Postparacentesis Syndrome: Diagnosis and Management

Definition and Pathophysiology

The American Association for the Study of Liver Diseases recommends that the administration of albumin at a dose of 6-8 g per liter of ascites extracted is fundamental for preventing postparacentesis syndrome in patients undergoing large-volume paracentesis (>5 liters), as it significantly reduces the associated morbidity and mortality 1, 2
Large-volume paracentesis causes significant hemodynamic changes, including a marked reduction in intra-abdominal pressure and inferior vena cava pressure, a decrease in right atrial pressure, an increase in cardiac output, and a decrease in pulmonary capillary pressure, which is associated with activation of the renin-angiotensin-aldosterone system 3, 4

The European Association for the Study of the Liver states that clinical manifestations of postparacentesis syndrome include deterioration of renal function, dilutional hyponatremia, hepatic encephalopathy, and hypotension, which are associated with a high risk of mortality 1, 3
The severity of postparacentesis syndrome is inversely correlated with patient survival, and diagnosis is based on the evaluation of changes in renal function, electrolyte disturbances, and neurohormonal activation 1, 3

For paracentesis >5 liters, the administration of albumin at a dose of 6-8 g per liter of ascites extracted is recommended to prevent postparacentesis syndrome, and the infusion should be performed after completing paracentesis 1, 2, 5, 6
For paracentesis <5 liters, albumin replacement is generally not required, but it may be considered in high-risk patients, such as those with acute-on-chronic liver failure or a high risk of acute kidney injury postparacentesis 1, 2, 5
The risk of postparacentesis syndrome increases with the extraction of >8 L of fluid in a single session, and limiting the volume of paracentesis to <8 L per session may better preserve renal function and survival 1, 3

The use of artificial plasma expanders is associated with a significantly higher activation of the renin-angiotensin-aldosterone system, and albumin has been shown to be superior in reducing the incidence of postparacentesis syndrome, hyponatremia, and mortality 3, 4, 6, 7

In case of postparacentesis syndrome, close monitoring of renal function and electrolytes is recommended, and fluid restriction (<1,000 mL/day) is advised for the treatment of hyponatremia (<125 mEq/L) 1
Continuation of dietary sodium restriction (<2 g/day) is recommended to reduce the rate of ascites accumulation 1

Postparacentesis syndrome is not spontaneously reversible and is associated with a shorter time to first readmission and lower survival, and consideration of transjugular intrahepatic portosystemic shunt (TIPS) or liver transplantation may be necessary in selected patients 1, 6, 7