This study is designed as an unblinded, prospective randomised cohort trial. The treatment arms consist of either strict prolonged bed rest for 48 hours or immediate postoperative mobilisation. Patients are going to be randomised into either treatment arm after intraoperative verification of ID. Randomization into either treatment arm is going to be performed in a consecutive alternating manner. The according mobilisation regimen is going to be prescribed by the surgeon performing the index procedure immediately after wound closure as a standard option in the institutions proprietary hospital information system. Symptoms of persisting liquor leakage are going to be assessed by Investigator. Additional confirmation via MRI scan is routinely performed if persistent leakage is suspected and revision surgery is planned. For Patients with symptoms of persisting dural leakage after a 48 hours course of early mobilization a course of 24 hours of bed rest will be administered before revision surgery is scheduled.