Magnetic anastomosis assembly

An assembly comprising:

• a magnet with an external passageway and a guidewire, which supports said magnet, passing through said passageway, said external passageway comprising an outwardly extending flange which is formed with a lumen that has open ends through which said guidewire passes;
• a guidewire device that comprises a cannula with a guidewire lumen, said cannula comprising a first adaptor portion spaced from a second adaptor portion by a gap, said gap being dimensioned to at least partially receive therein said flange, and wherein said first and second adaptor portions are connected to each other with a link member;
• and
• said guidewire passes through said guidewire lumen of said first and second adaptor portions of said cannula and passes through said flange placed in said gap, wherein said magnet is held by said guidewire and cannot fall off said guidewire, and wherein surfaces of said first and second adaptor portions prevent said magnet from moving axially along said guidewire, said surfaces comprising left and right shoulders on said cannula at opposite ends of said gap;
• and a protrusion, separate from said guidewire, that extends from said magnet to said flange, said protrusion extending axially beyond left and right sides of said flange, and said protrusion having left and right end faces configured to abut against said left and right shoulders.