Stretch resistant vaso-occlusive coils
First Claim
1. A vaso-occlusive device comprising:
- i. an outer helically wound primary coil having a first end and a second end, an axis between said first and second ends, and having a lumen between said first end and second end, andii. a stretch-resisting member extending through at least a portion of said lumen and fixedly attached to said primary coil in at least two axially separated locations.
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Accused Products
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.
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Citations
8 Claims
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1. A vaso-occlusive device comprising:
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i. an outer helically wound primary coil having a first end and a second end, an axis between said first and second ends, and having a lumen between said first end and second end, and ii. a stretch-resisting member extending through at least a portion of said lumen and fixedly attached to said primary coil in at least two axially separated locations.
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2. A vaso-occlusive device comprising:
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i. an outer helically wound primary coil having a first end and a second end, an axis between said first and second ends, and having a lumen between said first end and second end, ii. a polymeric stretch-resisting member extending through at least a portion of said lumen and fixedly attached to said primary coil in at least two axially separated locations; and iii. a deployment tip attached to at least one of said first end or said second end, said deployment tip comprising an electrolytically detachable end adapted to detach from a pusher by imposition of a current upon said pusher, and wherein the polymeric stretch-resisting member allows for repositioning of the vaso-occlusive device after deployment. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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Specification