Particle-removing medical device and method

• US 20040236369A1
• Filed: 06/14/2004
• Published: 11/25/2004
• Est. Priority Date: 04/27/1998
• Status: Active Grant

• Current Assignee: Ethicon Endo-Surgery, Inc. (Johnson & Johnson)
• Original Assignee: Artemis Medical, Inc. (Johnson & Johnson)
• Inventors: Dubrul, William R.
• Granted Patent: US 7,524,319 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2250/0067 Means for introducing or releasing pharmaceutical products into the body
• CPC Class Codes: A61L 2300/416 Anti-neoplastic or anti-proliferative or anti-restenosis or anti-angiogenic agents, e.g. paclitaxel, sirolimus
• CPC Class Codes: A61L 29/16 Biologically active materials, e.g. therapeutic substances A61L29/048 takes precedence
• CPC Class Codes: A61M 2025/0057 Catheters delivering medicament other than through a conventional lumen, e.g. porous walls or hydrogel coatings
• CPC Class Codes: A61M 2025/1052 for temporarily occluding a vessel for isolating a sector
• 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 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 25/1011 Multiple balloon catheters
• CPC Class Codes: A61M 25/104 used for angioplasty
• CPC Class Codes: A61N 1/306 Arrangements where at least part of the apparatus is introduced into the body
• CPC Class Codes: A61N 1/327 for enhancing the absorption properties of tissue, e.g. by electroporation

Abstract

A particle-removing medical device includes an outer, hollow tube having a tube distal end and a porous braided structure having a distal part and a proximal part. Structure, housed within the tube and having a distal end positioned distally of the tube distal end, is used to move the braided structure from a contracted condition to an expanded condition by moving the distal ends of the tube and the structure towards one another. The braided structure is constructed to inhibit particles from moving completely through the braided structure when in the expanded condition.

Claims

1. A medical device, for use in removing particles from a vascular lumen within the body for treatment of cardiovascular disease, comprising:

an outer, hollow tube having a tube distal end, the tube adapted for insertion into a vascular lumen;

a self-expanding porous braided structure having a distal part and a proximal part;

means, housed within the tube and having a distal end positioned distally of the tube distal end, for moving the braided structure from a contracted condition to an expanded condition by moving at least one of the tube and moving means distal ends towards the other; and

the porous braided structure comprising;

a porous proximal side and a porous distal side;

the distal side having smaller pores than the proximal side to inhibit particles from moving completely through the braided structure when in the expanded condition.

2. The device as in claim 1 further comprising a porous membrane adjacent to the braided structure, the membrane having smaller pores than the braided structure.

3. The device as in claim 2 wherein said porous membrane is an elastic membrane.

4. A medical device, for use in removing particles from a vascular lumen within the body for treatment of cardiovascular disease, comprising:

means for removing particles from a vascular lumen within the body comprising;

an outer, hollow tube having a tube distal end;

a porous braided structure having a distal part and a proximal part;

means, housed within the tube and having a distal end positioned distally of the tube distal end, for moving the braided structure from a contracted condition to an expanded condition by moving at least one of the tube and moving means distal ends towards the other;

the braided structure being a temperature-sensitive shape memory material so that the braided structure is also movable from a contracted condition to an expanded condition by heating the temperature-sensitive braided material; and

the braided structure comprising means for inhibiting particles from moving completely through the braided structure when in the expanded condition.

5. A medical device, for use in removing particles from a vascular lumen within the body for treatment of cardiovascular disease, comprising:

means for removing particles from a vascular lumen within the body comprising;

an outer, hollow tube having a tube distal end;

a porous braided structure having a porous proximal side, a porous distal side, a distal part and a proximal part;

means, housed within the tube and having a distal end positioned distally of the tube distal end, for moving the braided structure from a contracted condition to an expanded condition by moving at least one of the tube and moving means distal ends towards the other;

the braided structure being a temperature-sensitive shape memory material so that the braided structure is also movable from a contracted condition to an expanded condition by heating the temperature-sensitive braided material;

a porous elastic membrane in contact with the porous distal side of the braided structure, the membrane having smaller pores than the braided structure; and

the braided structure and porous membrane therewith adapted to inhibit particles from moving completely through the braided structure when in the expanded condition.

6. A method for removing particulates from a vascular lumen within the body for treatment of vascular disease, comprising:

placing a filter device at a chosen position within a vascular lumen;

fully occluding the vascular lumen at the chosen position by expanding a braided structure at the chosen position;

removing particulates from a portion of the vascular lumen on one side of the chosen position by introducing liquid into and removing liquid from said portion;

collapsing the braided structure; and

removing the filter device from the vascular lumen.

7. The method according to claim 6 wherein the placing step is a percutaneous placing step.

8. The method according to claim 6 wherein the expanding step is carried out using a braided structure mounted to first and second the elongate members.

9. The method according to claim 6 wherein the expanding step is carried out using a fully sealed braided structure.

10. The method according to claim 6 wherein the expanding step is carried out using a partially sealed braided structure.

11. The method according to claim 6 wherein the expanding step is carried out using a porous braided structure.

12. The method according to claim 6 wherein the removing step is carried out so that the portion is proximal of the braided structure.

13. A method for forming an occlusion system within a vascular lumen of a body to trap particles for treatment of cardiovascular disease comprising the following steps:

positioning the distal portion of a medical device at a target site within a vascular lumen of a body, the medial device comprising;

an outer, hollow tube having a tube distal end;

an inner member housed within the tube and having an inner member distal end positioned distally of the tube distal end; and

a self-expanding porous braided structure having a distal part secured to the inner member distal end and a proximal part secured to the tube distal end, the distal part having smaller pores than the proximal part to inhibit particles from moving completely through the braided structure when in the expanded condition;

moving the braided structure from a contracted condition to an expanded condition by moving the tube and inner member distal ends toward one another thereby at least substantially obstructing the lumen at the target site, the braided structure adapted to inhibit particles from moving completely through the braided structure when in the expanded condition.

14. A vascular prosthesis comprising:

a braided body;

said braided body having a variable porosity to allow for a variable obstruction to flow through the braided body according to the location along the braided body.

15. The prosthesis of claim 14 wherein the body is a balloon-expandable body.

16. The prosthesis of claim 14 wherein the body is a self-expanding body.

17. The prosthesis of claim 14 wherein the body is a self-expanding body and is also expandable to a desired size by an inflatable balloon.

18. The prosthesis of claim 14 wherein the material used to make the body is selected from the group consisting of tantalum, shape memory nickel-titanium alloy, wool, nylon, polyethylene, polyester, stainless steel alloy, titanium and PTFE.

19. The prosthesis of claim 14 wherein the body is coated with a textile fabric.

20. The prosthesis of claim 14 further comprising a drug associated with the body.

21. The prosthesis of claim 14 wherein said body comprises temporary energy dispersal means for helping prevent restenosis.