Materials and Methods
We conducted a single-center retrospective study of 75 children from the
tracheostomy and chronic ventilator-dependent clinic at St. Louis
Children’s Hospital. Participants were initially enrolled from clinic
for the purpose of prospectively following their clinical course with
Washington University in St. Louis IRB approval, IRB #201409115. A
separate IRB submission was made for retrospective chart review for this
specific study and was considered exempt, IRB #202003084. The data
obtained ranged from years 1999-2016 and were logged into a RedCap
database.