Mid and Standard Frequency Ventilation in Infants With Respiratory Distress Syndrome

In preterm infants with respiratory distress syndrome (RDS) who are ventilated in the first
48 hours after birth, mid frequency ventilation (MFV) strategy, compared with standard
frequency ventilation (SFV) strategy, in the first week after birth, will increase the number
of days alive and ventilator-free in the 28 days after birth.

This will be a randomized controlled trial with a 1:1 parallel allocation of infants to MFV
or SFV using stratified permuted block design. Randomization will be stratified by
gestational age (≥ 23 weeks to ˂ 26 weeks, ≥ 26 weeks to ≤ 28+6/7 (less than 29 weeks), and
29+0/7 to 36+6/7). Randomization of twins and higher orders (when eligible) will be to the
same group.

Inborn and outborn infants who are receiving assisted ventilation for RDS in the first 48
hours after birth will be included in this study. Infants with any of the following: a major
malformation, a neuromuscular condition that affects respiration, terminal illness or
decision to withhold or limit support will not be eligible.

Infants will be randomized to MFV versus SFV. MFV delivered at rates > 60 per minute and ≤
150 per minute, with patient triggered ventilation and pressure support.

SFV delivered at rates < 60 per minute and ≥ 20 per minute, with patient triggered
ventilation and pressure support.

Inclusion Criteria:

- Infants ≥ 23+0/7 weeks and ≤ 36+6/7 who are intubated and mechanically ventilated for
respiratory distress syndrome (defined by use of surfactant) within 48 hours after
birth

- Infants whose parents/legal guardians have provided consent for enrollment

- Inborn or outborn infants transferred to this center before 48 hours after birth

- Ventilator rate ≤ 80 per minute prior to enrollment

Exclusion Criteria:

- a major malformation, a neuromuscular condition that affects respiration, or terminal
illness or decision to withhold or limit support.