the PRECious Trial: PREdiction of Complications

20% of patients who undergo major abdominal surgery will have a major complication, which requires invasive treatment and is associated with increased mortality, morbidity, hospital stay and intensive care stay. A quality control algorithm after Major Abdominal Surgery (MAS) aimed at early identification of patients at risk of developing major complications can decrease associated morbidity and mortality. Literature studies show promising results for C-reactive protein as an early marker for postoperative complications, however clinical significance has yet to be determined. Here the investigators propose a randomized clinical trial in order to determine the effect of postoperative monitoring with standardized CRP measurements on postoperative morbidity and mortality, if CRP levels exceed 140 mg/L additional CT-scan imaging will be conducted.