Cell Ct, Serous Fluid
Evaluate serous fluid for the presence of RBCs (semiquantitative), WBCs, differential, and for physical appearance
To minimize unnecessary laboratory testing it is important to have a clear differential diagnosis in mind. Results of these studies should always be correlated with clinical findings and any other ancillary studies to determine an accurate diagnosis.
1 to 2 mL
0.5 mL (Note: This volume does not allow for repeat testing.)
Lavender-top (EDTA) tube or green-top (heparin) tube
ollow standard collection procedures. Heparin should be added to the syringe used for aspiration of pleural or pericardial fluid to prevent clotting.
Refrigerate at 2°C to 8°C; stable 48 hours.
Room temperature Unstable
Refrigerated 2 days (48 hours)
Freeze/thaw cycles Unstable
Room temperature storage; frozen specimen; improperly labeled specimen; quantity not sufficient for analysis; gel-barrier tube