High frequency ventilation trial. Nine year follow up of lung function

Area of Science:

• Neonatal Medicine
• Pediatric Pulmonology
• Respiratory Physiology

Background:

• The High-Frequency Ventilation (HIFI) trial investigated hyaline membrane disease (HMD) and found no pulmonary outcome advantage for high-frequency ventilation (HFV) over conventional ventilation (CV) at 24 months.
• Long-term childhood lung function differences between HFV and CV in preterm infants remain less understood.

Purpose of the Study:

• To determine if there are significant differences in childhood lung function between patients ventilated with HFV versus CV.
• To assess the long-term pulmonary outcomes in survivors of neonatal lung disease.

Main Methods:

• Pulmonary function tests were conducted on 32 children (aged 8-9 years) who participated in the HIFI trial.
• Patients were analyzed based on ventilation mode (HFV vs. CV) and diagnosis (bronchopulmonary dysplasia (BPD) or HMD).
• Results were compared to 15 matched, term-born controls.

Main Results:

• Preterm infants exhibited a mildly obstructive pattern on lung function tests.
• Children with a history of asthma or bronchodilator use showed more severe obstruction.
• The prevalence of mild obstructive patterns was similar between HFV and CV groups for infants with HMD or BPD.

Conclusions:

• The mode of ventilation (HFV vs. CV) does not appear to significantly impact long-term childhood lung function in survivors of HMD or BPD.
• Factors beyond the ventilation method, such as asthma or bronchodilator use, exert a greater influence on pulmonary outcomes.