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Table 4 Diagnostic criteria for ventilator-associated pneumonia in order of occurrence

From: Ventilator associated pneumonia: comparison between quantitative and qualitative cultures of tracheal aspirates

Diagnostic criteria n (%)
Leukocytosis 26 (68.4%)
Fever 24 (63.1%)
Purulent tracheal secretion 22 (57.8%)
Decrease of at least 10% in PaO2/FiO2 ratio 16 (42.1%)
Rales or dullness to percussion on chest examination 9 (23.6%)
Leucopenia 4 (10.5%)
Blood positive cultures 4 (10.5%)
Hypothermia 2 (5.2%)
  1. FiO2, fractional inspired oxygen; PaO2, arterial oxygen tension.