Delivery system for a self-expanding medical device

A self-expanding medical device delivery system, comprising:

• a self-expanding medical device comprising a distal end, a proximal end and a length therebetween;
• an inner catheter extending proximally from said medical device to a deployment handle, said inner catheter comprising a stop surface adjacent said proximal end of said medical device and adapted to prevent said medical device from moving proximally during deployment of said medical device;
• a restraining sheath comprising a first portion extending over said medical device and adapted to prevent said medical device from self-expanding prior to deployment of said medical device and a second portion extending proximally of said medical device to a proximal end of said restraining sheath, said second portion having a constant outer profile that is smaller than a constant outer profile of said first portion, and the proximal end of said restraining sheath terminating distally from said deployment handle;
• and
• at least one wire adhered to the second portion of said restraining sheath and extending proximally from said restraining sheath to said deployment handle;
• wherein said medical device is deployed by pulling said at least one wire proximally to withdraw said restraining sheath proximally away from said medical device;
• and
• wherein said restraining sheath comprises a thermoplastic polymer, and a coil is embedded within the thermoplastic polymer and extends along at least a portion of said length of said medical device.

A self-expanding medical device delivery system, comprising:

• a self-expanding medical device comprising a distal end, a proximal end and a length therebetween;
• an inner catheter extending proximally from said medical device to a deployment handle, said inner catheter comprising a stop surface adjacent said proximal end of said medical device and adapted to prevent said medical device from moving proximally during deployment of said medical device;
• a restraining sheath comprising a first portion extending over said medical device and adapted to prevent said medical device from self-expanding prior to deployment of said medical device and a second portion extending proximally of said medical device to a proximal end of said restraining sheath, said second portion having a constant outer profile that is smaller than a constant outer profile of said first portion, and the proximal end of said restraining sheath terminating distally from said deployment handle;
• at least one wire adhered to the second portion of said restraining sheath and extending proximally from said restraining sheath to said deployment handle;
• and
• a covering sheath extending from said restraining sheath to said deployment handle and fixed to said deployment handle, said covering sheath extending over and disposed radially outward from an outer surface of at least said proximal end of said restraining sheath, a distal end of said covering sheath provided with an inner diameter that closely fits onto an outer diameter of said proximal end of said restraining sheath, and the distal end of said covering sheath including an atraumatic tapered end that provides a smooth transition between said restraining sheath and said covering sheath;
• wherein said medical device is deployed by pulling said at least one wire proximally to withdraw said restraining sheath proximally away from said medical device, and
• wherein a longitudinal space inside said covering sheath is formed to receive said movable restraining sheath withdrawn proximally away from said medical device.