A delivery system comprising: a delivery catheter (420) comprising: an outer sheath (421) comprising a polymeric material and attached along the distal end of a relatively long and flexible tubular shaft, the outer sheath (421) comprising a polymeric material and being capable of constraining a medical device in a longitudinally stretched position, and subsequently being retracted relative to the flexible tubular shaft to release the medical device from the constrained longitudinally stretched position and an inner lumen (422) substantially coaxial to the outer sheath (421) and incorporated into the flexible tubular shaft characterized in that the delivery system further comprises: a self-supporting medical device (400) comprising a thin film tube(401) having a thickness between 1 µm and 50 µm wherein the thin film tube(401) is in a longitudinally stretched position, constrained by the outer sheath.
