EP0528039A1
Expired / Lapsed
EP
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Stent for vessel, structure of holding said stent, and device for mounting said stent
Assignee: Individual
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Filing: 1991-11-20
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Granted: —
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Expires: 2011-11-20
Abstract
Abstract A stent comprising a cylindrical/tubular body knitted of polymer filaments which is capable of being absorbed by an organism and is constituted of polylactic acid, polyglycolic acid, or copolymer of said acids. This cylindrical/tubular body is kept unchanged in configuration for several weeks to several months after inserted into and fixed to a vessel through a catheter having a balloon and afterward disappears while absorbed into the tissue of an organism. The invention provides a stent to prevent the vessel from being attacked by inflammation or hypertrophy and to disappear without remaining as semi-permanent foreign matters in an organism and device for mounting the stent.
Inventors
- 👤 Keiji 1-21 Wakakusa 2-Chome Igaki
- 👤 Hideo 50-19 Miyake-Cho Tamai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 03:28
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/95; A61F2/958; A61F2/82; A61F2/86; A61F2/90; A61L; A61L31/00; A61L31/04; A61L31/06; A61F2210/00; A61F2210/0004
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
15 words
A luminal stent consisting of a tubular member produced by knitting a bioresorbable polymer fiber.
Claim 2
Dependent Claim
16 words
The luminal stent as defined in claim 1 wherein the bioresorbable polymer is polylactic acid (PLA).
Claim 3
Dependent Claim
16 words
The luminal stent as defined in claim 1 wherein the bioresorbable polymer is polyglycol acid (PLA).
Claim 4
Dependent Claim
23 words
The luminal stent as defined in claim 1 wherein the bioresorbable polymer is a mixture of polylactic acid (PLA) and polyglycol acid (PLA).
Claim 5
Dependent Claim
37 words
The luminal stent as defined in claim 1 wherein one or more of polyglactin (PGA-PLA copolymer), polydioxanone, polyglyconate (copolymer of trimethylene carbonate and glycolide) and a copolymer of polyglycol acid or polylactic acid with ε-caprolactone is employed.
Claim 6
Dependent Claim
27 words
A luminal stent as defined in any of claims 1 to 5 wherein the cross-sectional shape of the bioresorbable polymer fiber is substantially circular, hollow or profiled.
Claim 7
Dependent Claim
24 words
A luminal stent as defined in any of claims 1 to 6 wherein the surface of the bioresorbable polymer fiber has irregularities or grooves.
Claim 8
Dependent Claim
31 words
A luminal stent as defined in any of claims 1 to 7 wherein the bioresorbable polymer fiber is admixed with one or more of X-ray impermeable agent, carcinostatics and anti-thrombotic agent.
Claim 9
Dependent Claim
41 words
A luminal stent as defined in any of claims 1 to 7 wherein the one or more of X-ray impermeable agent, carcinostatics and anti-thrombotic agent or cells of a living body are affixed to the surface of the bioresorbable polymer fibers.
Claim 10
Dependent Claim
28 words
A luminal stent as defined in any of claims 1 to 9 wherein a tubular body formed by knitting a yarn of a bioresorbable polymer fiber is heat-set.
Claim 11
Dependent Claim
28 words
A luminal stent holding structure comprising a luminal stent as defined in any one of claims 1 to 10 accommodated in a tube of a smaller inside diameter.
Claim 12
Dependent Claim
37 words
A luminal stent attachment device comprising the luminal stent as defined in any one of claims 1 to 10 which is fitted over a balloon forming portion in the vicinity of a distal end of a catheter.
Claim 13
Dependent Claim
25 words
The luminal stent attachment device as defined in claim 12 wherein the luminal stent produced by knitting is contracted in diameter from the as-knitted state.
Claim 14
Dependent Claim
28 words
The luminal stent attachment device as defined in claim 12 or 13 wherein both ends of the luminal stent are held by two holders secured to the catheter.
Claim 15
Dependent Claim
47 words
The luminal stent attachment device as defined in any one of claims 12 to 14 wherein a balloon is formed in a balloon forming portion under a fluid pressure supplied into a hollow part of a catheter and wherein the luminal stent is dilated by aid balloon.
References Cited (Backward Citations)
No citation records indexed.
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