Detachment indicator for implant deployment

A method for using a delivery system to deploy an implantable medical device to a target location of a body vessel, the method comprising:

• providing a tubular body comprising a lumen extending therethrough;
• extending a pull wire through the lumen;
• providing a proximal support tube disposed within the lumen, the proximal support tube comprising a marked distal section covered by the tubular body such that the marked distal section is not visible to an operator of the delivery system;
• engaging a proximal end of the pull wire to the proximal support tube such that proximal translation of the proximal support tube causes the pull wire to be translated proximally;
• securing the implantable medical device to the tubular body with the pull wire;
• delivering the implantable medical device to the target location of the body vessel while the marked distal section remains covered by the tubular body;
• and
• translating the proximal support tube proximally to release the implantable medical device from a distal end of the tubular body, thereby moving the marked distal section proximally out of the lumen so that the marked distal section is visible.