EP0754435A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Stretch-resistant vaso-occlusive coils
Assignee: Target Therapeutics Inc
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Filing: 1996-06-28
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Granted: —
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Expires: 2016-06-28
Abstract
Abstract This is an implantable vaso-occlusive device. It is typically a vaso-occlusive coil comprised of a primary helically wound coil which may then be wound into a secondary shape. Central to the invention is the use of a stretch-resisting member fixedly attached within at least a portion of the primary coil. The stretch-resisting member may be formed into coil tips at the ends of the coil by melting the polymeric fibers or alloys or by attaching the fibers with a glue. This stretch-resisting member is for the primary purpose of preventing stretching of the coil during movement of that coil, e.g., by retrieval or repositioning after deployment. The device typically has a self-forming secondary shape made from a pre-formed primary linear helically wound coil, although it need not have the secondary form. External fibers may be attached to the device and affixed to the pre-formed linear member to increase. The vaso-occlusive member may be also be covered with a fibrous braid. The device is typically introduced into the body through a catheter. The device is passed axially through the catheter sheath and assumes its secondary form upon exiting the catheter.
Inventors
- 👤 Christopher G.M. Ken
- 👤 Son M. Gia
- 👤 Erik T. Engelson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 12:37
CPC Classifications
A; A61; A61M; A61M29/00; A61B; A61B17/00; A61B17/12; A61B17/12022; A61B17/12099; A61B17/12109; A61B17/12113; A61B17/12131; A61B17/1214; A61B17/12145; A61B17/1215; A61B17/12154; A61B2017/00831; A61B2017/00867; A61B2017/1205; A61B2017/12054; A61B2017/12063; A61B90/00; A61B90/39; A61B2090/3937; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30092; A61F2210/00; A61F2210/0014; A61F2210/0019
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
50 words
A vaso-occlusive device comprising: (i) an outer helically wound primary coil having a first end and a second end, defining a lumen between said first end and second end, and (ii) a stretch-resisting member extending through said lumen and fixedly attached to said primary coil in at least two locations.
Claim 2
Dependent Claim
22 words
The device of claim 1 comprising a deployment tip attached to at least one of said first end or said second end.
Claim 3
Dependent Claim
23 words
The device of claim 2, wherein said deployment tip comprises a mechanically detachable end adapted to attach to and detach from a pusher.
Claim 4
Dependent Claim
28 words
The device of claim 2, wherein said deployment tip comprises an electrolytically detachable end adapted to detach from a pusher by imposition of a current on said pusher.
Claim 5
Independent Claim
15 words
The device of any preceding claim, wherein said stretch-resisting member comprises at least one fiber.
Claim 6
Independent Claim
13 words
The device of any preceding claim, wherein said stretch-resisting member comprises multiple fibers.
Claim 7
Independent Claim
13 words
The device of any preceding claim, wherein said stretch-resisting member comprises a wire.
Claim 8
Independent Claim
14 words
The device of any preceding claim, wherein said stretch-resisting member comprises a helical coil.
Claim 9
Independent Claim
13 words
The device of any preceding claim, wherein the device has a secondary form.
Claim 10
Independent Claim
28 words
The device of any preceding claim, wherein said helically wound coil comprises a metal selected from the group consisting of platinum, palladium, rhodium, gold, tungsten, and their alloys.
Claim 11
Dependent Claim
17 words
The device of claim 10, wherein said helically wound coil comprises an alloy of platinum and tungsten.
Claim 12
Independent Claim
29 words
The device of any one of claims 1 to 9, wherein said helically wound coil comprises an alloy selected from the group consisting of stainless steels and super-elastic alloys.
Claim 13
Dependent Claim
15 words
The device of claim 12, wherein said helically wound coil comprises a nickel-titanium super-elastic alloy.
Claim 14
Independent Claim
13 words
The device of any preceding claim comprising a polymer containing a radio-opaque filler.
Claim 15
Independent Claim
16 words
The device of any preceding claim additionally comprising external filamentary material attached to said primary coil.
Claim 16
Independent Claim
13 words
The device of any preceding claim, wherein the stretch-resisting member comprises a polymer.
Claim 17
Dependent Claim
12 words
The device of claim 16, wherein the stretch-resisting member comprises a thermoplastic.
Claim 18
Dependent Claim
11 words
The device of claim 17, wherein said thermoplastic comprises polyethylene terephthalate.
Claim 19
Dependent Claim
22 words
The device of claim 17, wherein said thermoplastic also forms a cap located on at least one end of said primary coil.
Claim 20
Dependent Claim
17 words
The device of claim 19, wherein said cap is of the same diameter as said primary coil.
Claim 21
Dependent Claim
19 words
The device of claim 19 or 20, wherein said thermoplastic forms caps at both ends of said primary coil.
Claim 22
Independent Claim
20 words
The device of any preceding claim, wherein the stretch-resisting member adheres to at least one end of said primary coil.
Claim 23
Independent Claim
29 words
The device of any preceding claim, wherein the stretch-resisting member extends through said lumen and is fixedly attached to at least one of said first end and second ends.
Claim 24
Independent Claim
29 words
The device of any preceding claim, wherein the stretch-resisting member extends through said lumen and is fixedly attached to at least one of said first end and second ends.
Claim 25
Independent Claim
13 words
The device of any preceding claim, wherein the stretch-resisting member comprises a ribbon.
Claim 26
Dependent Claim
25 words
The device of claim 25, wherein said ribbon comprises a metal selected from the group consisting of platinum, palladium, rhodium, gold, tungsten, and their alloys.
Claim 27
Dependent Claim
15 words
The device of claim 26, wherein said ribbon comprises an alloy of platinum and tungsten.
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