Patent ID: 7766933

Claim:
A vasoocclusive device deployment system for use in placing an embolic coil at a preselected site within a vessel comprising: an elongated flexible delivery catheter having proximal and distal sections and a lumen extending therethrough; an elongated flexible deployment catheter having proximal and distal sections and a lumen extending therethrough and being slidably disposed within the lumen of the delivery catheter; an embolic coil having proximal and distal ends and a lumen extending therethrough; an elongated stretch resistant fiber having proximal and distal ends, said distal end of said stretch resistant fiber being bonded to the distal end of the embolic coil and extending through the lumen of the coil to a point proximal of the proximal end of the embolic coil; a generally cylindrical stabilization bead having an outer diameter slightly smaller than a diameter of the lumen of the embolic coil and being mounted on the stretch resistant fiber at a location in proximity to the proximal end of the embolic coil to maintain alignment of the coil about the stretch resistant fiber, said stabilization bead moves freely within said embolic coil; a headpiece mounted on the proximal end of the stretch resistant fiber and being disposed in fluid tight engagement within the lumen of the distal section of the deployment catheter; and, a source of fluid pressure coupled to the proximal section of the deployment catheter for applying a fluid pressure to the headpiece to thereby release the embolic coil from the deployment catheter.