Blinding
Blinding of participants, research assistants, operating surgeons, data collectors, and outcome assessors to the treatment allocation is not feasible. Postoperative blinding of patients and outcome assessors is not possible since unblinding would occur when vacuum suction was removed before the assessment of the primary endpoint. Outcome assessment will be carried out by trained study personnel who are not part of the surgical or ward team to guarantee objectivity. Data analysts will be blinded to the intervention.