INTESTINAL BYPASS USING MAGNETS

• US 20110060353A1
• Filed: 11/12/2010
• Published: 03/10/2011
• Est. Priority Date: 02/28/2007
• Status: Active Grant

• Current Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Original Assignee: Wilson-Cook Medical Incorporated (Cook Group Incorporated)
• Inventors: Dillon, Travis E., Surti, Vihar C.
• Granted Patent: US 9,226,753 B2
• Time in Patent Office: Days
• US Class Current: 606/150
• 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 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.

2. The medical instrument of claim 1, wherein the aperture is sized smaller than an outer diameter of the pushing catheter.

3. The medical instrument of claim 1, wherein the aperture is sized to frictionally engage the second magnet assembly to the steerable elongate element.

4. The medical instrument of claim 1, wherein the steerable elongate element is substantially withdrawn into the lumen of the pushing catheter to decouple the magnetic portion and first magnet assembly.

5. The medical instrument of claim 4, wherein the magnetic portion is configured to be magnetically coupled to the first magnet assembly.

6. The medical instrument of claim 5, wherein the magnetic coupling of the magnetic portion to the first magnet assembly is sized to be overcome by relative translation of the steerable elongate element and the pushing catheter.

7. The medical instrument of claim 6, wherein the first and second magnet assemblies are magnetically coupled when the magnetic coupling of the magnetic portion to the first magnet assembly is overcome.

8. The medical instrument of claim 1, wherein the magnetic centerline of the magnetic portion is generally parallel to the magnetic centerline of the second magnet assembly.

9. The medical instrument of claim 1, wherein the magnetic centerline of the magnetic portion is generally perpendicular to the magnetic centerline of the second magnet assembly.

10. The medical instrument of claim 1, wherein the magnetic portion is semi-spherically shaped.

11. The medical instrument of claim 1, wherein the magnetic portion is position at the distal end of the steerable elongate element.

12. The medical instrument of claim 11, wherein the magnetic portion includes an outer surface that protrudes distally beyond the distal end of the steerable elongate element.

13. The medical instrument of claim 1, wherein the pushing catheter is an overtube sized to receive an endoscope.

14. The medical instrument of claim 1, wherein the steerable elongate element includes a steerable endoscope having a grasping device positioned within a working channel of the endoscope.

15. The medical instrument of claim 1, wherein the steerable elongate element includes a directing catheter having a magnetic tip forming the magnetic portion.

16. The medical instrument of claim 1, wherein the steerable elongate element includes a steerable wire guide having a magnetic tip forming the magnetic portion.

17. The medical instrument of claim 1, wherein the first magnet assembly is sized larger than the aperture in the second magnet assembly.