A stent-graft (10) comprises: a graft (20) defining an elongate lumen (22) having a longitudinal axis (25)； an external stent (300) having a plurality of struts (351) and apices (311,381) between the struts, the apices including proximal apices and distal apices； a set of proximal sutured knots, the proximal sutured knots securing the proximal apices of the stent to the graft； a set of distal sutured knots, the distal sutured knots securing the distal apices of the stent to the graft； and a plurality of intermediate sutured knots (501a,501b), formed along a continuous suture (500), the continuous suture including a plurality of bridging portions (530), the bridging portions bridging between neighbouring struts of the stent, the intermediate sutured knots securing struts of the stent to the graft.
