difficult and time consuming particularly in minimally invasive procedures where space may be limited and in procedures in which it may be desired to perform an anastomosis without stoppage of blood flow through the target vessel the superelastic or pseudoelastic anastomosis device and method of the present invention allow anastomosis to be performed efficiently and effectively in tight spaces the anastomosis may also be performed with or without stoppage of blood flow in a target vessel and with or without the use of cardiopulmonary bypass fig1 illustrates an anastomosis device 10 according to a first embodiment of the present invention in a constrained insertion configuration in which the anastomosis device would be inserted into a target blood vessel fig2 illustrates the anastomosis device 10 of fig1 in an expanded deployed configuration which holds a graft vessel to a target vessel the superelastic or the pseudoelastic anastomosis device in fig1 includes a substantially cylindrical body 14 a plurality of legs 16 extending from a first side of the body and a plurality of hooks 18 extended from a second side of the body in the insertion configuration illustrated in fig1 the body 14 the legs 16 and the hooks 18 are substantially aligned in a constrained substantially cylindrical shape the anastomosis device 10 may be held.