Table 1.

Accuracy of the BLUE protocol (adopted from Lichtenstein 2015, p)

Cause of dyspnea	Sensitivity (%)	Specificity (%)
Acute hemodynamic pulmonary edema	97	95
Exacerbated COPD or severe acute asthma	89	97
Pulmonary embolism	81	99
Pneumothorax	88	100
Pneumonia	89	94