Stent removal from a body

• US 20070027520A1
• Filed: 07/27/2005
• Published: 02/01/2007
• Est. Priority Date: 07/27/2005
• Status: Active Grant

• Current Assignee: AngioDynamics, Inc.
• Original Assignee: Paul Sherburne
• Inventors: Sherburne, Paul
• Granted Patent: US 8,038,704 B2
• Time in Patent Office: Days
• US Class Current: 623/1.110
• CPC Class Codes: A61B 17/22 Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for dilators A61M29/00
• CPC Class Codes: A61B 17/22031 Gripping instruments, e.g. forceps, for removing or smashing calculi A61B17/221 takes precedence
• CPC Class Codes: A61B 17/22032 having inflatable gripping elements balloon catheters A61M25/10
• CPC Class Codes: A61B 2017/22035 for retrieving or repositioning foreign objects
• CPC Class Codes: A61B 2017/22051 with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation A61B2017/22048, A61B2017/3486 take precedence
• CPC Class Codes: A61B 2017/22079 with suction of debris
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/9528 for retrieval of stents
• CPC Class Codes: A61F 2002/9534 for repositioning of stents
• CPC Class Codes: A61M 2025/1031 Surface processing of balloon members, e.g. coating or deposition; Mounting additional parts onto the balloon member's surface
• CPC Class Codes: A61M 2025/1081 having sheaths or the like for covering the balloon but not forming a permanent part of the balloon, e.g. retractable, dissolvable or tearable sheaths
• CPC Class Codes: A61M 2025/1084 having features for increasing the shape stability, the reproducibility or for limiting expansion, e.g. containments, wrapped around fibres, yarns or strands
• CPC Class Codes: A61M 25/10 Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00
• CPC Class Codes: A61M 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence
• CPC Class Codes: A61M 25/1027 Making of balloon catheters
• CPC Class Codes: A61M 25/1034 Joining of shaft and balloon

Abstract

This disclosure contains methods, devices, and systems for object removal from a body, including removal of a stent from a body. Methods of the present disclosure include inflating a balloon on a catheter, engaging a stent with a socket defined by a surface of the balloon, the surface inwardly sloped toward a lumen of the catheter, and retracting a portion of the stent through the socket and into the lumen. The present disclosure also includes methods for making a catheter, including forming a balloon, inverting a portion of the balloon, and attaching the balloon to a catheter such that a surface of the balloon defines a socket that is inwardly sloped toward a lumen of the catheter.

Claims

1. A method for capturing a stent, comprising:

inflating a balloon on a catheter;

engaging a stent with a socket defined by a surface of the balloon, the surface inwardly sloped toward a lumen of the catheter; and

retracting a portion of the stent through the socket and into the lumen.

2. The method of claim 1, wherein the retracting includes:

attaching an attachment tool to the stent; and

pulling the stent through the socket using the attachment tool.

3. The method of claim 2, wherein retracting the stent includes reducing a profile of the stent as the stent is pulled through the socket.

4. The method of claim 3, wherein the method includes expanding an inner diameter of an anatomical pathway with an outer surface of the balloon.

5. A method for making a catheter, comprising:

forming a balloon;

inverting a portion of the balloon; and

attaching the balloon to a catheter such that a surface of the balloon defines a socket that is inwardly sloped toward a lumen of the catheter.

6. The method of claim 5, wherein the method includes inverting the portion of the balloon before the balloon is attached to the catheter.

7. The method of claim 5, wherein the method includes attaching a first tail of the balloon to the catheter, then inverting a portion of the balloon, and then attaching a second tail of the balloon to the catheter.

8. The method of claim 5, wherein attaching the balloon includes attaching an outer surface of a first tail of the balloon to the catheter and attaching an inner surface of a second tail of the balloon to the catheter.

9. The method of claim 5, wherein the method of attaching the balloon includes configuring the balloon such that the socket is conically shaped and the surface transitions from an annularly shaped distal lip of the balloon to a distal opening of the lumen.

10. The method of claim 9, wherein forming the balloon includes forming the balloon from a non-compliant polymeric material.

11. A stent retrieval catheter, comprising:

a shaft with a lumen; and

a balloon connected to the shaft wherein a surface of the balloon defines a socket inwardly sloped toward the lumen.

12. The catheter of claim 11, wherein the surface defining the socket includes a section where the surface is substantially linear.

13. The catheter of claim 12, wherein the socket is conically shaped.

14. The catheter of claim 11, wherein the socket is conically shaped and the surface transitions from an annularly shaped distal lip of the balloon to the lumen.

15. The catheter of claim 11, wherein the socket is conically shaped and the surface transitions from an annularly shaped distal lip of the balloon to a distal end of the shaft.

16. The catheter of claim 15, wherein the annularly shaped distal lip of the balloon is distal relative to the distal end of the catheter shaft when the balloon is inflated.

17. The catheter of claim 16, wherein the annularly shaped distal lip of the balloon is larger in a diameter than an outer diameter of the distal end of the shaft.

18. The system of claim 17, wherein a portion of the balloon is inverted.

19. The device of claim 11, wherein the balloon includes a non-compliant polymeric material.

20. The device of claim 11, including means to draw a stent through the socket and into the lumen.