A delivery assembly (10) for an implant (30) includes a release mechanism with a locking element (52) and a blocking member (56). The locking element (52) includes a latching pin (14) that engages with an eyelet (54) in the implant (30) to attach the implant (30) to a distal end of an inner catheter (36). The blocking member (56) prevents premature disengagement of the latching pin (14) from the implant (30). Withdrawal of the blocking member (56) allows disengagement of the latching pin (14). The locking pin (52) and the blocking member (56) extend along the lumen of the inner catheter (36) from a handle (12) such that a guide wire (34) is also able to extend through the lumen of the inner catheter (36). The locking pin (52) and the blocking member (56) preferably have a crescent-shaped transverse cross section. The release mechanism allows retrieval of the implant (30).
