Retrieval apparatus and methods for use

Patent metadata

Field	Value
Publication number	US-9492263-B2
Application number	US-74692008-A
Country	US
Kind code	B2
Filing date	Dec 10, 2008
Priority date	Dec 10, 2007
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

An apparatus for capturing material within a body lumen includes a shaft carrying an expandable basket device on a distal end thereof. The basket device includes a distal basket carried and a proximal basket carried on the shaft such that the proximal basket is proximal to and spaced apart from the distal basket. Each basket includes an open end communicating with an interior of the respective basket and oriented towards one another. In one embodiment, a tubular middle portion extends between the baskets. In another embodiment, the distal basket includes an actuator coupled to the distal basket open end such that movement of the baskets towards one another causes the actuator to direct the distal basket open end inwardly to allow the open end to be received within the proximal basket to facilitate removal of the apparatus after capturing material within the baskets.

First claim

We claim:

1. An apparatus for retrieving material within a body lumen, the apparatus comprising:
an elongate cylindrical member including a proximal end, a distal end sized for introduction into a body lumen, the elongate cylindrical member defining an elongate cylindrical member lumen extending between the proximal end and the distal end of the elongate cylindrical member;
a wire configured to be received within the elongate cylindrical member lumen, the wire including a proximal end and a distal end extending distally beyond the distal end of the elongate cylindrical member;
a distal basket directly connected to the wire proximal to the distal end of the wire;
a proximal basket connected to the distal end of the elongate cylindrical member proximal to and spaced apart from the distal basket;
a middle mesh portion extending between the distal basket and the proximal basket; and
a tubular member comprising a proximal end and a distal end sized for introduction into the body lumen, the tubular member defining a tubular member lumen extending between the proximal end and the distal end of the tubular member, the tubular member lumen receiving the elongate cylindrical member, wherein:
the proximal and distal baskets are expandable from a contracted condition when disposed within the tubular member lumen to an expanded condition sized for capturing material within the proximal and distal baskets,
the distal basket and the proximal basket each comprise an open end oriented towards one another, a circumferential wall, and a closed end opposite the open end,
at least one of the baskets in the expanded condition is configured to be movable towards the other when the elongate cylindrical member or wire is moved relative to the other for substantially enclosing and capturing material within interiors of the baskets in the expanded condition,
the baskets are biased to resiliently expand to the expanded condition upon being deployed, and
the baskets and the middle mesh portion each have a tubular mesh structure.

2. The apparatus of claim 1 , wherein the middle mesh portion has a cross-section that is smaller than a cross-section of the proximal basket or the distal basket in the expanded condition.

3. The apparatus of claim 1 , wherein the middle mesh portion is coupled to the proximal and distal baskets by a plurality of struts.

4. The apparatus of claim 3 , wherein the struts are coupled to the open ends of the proximal and distal baskets.

5. The apparatus of claim 1 , wherein the open ends of the proximal and distal baskets comprise a zigzag pattern extending around a perimeter of the open ends, the zigzag patterns of the open ends being out of phase with one another such that the open ends may at least partially intertwine with one another to substantially enclose the interiors of the baskets.

6. The apparatus of claim 1 , further comprising a sheath, the sheath including a proximal end and a distal end sized for introduction into the body lumen, the sheath defining a sheath lumen extending between the proximal end and the distal end of the sheath, wherein the elongate cylindrical member is configured to be delivered through the sheath lumen in the body lumen.

7. The apparatus of claim 1 , wherein the distal end of the wire is atraumatic.

8. The apparatus of claim 1 , wherein the wire is moved proximally relative to the elongate cylindrical member to move the distal basket towards the proximal basket.

9. The apparatus of claim 1 , wherein the elongate cylindrical member is moved distally relative to the wire to move the proximal basket towards the distal basket.

10. The apparatus of claim 1 , wherein the middle mesh portion is axially compressible when at least one of the baskets is moved towards the other.

11. The apparatus of claim 1 , wherein the wire defines one or more wire lumens.

12. The apparatus of claim 11 , further comprising an expandable member on a distal end of the wire, wherein one of the wire lumens in an inflation lumen in fluid communication with an interior of the expandable member.

13. A method for removing a material within a body lumen of a patient, the method comprising:
introducing a basket device into the body lumen in a contracted condition, the basket device comprising:
a proximal basket and a distal basket spaced apart from one another, each basket comprising an open end oriented towards one another, and each basket comprising a circumferential wall and a closed end opposite the open end, and
a middle mesh portion extending between the distal basket and the proximal basket, the baskets and the middle mesh portion being formed from a tubular mesh structure;

deploying the distal basket such that the distal basket resiliently expands within the body lumen and the open end of the distal basket is disposed distal to the material to be removed;
deploying the mesh middle portion;
deploying the proximal basket such that the proximal basket resiliently expands within the body lumen and the open end of the proximal basket is disposed proximal to the material to be removed;
directing at least one of the proximal and distal baskets towards the other to capture the material through the open ends into interiors of the proximal and distal baskets; and
removing the basket device capturing the material from the body lumen,
wherein the mesh middle portion is substantially flexible such that the mesh middle portion is compressed axially when at least one of the proximal and distal baskets is moved toward the other for capturing material within the interiors of the baskets.

14. The method of claim 13 , wherein the body lumen comprises a blood vessel.

15. The method of claim 13 , wherein the body lumen comprises an aorto-venous fistula.

16. The method of claim 13 , wherein the body lumen comprises a tubular graft.

17. The method of claim 16 , wherein the tubular graft comprises one of a tubular xenograft and a synthetic tubular graft.

18. The method of claim 13 , wherein the body lumen comprises a peripheral vessel in a leg of the patient.

19. The method of claim 13 , wherein the body lumen comprises a cerebral vessel.

20. The method of claim 13 , wherein the body lumen is within the urinary tract of the patient.

21. The method of claim 20 , wherein the material comprises a stone.

22. The method of claim 13 , wherein the material comprises thrombus.

23. The method of claim 13 , wherein the material comprises a foreign body.

Assignees

• Krolik Jeffrey A
• Dreher James H
• Watanabe Gwendolyn
• Incept Llc

Inventors

• Krolik Jeffrey A
• Dreher James H
• Watanabe Gwendolyn

Classifications

• A61F2230/0069

  cylindrical · CPC title

• A61F2002/018

  made from tubes or sheets of material, e.g. by etching or laser-cutting · CPC title

• A61B17/221 Primary

  Gripping devices in the form of loops or baskets {for gripping calculi or similar types of obstructions (surgical snare instruments A61B17/32056)} · CPC title

• A61B2017/22038

  with a guide wire · CPC title

• A61B2017/22035

  for retrieving or repositioning foreign objects · CPC title