Abstract: Medical device (10) having a film support structure (12), the film support structure comprising a composition containing chitosan, the film support structure (12) including a surface sculpturing (14). The surface sculpturing (14) comprises a plurality of peaks (16) and troughs (18) defining a plurality of grooves, the peaks (16) having a peak width (PW) ranging from 0.1 to 1000 ?m, preferably 1 to 100 ?m, the troughs have a trough width (TW) ranging from 0.1 to 1000 ?m, preferably 1 to 100 ?m, wherein a peak to trough distance (D) ranges from 0.1 to 1000 ?m.