Medical devices and methods to prevent bile reflux after bariatric procedures

Patent metadata

Field	Value
Publication number	US-10610348-B2
Application number	US-201816006033-A
Country	US
Kind code	B2
Filing date	Jun 12, 2018
Priority date	Jun 26, 2014
Publication date	Apr 7, 2020
Grant date	Apr 7, 2020

Abstract

An endoscopic stent for implantation in a patient after sleeve gastrectomy or biliopancreatic diversion with duodenal switch or biliopancreatic diversion with duodenal switch comprising a stent portion, the stent portion comprising a proximal end portion, the proximal end portion defined by a length of about 50 mm to about 200 mm, an enlarged middle portion, a middle portion having an enlarged diameter relative to the proximal end portion and the distal end portion and defined by a length of about 20 mm to about 80 mm, and a distal end portion and a polymeric sleeve portion engaged to and extending distally from the distal end portion of the stent.

First claim

The invention claimed is:

1. A method for implanting a stent in portions of a patient's esophagus, stomach, and duodenum after bariatric surgery, the method comprising:
inserting a stent into the esophagus, stomach, and duodenum, the stent including a stent portion having a proximal end portion, a distal end portion, an enlarged middle portion located between the proximal end portion and the distal end portion, and a polymeric cover disposed over the stent portion and extending distally beyond the distal end portion forming a polymeric sleeve portion; and
positioning the stent with the proximal end portion extending into a distal portion of the esophagus, the distal end portion positioned in the stomach, the enlarged middle portion within a central portion of the stomach, and the polymeric sleeve portion extending into the duodenum.

2. The method of claim 1 , wherein the enlarged middle portion has an enlarged diameter relative to both the proximal end portion and the distal end portion.

3. The method of claim 1 , wherein the distal end portion of the stent terminates in the stomach.

4. The method of claim 1 , wherein only the polymeric sleeve portion extends into the duodenum.

5. The method of claim 1 , wherein the stent portion is formed of stent material, wherein the polymeric sleeve portion is devoid of stent material.

6. The method of claim 1 , wherein the polymeric sleeve portion is elastomeric.

7. The method of claim 1 , wherein the polymeric sleeve portion comprises silicone.

8. The method of claim 1 , wherein the stent portion is braided, woven or laser cut.

9. The method of claim 1 , wherein the stent portion comprises nickel-titanium alloy, cobalt-chromium-nickel alloy, cobalt-chromium alloy, or stainless steel.

10. A method for implanting a stent in portions of a patient's esophagus, stomach, and duodenum after bariatric surgery, the method comprising:
inserting a stent into the esophagus, stomach, and duodenum, the stent including a stent portion having a proximal end portion, a middle portion, a distal end portion, and a polymeric cover disposed over at least the distal end portion and extending distally beyond the distal end portion forming a polymeric sleeve portion, the middle portion having an enlarged diameter relative to both the proximal end portion and the distal end portion; and
positioning the proximal end portion within the esophagus, the middle portion within the stomach, and the polymeric sleeve portion extending into the duodenum.

11. The method of claim 10 , wherein only the polymeric sleeve portion extends across the patient's pyloric valve.

12. The method of claim 10 , wherein the distal end portion extends into and resides within the duodenum.

13. The method of claim 12 , wherein at least a portion of the distal end portion of the stent comprises reduced radial strength, wherein a portion of the distal end portion is positioned to extend across the patient's pyloric valve, wherein the portion of the distal end portion comprises reduced radial strength and is configured to allow the pyloric valve to open and close.

14. The method of claim 10 , wherein the distal end portion of the stent terminates in the stomach.

15. The method of claim 10 , wherein the polymeric sleeve portion is elastomeric.

16. The method of claim 10 , wherein the polymeric sleeve portion comprises silicone.

17. The method of claim 10 , wherein the stent portion is braided, woven or laser cut.

18. The method of claim 10 , wherein the stent portion comprises nickel-titanium alloy, cobalt-chromium-nickel alloy, cobalt-chromium alloy, or stainless steel.

19. A method for implanting a stent in portions of a patient's esophagus, stomach, and duodenum after bariatric surgery, the method comprising:
inserting a stent into the esophagus, stomach, and duodenum, the stent including a stent portion having a proximal end portion, a middle portion, a distal end portion, and a polymeric cover disposed over at least the distal end portion and extending distally beyond the distal end portion forming a polymeric sleeve portion; and
positioning the proximal end portion within the esophagus, the middle portion within the stomach, and the polymeric sleeve portion extending into the duodenum;
wherein the distal end portion extends into and resides within the duodenum; and wherein at least a portion of the distal end portion of the stent comprises reduced radial strength, wherein a portion of the distal end portion is positioned to extend across the patient's pyloric valve, wherein the portion of the distal end portion comprises reduced radial strength and is configured to allow the pyloric valve to open and close.

Assignees

• Boston Scient Scimed Inc

Inventors

• Hingston John A
• Clerc Claude O
• Root Jonathan
• Shah Vishal

Classifications

• A61F2002/045

  Stomach, intestines · CPC title

• A61F2002/041

  Bile ducts · CPC title

• A61F2/2475

  Venous valves · CPC title

• A61F2/04 Primary

  Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts (A61F2/18, A61F2/20 take precedence; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95) · CPC title

• A61F2250/0039

  differing in diameter · CPC title