Table 2 Complication grades according to the Dindo-DeOliveira classification scheme ^a

Grade I

Any deviation from the normal postoperative course without the need for pharmacological treatment or surgical, endoscopic and radiologic intervention

Grade II

Requiring pharmacological treatment with drugs other than those allowed for grade I complications

Grade III

Requiring surgical, endoscopic or radiological intervention

Grade IIIa

Intervention not under general anaesthesia

Grade IIIb

Intervention under general anaesthesia

Grade IV

Life-threatening complications requiring intensive care unit management

Grade IVa

Single-organ dysfunction

Grade IVb

Multiorgan dysfunction

Grade V

Death of patient