Concealment mechanism {16b}
Allocation concealment will be ensured as the result of the randomisation will be unknown to the study team until the patient has been randomised through the web-based tool. Block size will be kept confidential to the study team. Randomisation will be performed in the operation theatre, after the closure of the posterior rectus sheath/posterior fascia. This prevents potential bias by different intraoperative techniques. Before randomisation, the surgeon needs to rule out an infected/septic surgical site (risk for surgical site occurrences (SSO) of grade 4 according to Ventral Hernia Working Group (VHWG) classification) [