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GI & Liver

Serum–Ascites Albumin Gradient (SAAG)

Classifies ascites as portal-hypertensive or not, from serum and ascitic albumin.

Inputs

FieldUnitNotes
Serum albumin g/dL 0.5–7
Ascitic fluid albumin g/dL 0–7

FAQ

What is the Serum–Ascites Albumin Gradient (SAAG)?

Classifies ascites as portal-hypertensive or not, from serum and ascitic albumin.

What inputs does the Serum–Ascites Albumin Gradient (SAAG) need?

Serum albumin (g/dL), Ascitic fluid albumin (g/dL).

Related guides

Serum–Ascites Albumin Gradient (SAAG): Sorting Portal from Non-Portal Ascites

SAAG = serum albumin − ascitic albumin. A gradient ≥1.1 g/dL indicates portal hypertension with ~97% accuracy; <1.1 points to a non-portal cause. Formula, cut-off, example, pitfalls.

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