Multiple loop snare

Patent metadata

Field	Value
Publication number	US-8974470-B2
Application number	US-201213343570-A
Country	US
Kind code	B2
Filing date	Jan 4, 2012
Priority date	Jan 4, 2011
Publication date	Mar 10, 2015
Grant date	Mar 10, 2015

Abstract

A snare device having multiple loops is described. The loops may be configured having various sizes or shapes and may be configured for use within a single outer sheath. Each loop provided in connection with a single snare device may have a different size, shape, disposition, or orientation than other loops associated with the same snare device.

First claim

The invention claimed is:

1. A snare device comprising:
an outer sheath comprising a lumen and a tapered distal portion;
a first snare loop;
a second snare loop;
a first elongate shaft fixedly attached to each end of the first snare loop; and
a second elongate shaft fixedly attached to each end of the second snare loop;
wherein
the first snare loop and the second snare loop are configured to be disposed in a retracted configuration within the sheath lumen and a deployed configuration outside of the outer sheath;
the sheath lumen is sized and configured to interact with the first snare loop and the second snare loop as the first snare loop and the second snare loop are each retracted within the sheath lumen, such that a first retracted portion of the first loop is disposed adjacent a second retracted portion of the first loop and a first retracted portion of the second loop is disposed adjacent a second retracted portion of the second loop; and
the snare device is configured to allow the first snare loop to move independently of the second snare loop such that the first snare loop may move from a first position in which at least a portion of the first snare loop is disposed distal of an entirety of the second snare loop to a second position in which the first snare loop is disposed entirely proximal of the second snare loop.

2. The snare device of claim 1 , wherein the first snare loop and the second snare loop are configured to be simultaneously disposed within the sheath lumen.

3. The snare device of claim 1 , wherein the first snare loop and the second snare loop comprise different sizes of loops.

4. The snare device of claim 1 , wherein the first elongate shaft and the second elongate shaft are in direct communication with the outer sheath.

5. The snare device of claim 1 , wherein the first snare loop and second snare loop are independently retractable and deployable.

6. The snare device of claim 1 , wherein an inner diameter of the sheath lumen is less than an outer diameter of the first snare loop and the second snare loop when either the first snare loop or the second snare loop is in a deployed configuration.

7. The snare device of claim 1 , wherein the sheath lumen is configured to reduce an outer diameter of the first snare loop and the second snare loop when either the first snare loop or the second snare loop is retracted within the sheath lumen.

8. The snare device of claim 1 , further comprising a third snare loop.

9. A method of deploying a snare device, comprising:
obtaining a snare device comprising: an outer sheath comprising a lumen and a tapered distal portion, a first snare loop, a second snare loop;
wherein the first snare loop and the second snare loop are configured to be disposed in a retracted configuration, such that a first retracted portion of the first loop is disposed adjacent a second retracted portion of the first loop and a first retracted portion of the second loop is disposed adjacent a second retracted portion of the second loop, within the sheath lumen and a deployed configuration outside of the outer sheath;
wherein the first snare loop and the second snare loop comprise different sizes of loops;
inserting the snare device into a body lumen of a patient;
determining whether the first snare loop or second snare loop is best configured for a therapy to be performed; and
deploying either the first snare loop or the second snare loop as determined for the therapy.

10. The method of claim 9 , wherein one of the first or second snare loops is initially deployed to determine which snare loop is best configured for the therapy.

11. The method of claim 9 , wherein the first and second snare loops are selectively deployable.

12. The method of claim 9 , wherein deploying the snare loop comprises serially deploying the first and second snare loops.

13. The method of claim 9 , wherein:
the snare device further comprises a third snare loop with each end thereof fixedly attached to a third elongated shaft; and
determining whether the first snare loop or second snare loop is best configured for a therapy to be performed further comprises determining whether the third snare loop is best configured for the therapy.

14. A method of deploying a snare device, comprising:
obtaining a snare device comprising: an outer sheath comprising a lumen, a first snare loop, a second snare loop, a first elongate shaft fixedly attached to each end of the first snare loop, and a second elongate shaft fixedly attached to each end of the second snare loop;
wherein the first snare loop and the second snare loop are configured to be disposed in a retracted configuration within the sheath lumen and a deployed configuration outside of the outer sheath, and the first snare loop is configured to move independently of the second snare loop such the first snare loop may move from a first position in which at least a portion of the first snare loop is disposed distal of an entirety of the second snare loop to a second position in which the first snare loop is disposed entirely proximal of the second snare low;
inserting the snare device into a body lumen of a patient; and
deploying either the first snare loop or the second snare loop.

15. The method of claim 14 , wherein one of the first or second snare loops is initially deployed to determine which snare loop is best configured for the therapy.

16. The method of claim 14 , wherein the first snare loop and the second snare loop comprise different sizes of loops.

17. The method of claim 14 , wherein the snare device further comprises a third snare loop.

Assignees

• Lampropoulos Fred
• Mottola Jim
• Merit Medical Systems Inc

Inventors

• Lampropoulos Fred
• Mottola Jim

Classifications

• F04C2270/0421

  Controlled or regulated · CPC title

• A61B17/50

  Instruments {, other than pincettes or toothpicks,} for removing foreign bodies from the human body (surgical pincettes, i.e. surgical tweezers, A61B17/30) · 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

• A61B17/32056

  Surgical snare instruments (for removing or smashing calculi A61B2017/2212; tonsillotomes A61B17/26) · CPC title

• A61B2017/00358

  Snares for grasping · CPC title