Patent ID: 7556631

Claim:
A small diameter vasoocclusive device deployment system for use in placing a vasoocclusive device at a preselected site within a vessel comprising: an elongated flexible catheter having a lumen extending therethrough so as to define an outer wall and having a proximal section and a distal section; a vasooclusive device assembly comprised of a flexible vasooclusive device having proximal and distal ends and a cylindrical headpiece having proximal and distal sections, the distal section of the headpiece is disposed within the proximal end of the vasooclusive device and the proximal section of the headpiece extends outwardly beyond the proximal end of the vasooclusive device, said proximal section of the cylindrical headpiece having a diameter approximately equal to the diameter of the lumen of the catherer, and said proximal section of said cylindrical headpiece being disposed in fluid-tight engagement within the lumen of the distal section of the catheter; and, a connector coupled to the proximal section of the catheter and adapted for coupling a source of fluid pressure to the interior of the catheter to thereby cause the cylindrical headpiece to be released from the lumen of the catheter to thereby deploy the vasoocclusive device assembly.