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Ascites Albumin Gradient (SAAG)

SAAG (g/L)

 

Formula

SAAG (g/L) = Serum Albumin - Ascites Albumin

SAAG ≥11 suggests presence of portal hypertension in patients with a transudative ascites.

SAAG <11 suggests absence of significant portal hypertension in patients with exudate ascites.

 

Reference

Paré P, Talbot J, Hoefs JC. Serum-ascites albumin concentration gradient: A physiologic approach to the differential diagnosis of ascites. Gastroenterology. 1983;85(2):240-244. doi:10.1016/0016-5085(83)90306-2