Pediatric Acute Respiratory Distress Syndrome Diagnostic Criteria

Core Diagnostic Requirements

Bilateral opacities on chest radiograph or CT scan are required for PARDS diagnosis, with infiltrates not fully explained by effusions, lobar/lung collapse, or nodules, as recommended by the American Academy of Pediatrics 1
Lung ultrasound shows bilateral diffuse areas of reduced lung aeration with interstitial syndrome, consolidations, pleural line abnormalities, and possible pleural effusion, according to the American Thoracic Society 2
Respiratory failure not fully explained by cardiac failure or fluid overload is a key component of PARDS diagnosis, with echocardiography recommended to exclude cardiogenic pulmonary edema, as suggested by the American Heart Association 1

Arterial blood gas is required to determine PaO₂/FiO₂ ratio and assess for metabolic or respiratory acidosis, as recommended by the American College of Chest Physicians 1
Chest radiograph or CT is necessary to document bilateral opacities, according to the American College of Radiology 1
Echocardiography is recommended when no clear ARDS risk factor exists to exclude cardiogenic causes, as suggested by the American Society of Echocardiography 1
Lung ultrasound is useful for semi-quantitative evaluation of lung aeration and can help guide respiratory interventions, according to the American Institute of Ultrasound in Medicine 2

The American Academy of Pediatrics recommends using the PaO₂/FiO₂ ratio to classify PARDS severity, with mild PARDS defined as 200 mmHg < PaO₂/FiO₂ ≤ 300 mmHg, moderate PARDS defined as 100 mmHg < PaO₂/FiO₂ ≤ 200 mmHg, and severe PARDS defined as PaO₂/FiO₂ ≤ 100 mmHg 3

Meconium aspiration syndrome in neonates is a recognized cause of neonatal ARDS, according to the American Academy of Pediatrics 2

The American College of Chest Physicians recommends always calculating PaO₂/FiO₂ ratio with patients on at least 5 cmH₂O of PEEP to avoid misclassification of severity 3
Diffuse interstitial lung diseases, diffuse pulmonary infections, and drug-induced lung injury can present identically to ARDS and require specific treatments, as noted by the American Thoracic Society 1
Cardiogenic pulmonary edema must be actively excluded through clinical assessment and echocardiography, as recommended by the American Heart Association 1