Vaso-occlusive coil delivery system
View Patent ↗An occlusive coil delivery device includes an occlusive coil having a plurality of open pitched windings at a proximal end thereof, and a delivery wire assembly having a proximal tubular portion, a distal coil portion and a lumen, and a delivery wire adapter having a proximal end and a distal end. The delivery wire assembly having a delivery wire forming a first conductive path and extending through the lumen from a proximal end of the delivery wire assembly to a location distal of the distal coil portion, and a second conductive path formed by the proximal tubular portion and distal coil portion. The distal end of the adapter comprising a plurality of fingers configured to interface between adjacent open pitched windings of the proximal end of the occlusive coil, with the proximal end of the delivery wire adapter secured to a distal portion of the delivery wire.
1. An occlusive coil delivery system, comprising:
an occlusive coil comprising a plurality of windings, the occlusive coil having a proximal end and a distal end, the proximal end of the occlusive coil comprising a plurality of open pitched windings;
a delivery wire adapter consisting of a thin sheet of material and having a proximal end and a distal end, the distal end of the adapter defining a plurality of fingers formed in the thin sheet of material and configured to interface between adjacent open pitched windings of the proximal end of the occlusive coil; and
a delivery wire secured to the proximal end of the delivery wire adapter, the delivery wire comprising a detachment region in a portion thereof.
2. The occlusive coil delivery system of claim 1 , wherein the proximal end of the delivery wire adapter comprises an aperture dimensioned to receive a distal portion of the delivery wire.
3. The occlusive coil delivery system of claim 2 , wherein the distal portion of the delivery wire comprises a hook.
4. The occlusive coil delivery system of claim 1 , wherein the delivery wire is at least partially secured to the proximal end of the delivery wire adapter by an adhesive.
5. The occlusive coil delivery system of claim 1 , wherein the delivery wire adapter is at least partially secured by an adhesive to the open pitched windings on the proximal end of the occlusive coil.
6. The occlusive coil delivery system of claim 1 , further comprising a sleeve disposed over a portion of the proximal end of the occlusive coil having open pitched windings.
7. The occlusive coil delivery system of claim 1 , wherein the distal end of the delivery wire adapter is secured to a proximal portion of a stretch resistant member, and a distal portion of the stretch resistant member is secured to the distal end of the occlusive coil.
8. The occlusive coil delivery system of claim 7 , wherein the distal end of the delivery wire adapter defines an aperture dimensioned to receive the proximal portion of the stretch resistant member.
9. The occlusive coil delivery system of claim 8 , wherein the proximal portion of the stretch resistant member comprises a hook.
10. The occlusive coil delivery system of claim 1 , wherein the plurality of fingers includes at least one finger disposed on a first side of the delivery wire adapter, and a finger disposed on a second, opposing side of the delivery wire adapter.
11. The occlusive coil delivery system of claim 1 , wherein the plurality of fingers includes at least two fingers disposed on the first side of the delivery wire adapter, and at least one finger disposed on a second, opposing side of the delivery wire adapter.
12. The occlusive coil delivery system of claim 1 , the delivery wire comprising a proximal tubular portion, a distal coil portion, and a lumen extending at least partially through the respective proximal tubular and distal coil portions.
13. The occlusive coil delivery system of claim 12 , further comprising an outer sleeve encasing at least a portion of each of the proximal tubular portion and distal coil portion.
14. The occlusive coil delivery system of claim 13 , wherein the outer sleeve is disposed over an interface between the distal coil portion and the proximal tubular portion.
15. The occlusive coil delivery system of claim 12 , wherein the distal coil portion comprises one or more radiopaque coils.
16. The occlusive coil delivery system of claim 12 , wherein a proximal end of the distal coil portion is bonded to a distal end of the proximal tubular portion.
17. The occlusive coil delivery system of claim 1 , wherein the delivery wire adapter is cut from a sheet.
18. The occlusive coil delivery system of claim 17 , wherein the sheet comprises a biocompatible metal.
19. The occlusive coil delivery system of claim 18 , wherein the biocompatible metal comprises stainless steel.
20. The occlusive coil delivery system of claim 17 , wherein the delivery wire adapter is etched from a sheet of biocompatible metal.