A technique for safe withdrawal of a catheter tip that hooks a coil loop.

In cerebral aneurysm embolization with GDCs, coil movement and subsequent coil protrusion or migration may occur during catheter withdrawal. Coil migration or protrusion usually does not produce clinical problems, but sometimes it may do. Because the consequences of coil movement cannot be anticipated exactly, coil motion during a catheter withdrawal makes interventionists nervous. The authors report on a technique for safe withdrawal of a catheter tip that hooks a coil loop using a small soft coil.