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Ventilator-Associated Pneumonia: Sensitivity and Specificity

Introduction: This reflects the clinical entity of a pneumonia developing while a patient is on a ventilator (not a Community-Acquired Pneumonia). Thus, this will occur after the patient has been on the ventilator for days, not as the initial presenting disease.

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Tags: Infection Pulmonary Tag this Diagnosis.

The sensitivity and specificity of findings for Ventilator-Associated Pneumonia are listed below. See the left navigation bar to change the display.

Pre-Test Probability (Prevalence): %. Post-Test Probability (Predictive Value): %. Switch to display mode.
**Note that calculating probabilities from more than one finding is inherently inaccurate because findings are not independent. (For example, using two positive findings that share a common pathogenesis is likely to overestimate the true probability.)
Specific Findings
FindingResult SensitivitySpecificity
[ + ] Air Bronchogram + 0 - 16.9%95.6%
[ + ] Bronchial Aspirate Culture + 0 - 60.7%93.7%
Sensitive Findings
FindingResult SensitivitySpecificity
[ + ] Neutrophilic BAL Sensitivity = 95%
Negative Findings
FindingResult SensitivitySpecificity
[ + ] Atelectasis + 0 - 23.3%69.7%
Poorly Diagnostic Findings
FindingResult SensitivitySpecificity
[ + ] Fever, Leukocytosis, and Purulent Sputum + 0 - 69.1%75.3%
[ + ] BAL Culture + 0 - 49.7%64.5%
[ + ] hearing loss + 0 - 49.4%58.8%
[ + ] Air Bronchogram + 0 - 83%58.5%
[ + ] Leukocytosis + 0 - 60.4%53.6%
[ + ] Hypoxemia + 0 - 52.1%52.6%
[ + ] Chest X-Ray + 0 - 81.9%51.9%
[ + ] Intracellular Bacteria in BAL + 0 - 50%50%
[ + ] Purulent Sputum + 0 - 72%45%