Methods and apparatus for luminal stenting
First Claim
1. A method of operating a stent delivery system within a vessel of a patient, comprising:
- positioning a catheter in the vessel, the catheter having a lumen defining an axis extending between a proximal end and a distal end, such that the catheter distal end is at a treatment site;
positioning a core assembly within the catheter lumen, the core assembly having (i) an elongate member comprising a distal end, (ii) an intermediate portion comprising a distal end positioned at the member distal end, (iii) a stent having a distal portion and being carried by the intermediate portion, and (iv) a distal cover coupled to the member distal end, the distal cover being capable of rotating about a longitudinal axis with respect to the member, the core assembly being positioned within the lumen such that the intermediate portion distal end is positioned axially adjacent the catheter distal end with at least a portion of the distal cover extending in a space within the lumen radially between the intermediate portion distal end and the catheter distal end;
distally advancing the core assembly relative to the catheter to permit expansion of the stent distal portion, the expansion urging the distal cover away from the intermediate portion; and
proximally withdrawing the core assembly into the catheter such that the intermediate portion is positioned axially adjacent to the catheter distal end with the distal cover positioned out of the space.
1 Assignment
0 Petitions
Accused Products
Abstract
A stent delivery system, a core assembly, and methods of operating the same are provided. The delivery system can comprise a catheter and the core assembly. The core assembly can comprise a constraining member, protruding member, a core member, and a stent extending along the core member. The tubular constraining member can be spaced apart from the core member and define a capture area. The protruding member can be disposed along the core member at least partially distal of the capture area. The stent can have a first portion disposed within the capture area and a second portion, distal to the first portion, extending across or over an outer surface of the protruding member so that the protruding member and the constraining member cooperate to inhibit expansion of the first portion of the stent.
152 Citations
44 Claims
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1. A method of operating a stent delivery system within a vessel of a patient, comprising:
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positioning a catheter in the vessel, the catheter having a lumen defining an axis extending between a proximal end and a distal end, such that the catheter distal end is at a treatment site; positioning a core assembly within the catheter lumen, the core assembly having (i) an elongate member comprising a distal end, (ii) an intermediate portion comprising a distal end positioned at the member distal end, (iii) a stent having a distal portion and being carried by the intermediate portion, and (iv) a distal cover coupled to the member distal end, the distal cover being capable of rotating about a longitudinal axis with respect to the member, the core assembly being positioned within the lumen such that the intermediate portion distal end is positioned axially adjacent the catheter distal end with at least a portion of the distal cover extending in a space within the lumen radially between the intermediate portion distal end and the catheter distal end; distally advancing the core assembly relative to the catheter to permit expansion of the stent distal portion, the expansion urging the distal cover away from the intermediate portion; and proximally withdrawing the core assembly into the catheter such that the intermediate portion is positioned axially adjacent to the catheter distal end with the distal cover positioned out of the space. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating a stent delivery system within a blood vessel of a patient, comprising:
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positioning a catheter in the vessel, the catheter having a lumen extending between a proximal end and a distal end, such that the catheter distal end is at a treatment site; advancing a core assembly distally within the catheter, the core assembly having (i) a distal portion, (ii) a distal cover extending from the distal portion, and (iii) a stent having a distal portion and being carried by the core assembly, the distal cover being capable of rotating about a longitudinal axis with respect to the distal portion, the core assembly being advanced within the catheter such that the distal cover extends proximally from the distal portion and an annular space between the distal portion and the catheter; distally advancing the core assembly relative to the catheter to permit expansion of the stent distal portion, the expansion urging the distal cover radially away from the core assembly; and proximally withdrawing the core assembly into the catheter such that the distal cover extends distally through the annular space. - View Dependent Claims (9, 10, 11)
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12. A method of operating a stent delivery system within a blood vessel of a patient, comprising:
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positioning a catheter in the vessel, the catheter having an inner wall and a lumen extending between a proximal end and a distal end, such that the catheter distal end is at a treatment site; positioning a core assembly within the lumen, the core assembly comprising a distal cover extending in a proximal direction to at least partially cover a distal portion of a stent supported on the core assembly, the distal cover being capable of rotating about a longitudinal axis with respect to the core assembly, at least a portion of the distal cover being interposed between the stent distal portion and the inner wall; distally advancing the stent distal portion beyond the catheter distal end to permit expansion of the stent distal portion; and proximally withdrawing the core assembly into the lumen, the distal cover being retracted into the lumen in an everted configuration and oriented distally from the core assembly. - View Dependent Claims (13, 14, 15)
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16. A core assembly, comprising:
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a core member having an intermediate region and a distal tip; a stent extending over the core member intermediate region and comprising a distal portion; and a distal cover comprising a first end and a second end, the second end being coupled to the distal tip, the distal cover having a delivery orientation in which the first end (i) extends proximally relative to the distal tip and (ii) at least partially surrounds the stent, the distal cover being capable of rotating about a longitudinal axis with respect to the core member, the distal cover being movable from the delivery orientation to an everted orientation wherein the first end is positioned distally relative to the second end. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A core assembly, comprising:
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a core member having an intermediate region; a stent extending over the core member intermediate region; and a distal cover comprising a first end and a second end, the second end being coupled to the core member so as to be capable of rotating about a longitudinal axis with respect to the core member, the distal cover having a delivery orientation in which the first end extends proximally relative to the intermediate region, the distal cover being movable from the delivery orientation to an everted orientation wherein the first end is positioned distally relative to the second end. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
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39. A core assembly for delivering a stent to an intracranial blood vessel, comprising:
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a core member configured for advancement into the intracranial blood vessel; a stent extending over the core member; and a distal cover comprising a first end and a second end, the second end being coupled to the core member so as to be capable of rotating about a longitudinal axis with respect to the core member, the distal cover having a delivery orientation in which the first end extends proximally relative to a distal end of the core assembly, the distal cover being movable from the delivery orientation to an everted orientation wherein the first end is positioned distally relative to the second end. - View Dependent Claims (40, 41, 42, 43, 44)
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Specification