Comprehensive review of post-liver resection surgical complications and a new universal classification and grading system

Table 1 Comparison between the modified grading system and the Clavien-Dindo classification

Modified grades	Clavien-Dindo classification
Grade A	GradeI	Any deviation from the normal postoperative course that did not require special treatment
	Grade II	Cases requiring pharmacological treatment
Grade B	Grade IIIa	Cases requiring surgical or radiological interventions without general anesthesia
Grade C	Grade IIIb	Cases requiring surgical or radiological interventions performed under general anesthesia
	Grade IVa	Life-threatening complications involving single organ dysfunction
Grade D	Grade IVb	Life-threatening complications involving multiple organ dysfunction
	Grade V	Cases that resulted in death