Table 2.

Classification for surgical complications according to Clavien and Dindo (modified from Sink 2012) [24]

Grade	Definition
I	A complication that requires no treatment and has no clinical relevance; there is no deviation from routine follow-up during the postoperative period; allowed therapeutic regimens include: antiemetics, antipyretics, analgesics, diuretics, electrolytes, antibiotics, and physiotherapy
II	A deviation from the normal postoperative course (including unplanned clinic visits) that requires outpatient treatment: either pharmacologic or close monitoring as an outpatient
III	A complication that is treatable but requires surgical, endoscopic, or radiographic interventions or an unplanned hospital admission
IV	A complication that is life threatening, requires ICU admission, or is not treatable with potential for permanent disability; a complication that requires organ resection (THA)
V	Death