Stent delivery catheter

• US 7,981,148 B2
• Filed: 01/30/2008
• Issued: 07/19/2011
• Est. Priority Date: 05/16/2007
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Aguilar, Amiel, Griffin, Stephen
• Primary Examiner(s): Nguyen; Anhtuan T
• Assistant Examiner(s): SHI, KATHERINE MENGLIN
• Application Number:
  US12/022,280
• Publication Number:
  US 20080294231A1
• Time in Patent Office: 1,266 Days
• Field of Search: 623/1.11, 623/1.12, 623/1.23, 606/108
• US Class Current: 623/1.11
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61F 2002/9665 with additional retaining means

Abstract

Stent delivery catheters comprising a hypotube, which may be a micromachined member, disposed on an outer portion of an inner member that may be an extruded multi-lumen member. The hypotube may be secured to the inner member. The devices may be adapted for delivering a self expanding stent by providing a restraining structure or device over the stent during delivery. One or more actuating members are provided through a lumen in the inner member to actuate the restraining structure and release the stent. Methods of use of such catheters are also described.

Claims

1. A catheter adapted for delivering a stent or stent-graft, the catheter comprising:

an inner member defining at least a guidewire lumen and one or more ancillary lumens, the inner member including proximal and distal ends;

one or more actuating members extending in the ancillary lumens;

a micro-machined hypotube having a plurality of openings defined therethrough disposed on the outside of the inner member and secured thereto;

a stent releasably secured near the distal end of the inner member; and

a retaining member having at least a first state and a second state,

wherein in the first state at least a portion of the retaining member is in direct contact with the stent,

in the second state at least a portion of the retaining member is underneath the hypotube,

the retaining member coupled to at least one of the one or more actuating members allowing a user, from a proximal end, to actuate the retaining member between the first state and the second state and release the stent.

2. The catheter of claim 1, wherein the hypotube is secured to the inner member at a plurality of locations along the length thereof.

3. The catheter of claim 1, wherein at least part of the inner member extends within the hypotube and includes a first region having a relatively smaller diameter and a second region having a relatively greater diameter, the hypotube being secured to the second region.

4. The catheter of claim 1, wherein the hypotube is secured to the inner member near the distal end thereof.

5. The catheter of claim 1, wherein:

the inner member includes a receiving portion for receiving a stent thereon; and

the catheter includes one or more receiving locations for receiving distal ends of at least one of the one or more actuating members, such that when a stent is disposed in the receiving portion, at least one actuating member extends thereover to a receiving location where the actuating member is removably received.

6. The catheter of claim 1, the retaining member comprising a sheath adapted to be moveably disposed over the stent to releasably retain it at a location relative the inner member, wherein at least one of the one or more actuating members is secured to the sheath.

7. The catheter of claim 6, wherein the inner member includes a proximal reduced outer diameter portion adjacent a distal reduced outer diameter portion such that the proximal reduced outer diameter portion extends beneath the hypotube, the sheath being moveable between a position over the distal reduced outer diameter portion and the proximal reduced outer diameter portion to allow a stent releasably retained on the distal reduced outer diameter portion to be released therefrom.

8. The catheter of claim 6, wherein the sheath is disposed distally of the hypotube in both an extended position for restraining the stent and a retracted portion for releasing the stent.

9. A catheter adapted for delivering a stent or stent-graft, the catheter comprising:

an inner member defining at least a guidewire lumen and one or more ancillary lumens, the inner member including proximal and distal ends;

one or more actuating members extending in one or more ancillary lumens;

a hypotube disposed on the outside of the inner member and secured thereto;

a stent; and

a sheath for releasably retaining a stent on the distal end of the inner member, having at least a first state and a second state,

wherein in the first state at least a portion of the sheath is in direct contact with the stent, in the second state at least a portion of the sheath is underneath the hypotube, the sheath for releasably retaining a stent being coupled to at least one of the one or more actuating members allowing a user, from a proximal end, to actuate the sheath for releasably retaining a stent.

10. The catheter of claim 9, wherein the hypotube comprises a micromachined hypotube including a plurality of openings defined therethrough.