|
 |
 |
 |
A low rate of chronic lung disease (CLD) was observed in the pre-surfactant era in a center that used nasal CPAP (NCPAP) as first line therapy for preterm infants with respiratory distress.1 Without evidence of benefit or safety, this method was widely adopted. Retrospective cohort studies reported improved pulmonary outcome with the use of CPAP.2-5
Recently, the American Academy of Pediatrics (AAP) Committee on Fetus and Newborn summarized that CPAP may reduce the need for surfactant and incidence of CLD without increased morbidity although large randomized controlled trials are lacking.6 The feasibility of undertaking such studies was proven by Finer et al. However, his multicenter trial revealed that the application of CPAP by facemask did not decrease the rate of intubation in the DR.
The COIN Trial, discussed in the context of BPD in the eNeonatal Review March 2008 issue, deserves mention here. This landmark 2008 New England Journal of Medicine report by Morley et al,7 tested the hypothesis that the use of early NCPAP rather than intubation and mechanical ventilation would reduce the incidence of death or chronic lung disease (CLD) in very preterm infants, concluded that early NCPAP in infants born at 25 to 28 weeks gestation showed similar incidence of death or CLD as compared with intubation. Importantly, an increased rate of pneumothorax was found, with the majority of these air leaks occurring beyond 24 hours. Therefore, experienced staff is mandatory for detection of increasing dyspnea, a clinical sign often preceding air leaks. Indeed, the success of early CPAP has been found to improve with staff experience.8 [Editor’s Note: Clinicians may directly access the review of the COIN Trial by visiting our archives online].
Different strategies have been proposed that might improve the results of NCPAP: noninvasive lung recruitment, the use of noninvasive intermittent mandatory ventilation, and prophylactic surfactant administration followed by NCPAP.
te Pas reported on a low rate of intubation (37%) and a decreased rate of CLD or death when a lung recruitment intervention preceded CPAP compared to standard treatment (facemask and hand bagging). Although large tidal volumes, applied without pressure limitation to intubated animals, caused lung injury,9 these interventions are different from the pressure-controlled, sustained inflations by nasopharyngeal tube used by te Pas or Lindner et al,10 who did not observe clinical signs of increased lung injury.
In the study by Kugelman et al, noninvasive intermittent mandatory ventilation was found to reduce the rate of intubation and CLD compared to NCPAP. Improved pulmonary outcome was reported by Geary et al with prophylactic surfactant application and rapid extubation to NCPAP in an historical cohort study. While these techniques are promising, to prove benefit and safety, further controlled trials are necessary.
The data reviewed herein appear to lead to the conclusion that a majority of very immature infants (≥ 25 weeks gestation) can be stabilized using NCPAP delivered by nasal prongs in the DR, and that surfactant replacement should be reserved for infants who fail NCPAP.
References
| 1. |
Avery ME, Tooley WH, Keller JB, et al. Is chronic lung disease in low birth weight infants preventable? A survey of eight centers. Pediatrics. 1987;79(1):26-30.
|
 |
| 2. |
Poets CF, Sens B. Changes in intubation rates and outcome of very low birth weight infants: a population-based study. Pediatrics. 1996;98(1):24-27. |
 |
| 3. |
Lindner W, Vossbeck S, Hummler H, et al. Delivery room management of extremely low birth weight infants: spontaneous breathing or intubation? Pediatrics. 1999;103(5 Pt 1):961-967. |
 |
| 4. |
Van Marter LJ, Allred EN, Pagano M, et al. Do clinical markers of barotrauma and oxygen toxicity explain interhospital variation in rates of chronic lung disease? Pediatrics. 2000;105(6):1194-1201. |
 |
| 5. |
Vanpée M, Walfridsson-Schultz U, Katz-Salamon M, et al. Resuscitation and ventilation strategies for extremely preterm infants: a comparison study between two neonatal centers in Boston and Stockholm. Acta Pediatr. 2007;96(1):10-16. |
 |
| 6. |
Engle WA; AAP Committee on Fetus and Newborn. Surfactant replacement therapy for respiratory distress in the preterm and term neonate. Pediatrics. 2008;121(2):419-432. |
 |
| 7. |
Morley CJ, Davis PG, Doyle LW, Brion LP, Hascoet JM, Carlin JB, for the COIN trial Collaborators. Nasal CPAP or intubation for the very preterm infants at birth: The COIN trial. N Engl J Med. 2008;358:700-708. |
 |
| 8. |
Aly H, Massaro AN, Patel K, et al. Is it safer to intubate premature infants in the delivery room? Pediatrics. 2005;115(6):1660-1665. |
 |
| 9. |
Björklund LJ, Ingimarsson J, Curstedt T, et al. Lung recruitment at birth does not improve lung function in immature lambs receiving surfactant. Acta Anaesthesiol Scand. 2001;45(8):986-993. |
 |
| 10. |
Lindner W, Högel J, Pohlandt F. Sustained pressure-controlled inflation or intermittent mandatory ventilation in the delivery room? A randomised controlled trial on initial respiratory support via nasopharyngeal tube. Acta Pediatr. 2005;94(3):303-309. |
|
|
 |
|
 |
|