|Available:||Daily, 24 hours|
|Turnaround:||Routine: 2 hours, STAT: 30 minutes|
|Specimen:||Fluid: pleural, pericardial, peritoneal, ventricular|
|Container:||Sterile spinal fluid collection tube or sterile container|
|Temperature:||Must be delivered to laboratory within 30 minutes after collection.|
|Rejection:||In transport longer than 30 minutes.|
|Normal:||Transudate: < 3000.0 mg/dL. Exudate: > 3000.0 mg/dL.|
|Uses:||Pathological accumulations of fluid elsewhere vary greatly in protein content; they may be ultrafiltrates with low protein concentrations and scant amounts of high-molecular-weight proteins, or they may be serious fluids with high protein concentrations and significant amounts of large proteins such as immunoglobulins. These fluids are divided arbitrarily according to their protein concentration into transudates, with total protein < 3000.0 mg/dL, and exudates, with total protein concentrations > 3000.0 mg/dL. Transudates ordinarily reflect changes in permeability of filtering membranes, whereas exudates usually result from infection or malignancy; the latter may contain large numbers of leukocytes or malignant cells.|
|Limitations:||Specimen too viscous to spin down for separation of cells and fluid.|
|Method:||Biochromatic endpoint (CU2+ binding)|
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