33, wherein the edges are not connected other than by the frame.
Claim 37
Dependent Claim
17 words
A method as in claim 34, wherein the edges overlap by an arc of at least 30°.
Claim 38
Dependent Claim
27 words
A method as in claim 24, further comprising forming the tissue over a mandrel and the inner frame component prior to attaching the tissue to the frame.
Claim 39
Dependent Claim
43 words
A method as in claim 24, wherein the inner frame component and the outer frame component each comprise a helix, wherein the capturing step comprises aligning the inner helix and the outer helix so that the turns of each helix run in parallel.
Claim 40
Dependent Claim
23 words
A method as in claim 37, wherein the helical turns are positioned to be evenly spaced from each other in the longitudinal direction.
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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) | 2002-02-01 | 2002-08-03 | 2003-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-02-01 | 2006-08-03 | 2007-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-02-01 | 2010-08-03 | 2011-02-02 | $7700.00 | Window Closed / Lapsed |