Occlusive device delivery system with mechanical detachment

摘要

A delivery system for an embolic coil including a delivery tube having a lumen. A proximal coil junction is disposed between the delivery tube and the embolic coil. Insertable through the lumen and extending proximally beyond the proximal end of the delivery tube is a detachable wire with a terminating feature disposed on its distal end. At least one stretch resistant member is disposed within a lumen formed by the embolic coil. A distal end of each of the at least one stretch resistant members is secured to a distal end of the embolic coil, while each of the at least one stretch resistant members is also secured proximate the proximal end of the embolic coil. The distal end of the delivery tube is retained by the wire physically against without being attached in any way to the proximal junction.

主权项

1. A combination delivery system and embolic coil, the system comprising:
a delivery tube having a distal end, an opposite end, a lumen define axially therethrough; a proximal coil junction disposed between the delivery tube and the embolic coil; the proximal coil junction having a proximal end and an opposite distal end; a detachable wire having a proximal end and an opposite distal end; a terminating feature being disposed on the distal end of the wire; the wire being insertable through the lumen and extending proximally beyond the proximal end of the delivery tube; and at least one stretch resistant member disposed within a coil lumen formed by the embolic coil; a distal end of each of the at least one stretch resistant members being secured to a distal end of the embolic coil, while each of the at least one stretch resistant members is also secured proximate the proximal end of the embolic coil; wherein the proximal coil junction comprises a two piece mating adapter including a first component secured to the distal end of the delivery tube and a second component secured to the proximal end of the embolic coil; the two-piece mating adapter having a first channel defined longitudinally therethrough for receiving therein the terminating feature of the wire and a second channel defined traverse to and intersecting with the first channel; the system further comprises a coil connecting member receivable in the second channel and threadable through the terminating feature of the wire.