Distal protection device and method

• US 20020082639A1
• Filed: 02/22/2002
• Published: 06/27/2002
• Est. Priority Date: 03/06/1997
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Daniel, John M.K., Hektner, Thomas R., Broome, Thomas E.
• Granted Patent: US 6,974,469 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 2017/00539 hydraulically
• CPC Class Codes: A61B 2017/22038 with a guide wire
• CPC Class Codes: A61B 2017/22042 Details of the tip of the guide wire
• CPC Class Codes: A61B 2017/22049 Means for locking the guide wire in the catheter
• CPC Class Codes: A61B 2017/22061 for spreading elements apart
• CPC Class Codes: A61F 2/0105 Open ended, i.e. legs gathered only at one side
• CPC Class Codes: A61F 2/0108 Both ends closed, i.e. legs gathered at both ends
• 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 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2002/30092 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/0008 elliptical or oval
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61M 2025/09125 Device for locking a guide wire in a fixed position with respect to the catheter or the human body
• CPC Class Codes: A61M 2025/09183 having tools at the distal tip

Abstract

A device adapted for deployment in a body vessel for collecting floating debris and emboli in a filter. The device includes a collapsible proximally tapered frame for operably supporting the filter between a collapsed insertion profile and an expanded deployment profile. The tapered collapsible frame includes a mouth which is sized to extend to walls of the body vessel in the expanded deployed profile to seal the filter relative to the body vessel for collecting debris floating in the body vessel.

Claims

1. A device adapted for deployment in a body vessel, comprising:

a filter having a plurality of openings for fluid flow therethrough; and

a proximally-tapered collapsible frame coupled to the filter and operably coupled to a guidewire, said frame including an expandable mouth coupled to the filter and adapted to operate between an expanded profile and a collapsed profile, and longitudinal ribs having opposed first and second ends, said first ends being coupled to the guidewire, and said second ends being coupled to the mouth, said ribs being sloped outwardly in an expanded position to form the proximally tapered collapsible frame.

2. The device of claim 1 wherein the mouth is normally biased in the expanded profile.

3. The device of claim 2 wherein the mouth is formed of a resilient wire material.

4. The device of claim 1 wherein the mouth and ribs are integrally formed from a mesh sheet material.

5. The device of claim 1 wherein the filter has a distal end fixedly coupled to the guidewire.

6. The device of claim 1 wherein the filter is generally cone-shaped.

7. The device of claim 1 wherein mouth is formed of a pleated ring.

8. The device of claim 1 wherein ribs are fixedly secured to the guidewire.

9. The device of claim 1 and further comprising a collar slidably disposed over the guidewire and wherein the ribs are coupled to the collar, the guidewire extending through the mouth and along a length of the filter.

10. The device of claim 1 wherein the frame includes at least four ribs.

11. The device of claim 7 wherein the pleated ring includes at least four folds.

12. The device of claim 1 wherein the mouth and ribs are integrally formed.

15. The method of claim 14 wherein the guidewire is concurrently inserted with the device and sheath.

16. The method of claim 14 wherein the guidewire is inserted prior to insertion of the device, and the device is advanced over the guidewire for placement at the deployment site and is locked to the guidewire prior to withdrawal of the sheath.

19. The method of claim 18 wherein the device is fixedly coupled to a guidewire, and wherein positioning the sheath comprises:

proximally withdrawing the guidewire to collapse the device within the sheath.

20. The method of claim 18 wherein positioning the sheath comprises:

advancing the sheath over the sloped ribs to collapse the device.

21. The method of claim 18 and further comprising:

positioning at least a proximal mouth of the device within the sheath prior to withdrawing the sheath and device.

13. In combination:

a device adapted for deployment in a body vessel including;

a filter having a plurality of openings for fluid flow therethrough, said filter being adapted to be coupled to a wire for operation;

a proximally-tapered collapsible frame coupled to the filter and operably coupled to the core wire, said frame including an expandable mouth adapted to operate between an expanded profile and a collapsed profile, and sloped longitudinal ribs having opposed first and second ends, said first ends being coupled to the wire and said second ends being coupled to the mouth, said ribs being sloped outwardly in the expanded profile to form the proximally-tapered collapsible frame; and

a sheath formed of a tubular member sized for placement over the ribs to collapse the mouth and filter to the collapsed profile.

14. A method for deploying a device in a vessel for collecting debris, comprising the steps of:

providing a device coupled to a guidewire and movable relative thereto, having a filter and a frame for supporting the filter in a collapsed profile and an expanded deployed profile, said frame being normally biased in the expanded deployed profile;

providing an elongated sheath having proximal and distal ends and an inner lumen extending therethrough;

positioning the device in the lumen of the sheath to maintain the device in a collapsed profile;

inserting the sheath and device into a body lumen and advancing the distal end of the sheath to locate the device at a deployment site; and

proximally moving the sheath to withdraw the sheath while maintaining the position of the guidewire to remove the sheath from the device to expand the frame and filter.

17. A method for removing a deployed device, deployed in an expanded operating profile for collecting debris from a vessel, comprising the steps of:

providing the device with a proximally tapered collapsible frame for supporting a filter, said proximally tapered frame including a plurality longitudinally sloped ribs extending radially outwardly in a deployed profile;

providing an elongated sheath having proximal and distal ends and an inner lumen extending therethrough;

inserting the elongated sheath to align the distal end thereof with the longitudinally sloped ribs of the deployed device;

longitudinally sloped ribs of the deployed device;

positioning the sheath over the longitudinally sloped ribs to collapse the device; and

proximally withdrawing the sheath and device.