Pleural fluid transudate total protein to serum ratio typically ≤ 0.5.
Pleural fluid exudate total protein to serum total protein ratio typically > 0.5.
Ascitic fluid total protein is a reflection of serum protein concentration and may be useful in differentiating secondary bacterial peritonitis from spontaneous bacterial peritonitis when two of three criteria are met in ascetic fluid:
Ascitic fluid total protein may be elevated > 2.5 g/dL in patients with high Albumin gradient ascites caused by heart failure.
Refrigerated - 5 days