Conclusions:
In the preterm population, oscillometry is a feasible and clinically
useful supportive test for those unable to perform spirometry or where
bronchial hyperresponsiveness is suspected in the presence of normal
spirometry results. A bronchodilator response by spirometry and
oscillometry reflects related but distinct physiological changes in the
airways of those born preterm, and these tests should not be used
interchangeably. Our observations that the response to a bronchodilator
as measured by oscillometry and spirometry may reflect different aspects
of airway physiology warrants further investigation to advance our
understanding of preterm lung disease.