the anastomosis device 10 reforms the deployed shape of fig2 spontaneously when removed from the constraining tube this allows the accurate placement of the anastomosis device 10 spontaneous and nearly instantaneously upon deployment of the device the need for a mechanical deployment device to mechanically deform the anastomosis device from the insertion configuration to the deployed configuration is also avoided the anastomosis devices of the present invention may be made of any known superelastic or pseudoelastic material u s pat no 5 597 378 provides a discussion of superelastic and pseudoelastic materials and is incorporated herein by reference in its entirety the deployed anastomosis device 10 as shown in fig2 includes an inner flange formed by outwardly extruding ends 22 of the j shaped hooks 18 the deployed device 10 also includes an outer flange formed by the legs 16 extending outward from the body 14 in use a graft vessel 30 shown in fig3 is threaded through a center of the anastomosis device 10 an end 34 of the graft vessel 30 is everted around the hooks 18 and the hook ends 22 penetrate into or through the everted end 34 of the graft vessel retaining the graft vessel in place on the anastomosis device 10 as illustrated in fig3 the anastomosis device 10 with the.