Occluding device and method of manufacturing occluding devices
View Patent ↗An occluding device for occlusion of fluid flow through a lumen of a body vessel manufactured by wedging fibers between adjacent coil windings of a primary coil so that the fibers extend generally radially across the primary coil body between the primary coil windings and outward therefrom. An elongated adhesive is inserted applicator into the primary coil lumen and subsequently proximally withdrawn while simultaneously depositing along the primary coil windings. The fibers and the adhesive are placed in overlapping locations so that the fibers extend through the adhesive. The fibers are thus blocked from slipping along their length relative to the coil body by the adhesive adhering to the fibers inside the primary coil lumen. The adhesive extends radially outward from the coil lumen no farther than the outer primary coil radius. The adhesive adheres to the fibers and may or may not adhere with the primary coil windings.
1. An occluding device for occlusion of fluid flow through a lumen of a body vessel, the device comprising:
a primary coil having primary coil windings forming a primary coil body with an outer primary coil radius and a primary coil lumen; and
fibers attached to the primary coil, the fibers having a length extending generally radially across the primary coil body between the primary coil windings and outward therefrom, the fibers being blocked from slipping along their length relative to the coil body by an adhesive adhering to the fibers inside the primary coil lumen, the adhesive being limited to locations no farther outward than the outer primary coil radius, wherein the adhesive is made of a material that does not form a bond with the primary coil windings.
2. The device of claim 1 , wherein the adhesive is made of a durably elastic material.
3. The device of claim 1 , wherein the adhesive joins a plurality of fiber strands into a fiber bundle.
4. The device of claim 3 , wherein at least two fiber strands of the fiber bundle extend across the primary coil body between different coil windings.
5. The device of claim 1 , wherein the adhesive thickens the fibers inside the primary coil lumen to a thickness greater than a distance between adjacent primary coil windings.
6. The device of claim 5 , wherein the thickness is greater than the distance between adjacent coil windings when the primary coil is in a bent configuration.
7. The device of claim 6 , wherein the primary coil has a relaxed shape that is curled into a secondary coil having a series of secondary loops, the thickness being greater than the distance between the adjacent coil windings when the primary coil is in its relaxed shape.
8. The device of claim 1 , wherein the adhesive is made of a material that forms bonds with both the fibers and the primary coil windings.