Fixed stent delivery devices and methods
First Claim
1. A stent delivery device for delivering a plurality of stent segments to a treatment site, the device comprising:
- a catheter shaft having a proximal end and a distal end;
an expandable member coupled with the catheter shaft near the distal end;
a plurality of stent segments mounted on the expandable member; and
at least a first axially movable sheath disposed over at least part of the catheter shaft, the expandable member and the stent segments, wherein the first sheath is adapted to constrain expansion of a first portion of the expandable member and stent segments thereon while allowing expansion of a second portion of the expandable member and stent segments thereon.
3 Assignments
0 Petitions
Accused Products
Abstract
Stent delivery devices and methods include multiple stents or stent segments mounted at fixed positions on an expandable member of the stent delivery catheter. One or more of the fixed-position stents may be selectively deployed in a body lumen such as a blood vessel by positioning one or more sheaths to constrain some stents while exposing other for deployment. Some embodiments include two axially movable sheaths for serially deploying stents while containing a portion of the expandable balloon from which stents have been deployed. Other embodiments include inner and outer balloon shafts to allow the balloon to be retracted into the delivery catheter as stents are deployed. Devices and methods of the invention provide enhanced serial deployment of multiple stents or stent segments while reducing the risk of damage to an expandable deployment member.
-
Citations
28 Claims
-
1. A stent delivery device for delivering a plurality of stent segments to a treatment site, the device comprising:
-
a catheter shaft having a proximal end and a distal end;
an expandable member coupled with the catheter shaft near the distal end;
a plurality of stent segments mounted on the expandable member; and
at least a first axially movable sheath disposed over at least part of the catheter shaft, the expandable member and the stent segments, wherein the first sheath is adapted to constrain expansion of a first portion of the expandable member and stent segments thereon while allowing expansion of a second portion of the expandable member and stent segments thereon. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A stent delivery device for delivering a plurality of stent segments to a treatment site, the device comprising:
-
a catheter shaft having a proximal end and a distal end;
an expandable member coupled with the catheter shaft near the distal end;
a plurality of stent segments mounted at fixed positions on the expandable member;
at least one axially movable sheath disposed over at least part of the catheter shaft, the expandable member and the stent segments, wherein the sheath is adapted to constrain expansion of a first portion of the expandable member and stent segments thereon while allowing expansion of a second portion of the expandable member and stent segments thereon; and
an inner shaft slidably disposed within the catheter shaft, wherein the expandable member includes a distal end coupled with the inner shaft for retracting relative to the catheter shaft a portion of the expandable member from which at least one stent segment has been deployed.
-
-
7. An interventional catheter device comprising:
-
a catheter shaft having a proximal end and a distal end;
an expandable member coupled with the catheter shaft near the distal end;
a distal sheath axially movable relative to the expandable member and positionable over at least a distal portion thereof; and
a proximal sheath axially movable relative to the expandable member and the distal sheath and positionable over at least a proximal portion of the expandable member, wherein the distal and proximal sheaths are axially positionable to expose a selected portion of the expandable member to allow expansion thereof while covering another portion of the expandable member to constrain expansion thereof. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
-
-
15. A stent delivery device for delivering a plurality of stent segments to a treatment site, the device comprising:
-
a catheter shaft having a proximal end and a distal end;
a plurality of self-expanding stent segments disposed on the catheter shaft;
a distal sheath axially movable relative to the stent segments and positionable over at least one distal segment; and
a proximal sheath axially movable relative to the stent segments and the distal sheath and positionable over at least one proximal segment, wherein the distal and proximal sheaths are axially positionable to expose one or more selected stent segments to allow expansion thereof while covering one or more other stent segments to constrain expansion thereof.
-
-
16. A method for delivering a plurality of stent segments to a treatment site, the method comprising:
-
positioning a distal portion of a stent delivery catheter device at the treatment site;
moving at least a first sheath of the catheter device to expose at least part of an expandable member on the catheter device and at least one of a plurality of stent segments mounted on the expandable member; and
expanding the expandable member to deploy at least one of the plurality of stent segments at the treatment site. - View Dependent Claims (17, 18, 19, 20, 21)
-
-
22. A method for delivering a plurality of stent segments to treatment sites in a body lumen, the method comprising:
-
positioning a distal portion of a stent delivery catheter device in the body lumen, the delivery catheter having a plurality of stent segments mounted thereon;
moving at least a first sheath of the catheter device to deploy a first selected number of stent segments at a first treatment site; and
moving at least the first sheath to deploy a second selected number of stent segments at a second treatment site, wherein the first selected number is different than the second selected number. - View Dependent Claims (23, 24, 25, 26, 27, 28)
-
Specification