ABSTRACT
Neutrophil counts were studied in 62 preterm infants receiving mechanical ventilation
for neonatal respiratory distress syndrome (NRDS). Exploratory analysis indicated
that the severity of NRDS, as demonstrated by fractional inspired oxygen (FiO2), mean airway pressure (MAP), arterial-alveolar PO2 ratio (a/APO2) and oxygenation index (OI), was correlated with percentage change of neutrophil
counts during the first 5 days of life. Further analysis demonstrated that infants
with NRDS who subsequently developed chronic lung disease (CLD) (n = 21) had statistically significant differences in variation of neutrophil counts
when compared with the remainder (n = 41) without CLD (-35.0% ± 4.3 vs. -16.9% ± 5.8, p < 0.02). It is concluded that significant variations in neutrophil counts during
the first 5 days of life may be found in infants with NRDS who subsequently develop
CLD and that these changes may have predictive value regarding the development of
CLD.
KEYWORD
CLD - neutrophil counts - preterm infant - RDS