Table 3

Pleural fluid studies

Laboratory testResults
pH7.3
Glucose114 mg/dL
Protein4.4 g/dL
Lactate dehydrogenase741 U/L
White cell count
Segmented neutrophils
Lymphocytes
Monocyte/macrophage
0.920×109 cells/L
83%
10%
7%
CultureNo growth
Gram stain1+ white blood cells, no bacteria seen