Stent delivery assembly
The present invention provides a stent delivery assembly including: a catheter including a shaft having a proximal end and a distal end, and a balloon provided closer to the proximal end than the distal end on the shaft; and a stent having a tubular shape, and coupled to the balloon to surround an outer circumferential surface of the balloon, wherein the balloon includes a main body having a first end and a second end, the stent is located to be biased towards the first end, such that the main body includes a preferential inflation region exposed to the outside between the second end and the stent, the main body is formed to extend with a diameter that is constant from the first end to the second end, and while the balloon is inflated, a portion of the stent close to the preferential inflation region is inflated in a tapered shape by a force caused when the preferential inflation region is preferentially inflated.
1 . A stent delivery assembly comprising:
a catheter including a shaft having a proximal end and a distal end, and a balloon provided closer to the proximal end than the distal end on the shaft; and
a stent having a tubular shape, and coupled to the balloon to surround an outer circumferential surface of the balloon,
wherein the balloon includes a main body having a first end and a second end,
the stent is located to be biased towards the first end, such that the main body of the balloon includes a preferential inflation region that is not surrounded by the stent in a region between the second end and the stent and a delayed inflation region surrounded by the stent,
the main body is formed to extend in an uninflated state with a diameter that is constant from the first end to the second end,
the stent delivery assembly is configured such that while the balloon is inflated, a portion of the stent surrounding a distal end of the delayed inflation region close to the preferential inflation region is inflated to form a tapered shape portion by a force caused when the preferential inflation region is preferentially inflated,
a length of the preferential inflation region is within a range of 3 mm to 6 mm, and
an initial angle of the tapered shape portion is inclined within a range of 39° to 43° from a central axis of the catheter.
2 . The stent delivery assembly of claim 1 , wherein
the shaft further includes a lumen communicating with an inner space of the main body, and
the balloon is configured to be inflated by a fluid supplied into the inner space through the lumen.
3 . The stent delivery assembly of claim 1 , wherein
in a process in which the balloon is inflated, the preferential inflation region is preferentially inflated while the delayed inflation region is subjected to resistance to inflation by the stent.
4 . A stent delivery assembly comprising:
a catheter including a shaft having a proximal end and a distal end, and a balloon provided closer to the proximal end than the distal end on the shaft; and
a stent having a tubular shape, and coupled to the balloon to surround an outer circumferential surface of the balloon,
wherein the balloon includes a main body having a first end and a second end,
the stent is located to be biased towards the first end, such that the main body of the balloon includes a preferential inflation region that is not surrounded by the stent in a region between the second end and the stent and a delayed inflation region surrounded by the stent,
the main body is formed to extend in an uninflated state with a single inner space having a diameter that is constant from the first end to the second end,
in a process in which the balloon is inflated, a portion of the stent surrounding a distal end of the delayed inflation region close to the preferential inflation region is inflated to form a tapered shape portion by a force caused when the preferential inflation region of the balloon is preferentially inflated as compared to a proximal end of the delayed inflation region of the balloon subjected to resistance to inflation,
a length of the preferential inflation region is within a range of 3 mm to 6 mm, and
an initial angle of the tapered shape portion is inclined within a range of 39° to 43° from a central axis of the catheter.
5 . The stent delivery assembly of claim 4 , wherein the first end is located closer to the proximal end of the shaft than the second end.
6 . A stent delivery assembly comprising:
a catheter including a shaft having a proximal end and a distal end, and a balloon provided closer to the proximal end than the distal end on the shaft; and
a stent having a tubular shape, and coupled to the balloon to surround an outer circumferential surface of the balloon,
wherein the balloon includes a main body having a first end and a second end,
the stent is located to be biased towards the first end, such that the main body of the balloon includes a preferential inflation region that is not surrounded by the stent in a region between the second end and the stent and a delayed inflation region surrounded by the stent,
the main body is formed to extend in an uninflated state with a single inner space having a single diameter that is constant from the first end to the second end,
the shaft includes a lumen communicating with the single inner space,
in a process in which the balloon is inflated by a fluid supplied into the single inner space through the lumen, a portion of the stent surrounding a distal end of the delayed inflation region close to the preferential inflation region is inflated to form a tapered shape portion by a force caused when the preferential inflation region of the balloon is preferentially inflated as compared to a proximal end of the delayed inflation region of the balloon subjected to resistance to inflation,
a length of the preferential inflation region is within a range of 3 mm to 6 mm, and
an initial angle of the tapered shape portion is inclined within a range of 39° to 43° from a central axis of the catheter.
7 . The stent delivery assembly of claim 6 , the first end is located closer to the proximal end of the shaft than the second end.