Expandable retrieval device

• US 7,998,163 B2
• Filed: 10/02/2003
• Issued: 08/16/2011
• Est. Priority Date: 10/03/2002
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Schultz, Michael, Laduca, Paul, Broome, Thomas E., Salahieh, Amr
• Primary Examiner(s): TYSON, MELANIE RUANO
• Application Number:
  US10/677,716
• Publication Number:
  US 20040127936A1
• Time in Patent Office: 2,875 Days
• Field of Search: 606/200, 606/114, 606/113, 606/117, 623/1.11, 623/23.72, 604/103.05, 604/103.06, 604/103.09
• US Class Current: 606/200
• 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 17/221 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 2017/2212 having a closed distal end, e.g. a loop

Abstract

A device for retrieving an intravascular device from a body lumen is disclosed. A retrieval device in accordance with an exemplary embodiment of the present invention includes a braided member coupled to an elongated shaft member. The braided member may include a number of filaments defining a radially expandable inner lumen configured to receive and encapsulate the intravascular device therein. An elastomeric jacket disposed about at least a portion of the braided member may encase the filaments.

Claims

1. A medical device for retrieving an intravascular device from a body lumen, comprising:

an elongated shaft member having a proximal section and a flared distal section; and

a braided member having a proximal portion and a distal portion, the proximal portion of the braided member extending proximally of a distal end of the elongated shaft member and coupled to the flared distal section of the elongated shaft member, and the distal portion of the braided member extending distally of the distal end of the elongated shaft member, the braided member including a plurality of filaments and defining a radially expandable inner lumen configured to receive and encapsulate the intravascular device therein;

wherein said plurality of filaments are configured to radially expand when axially compressed;

wherein at least part of the proximal portion of the braided member is encased within a wall of the flared distal section;

wherein the medical device is adapted to retrieve an embolic protection filter including a filter membrane coupled to a proximal support hoop, the support hoop defining a proximally facing opening of the embolic protection filter, the embolic protection filter having a first position, wherein the proximally facing opening is distal of the braided member, and a second position, wherein the proximally facing opening is within at least a portion of the radially expandable inner lumen of the braided member.

2. The medical device of claim 1, wherein the elongated shaft member includes polyether block amide.

3. The medical device of claim 1, wherein said plurality of filaments are arranged in two sets of parallel helices wound in opposite directions about a common longitudinal axis.

4. The medical device of claim 1, wherein said plurality of filaments comprise multi-filar threads.

5. The medical device of claim 1, wherein said plurality of filaments comprise a composite material.

6. The medical device of claim 5, wherein said composite material includes a radiopaque material.

7. The medical device of claim 1, wherein said plurality of filaments comprise a polymeric material.

8. The medical device of claim 1, wherein said plurality of filaments comprise a metal.

9. The medical device of claim 1, further comprising an elastomeric jacket encasing at least part of said braided member.

10. The medical device of claim 9, wherein said elastomeric jacket includes silicone.

11. The medical device of claim 9, wherein said elastomeric jacket includes urethane.

12. The medical device of claim 9, wherein said elastomeric jacket includes a radiopaque material.

13. A medical device for retrieving an intravascular device from a body lumen, comprising:

an elongated shaft member having a proximal section and a flared distal section;

a braided member having a proximal portion and a distal portion, the proximal portion of the braided member extending proximally of a distal end of the elongated shaft member and coupled to the flared distal section of the elongated shaft member, and the distal portion of the braided member extending distally of the distal end of the elongated shaft member, the braided member including plurality of filaments and defining a radially expandable inner lumen configured to receive and encapsulate the intravascular device therein; and

an elastomeric jacket encasing at least part of said braided member;

wherein at least part of the proximal portion of the braided member is integrally formed with the elongated shaft member such that the at least part of the proximal portion is encased within a wall of the flared distal section;

wherein the medical device is adapted to retrieve an embolic protection filter including a filter membrane coupled to a proximal support hoop, the support hoop defining a proximally facing opening of the embolic protection filter, the embolic protection filter having a first position, wherein the proximally facing opening is distal of the braided member, and a second position, wherein the proximally facing opening is within at least a portion of the radially expandable inner lumen of the braided member.

14. The medical device of claim 13, wherein the elongated shaft member includes polyether block amide.

15. The medical device of claim 13, wherein said plurality of filaments are arranged in two sets of parallel helices wound in opposite directions about a common longitudinal axis.

16. The medical device of claim 13, wherein said plurality of filaments are configured to radially expand when axially compressed.

17. The medical device of claim 13, wherein said plurality of filaments comprise multi-filar threads.

18. The medical device of claim 13, wherein said plurality of filaments comprise a composite material.

19. The medical device of claim 18, wherein said composite material includes a radiopaque material.

20. The medical device of claim 13, wherein said plurality of filaments comprise a polymeric material.

21. The medical device of claim 13, wherein said plurality of filaments comprise a metal.

22. The medical device of claim 13, wherein said elastomeric jacket includes silicone.

23. The medical device of claim 13, wherein said elastomeric jacket includes urethane.

24. The medical device of claim 13, wherein said elastomeric jacket includes a radiopaque material.

25. A medical device for retrieving an intravascular device from a body lumen, comprising:

an elongated shaft member having a proximal section and a flared distal section;

a braided member having a proximal portion and a distal portion, the proximal portion of the braided member extending proximally of a distal end of the elongated shaft member and fixedly coupled to the flared distal section of the elongated shaft member, and the distal portion of the braided member extending distally of the distal end of the elongated shaft member, the braided member including plurality of filaments arranged in two sets of parallel helices wound in opposite directions about a common longitudinal axis and defining a radially expandable inner lumen configured to receive and encapsulate the intravascular device therein;

wherein at least part of the proximal portion of the braided member is integrally formed with the elongated shaft member such that the at least part of the proximal portion is encased within a wall of the flared distal section; and

an elastomeric jacket encasing at least part of said braided member, the elastomeric jacket disposed adjacent and flush with the flared distal section of the elongated shaft member, wherein the elastomeric jacket has a thickness generally equivalent to that of the flared distal section of the elongated shaft member;

wherein the plurality of filaments are configured to radially expand when axially compressed;

wherein the medical device is adapted to retrieve an embolic protection filter including a filter membrane coupled to a proximal support hoop, the support hoop defining a proximally facing opening of the embolic protection filter, the embolic protection filter having a first position, wherein the proximally facing opening is distal of the braided member, and a second position, wherein the proximally facing opening is within at least a portion of the radially expandable inner lumen of the braided member.