Interstitial lung disease guideline

BAL, bronchoalveolar lavage; FEV 1 , forced expiratory volume in 1 s; FVC, forced vital capacity; HRCT, high resolution computed tomography; ILD, interstitial lung disease; P(A-a)O 2 , difference between alveolar and arterial pressure; PaO 2 , arterial oxygen tension; TLCO, carbon monoxide transfer factor; VC, vital capacity. *Modified from American Thoracic Society/European Respiratory Society recommendations. 2 {In the immunocompetent adult the presence of all of the major diagnostic criteria as well as at least three of the four minor criteria increases the likelihood of a correct clinical diagnosis of IPF. {The requirement for transbronchial lung biopsy/bronchoalveolar lavage within the diagnostic criteria for IPF is currently under review.