Retrieval device

• US 20050267489A1
• Filed: 05/25/2005
• Published: 12/01/2005
• Est. Priority Date: 05/25/2004
• Status: Active Grant

• Current Assignee: US Endoscopy Group Inc. (Steris Corporation)
• Original Assignee: US Endoscopy Group Inc. (Steris Corporation)
• Inventors: Kaye, Christopher J., Secrest, Dean J., John, K. Randall
• Granted Patent: US 8,057,484 B2
• Time in Patent Office: Days
• US Class Current: 606/113
• 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

An endoscopic surgical device for retrieving objects, such as for example, severed human tissue, foreign objects or impacted food bolus, from within a subject is disclosed. The device includes a body and handle movable relative to the body, a tubular member fixed to the body, a link having a first end fixed to the handle and a second end remote from the body, and a net including a loop and a net element. The loop is expandable and collapsible by action of the handle relative to the body. The loop retains an expanded configuration when deployed to allow for the capture certain objects that were otherwise difficult to capture because of positioning, location, or object characteristics. The loop may be constructed of flat wire and form a polygon shape when deployed. Structure at the distal end of the loop may propel and retain the loop into an open position when in use in narrow organs such as the esophagus.

Claims

1. A device for use within an instrument channel of an endoscope for retrieving objects from within a human body, the device comprising:

a. a body;

b. a handle mounted to and movable relative to said body;

c. a tubular member having a first end fixed to said body and a second end, the tubular member defining a passage and opening at said second end;

d. a link having a first end fixed to said handle and a second end remote from said body, said link extending substantially through said tubular member passage; and

e. a net comprising a loop and a net element secured to said loop and having an object receiving pouch section, said net disposed adjacent said link second end for deployment and retrieval through said tubular passage opening;

f. said loop being expandable and collapsible by action of said handle relative to said body, wherein a distal end of said loop comprises collapse-resistant structure.

2. The device of claim 1 wherein said loop is constructed from a flat wire.

3. The device of claim 1 wherein said loop is constructed from a material having a tensile strength of at least 300,000 psi.

4. The device of claim 1 wherein said loop is constructed from a flat wire comprising at least one collapse-resistant bend.

5. The device of claim 1 wherein said loop forms a polygon shape when deployed.

6. The device of claim 1 wherein said loop comprises a full looped portion disposed at said distal end of said loop.

7. The device of claim 1 wherein said loop comprises a full looped portion disposed at said distal end of said loop, wherein said net is anchored to said curved portion.

8. The device of claim 1 wherein said loop comprises a protruding spring tip, said tip disposed at said distal end of said loop.

9. The device of claim 1 wherein said net comprises a plastic tip having a aperture therethrough, wherein said net element is secured through said aperture.

10. The device of claim 1 wherein said loop comprises a tip member having a aperture therethrough, wherein said net element is secured through said aperture.

11. The device of claim 1 wherein said loop retains an expanded configuration with an object retained within said pouch section.

12. An endoscopic device for retrieving an object from within a patient'"'"'s body, the device comprising:

a. a support unit comprising;

i. a body; and

ii. an elongated introducer member having a first end section proximal and fixed with respect to said body and a second end section remote from the body, the introducer member defining a passage and opening at said second end section; and

b. a tissue retrieving net system comprising;

i. a net comprising a wire-like resilient loop and a net element having a mouth section slidably disposed on the loop and a tissue receiving pouch section, said net disposed adjacent said introducer member second end for deployment and retrieval through said introducer passage opening;

ii. a net deployment and retrieval assembly extending substantially through said introducer passage and connected to the net, said assembly comprising a motion transmitting link extending in said introducer passage to said loop; and

iii. a net actuator unit comprising a handle fixed with respect to said motion transmitting link and movable relative to said body so that shifting said handle relative to said body shifts said net into and out of said introducer passage opening;

c. said introducer member passage having an internal diameter substantially smaller than the width of said loop when said loop is deployed, said introducer member engaging said loop at said opening and resiliently collapsing and elongating said loop as said net is retrieved and moves into said introducer member passage, said loop resiliently returning to an uncollapsed configuration as it is deployed;

d. said net system further comprising a net controller for assuring that said net mouth extends fully about said loop when said loop is deployed, said controller comprising a net tether anchored at a distal end of said loop;

e. wherein a distal end of said loop comprises collapse-resistant structure.

13. The device of claim 12 wherein said loop is constructed from a flat wire.

14. The device of claim 12 wherein said loop is constructed from a stranded wire.

15. The device of claim 12 wherein said loop comprises a portion of flat wire and a portion of stranded wire.

16. The device of claim 12 wherein said loop comprises a plurality of wires constructed from a plurality of materials, each of said materials having different physical characteristics.

17. The device of claim 12 wherein said loop is constructed from a material having a tensile strength greater than 300,000 psi.

18. The device of claim 12 wherein said loop is constructed from a flat wire comprising at least one collapse-resistant bend.

19. The device of claim 12 wherein said loop forms a polygon shape when deployed.

20. The device of claim 12 wherein said loop comprises a full looped portion disposed at said distal end of said loop.

21. The device of claim 12 wherein said loop comprises a full looped portion disposed at said distal end of said loop, wherein said net is anchored to said curved portion

22. The device of claim 12 wherein said loop comprises a protruding spring tip, said tip disposed at said distal end of said loop.

23. The device of claim 12 wherein said net comprises a tip member having a aperture therethrough, wherein said net element is secured through said aperture.

24. The device of claim 12 wherein said loop comprises a plastic tip having a aperture therethrough, wherein said net element is secured through said aperture.

25. The device of claim 12 wherein said loop retains an expanded configuration when an object is disposed within said pouch section.

26. An endoscopic device for retrieving objects from within a human body, the device comprising:

a. a support assembly comprising a base and an elongated hollow tube;

b. a transmitting assembly comprising a handle movable relative to said base and a link having a first end fixed to said handle and a second end remote from said base, said link extending substantially through a length of said tube; and

c. a net comprising a loop and a net element secured to said loop, said loop being movable between an expanded position and a collapsed position by action of said handle relative to said base;

d. wherein said loop is polygon shaped in said expanded position and comprises a torsion spring tip at a distal end thereof.