Bronchopulmonary Dysplasia and Ventilation-Associated Outcomes After Pediatric Tracheostomy

Objectives: To determine the time to ventilator liberation and decannulation after tracheostomy placement in children with bronchopulmonary dysplasia (BPD) and pulmonary hypertension. Methods: A prospective cohort study included all children (<18 years old) who underwent tracheostomy between 2015 and 2021 with or without a diagnosis of BPD. The primary outcome measures were times to mechanical ventilator liberation, tracheostomy decannulation, or death with tracheostomy in place. Patient demographics, associated comorbidities, and outcomes were compared between groups. Results: A total of 318 children met inclusion with a median (interquartile, IQR) age at tracheostomy of 6.9 (IQR: 4.1 – 49.2) months and 54% (N=170) were male. A diagnosis of BPD was made for 43% (N=136) and this group was younger at tracheostomy placement (5.2 vs. 24.5 months, P<.001) and more often had pulmonary hypertension (65% vs. 24%, P<.001) than children without BPD. Children with BPD spent a median of 2.92 years (IQR: 1.60 – 4.03) on mechanical ventilation compared to 1.84 years (IQR: 0.84 – 3.60) for children without BPD ( P=.003). Unadjusted estimation of time to decannulation was longer for children with BPD (HR=0.92, 95% CI: 0.62 – 1.38). The adjusted survival analysis for time to mortality included pulmonary hypertension as a variable of significance (aHR= 2.5, 95% CI: 1.43 – 4.40). Conclusion: The presence of BPD is associated with an increased duration of mechanical ventilation and time to tracheostomy decannulation. Pulmonary hypertension is associated with an increased mortality risk among this vulnerable population of children.