| 摘要 |
<p>A vaso-occlusive coil comprises a primary helically wound coil which may then be wound into a secondary shape. A stretch-resisting member extends through the lumen formed, which stretch-resisting member is fixedly attached, directly or indirectly, to the coil in at least two locations. The stretch-resisting member is preferably somewhat loose within the interior of the lumen so to prevent the coil from collapsing, binding, and therefore stiffening during passage of turns through the human body. This stretch-resisting member is for the primary stretching of the coil during movement of that coil, e.g., by retrieval of repositioning after deployment. The device may have a self-forming secondary shape made from a pre-formed primary linear helically wound coil. 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.</p> |
