INTESTINAL BYPASS USING MAGNETS

• US 20080208224A1
• Filed: 02/05/2008
• Published: 08/28/2008
• Est. Priority Date: 02/28/2007
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Wilson-Cook Medical Incorporated (Cook Group Incorporated)
• Inventors: SURTI, VIHAR C., DILLON, TRAVIS E.
• Granted Patent: US 8,864,781 B2
• Time in Patent Office: Days
• US Class Current: 606/153
• CPC Class Codes: A61B 17/1114 of the digestive tract, e.g. bowels or oesophagus
• CPC Class Codes: A61B 2017/003 Steerable
• CPC Class Codes: A61B 2017/00876 magnetic
• CPC Class Codes: A61B 2017/1103 Approximator
• CPC Class Codes: A61B 2017/1117 adapted for discharge after necrotisation, e.g. by evacuation, expulsion or excretion
• CPC Class Codes: A61B 2017/1139 Side-to-side connections, e.g. shunt or X-connections

Abstract

Medical devices and methods are provided for forming an intestinal bypass anastomosis, such as for treatment of obesity. The medical devices and methods are minimally invasive and reduce complications. Two magnet assemblies are deployed in a spaced apart relationship, and are transluminally brought together to approximate the tissue and form an anastomosis therebetween.

Claims

1. A method of forming an anastomosis between a proximal section of the digestive tract and distal section of the digestive tract, the method comprising the steps of:

placing a first magnet assembly within the distal section;

placing a second magnet assembly within the proximal section;

forming an opening within a wall of a bodily lumen;

passing medical instrumentation through the opening;

engaging the distal section proximate the first magnet assembly with the medical instrumentation;

moving the distal section such that the first magnet assembly becomes magnetically coupled to the second magnet assembly; and

forming an anastomosis between the proximal and distal sections of the digestive tract proximate the first and second magnet assemblies.

2. The method of claim 1, wherein the medical instrumentation is capable of being steered.

3. The method of claim 2, wherein the medical instrumentation includes a steerable endoscope having a grasping device positioned within a working channel of the endoscope.

4. The method of claim 2, wherein the medical instrumentation includes a directing catheter having a magnetic tip.

5. The method of claim 2, wherein the medical instrumentation includes a steerable wire guide having a magnetic tip.

6. The method of claim 1, wherein the medical instrumentation includes a magnetic portion, and wherein the step of engaging the distal section includes magnetically coupling the magnetic portion with the first magnet assembly.

7. The method of claim 6, further comprising the step of decoupling the magnetic portion of the medical instrumentation from the first magnet assembly.

8. The method of claim 7, wherein the medical instrumentation includes a directing catheter having the magnetic portion and a pushing catheter defining a lumen receiving the directing catheter, and wherein the second magnet assembly includes an aperture sized to receive the directing catheter, and wherein the decoupling step comprises translating the pushing catheter and directing catheter relative to one another such that the directing catheter is substantially withdrawn into the lumen of the pushing catheter.

9. The method of claim 8, wherein the opening in the bodily lumen is sized to receive the directing catheter therethrough and prevent passage of the second magnet assembly therethrough.

10. The method of claim 1, further comprising the step of introducing a signal emitter within the distal section proximate the first magnet assembly, and wherein the medical instrumentation includes a sensor capable of detecting a signal from the signal emitter.

11. The method of claim 1, wherein the forming step includes introducing an endoscopic cutting instrument proximate the magnetically engaged first and second magnet assemblies, and excising tissue of the proximal and distal sections proximate the first and second magnet assemblies to form the anastomosis.

12. The method of claim 1, wherein the first and second magnet assemblies are structured to engage over an area and induce necrosis of tissue within the area to form the anastomosis.

13. The method of claim 1, wherein the step of placing the first magnet assembly occurs via a natural orifice.

14. The method of claim 1, wherein the step of placing the second magnet assembly occurs via a natural orifice.

15. A medical instrument for engaging a first magnet assembly and magnetically coupling the first magnet assembly with a second magnet assembly, the medical instrument comprising:

a steerable elongate element having a magnetic portion;

a pushing catheter defining a lumen slidably receiving the steerable elongate element; and

the second magnet assembly defining an aperture sized to receive the steerable elongate element such that the second magnet is positioned on the outer periphery of the steerable elongate element, wherein relative translation of the pushing catheter and steerable elongate element causes the second magnet assembly to move distally over the steerable elongate element for engagement with the first magnet assembly.

16. The medical instrument of claim 15, wherein the aperture is sized smaller than an outer diameter of the pushing catheter.

17. The medical instrument of claim 15, wherein the aperture is sized to frictionally engage the second magnet assembly to the steerable elongate element.

18. The medical instrument of claim 15, wherein the magnetic portion is magnetically coupled to the first magnet assembly, and wherein the steerable elongate element is substantially withdrawn into the lumen of the pushing catheter to decouple the magnetic portion and first magnet assembly.

19. The medical instrument of claim 15, wherein the magnetic centerline of the magnetic portion is generally parallel to the magnetic centerline of the second magnet assembly.

20. The medical instrument of claim 15, wherein the magnetic centerline of the magnetic portion is generally perpendicular to the magnetic centerline of the second magnet assembly.