Endoscopic Stone-Extraction Device

• US 20170258481A1
• Filed: 05/22/2017
• Published: 09/14/2017
• Est. Priority Date: 06/12/2014
• Status: Active Grant

• Current Assignee: Innon Holdings, LLC
• Original Assignee: Innon Holdings, LLC
• Inventors: Dhindsa, Avtar S.
• Granted Patent: US 10,448,962 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 1/00085 Baskets
• CPC Class Codes: A61B 1/00087 Tools A61B17/00234 takes precedence
• CPC Class Codes: A61B 1/307 for the urinary organs, e.g. urethroscopes, cystoscopes
• 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 2017/00367 Details of actuation of instruments, e.g. relations between pushing buttons, or the like, and activation of the tool, working tip, or the like
• 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
• CPC Class Codes: A61B 2017/2217 single wire changing shape to a gripping configuration

Abstract

An endoscopic stone-extraction device is provided comprising a support filament comprising an end portion, 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 a shape to expand outside the lumen. Movement of the actuator in a second direction advances the sheath and causes the shape to at least partially collapse inside the lumen. Other embodiments are provided, 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;

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 laser fiber disposed within the sheath;

wherein movement of the actuator in a first direction retracts the sheath and causes the end portion to expand outside the lumen in a two-dimensional mesh shape that is generally perpendicular to an axis of the lumen;

wherein the two-dimensional mesh shape is made of a shape memory material and is connected to the support filament via two secondary filaments;

wherein the two secondary filaments attach on two opposite sides of the two-dimensional mesh shape; and

wherein movement of the actuator in a second direction advances the sheath and causes the two-dimensional mesh shape to at least partially collapse inside the lumen.

2. The endoscopic stone-extraction device of claim 1, wherein the laser fiber fits alongside the support filament.

3. The endoscopic stone-extraction device of claim 1, wherein the laser fiber is disposed within the support filament.

4. The endoscopic stone-extraction device of claim 1, wherein the shape memory material comprises a shape memory metal.

5. The endoscopic stone-extraction device of claim 1, wherein the two-dimensional mesh shape is configured to extract a stone and configured to serve as a mechanical trapping/backstop device.

6. The endoscopic stone-extraction device of claim 1, wherein the two-dimensional mesh shape is formed from a plurality of filaments.

7. The endoscopic stone-extraction device of claim 1, wherein the two-dimensional mesh shape is selected from the following shapes:

a square, a circle, and a triangle.

8. The endoscopic stone-extraction device of claim 1, wherein the two-dimensional mesh shape is a polygon.

9. The endoscopic stone-extraction device of claim 1, wherein the two-dimensional mesh shape comprises a rim with a rigidity varies with distance from an attachment point.

10. The endoscopic stone-extraction device of claim 9, wherein the rigidity of the rim increases with distance from the attachment point to a point halfway between the attachment point and a second attachment point.

11. An endoscopic stone-extraction device comprising:

a support filament comprising an end portion;

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;

a handle comprising an actuator and a laser fiber port; and

a laser fiber disposed within the sheath;

wherein the end portion comprises a two-dimensional mesh shape and comprises a shape memory material that expands outside the lumen to trap a stone and to serve as a mechanical backstop to prevent migration of a stone;

wherein the two-dimensional mesh shape is generally perpendicular to an axis of the lumen, the two-dimensional mesh shape is connected to the support filament via two secondary filaments coupled to opposite sides of the two-dimensional mesh shape; and

wherein the two-dimensional mesh shape is configured to collapse inside the lumen of the sheath.

12. The endoscopic stone-extraction device of claim 11, wherein the laser fiber fits alongside the support filament.

13. The endoscopic stone-extraction device of claim 11, wherein the laser fiber is disposed within the support filament.

14. The endoscopic stone-extraction device of claim 11, wherein the two-dimensional shape is formed from a plurality of filaments.

15. The endoscopic stone-extraction device of claim 11, wherein the shape memory material comprises a shape memory metal.

16. The endoscopic stone-extraction device of claim 11, wherein the two-dimensional mesh shape is selected from the following shapes:

a square, a circle, and a triangle.

17. The endoscopic stone-extraction device of claim 11, wherein the two-dimensional mesh shape is a polygon.

18. The endoscopic stone-extraction device of claim 11, wherein the two-dimensional mesh shape comprises a rim with a rigidity varies with distance from an attachment point.

19. The endoscopic stone-extraction device of claim 18, wherein the rigidity of the rim increases with distance from the attachment point to a point halfway between the attachment point and a second attachment point.

20. The endoscopic stone-extraction device of claim 11, wherein the two-dimensional mesh shape comprises a rim that is softer than a mesh disposed within the rim.