Pleural:

Pleural fluid LDH to serum LDH ratio ≤ 0.6 or less than 2/3 the upper limit of normal serum LDH is consistent with transudative effusions, while pleural fluid LDH to serum LDH ratio > 0.6 is consistent with exudative effusions.

Peritoneal:

Ascitic fluid LDH may be useful in differentiating secondary Bacterial peritonitis from spontaneous bacterial peritonitis when at least two of three criteria are met in ascites fluid: 

• Total Protein > 1.0 g/dL
• Glucose < 50 mg/dL
• LDH > upper reference limit for serum

Sterile container

1. Centrifuge for 5 -10 minutes to remove any cellular material
2. Transfer supernatant to a False bottom plasma/serum transport vial/tube (AHL) 
3. Refrigerate

False bottom plasma/serum transport vial/tube (AHL)

• Source (indicate on order and on transport container)

Refrigerated - 3 days

• Improper labels (unlabeled or mislabeled)
• Hemolysis (some procedures)
• Delay in transport
• Improper storage temperature affecting results
• Improper container
• Leaking container resulting in compromised specimen
• Quantity not sufficient (QNS)

Enzymatic

Undefined