Evaluation and Management of Abdominal Ascites

Initial Clinical Assessment

The American Association for the Study of Liver Diseases recommends assessing for risk factors, including alcohol use, viral hepatitis, heart failure, malignancy, tuberculosis, renal disease, and pancreatitis, in patients with new-onset ascites or worsening ascites 3, 4
Physical examination findings, such as shifting dullness, have 83% sensitivity and 56% specificity for detecting ascites, and require approximately 1500 mL of fluid to be detectable 3, 1
Jugular venous distension suggests cardiac ascites rather than cirrhotic ascites 3

The European Association for the Study of the Liver recommends performing diagnostic paracentesis with ascitic fluid analysis immediately in all patients with new-onset ascites or hospitalized patients with worsening ascites, as it is the most rapid and cost-effective method to determine etiology and detect life-threatening complications like spontaneous bacterial peritonitis 1, 2
The procedure should be performed with a volume of 10-20 mL for diagnostic purposes, and the site should be approximately 15 cm lateral to the umbilicus in the left or right lower quadrant 4, 5
Complications occur in only ~1% of cases, and serious complications like hemoperitoneum or bowel perforation are rare (1/1000) 3, 4

The American Association for the Study of Liver Diseases recommends sending serum-ascites albumin gradient (SAAG) on all patients, as a SAAG ≥11 g/L indicates portal hypertension with 97% accuracy 6, 1
Ascitic fluid neutrophil count >250 cells/mm³ indicates spontaneous bacterial peritonitis (SBP) 4, 5, 1
Total protein concentration <15 g/L indicates increased risk of SBP 4, 6, 7

The European Association for the Study of the Liver recommends sodium restriction and diuretics as the cornerstone of treatment for portal hypertensive ascites (SAAG ≥11 g/L) 1, 7
Refractory ascites is defined as ascites unresponsive to sodium restriction and intensive diuretics, or recurs ≥3 times within 12 months, and options include repeated large-volume paracentesis or transjugular intrahepatic portosystemic shunt (TIPS) 1, 7

The American Association for the Study of Liver Diseases recommends never assuming alcoholic patients have alcoholic liver disease, and always investigating other causes 4, 5
Delaying paracentesis for coagulopathy correction is not recommended, as routine FFP/platelet transfusion is not data-supported 3, 4
Missing SBP can increase mortality, and it is essential to perform paracentesis promptly in patients with suspected SBP 3, 1, 2