🫃 Serum-Ascites Albumin Gradient (SAAG)
Determine whether ascites is due to portal hypertension with the SAAG.
Serum-Ascites Albumin Gradient (SAAG)
Serum albumin (g/dL)
Ascites albumin (g/dL)
When to use
Classify ascites in the diagnostic work-up.
How it works
SAAG = serum albumin − ascites albumin (same-day samples). ≥ 1.1 g/dL indicates portal hypertension.
Key points
- ≥ 1.1 g/dL is ~97% accurate for portal hypertension.
- Add ascitic total protein to separate cardiac from cirrhotic ascites.
- < 1.1 suggests malignancy, TB or pancreatitis.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.