Foreign body retrieval devices

• US 20050209609A1
• Filed: 02/23/2005
• Published: 09/22/2005
• Est. Priority Date: 02/24/2004
• Status: Abandoned Application

• Current Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Original Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Inventors: Wallace, Michael J.
• Application Number:
  US11/064,062
• Publication Number:
  US 20050209609A1
• Time in Patent Office: Days
• US Class Current: 606/113
• 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 17/50 Instruments, other than pincettes or toothpicks, for removing foreign bodies from the human body locating otherwise A61B5/06; locating by radiation A61B6/00; removing calculi A61B17/22; from the eyes A61F9/00709
• CPC Class Codes: A61B 2017/00349 Needle-like instruments having hook or barb-like gripping means, e.g. for grasping suture or tissue A61B17/06066 takes precedence
• CPC Class Codes: A61B 2017/22035 for retrieving or repositioning foreign objects
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61B 2017/2215 having an open distal end

Abstract

Foreign body retrieval devices suited for initially engaging a foreign body at any location along the length of the foreign body. In one embodiment, a foreign body retrieval device that includes a retriever having a hook at one end; and a snare having an element that is configured to substantially surround, and that substantially surrounds, a portion of the hook when the snare and the retriever are used together to capture a foreign body. In another embodiment, a foreign body retrieval device that includes a retriever having a closed-arm hook at one end; and a snare having an element that is configured to engage the closed-arm hook. Other embodiments are included.

Claims

1. A foreign body retrieval device comprising:

a retriever having a hook at one end; and

a snare having an element that is configured to substantially surround, and that substantially surrounds, a portion of the hook when the snare and the retriever are used together to capture a foreign body.

2. The foreign body retrieval device of claim 1, where the retriever has a retriever shaft and a retriever shaft surface, the snare has a snare shaft and a snare shaft surface, and the retriever shaft surface is configured to mate with the snare shaft surface.

3. The foreign body retrieval device of claim 1, where the snare has a snare shaft, and the snare shaft has a proximal end and a bend located between the hook and the proximal end.

4. The foreign body retrieval device of claim 1, where the hook has a main hook portion and a reverse hook tip portion.

5. The foreign body retrieval device of claim 1, where the retriever has a retriever shaft that is substantially straight.

6. The foreign body retrieval device of claim 1, where the retriever has a retriever shaft with a substantially straight portion.

7. The foreign body retrieval device of claim 6, where the retriever shaft includes a bent portion that links the hook to the substantially straight portion.

8. The foreign body retrieval device of claim 1, where the snare includes a snare shaft and a V-shaped portion that links the element to the snare shaft.

9. The foreign body retrieval device of claim 1, where the element is a loop.

10. The foreign body retrieval device of claim 1, where the retriever has a retriever shaft, and the hook includes a flared portion that extends progressively farther from the retriever shaft moving toward the one end.

11. The foreign body retrieval device of claim 1, where the retriever is made of a nickel-titanium alloy.

12. The foreign body retrieval device of claim 1, where the snare is made of a nickel-titanium alloy.

13. A foreign body retrieval device comprising:

a retriever having a closed-arm hook at one end; and

a snare having an element that is configured to engage the closed-arm hook.

14. The foreign body retrieval device of claim 13, where the retriever has a retriever shaft and a retriever shaft surface, the snare has a snare shaft and a snare shaft surface, and the retriever shaft surface is configured to mate with the snare shaft surface.

15. The foreign body retrieval device of claim 13, where the snare has a snare shaft, and the snare shaft has a proximal end and a bend located between the hook and the proximal end.

16. The foreign body retrieval device of claim 13, where the closed-arm hook has a main hook portion and a reverse hook tip portion.

17. The foreign body retrieval device of claim 13, where the retriever has a retriever shaft with a substantially straight portion.

18. The foreign body retrieval device of claim 17, where the retriever shaft includes a bent portion that links the closed-arm hook to the substantially straight portion.

19. A foreign body retrieval device comprising:

a catheter having a passageway system;

a retriever slidably positionable in the passageway system, the retriever having a hook at one end; and

a snare slidably positionable in the passageway system, the snare having an element that is configured to substantially surround, and that substantially surrounds, a portion of the hook when both the element and the hook are positioned outside of the passageway system.

20. A foreign body retrieval device comprising:

a catheter having a passageway system;

a retriever slidably positionable in the passageway system, the retriever having a closed-arm hook at one end; and

a snare slidably positionable in the passageway system, the snare having an element that is configured to engage the closed-arm hook.