Randomized Trial Comparing Prevena and ActiV.A.C. System to Convetional Care After Bascom's Cleft Lift Surgery

In a single-blinded randomized, controlled study design the investigators wish to examine to effect of Prevena + ActiV.A.C. therapy system on the postoperative healing in patients operated for chronic pilonidal disease using Bascoms\' Cleft Lift procedure. At the department of surgery at The regional Hospital i Randers Denmark the investigators handle cases from the entire region and have a decent patient volume. The investigators have used Bascoms\' Cleft left since 2013 and registered complications and experience wound deshisseance or prolonged healing in approx. 15% causing the investigators to challange the postoperative regime.