US 8,133,265 B2 · Guide catheter, and stent delivery system

Abstract

This stent delivery system includes: a guide catheter inserted inside a stent, and inserted into the interior of the living body with the stent by a guide member inserted inside the guide catheter; a guide member inserted inside the guide catheter, and which guides the guide catheter and the stent to the interior of a living body; a pusher catheter inserted into the interior of the living body with the guide catheter in a state where the guide catheter is inserted inside the pusher catheter, and which pushes the stent along the guide catheter; and an engaging portion disposed on a head section of the guide catheter protruding from the stent, which engages with the stent in a state where the guide member is inserted into the head section, and which releases the stent in a state where the guide member is retracted away from the head section.

Claims25

Dependent claims

A guide catheter being insertable inside a stent and inside a pusher catheter which pushes the stent, and adapted for being inserted into the interior of a living body with the stent and the pusher catheter by being guided along a guide member inserted inside the guide catheter, the guide catheter comprising:

an elongated tubular main body;
and
an engaging portion formed at a head section of the main body so as to be integrated with the main body and to protrude outward from an outside surface of the main body,
wherein, in a state where the guide member is inserted into the main body, the engaging portion is supported by the guide member from the inside thereof, thereby the engaging portion protrudes outward and contacts only a distal end of the stent put on the distal end of the pusher catheter,
in a state where the guide member is retracted away from the main body, the engaging portion loses the support by the guide member from the inside of the main body, thereby the engaging portion allows release of the stent from the guide catheter.

2 more elements

A stent delivery system for placing a cylindrically-shaped stent at a desired position within a living body, the stent delivery system comprising:

a guide catheter being insertable to the inside of the stent, and adapted for being insertable into the interior of the living body with the stent by a guide member inserted inside the guide catheter;
and
a pusher catheter formed in a tube shape, and adapted for being insertable into the interior of the living body with the guide catheter in a state where the guide catheter is inserted inside the pusher catheter, and which is for pushing the stent along the guide catheter;
wherein the guide catheter comprising;
an elongated tubular main body;
and
an engaging portion formed at a head section of the main body so as to be integrated with the main body and to protrude outward from an outside surface of the main body,
wherein, in a state where the guide member is inserted into the main body, the engaging portion is supported by the guide member from the inside thereof, thereby the engaging portion protrudes outward and contacts only a distal tip surface of the stent,
a distal end of the pusher catheter contacts only a proximal tip surface of the stent,
the stent is held between the engaging portion and the distal end of the pusher catheter, and
wherein, in a state where the guide member is retracted away from the main body, the engaging portion loses the support by the guide member from the inside of the main body, thereby the engaging portion allows release of the stent from the guide catheter.

8 more elements

Dependencies are inferred from the claim text.

Guide catheter, and stent delivery system

Life of this patent

Guide catheter, and stent delivery system

Life of this patent

Abstract

Claims25