Stent delivery system

• US 10,687,969 B2
• Filed: 06/28/2017
• Issued: 06/23/2020
• Est. Priority Date: 06/29/2016
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Folan, Martyn G., Rigalos, Gerasimos, Keating, Thomas M., Walsh, Michael Gerard, Forde, Bryan M.
• Primary Examiner(s): Severson, Ryan J.
• Assistant Examiner(s): Gabr, Mohamed G
• Application Number:
  US15/635,872
• Publication Number:
  US 20180000620A1
• Time in Patent Office: 1,091 Days
• CPC Class Codes: A61B 2090/0811 for the position of a particular part of an instrument with respect to the rest of the instrument, e.g. position of the anvil of a stapling instrument
• CPC Class Codes: A61B 90/08 Accessories or related features not otherwise provided for
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/852 Two or more distinct overlapping stents
• CPC Class Codes: A61F 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2/9661 the proximal portion of the stent or stent-graft is released first
• CPC Class Codes: A61F 2/9662 the middle portion of the stent or stent-graft is released first
• CPC Class Codes: A61F 2/97 the outer sleeve being splittable
• CPC Class Codes: A61F 2002/826 more than one stent being applied sequentially
• CPC Class Codes: A61F 2002/9665 with additional retaining means
• CPC Class Codes: A61F 2220/0033 made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2220/0041 using additional screws, bolts, dowels or rivets, e.g. connecting screws
• CPC Class Codes: A61F 2250/0097 Visible markings, e.g. indicia

Abstract

Stent delivery device including an inner member having a distal tip, a stent support member, and a stent disposed over a stent receiving region of the stent support member. An elongated outer sheath is slidably disposed over the inner member and the stent. The stent delivery device includes a distal junction removably coupling the distal end of the outer sheath to the distal tip, where the distal junction is actuatable to decouple the outer sheath from the distal tip. The stent delivery device includes a proximal junction removably coupling a distal portion of the outer sheath to a proximal portion of the outer sheath, where the proximal junction is actuatable to decouple the distal portion of the outer sheath from the proximal portion of the outer sheath. The distal and proximal junctions may be separately actuatable by rotating the inner member relative to the proximal portion of the outer sheath.

Claims

1. A stent delivery system comprising:

an elongated inner member extending between a distal tip and a proximal end;

a stent support member disposed over the inner member and defining a stent receiving region, the inner member slidable within the stent support member;

at least one stent surrounding 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 surrounding the stent to restrain the stent in the collapsed configuration;

a proximal junction detachably coupling the distal portion of the outer sheath to 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;

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;

wherein the distal and proximal junctions are separately actuatable by rotating the inner member relative to the proximal portion of the outer sheath with the proximal portion of the outer sheath held stationary; and

a handle assembly at the proximal end of the inner member, wherein the handle assembly includes a position marker and first and second spaced apart rotational markers indicating a rotational orientation of the inner member;

wherein the proximal junction is uncoupled when the position marker is aligned with the first rotational marker, and wherein the distal junction is uncoupled when the position marker is aligned with the second rotational marker.

2. The stent delivery system of claim 1, wherein the distal junction includes a first distal junction element disposed on the distal tip and a second distal junction element disposed on the distal end of the outer sheath, wherein the first and second distal junction elements are rotatably coupled to each other.

3. The stent delivery system of claim 1, wherein the proximal junction includes a first proximal junction element disposed on a proximal end of the distal portion of the outer sheath, a second proximal junction element disposed on a distal end of the proximal portion of the outer sheath, wherein the first and second proximal junction elements are rotatably coupled to each other.

4. The stent delivery system of claim 1, wherein the stent is deployable from a proximal-to-distal manner by uncoupling the proximal junction and moving the distal portion of the outer sleeve distally relative to the stent.

5. The stent delivery system of claim 1, wherein the stent is deployable from a distal-to-proximal manner by uncoupling the distal junction and moving the distal portion of the outer sleeve proximally relative to the stent.

6. The stent delivery system of claim 1, further comprising start position marker located between the first rotational marker and the second rotational marker, wherein both the proximal junction and the distal junction are coupled when the position marker is aligned with the start position marker.

7. The stent delivery system of claim 6, wherein the first and second rotational markers are arranged 180 degrees apart.

8. The stent delivery system of claim 1, wherein a length of the distal portion of the outer sheath is at least as long as a length of the stent.

9. The stent delivery system of claim 1, wherein the proximal junction is adjacent a proximal end of the stent.

10. The stent delivery system of claim 1, wherein the distal and proximal junctions include one or more of a threaded connection, a bayonet connection, a snap fit connection, a keyed connection, a rotational connection, and a barbed connection.

11. The stent delivery system of claim 1, wherein the distal portion of the outer sheath includes at least one axially collapsible section configured to shorten in axial length when the proximal junction or the distal junction is uncoupled.

12. A stent delivery system comprising:

an elongated inner member extending between a distal tip and a proximal end;

a stent support member disposed over the inner member and defining a stent receiving region, the inner member slidable within the stent support member;

at least one stent surrounding 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 surrounding the stent to restrain the stent in the collapsed configuration;

a proximal junction detachably coupling the distal portion of the outer sheath to 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; 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;

wherein the distal and proximal junctions are separately actuatable by rotating the inner member relative to the proximal portion of the outer sheath with the proximal portion of the outer sheath held stationary;

wherein the distal portion of the outer sheath includes at least one axially collapsible section configured to shorten in axial length when the proximal junction or the distal junction is uncoupled;

wherein the at least one axially collapsible section includes a proximal axially collapsible section and a distal axially collapsible section; and

wherein the distal portion includes a middle section positioned between the proximal and distal axially collapsible sections, the middle section configured to maintain a constant length when the proximal junction or the distal junction is uncoupled.

13. 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 with the proximal portion of the outer sheath held stationary; 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 with the proximal portion of the outer sheath held stationary;

wherein the first direction is opposite the second direction;

wherein the distal portion of the outer sheath includes at least one axially collapsible section configured to shorten in axial length when the proximal junction or the distal junction is uncoupled;

wherein the at least one axially collapsible section includes a proximal axially collapsible section and a distal axially collapsible section; and

wherein the distal portion includes a middle section positioned between the proximal and distal axially collapsible sections, the middle section configured to maintain a constant length when the proximal junction or the distal junction is uncoupled.

14. The stent delivery system of claim 13, wherein the distal junction includes a first distal junction element disposed on the distal tip and a second distal junction element disposed on the distal end of the outer sheath, wherein the first and second distal junction elements are rotatably coupled to each other;

and

wherein the proximal junction includes a first proximal junction element disposed on the proximal end of the distal portion of the outer sheath, a second proximal junction element disposed on the distal end of the proximal portion of the outer sheath, wherein the first and second proximal junction elements are rotatably coupled to each other.

15. The stent delivery system of claim 14,

wherein the distal portion of the outer sheath has a first length when:

i) the first and second proximal junction elements are rotatably coupled to each other, and

ii) the first and second distal junction elements are rotatably coupled to each other,

wherein the distal portion of the outer sheath has a second length when;

i) the first and second proximal junction elements are rotatably uncoupled from each other and the first and second distal junction elements are rotatably coupled to each other;

or

ii) the first and second proximal junction elements are rotatably coupled to each other and the first and second distal junction elements are rotatably uncoupled from each other;

wherein the second length is less than the first length.

16. The stent delivery system of claim 13, wherein the proximal axially collapsible section includes a braid and the distal axially collapsible section includes a braid.