| abstract |
The present invention relates to a coil assembly used for vascular occlusion comprising a helically wound primary coil that can then be wound to adopt a secondary shape. An elongation resistant element extends through the formed hole, said element being fixed to the coil, directly or indirectly, in at least two places. This element is preferably somewhat loose inside the hole to prevent the coil from breaking, blocking, therefore, stiffening during its passage through curvatures inside the human body. The primary function of the elongation-resistant element is to prevent the coil from lengthening during its movement, for example, by removal or repositioning after deployment. The device can then take a secondary form from a helically wound primary coil, preformed linearly at the source. This device is usually inserted into the body through a catheter. The device passes axially through the catheter sheath, and does not take its secondary form except after its exit from the catheter. |