Stent delivery system to improve placement accuracy for self-expanding stent

• US 20070179519A1
• Filed: 01/27/2006
• Published: 08/02/2007
• Est. Priority Date: 01/27/2006
• Status: Abandoned Application

• Current Assignee: Cardinal Health Switzerland 515 GmbH (Cardinal Health, Inc.)
• Original Assignee: Cardinal Health Switzerland 515 GmbH (Cardinal Health, Inc.)
• Inventors: Huisun, Wang
• Application Number:
  US11/343,258
• Publication Number:
  US 20070179519A1
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• 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 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/0008 elliptical or oval
• CPC Class Codes: A61F 2230/0067 conical

Abstract

The present invention is directed to a stent delivery system having an off center support member to prevent stent jumping during deployment, thereby improving placement accuracy.

Claims

1. A delivery device for delivering and deploying a medical device to a location in a patient'"'"'s body requiring medical treatment, such as a blood vessel, comprising:

an operable portion comprising controls for moving an outer sheath that retains a self expanding stent on an inner shaft, which inner shaft is coaxial with the sheath, a self-expanding stent retained on the inner shaft and retained within the outer sheath prior to stent deployment, an off center support member in engagement with the shaft that is disposed interior the outer sheath at a location distal to the stent, wherein said off center support member is comprised of a self expanding material and engaged to the shaft non coaxially, relative to the longitudinal axis of the shaft, wherein the off center support member is in an initial state of relative compression, and expands when a restraining force is removed, such that when the device is inserted in the patient'"'"'s body, the off center support member, when expanded, deploys against the vessel walls to displace the shaft into an off center arrangement prior to deployment of the stent.

2. The device of claim 1 wherein the off center support member is comprised of nitinol.

3. The device of claim 1 wherein the off center support member is comprised of spring tempered stainless steel.

4. The device of claim 1 wherein the off center support member is located distal to the stent and proximal to a distal end of the device.

5. The device of claim 1 wherein the off center support member is comprised of a vascular filter.

6. The device of claim 5 wherein the vascular filter is comprised of an expandable hoop that forms the mouth of a blood permeable sac that is engaged to the hoop.

7. The device of claim 1 further comprised of a guide wire that extends through a central lumen of the device.

8. A delivery device for delivering and deploying a medical device to a location in a patient'"'"'s body requiring medical treatment, such as a blood vessel, comprising:

an operable portion comprising controls for moving an outer sheath that retains a self expanding stent on an inner shaft, which inner shaft is coaxial with the sheath, a self-expanding stent retained on the inner shaft and retained within the outer sheath prior to stent deployment, an off center support member in engagement with a guide wire passing through a central lumen in the device, the off center support member being positioned at allocation distal to the stent, wherein said off center support member is comprised of a self expanding material and engaged to the guide wire non coaxially, relative to the longitudinal axis of the shaft, wherein the off center support member is in an initial state of relative compression, and expands when a restraining force is removed, such that when the device is inserted in the patient'"'"'s body, the off center support member, when expanded, deploys against the vessel walls to displace the shaft into an off center arrangement prior to deployment of the stent.

9. The device of claim 8 wherein the off center support member is comprised of nitinol.

10. The device of claim 8 wherein the off center support member is comprised of spring tempered stainless steel.

11. The device of claim 8 wherein the off center support member is located distal to the stent and proximal to a distal end of the device.

12. The device of claim 8 wherein the off center support member is comprised of a vascular filter.

13. The device of claim 12 wherein the vascular filter is comprised of an expandable hoop that forms the mouth of a blood permeable sac, which is engaged to the hoop.