Endoscopic Stone-Extraction Device

• US 20140364868A1
• Filed: 08/09/2013
• Published: 12/11/2014
• Est. Priority Date: 06/11/2013
• Status: Active Grant

• Current Assignee: Innon Holdings, LLC
• Original Assignee: Innon Holdings, LLC
• Inventors: Dhindsa, Avtar S.
• Granted Patent: US 9,867,630 B2
• Time in Patent Office: Days
• US Class Current: 606/127
• 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 18/245 for removing obstructions in blood vessels or calculi
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61B 2018/00517 Urinary bladder or urethra

Abstract

An endoscopic stone-extraction device is provided comprising a support filament comprising an end portion having a plurality of stacked loops, a sheath comprising a lumen, wherein the support filament is disposed in the lumen such that the sheath is slideable with respect to the support filament, and a handle comprising an actuator. Movement of the actuator in a first direction retracts the sheath and causes the plurality of stacked loops to expand outside the lumen in an arc-like shape. Movement of the actuator in a second direction advances the sheath and causes the plurality of stacked loops to at least partially collapse inside the lumen. Other embodiments are provides, and any of these embodiments can be used alone or in combination.

Claims

1. An endoscopic stone-extraction device comprising:

a support filament comprising an end portion having a plurality of stacked loops;

a sheath comprising a lumen, wherein the support filament is disposed in the lumen such that the sheath is slideable with respect to the support filament; and

a handle comprising an actuator;

wherein movement of the actuator in a first direction retracts the sheath and causes the plurality of stacked loops to expand outside the lumen in an arc-like shape; and

wherein movement of the actuator in a second direction advances the sheath and causes the plurality of stacked loops to at least partially collapse inside the lumen.

2. The endoscopic stone-extraction device of claim 1, wherein when the plurality of stacked loops expand outside the lumen, the plurality of stacked loops fan out in an arc less than 180 degrees.

3. The endoscopic stone-extraction device of claim 1, wherein the plurality of stacked loops are the same size.

4. The endoscopic stone-extraction device of claim 1, wherein at least some of the plurality of stacked loops are of different sizes, and wherein at least some of the different-sized loops are arranged in decreasing-size order to form a hood-like structure.

5. The endoscopic stone-extraction device of claim 1, wherein when the plurality of stacked loops are collapsed inside the lumen, the plurality of stacked loops are positioned on top of one another.

6. The endoscopic stone-extraction device of claim 1, wherein there are no elements extending between or across the plurality of stacked loops when the plurality of stacked loops expand outside the lumen

7. The endoscopic stone-extraction device of claim 1, wherein the plurality of stacked loops comprises only a set of longitudinal filaments radiating from the end portion of the support filament and no lateral filaments

8. The endoscopic stone-extraction device of claim 1, wherein the plurality of stacked loops are formed from a plurality of individual filaments, all of which are joined to the support filament.

9. The endoscopic stone-extraction device of claim 1, wherein the plurality of stacked loops are formed from a single filament.

10. The endoscopic stone-extraction device of claim 9, wherein the single filament is the support filament.

11. The endoscopic stone-extraction device of claim 9, wherein the single filament is separate from but joined to the support filament.

12. The endoscopic stone-extraction device of claim 1, wherein the plurality of stacked loops are made from a shape memory metal.

13. The endoscopic stone-extraction device of claim 12, wherein the shape memory metal comprises nitinol.

14. The endoscopic stone-extraction device of claim 1, wherein the handle includes a laser fiber port.

15. The endoscopic stone-extraction device of claim 1, wherein the sheath is sized to fit along side a laser fiber in a port of an endoscope via a Y-adaptor.

16. The endoscopic stone-extraction device of claim 1, wherein distal ends of the plurality of stacked loops arc outwardly from a longitudinal axis of the lumen.

17. The endoscopic stone-extraction device of claim 1, wherein proximal ends of the plurality of stacked loops meet at a single point.

18. The endoscopic stone-extraction device of claim 1, wherein other than at a single connection point, the plurality of stacked loops are non-intersecting.

19. The endoscopic stone-extraction device of claim 1, wherein other than a connection point, the plurality of stacked loops are independent from one another.