Stent delivery system

A stent delivery system comprising:

• an elongated inner member having a proximal end and a distal end, the inner member including a distal tip at the distal end;
• a stent support member disposed over the inner member and having a stent receiving region proximal of the distal tip of the inner member, the inner member being slidably disposed within the stent support member;
• at least one self-expanding stent disposed over the stent receiving region of the stent support member, the stent having a collapsed configuration and an expanded configuration;
• an elongated outer sheath slidably disposed over the inner member, the outer sheath extending between a distal end and a proximal end, the outer sheath including a proximal portion and a distal portion located distal of the proximal portion, the distal portion of the outer sheath extending to the distal end of the outer sheath and surrounding the stent to restrain the stent in the collapsed configuration;
• a proximal junction detachably coupling a proximal end of the distal portion of the outer sheath to a distal end of the proximal portion of the outer sheath, the proximal junction being actuatable to selectively uncouple the distal portion of the outer sheath from the proximal portion of the outer sheath by rotating the inner member relative to the proximal portion of the outer sheath in a first rotational direction;
• and
• a distal junction detachably coupling the distal end of the outer sheath to the distal tip of the inner member, the distal junction being actuatable to selectively uncouple the outer sheath from the distal tip by rotating the inner member relative to the proximal portion of the outer sheath in a second rotational direction;
• wherein the first direction is opposite the second direction.

A method of selectively deploying a stent in a proximal-to-distal manner or in a distal-to-proximal manner, comprising:

• advancing a stent delivery system to a target location in a body lumen, the stent delivery system including an inner member having a distal tip, a stent support member disposed over the inner member, the stent support member having a stent receiving region proximal of the distal tip of the inner member, a stent surrounding the stent receiving region of the stent support member, and an outer sleeve having a proximal portion and a distal portion located distal of the proximal portion, the distal portion surrounding the stent to retain the stent in a collapsed configuration;
• deploying the stent in a proximal-to-distal manner by:
• rotating the inner member relative to the proximal portion of the outer sheath in a first rotational direction to selectively decouple distal portion of the outer sheath from the proximal portion of the outer sheath;
• and
• moving the distal portion of the outer sheath distally relative to the stent to uncover the stent;
• or
• deploying the stent in a distal-to-proximal manner by:
• rotating the inner member relative to the proximal portion of the outer sheath in a second rotational direction, opposite the first rotational direction, to selectively decouple distal portion of the outer sheath from the distal tip;
• and
• moving the distal portion of the outer sheath proximal relative to the stent to uncover the stent.