EP0257091B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
An intravascular stent and percutaneous insertion system
Assignee: Individual
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Filing: 1987-02-13
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Granted: 1993-07-28
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Expires: 2007-02-13
Abstract
Abstract A method and apparatus for preventing arterial restenosis by placing a coil spring stent into the vessel. A stent insertion catheter (20) contains an outer cylinder (24) and inner core (22) within a tapered front (23) and spiral grooves (26). The coil stent (10) is placed within the spiral grooves. When the outer cylinder (24) is pulled back the coil stent is deployed. Also disclosed is a novel coil stent having a plurality of layers. The outer layer (46) is made from a non-thrombogenic material.
Inventors
- 👤 Robert E. Fischell
- 👤 Tim A. Fischell
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 09:29
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/95; A61F2/958; A61F2/82; A61F2/86; A61F2/88; A61L; A61L31/00; A61L31/08; A61L31/082; A61L31/084; A61L31/10; A61F2/0077; A61F2/962; A61F2/966; A61F2002/9665; A61F2210/00; A61F2210/0076
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
249 words
A stent insertion apparatus (20) having an inner core member (22) defining distal and proximal ends, a hollow outer sheath cylinder (24) defining distal and proximal ends and having an inner surface slidably mounted around and movable relative to said inner core member (22) characterized by: a helical groove formed within an outer surface of said inner core member (22) extending from said distal end to said proximal end of said inner core member (22) said groove receiving a coil stent (10), said hollow outer sheath cylinder (24) being movable relative to said inner core member (22) from a first position covering said helical groove (26) to a second position exposing said helical groove (26) wherein cooperation of said helical groove (26) of said inner core member (22) with said inner surface of said hollow sheathing cylinder (24) forms a helical cavity adapted to contain said coil stent (10) when said outer sheath cylinder (24) is in said first position, whereby said coil stent (10) is held in a radially compressed state within said helical cavity by exerting a radial outward force on said outer sheath cylinder (24) when said outer sheath cylinder (24) is in its first position and is released from said helical cavity and radially expandable by its intrinsic mechanical properties to a larger diameter when said outer sheath cylinder (24) is moved to said second position without the requirement of relative axial rotation between said inner core member (22) and said outer sheath cylinder (24).
Claim 2
Dependent Claim
29 words
The apparatus (20) of claim 1, wherein said inner core member (22) further comprises a flange means, adapted to frictionally engage the proximal end of said coil stent (10).
Claim 3
Dependent Claim
62 words
The apparatus of claim 2, wherein said flange means comprises: a back groove (28) cut into the surface of said inner core member (22) and adapted to contain the proximal end of said coil stent (10); and, a flange (30) located adjacent to said back groove (28) and adapted to prevent radial movement of said coil stent (10) which is frictionally engaged.
Claim 4
Dependent Claim
20 words
The apparatus (20) of Claim 1, wherein said inner core member (22) comprises a rounded and tapered distal end (23).
Claim 5
Dependent Claim
65 words
The apparatus (20) of claim 1, further comprising a control means of moving the distal end of said sheathing cylinder (24) from said first position to said second position relative to the distal end of said inner core member (22) and deploying said coil stent (10) without the requirement of axial rotation of the outer sheathing cylinder (24) relative to the inner core member (22).
Claim 6
Dependent Claim
111 words
The apparatus (20) of claim 5, wherein the proximal end of said sheathing cylinder (24) and said inner core member (22) extend external to said living body, and wherein said control means comprises a first handle (32) operably coupled to a proximal portion of said sheathing cylinder (24), and a second handle (36) operably coupled to a proximal portion of said inner core member (22), wherein movement of said first handle (32) toward said second handle (36) causes movement of the distal ends of said sheathing cylinder (24) from said first position to said second position relative to said inner core member (22) so as to release said coil stent (10).
References Cited (Backward Citations)
No citation records indexed.
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