Update on pathogenesis and clinical management of acute pancreatitis

Table 2 Definitions for acute pancreatitis according to the Atlanta classification[1,6]

Criteria of illness severity in acute pancreatitis
Local complications	Necrosis: focal or diffuse area of non viable pancreatic parenchyma, with necrosis of peripancreatic fat (> 30% of the gland or > 3 cm) Pseudocyst: pancreatic juice collection surrounded by a wall of granulation or fibrous tissue that is developed as a consequence of acute or chronic pancreatitis or pancreatic traumatism Abscess: pus collection well defined that has scarce or no amount of pancreatic necrosis
Systemic complications (organic failure)	Respiratory failure: PaO2 < 60 mmHg Shock: systolic BP < 90 mmHg Renal failure: creatinine > 2 mg/dL after rehydration Upper gastrointestinal bleeding: > 500 mL/24 h
Bad prognosis data	Ranson’s scale ≥ 3 APACHE II scale ≥ 8

APACHE: Acute physiology and chronic health evaluation.