Serum-ascites albumin gradient (SAAG)
Identifies portal hypertension as the cause of ascites.
Inputs
0 of 2When to use
- New ascites after diagnostic paracentesis.
Pearls and pitfalls
- 1.1 g/dL or higher: portal hypertension (about 97% accurate). Ascitic protein below 2.5 suggests cirrhosis; 2.5 or higher suggests cardiac ascites.
Why use
The first branch in ascites workup.
SAAG = serum albumin − ascitic albumin (same day)