Calculation of SAAG is performed by measuring the serum albumin and ascitic fluid albumin concentrations simultaneously and then subtracting the ascitic fluid albumin from the serum albumin. A SAAG of >1.1 g/dL is 97% accurate in detecting portal hypertension (Fig.
People also ask, how do you calculate SAAG in ascitic fluid?
The SAAG may be a better discriminant than the older method of classifying ascites fluid as a transudate versus exudate. The formula is as follows: SAAG = (serum albumin) − (albumin level of ascitic fluid). Ideally, the two values should be measured at the same time.
Similarly one may ask, how do you read SAAG?
What is the SAAG in SBP?
The serum-ascites albumin gradient (SAAG) helps determine whether peritoneal fluid is a transudate or exudate. Theoretically it might also be helpful in the diagnosis of SBP, as the ascitic fluid would normally be expected to have a relatively high protein level.
How do you calculate PMN in ascitic fluid?
The absolute PMN count in the ascitic fluid is calculated by multiplying the total white blood cell count (or total “nucleated cell” count) by the percentage of PMNs in the differential.
What is high SAAG ascites?
The SAAG correlates with the sinusoidal pressure,6 and a SAAG ≥1.1 g/dL (high SAAG ascites) indicates a hepatic vein–portal vein pressure gradient more than 11 mm Hg (i.e., portal hypertension). High SAAG ascites is almost always caused by a sinusoidal or postsinusoidal source of the ascites.
What is low SAAG?
A low gradient (SAAG < 1.1 g/dL) indicates nonportal hypertension and suggests a peritoneal cause of ascites. Such conditions may include the following: Primary peritoneal mesothelioma. Secondary peritoneal carcinomatosis.
How is SBP diagnosed?
The diagnosis of SBP is established based on positive ascitic fluid bacterial cultures and the detection of an elevated absolute fluid polymorphonuclear neutrophil (PMN) count in the ascites (>250/mm3) without an evident intra-abdominal surgically treatable source of infection [1, 9].