Synopsis
Recognise pancreatic secretions escaping through a duct leak or fistula, distinguish spontaneous from postoperative definitions, and select supportive and anatomical treatment according to duct continuity.
- Pancreatic duct disruption can cause enzyme-rich ascites, a pleural communication, an external fistula or recurrent collections.
- Investigate new ascites with appropriate fluid analysis; a low albumin gradient and very high ascitic amylase support a pancreatic source in the right context.
- Pancreatic ascitic amylase is typically >1000 IU/L or >6 times serum. After pancreatic surgery, the separate ISGPS criterion is drain amylase >3 times the institutional serum upper limit from day 3 onward, plus an attributable clinical consequence for a clinically relevant fistula.
Key red flags
Blood in an external drain, gastrointestinal bleeding or a sudden haemoglobin fall.
Fever with haemodynamic deterioration, a worsening abdomen or organ dysfunction.
Recurrent large pleural effusion, breathlessness or substantial ongoing external fluid loss.
Persistent fluid from a drain or wound after necrotizing pancreatitis or pancreatic intervention may contain pancreatic secretions. Measure volume and character, inspect surrounding skin and record fluid amylase in its proper context. A fall in output is encouraging only if the patient improves; abrupt cessation with fever or pain may represent drain blockage and an undrained collection and requires prompt pancreatic or surgical reassessment.
Investigation priorities
Determine the mechanism of new or unexplained ascites.
Management branches
A 60-year-old woman develops recurrent abdominal distension five weeks after pancreatitis. She is afebrile, has no liver-disease signs and has required repeated symptomatic fluid removal.
- Diagnostic fluid shows amylase 6800 IU/L with serum amylase 110 IU/L; serum albumin is 34 g/L and ascitic albumin 27 g/L, giving a low gradient of 7 g/L. The findings support pancreatic ascites. CT excludes a bleeding complication and MRCP suggests a partial duct disruption with continuity of the upstream gland. The team restores nutritional intake, monitors renal function and refers her to the pancreatic centre.
- At therapeutic ERCP, the endoscopist identifies and bridges the partial leak with a pancreatic stent. Within a week her abdominal distension and early satiety improve, and she no longer requires therapeutic paracentesis. A named endoscopist records the planned reassessment of duct healing and stent removal rather than leaving an open-ended device prescription.