CPAP group (N=17) | MV group (N=22) | p Value | |
---|---|---|---|
PCA (weeks) at time of testing | 48.4 (5.3) | 46.9 (3.4) | 0.312 |
Body weight at time of testing (g) | 4293 (815) | 4111 (656) | 0.447 |
Tidal volume, VT (ml/kg) | 5.50 (0.94) | 5.57 (0.86) | 0.823 |
Respiratory rate, RR (1/min) | 41 (5.6) | 48 (8.8) | 0.007* |
Minute ventilation, V’E (ml/min/kg) | 223 (33.5) | 265 (55.5) | 0.009* |
Respiratory compliance, Crs (ml/cm H2O/kg) | 0.99 (0.20) | 0.82 (0.15) | 0.008* |
Respiratory resistance, Rrs (cm H2O/l/s) | 66.6 (19.3) | 70.3 (25.1) | 0.638 |
Respiratory time constant, Trs (ms) | 307 (133.4) | 231 (87.0) | 0.043* |
Elastic work of breathing per minute (mJ/kg/min) | 64.3 (18.8) | 93.3 (33.7) | 0.004* |
Functional residual capacity, FRC (ml/kg) | 19.3 (5.68) | 17.7 (2.77) | 0.232 |
CPAP, continuous positive airway pressure; MV, mechanical ventilation; PCA, post-conceptional age.
Values are mean (SD).
↵* Statistically significant.