a medical device which can be implanted at a target site in a living body . the device includes an inner flange formed by radial expansion of the device and an outer flange formed by axial compression of the device . the device can include an implant portion and a discard portion which separate from each other during formation of the outer flange . the separation can occur by fracturing a frangible linkage or by mechanically separating a portion of the outer flange from a deployment tool . the device can be a one piece anastomosis device for connecting a graft vessel to a target vessel without the use of conventional sutures . the inner and outer flanges capture the edges of an opening in a target vessel and secure the graft vessel to the opening in the target vessel . the device greatly increases the speed with which anastomosis can be performed over known suturing methods .