MAGNETIC ANASTOMOSIS DEVICE HAVING IMPROVED DELIVERY

• US 20090125042A1
• Filed: 10/08/2008
• Published: 05/14/2009
• Est. Priority Date: 10/09/2007
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Wilson-Cook Medical Incorporated (Cook Group Incorporated)
• Inventors: MOUW, STEVEN
• Granted Patent: US 8,118,821 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 2017/00876 magnetic
• CPC Class Codes: A61B 2017/1117 adapted for discharge after necrotisation, e.g. by evacuation, expulsion or excretion

Abstract

A magnet assembly for a magnetic anastamosis device is provide that is minimally invasive, easily and quickly delivered, and is accurately positioned to improve the delivery procedure. The magnet assembly includes an elongated hub and a plurality of magnetic members disposed over the elongated hub. The elongated hub is formed of a resilient or shape memory material, permitting the magnet assembly to be operable between a delivery configuration and a deployed configuration. In this manner, the package width of the magnet assembly is greatly reduced for delivery, thereby permitting delivery over a wire guide as well as through an access device such as a catheter. Associated delivery procedures and medical devices are also provided.

Claims

1. A magnet assembly for a magnetic anastamosis device used for forming an anastamosis between two bodily walls, the magnet assembly comprising:

an elongated hub; and

a plurality of magnetic members disposed over the elongated hub;

the magnet assembly operable between a delivery configuration and a deployed configuration, the elongated hub extending generally linearly in the delivery configuration, the elongated hub forming an annular shape in the deployed configuration.

2. The magnet assembly of claim 1, wherein the elongated hub is formed of a shape memory material.

3. The magnet assembly of claim 1, wherein the elongated hub is tubular and defines an inner passageway sized to receive a wire guide.

4. The magnet assembly of claim 1, wherein the plurality of magnetic members abut each other in the deployed configuration.

5. The magnet assembly of claim 1, wherein each of the plurality of magnetic members includes a hole sized to receive the elongated hub.

6. The magnet assembly of claim 5, wherein each hole is sized to permit the magnetic member to slide along the elongated hub.

7. The magnet assembly of claim 6, wherein the elongated hub includes a stop formed at an end of the elongated hub structured to prevent the plurality of magnetic members from passing beyond the end.

8. The magnet assembly of claim 1, wherein the plurality of magnetic members are fixed to the elongated hub.

9. The magnet assembly of claim 1, wherein the plurality of magnetic members and the elongated hub include corresponding tabs and detents to maintain the positions of the plurality of magnetic members along the elongated hub.

10. The magnet assembly of claim 1, wherein the plurality of magnetic members have a trapezoidal shape.

11. The magnet assembly of claim 1, wherein each of the plurality of magnetic members includes a jacket attached to a side thereof, each jacket projecting beyond the side to define an edge.

12. The magnet assembly of claim 11, wherein each edge contacts the edges of adjacent jackets to form a continuous annular edge in the deployed configuration.

13. A method for delivering a magnet assembly as part of a magnetic anastamosis device for forming an anastamosis between two bodily walls, the method comprising:

providing a magnet assembly having an elongated hub and a plurality of magnetic members disposed over the elongated hub;

introducing an access device to a position proximate a first bodily wall;

coupling the magnet assembly to the access device such that the magnet assembly takes a delivery configuration, the elongated hub and plurality of magnetic members extending generally linearly in the delivery configuration; and

translating the magnet assembly relative to the access device whereby the magnet assembly takes a deployed configuration, the elongated hub and plurality of magnetic members forming an annular shape in the deployed configuration.

14. The method of claim 13, wherein the access device is a wire guide, and wherein the elongated hub includes a passageway sized to receive the wire guide therein.

15. The method of claim 13, wherein the access device is a cannula having an internal passageway sized to receive the magnet assembly therein.

16. The method of claim 13, wherein the access device and magnet assembly are coupled together and then translated together into the viscera

17. A medical device for use in forming an anastamosis between two bodily walls, the medical device comprising:

a magnet assembly having an elongated hub and a plurality of magnetic members disposed over the elongated hub; and

an access device structured to be coupled to the magnet assembly;

the magnet assembly assuming a delivery configuration when the magnet assembly is coupled to the access device, the delivery configuration having a generally linear shape;

the magnet assembly assuming a deployed configuration when the magnet assembly is decoupled from the access device, the deployed configuration having a generally annular shape.

18. The medical device of claim 17, wherein the elongated hub is formed of a resilient material biased to the deployed configuration.

19. The medical device of claim 17, wherein the elongated hub is formed of a shape memory material which takes the deployed configuration when the elongated hub is exposed to body temperature.

20. The medical device of claim 17, wherein the access device is a wire guide, and wherein the elongated hub includes a passageway sized to receive the wire guide therein.

21. The medical device of claim 17, wherein the access device is a cannula having an internal passageway sized to receive the magnet assembly therein.