Occlusive device with stretch resistant member and anchor filament

摘要

A stretch-resistant occlusive device, and method of manufacturing such a device, having a helically wound coil defining a coil lumen extending along the entire axial length of the coil from a proximal end portion to a distal end portion. The device further includes a headpiece having a proximal end, a distal end attached to the proximal end portion of the coil, and a headpiece lumen extending between the proximal and distal ends of the headpiece. An anchor filament extends through the headpiece lumen, has at least one proximal end secured to the proximal end of the headpiece, and has a distal portion defining an eye positioned distal to the distal end of the headpiece. A stretch resistant member is positioned within the coil lumen, has a proximal portion extending through the eye, and has at least one distal end secured to the distal end of the coil.

主权项

1. A stretch-resistant occlusive device comprising:
a helically wound coil defining a coil lumen extending along the entire axial length of the coil, the coil having a proximal end portion and a distal end portion; a headpiece having a proximal end and a distal end, the distal end being attached to the proximal end portion of the coil, and defining a headpiece lumen extending between the proximal and distal ends of the headpiece; an anchor filament extending through the headpiece lumen, having at least one proximal end secured to the proximal end of the headpiece, and having a distal portion defining an eye positioned distal to the distal end of the headpiece, the anchor filament being a single continuous element that is folded at the distal end to form the eye; and a stretch resistant member, positioned within the coil lumen, having a proximal portion extending through the eye and having at least one distal end secured to the distal end of the coil; wherein the helically wound coil is substantial cylindrical and defines the coil lumen to have a lumen diameter at its proximal end; and wherein the headpiece is substantially cylindrical with a mean distal diameter and a mean proximal diameter, and further includes at least one stop element positioned between the proximal and distal mean diameters and projecting radially outwardly beyond both mean diameters.