From: Pediatric hypersensitivity pneumonitis: literature update and proposal of a diagnostic algorithm
Criteria (> 2 are needed for the definition of acute exacerbation) | • Increase in respiratory rate > 20% from baseline • Onset or increase of dyspnea • Newly developing or increased abnormalities on chest imaging • Onset/increase of oxygen demand to achieve baseline saturation (at rest and/or during exercise) • Need for a supplementary level of ventilatory support (in addition to oxygen) • Decrease in vital capacity at spirometry in children able to perform the tests (> 10%) from baseline • Reduced exercise tolerance in children able to perform the tests (including desaturation) |