A vascular graft comprising a three dimensional helical shape on an internal surface of the graft. The helical shape extends for at least half the graft length. The helical shape may be formed by a pair of equidistant ridges for the entire length of the ridges. The graft diameter may be less than 6mm. The graft may be formed through depositing a polymer fibre by electrospinning on an outer surface of a device. Helical shape helix angle may be between 30 to 60 degrees. A device 1 for producing the vascular graft comprising: a main shaft 2； a tubular member 4 having an outer surface 4a； a rotational end plate 5； and a series of hinges and cams within tubular member 4. The device may be a mandrel. Outer surface 4a may have a pair of continuous grooves 11 with depth of between 0.10 mm and 0.40 mm. The pair of grooves 11 may wind around the outer surface 4a forming a helical pattern. A compression device for compressing the polymer fibre on the device. The compression device may comprise a plurality of curved blades with ridges corresponding with the device grooves 11. A method for producing a vascular graft.
