The timing of endoscopic intervention for necrotizing pancreatitis is determined based on the degree of encapsulation

In the encapsulation-oriented group, participants undergo EUS-guided drainage of necrotizing pancreatitis when the degree of encapsulation reaches ≥80%, as confirmed by cross-sectional imaging (preferably contrast-enhanced CT). Imaging is repeated every 7-10 days after enrollment to assess encapsulation. Once sufficient encapsulation is observed and the patient presents with symptoms such as infection, abdominal pain, GOO or biliary obstruction, endoscopic drainage is performed. Drainage is typically performed using a lumen-apposing metal stent (LAMS) placed under EUS guidance, often accompanied by placement of an external drain. Step-up therapy, including endoscopic necrosectomy or additional drainage procedures, may be used if symptoms do not improve. If the patient improves with conservative therapy before encapsulation is achieved, drainage may be deferred. Endoscopic/percutaneous interventions should, in principle, be discussed with the expert panel beforehand.

EUS-guided drainage based on the interval from the onset of acute pancreatitis

In the timing-oriented group, participants undergo EUS-guided drainage of necrotizing pancreatitis at 4 to 5 weeks after the onset of acute pancreatitis, regardless of the degree of encapsulation. Drainage is performed only in symptomatic patients who meet predefined clinical criteria, such as signs of infection, significant pain, GOO, or biliary obstruction. Imaging is performed before the procedure. The standard approach involves placing a LAMS under EUS guidance, optionally supplemented by external drains. If symptoms do not improve, step-up interventions such as endoscopic necrosectomy, percutaneous drainage may be considered. If inflammation and symptoms improve with conservative treatment (e.g., antibiotics), EUS-guided drainage may be omitted. Conversely, even before 4-5 weeks from onset, early drainage is allowed if conservative treatment is deemed insufficient by the attending physician. In principle, intervention decisions should be discussed with the expert panel.

괴사성 췌장염의 내시경적 중재 시기는 캡슐화 정도에 따라 결정되며, EUS 유도 배액은 급성 췌장염 발병 시점부터의 간격에 따라 결정됩니다.