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Table 1 Clavien-Dindo Classification

From: “One-step” approach versus “Step-up” approach minimally invasive treatment for infected pancreatic necrosis: a study protocol for a single-center, prospective, randomized controlled trial

Grade Definition
I Any complication that deviates from the natural course after surgery, including the use of antiemetics, antipyretics, analgesics, diuretics, infusion, and physical therapy, as well as bedside debridement of incision infection
II Medications other than those permitted for grade I complications are required, including blood transfusion and total parenteral nutrition support
III Surgical, endoscopic, and radiotherapy are required
IIIa No general anesthesia is required
IIIb Need for general anesthesia
IV Life-threatening complication, including centeral nervous system complications and required intermittent monitoring or intensive care unit (ICU) treatment
IVa Single organ dysfunction
IVb Multi-organ dysfunction
V Death