Evaluate cause: A thoracentesis involves removing fluid from the pleural cavity. Laboratory values obtained from the fluid may enable a doctor to determine the cause of the fluid accumulation. Amylase present in the fluid could mean either pancreatitis or, more rarely, esophageal perforation. Glucose<40mg/dl, possible infection, >40mg/dl probably not infectious.
Answered 11/21/2014
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Fluid: Amylase is to test to see if it is related to the pancreas. The glucose can help determine if it is related to infection.
Answered 2/28/2013
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