Albumin Therapy for Spontaneous Bacterial Peritonitis in Cirrhosis

Standard Weight‑Based Dosing Protocol

• For adult cirrhotic patients with ascites and SBP, give 1.5 g/kg of 20 % albumin within 6 hours of diagnosis, followed by 1.0 g/kg on day 3; calculations should use the patient’s estimated dry weight. 1

Evidence Supporting the Regimen

• Meta‑analysis shows albumin reduces the risk of renal impairment by ≈72 % (pooled RR 0.28, 95 % CI 0.16‑0.50) when added to antibiotics for SBP. 1
• The same pooled data demonstrate a ≈47 % reduction in mortality (pooled RR 0.53, 95 % CI 0.36‑0.79) with albumin adjunctive therapy. 1
• Without albumin, up to 30 % of SBP patients develop renal dysfunction, which is the strongest predictor of death. 1

Modified Dosing for Patients with Renal Impairment

• Elevated or rising serum creatinine: continue the full weight‑based regimen (1.5 g/kg day 1, 1.0 g/kg day 3). 1
• Normal and stable creatinine: lower albumin doses may be effective, but evidence remains controversial. 1
• A retrospective cohort of 88 patients found that total albumin doses exceeding 87.5 g (>4 × 100 mL of 20 % solution) were linked to worse outcomes, likely due to fluid overload. 1

Comparison with Large‑Volume Paracentesis Dosing

The SBP regimen must not be confused with the volume‑based paracentesis protocol. 1

Administration Guidelines

• Albumin should be infused after the first dose of antibiotics has been administered. 1
• Use hyperoncotic solutions (20 % or 25 % albumin); 5 % solutions are insufficient. 1
• Early administration is critical—do not delay the day 1 dose beyond 6 hours. 1
• Both the day 1 and day 3 doses are required for optimal benefit; omission of the day 3 dose compromises outcomes. 1

Monitoring and Safety

• Daily serum creatinine to detect acute kidney injury. 1
• Daily serum sodium to identify hyponatremia. 2
• Vigilantly monitor for signs of fluid overload, especially in patients with cirrhotic cardiomyopathy or baseline renal dysfunction. 1

Common Pitfalls to Avoid

• Do not apply the paracentesis volume‑based dose (8 g/L) to SBP patients. 1
• Do not postpone albumin infusion beyond the 6‑hour window after SBP diagnosis. 1
• Do not skip the day 3 dose; both doses are essential for the therapeutic effect. 1

Mechanistic Benefit (Supporting Evidence)

• Albumin administration prevents post‑infection circulatory dysfunction and hepatorenal syndrome in SBP. 2

Albumin Infusion Guidelines in Clinical Practice

Indications for Albumin Infusion

• The American Thoracic Society recommends albumin infusion for large-volume paracentesis >5 liters at 8 g per liter of ascites removed to prevent post-paracentesis circulatory dysfunction 3, 4, 5, 6
• The American Thoracic Society suggests albumin dosing for spontaneous bacterial peritonitis: 1.5 g/kg within 6 hours of diagnosis, followed by 1.0 g/kg on day 3 5, 6
• The American Association for the Study of Liver Diseases recommends albumin 10-20 grams IV daily for up to 20 days in combination with vasoconstrictors for hepatorenal syndrome 6

Contraindications for Albumin Infusion

• The American Thoracic Society advises against administering albumin in chronic nephrosis, chronic cirrhosis with hypoalbuminemia alone, critically ill patients for volume replacement, ARDS or thermal injuries, routine critical care, dialysis, or cardiovascular surgery, and preterm neonates 3, 4, 7

Albumin Infusion Dosage and Administration

• For paracentesis >5 liters, administer 8 g albumin per liter of ascites removed, which translates to 100 mL of 20% albumin per 3 liters removed 6
• For spontaneous bacterial peritonitis, administer 1.5 g/kg albumin within 6 hours of diagnosis, followed by 1.0 g/kg on day 3 5, 6
• For hepatorenal syndrome, administer 10-20 grams albumin IV daily for up to 20 days in combination with vasoconstrictors 6