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Predictors of outcome of prematurely born infants with pulmonary interstitial emphysema
Author(s) -
Williams Emma,
Dassios Theodore,
Clarke Paul,
Chowdhury Olie,
Greenough Anne
Publication year - 2019
Publication title -
acta paediatrica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 115
eISSN - 1651-2227
pISSN - 0803-5253
DOI - 10.1111/apa.14400
Subject(s) - medicine , ventilation (architecture) , gestational age , tidal volume , oxygenation index , oxygenation , bronchopulmonary dysplasia , lung volumes , respiratory minute volume , anesthesia , cardiology , respiratory system , lung , pregnancy , mechanical engineering , biology , engineering , genetics
Aim To determine how oxygenation, ventilation efficiency and tidal volume requirements changed with the development of pulmonary interstitial emphysema (PIE) and whether in affected patients a composite gas exchange index predicted death or bronchopulmonary dysplasia (BPD). Methods Infants who developed PIE from 2010 to 2016 were identified. The oxygenation index (OI), ventilation efficiency index (VEI), ventilation to perfusion ratio and inspiratory tidal volume were calculated before radiological evidence of PIE (pre‐PIE) and at the worst PIE radiographic appearance (PIE‐worst). Results Thirty infants, median (IQR) gestational age of 24.6 (24.3–26.7) weeks were assessed. Their age at pre‐PIE was 11 (6–19) days and 23 (13–42) days at PIE‐worst. Compared to pre‐PIE, at PIE‐worst, the OI was higher [14.5 (10.7–19.2) vs 4.8 (3.1–6.1), respectively, p < 0.001], VEI was lower [0.01 (0.01–0.11) vs 0.16 (0.13–0.19), respectively, p < 0.001], ventilation to perfusion ratio was lower [0.15 (0.11–0.40) vs 0.26 (0.20–0.37), p = 0.033] and tidal volume was higher [9.9 (7.2–13.1) vs 6.4 (5.5–6.8) mL/kg, p = 0.007]. An OI >11.4 at PIE‐worst predicted death or BPD with 80% sensitivity and 100% specificity. Conclusion Development of PIE was associated with poorer oxygenation and ventilation efficiency despite increased tidal volumes. The OI at PIE‐worst predicted death or BPD.