EUS guided access device

Patent metadata

Field	Value
Publication number	US-9974561-B2
Application number	US-201514794465-A
Country	US
Kind code	B2
Filing date	Jul 8, 2015
Priority date	Jul 15, 2014
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

A system for endoscopic ultrasound guided drainage includes an access sheath extending longitudinally from a proximal end to a distal end and including an access lumen extending therethrough from the proximal end to the distal end; a stylet slidably received within the access lumen, the stylet extending longitudinally from a proximal end to distal end and including a channel extending therethrough, the channel configured to receive a fluid therethrough; and a dilating sheath extending longitudinally from a proximal end to a distal end and including a dilating lumen extending therethrough. The dilating lumen is sized and shaped to slidably receive the access sheath.

First claim

What is claimed is:

1. A system for endoscopic ultrasound guided drainage, comprising:
an access sheath extending longitudinally from a proximal end to a distal end and including an access lumen extending therethrough from the proximal end to the distal end;
a stylet slidably received within the access lumen, the stylet extending longitudinally from a proximal end to distal end and including a channel extending therethrough, the channel configured to receive a fluid therethrough; and
a dilating sheath extending longitudinally from a proximal end to a distal end and including a dilating lumen extending therethrough, the dilating lumen sized and shaped to slidably receive the access sheath, the dilating sheath including a stepped diameter increase at a discrete distance from the distal end.

2. The system of claim 1 , wherein the access sheath includes a distal portion biased toward a curved configuration.

3. The system of claim 2 , wherein the access sheath is formed of a flexible polymeric material which permits the curved distal portion to be moved to a straightened configuration when the stylet is received therein.

4. The system of claim 2 , wherein the curved configuration is one of a pigtail loop, a J-shape and a shepherd's crook.

5. The system of claim 1 , wherein the stylet includes a distal portion having a diameter larger than a remaining length of the stylet extending proximally from the distal portion.

6. The system of claim 1 , wherein a portion of the channel extending through the distal portion of the stylet is defined by an annular space extending about a longitudinal axis of the stylet.

7. The system of claim 1 , further comprising a handle assembly coupled to a proximal end of each of the stylet, access sheath and dilating sheath.

8. The system of claim 7 , wherein the handle assembly includes an actuator for moving the dilating sheath longitudinally relative to the access sheath.

9. The system of claim 1 , the dilating sheath including an electrode at a distal end thereof configured to cauterize tissue.

10. The system of claim 1 , wherein the dilating sheath includes a plurality of stepped diameter increases at discrete distances from the distal end.

11. A system for endoscopic drainage, comprising:
an access sheath extending longitudinally from a proximal end to a distal end and including an access lumen extending therethrough from the proximal end to the distal end;
a stylet slidably received within the access lumen, the stylet extending longitudinally from a proximal end to distal tip and including a channel extending therethrough, the channel configured to receive a fluid therethrough, a distal portion of the stylet having a larger diameter than a remaining portion of the stylet extending proximally therefrom, the diameter of the distal portion of the stylet corresponding to a diameter of the access lumen to facilitate puncturing of a target tissue; and
a dilating sheath extending longitudinally from a proximal end to a distal end and including a dilating lumen extending therethrough, the dilating lumen sized and shaped to slidably receive the access sheath, the dilating sheath including a stepped diameter increase at a discrete distance from the distal end.

12. The system of claim 11 , wherein the access sheath includes a distal portion biased toward a curved configuration.

13. The system of claim 11 , further comprising a handle assembly coupled to a proximal end of each of the stylet, access sheath and dilating sheath.

14. The system of claim 11 , wherein a portion of the channel extending through the distal portion of the stylet is defined by an annular space extending about a longitudinal axis of the stylet.

15. The system of claim 13 , wherein the access sheath is formed of a flexible polymeric material which permits the curved distal portion to be moved to a straightened configuration when the stylet is received therein.

16. The system of claim 13 , wherein the handle assembly includes an actuator for moving the dilating sheath longitudinally relative to the access sheath.

17. A method for endoscopic ultrasound guided drainage, comprising:
inserting an access sheath and a stylet through a working channel of an endoscope into a target duct within a body, the stylet extending through a lumen of the access sheath such that a distal tip of the stylet extends distally past a distal end of the access sheath so that the distal tip punctures the target duct;
injecting a contrast media through a channel of the stylet into the target duct to visually verify that the target duct is filled with fluids; and
advancing a dilating sheath distally over the access sheath and into the target duct to dilate the target duct.

18. The method of claim 17 , wherein the target duct is one of a bile duct, pancreatic duct, a cyst and a gallbladder.

19. The method of claim 17 , further comprising removing the stylet from the access sheath so that a distal portion of the access sheath reverts to a curved configuration.

20. The method of claim 17 , further comprising cauterizing a surface of the target duct via an electrode of the dilating sheath.

21. The method of claim 17 , further comprising inserting a stent into the target duct to maintain the target duct in an enlarged configuration to ensure continued drainage thereof.

Assignees

• Boston Scient Scimed Inc

Inventors

• Benning Christopher A
• Whitney Andrew J
• Bannon Bryan

Classifications

• A61B2218/007

  Aspiration · CPC title

• A61B17/3415 Primary

  for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters (A61B17/3417 takes precedence; body piercing catheter guide needles A61M25/06) · CPC title

• A61M27/00

  Drainage appliance for wounds or the like {, i.e. wound drains, implanted drains} ({negative pressure wound therapy devices A61M1/90;} implements for holding wound open A61B17/02 {; middle ear drainage A61F11/202}) · CPC title

• A61B2017/00867

  shape memory effect · CPC title

• A61M2210/1075

  Gall bladder · CPC title