Ascites fluid total protein (AFTP)

  • <2.5 (Pre- & Intrahepatic)
  • ≥2.5 (Post-hepatic)

  • useful when SAAG ≥1.1 to →
    • distinguish cirrhosis (AFTP <2.5 g/dL) ← from
      • Ascitic protein <2.5 g/dL
      • Cirrhosis
      • Late Budd-Chiari syndrome
      • Massive liver metastases
    • cardiac ascites (AFTP ≥2.5 g/dL).
  • Low AFTP (<1 g/dL) assoc. w/ ↑ risk of SBP (see “Cirrhosis” for guidelines on SBP Ppx based on AFTP).
    • I Heart failure/constrictive pericarditis
    • Early Budd-Chiari syndrome
    • IVC obstruction, SVC syndrome
    • Sinusoidal obstruction syndrome