Fig. 2From: Management of acute respiratory failure in interstitial lung diseases: overview and clinical insightsDiagnostic work-up of acute respiratory failure in a known Interstitial Lung Disease. Footnotes: ARF = acute respiratory failure; ILD = interstitial lung disease; AE-ILD = acute exacerbation of ILD; CT = computed tomography; NT-proBNP = N-terminal pro b-type natriuretic peptide; FBS = fiberoptic bronchoscopy; BAS = bronchial aspirate; BAL = bronchoalveolar lavage; RT-PCR = real-time polymerase chain reactionBack to article page