calculate_saag: Serum-Ascites Albumin Gradient (SAAG)
Description
Calculates the Serum-Ascites Albumin Gradient (SAAG) to help determine the etiology of ascites. The gradient is the difference between the serum albumin concentration and the ascites fluid albumin concentration. It distinguishes between ascites caused by portal hypertension and other causes.
Usage
calculate_saag(serum_albumin, ascites_albumin)
Value
A list containing:
SAAG_Score
The calculated gradient (Serum - Ascites).
Interpretation
Diagnostic classification based on the 1.1 g/dL threshold.
Arguments
serum_albumin
Numeric. Serum Albumin level in g/dL.
ascites_albumin
Numeric. Ascites fluid Albumin level in g/dL.
References
Runyon BA, Montano AA, Akriviadis EA, et al. The serum-ascites albumin gradient is superior to the exudate-transudate concept in the differential diagnosis of ascites. Ann Intern Med. 1992;117(3):215-220. doi:10.7326/0003-4819-117-3-215