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Prophylactic nasal continuous positive airways pressure for preventing morbidity and mortality in very preterm
P Subramaniam1, D J Henderson-Smart, P G Davis
1Dept Paediatrics, Hospital Ipoh, Ipoh, Malaysia, 30990. premasivapalan@hotmail.com
Insights
Prophylactic nasal continuous positive airway pressure (CPAP) for very preterm infants does not show significant benefits and may increase risks. More research is needed to determine its effectiveness and safety.
Area of Science:
- Neonatal Medicine
- Respiratory Support
- Clinical Trials
Background:
- Previous cohort studies suggested early nasal CPAP benefits for preterm infants.
- Nasal CPAP may reduce intubation and chronic lung disease (CLD).
Purpose of the Study:
- To evaluate prophylactic nasal CPAP in very preterm infants.
- To determine if early CPAP reduces intermittent positive pressure ventilation (IPPV) and CLD without adverse effects.
Main Methods:
- Systematic review and meta-analysis of randomized controlled trials.
- Included infants < 32 weeks gestation or < 1500g birth weight.
- Compared prophylactic nasal CPAP with standard care.
Main Results:
- No statistically significant differences in outcomes between groups.
- Trends towards increased BPD, death, and IVH in the CPAP group in one trial.
- Trends towards increased severe IVH in the CPAP group in another trial.
Conclusions:
- Insufficient evidence to confirm the effectiveness of prophylactic nasal CPAP.
- No demonstrated benefit in reducing IPPV use.
- Potential for increased adverse outcomes warrants further investigation.
Background:
Cohort studies (Avery 1987; Jonsson 1997) have suggested that early post-natal nasal continuous positive airways pressure (CPAP) may be beneficial in reducing the need for intubation and intermittent positive pressure ventilation, and in preventing chronic lung disease in preterm or low birth weight infants.
Objectives:
To determine if prophylactic nasal CPAP commenced soon after birth regardless of respiratory status in the very preterm or very low birth weight infant reduces the use of IPPV and the incidence of chronic lung disease (CLD) without adverse effects.
Search Strategy:
The search was updated in April 2005. The standard search strategy of the Neonatal Review Group was used. This included searches of the Oxford Database of Perinatal Trials, Cochrane Library Issue 1 2005, MEDLINE 1966-April 2005, previous reviews including cross references, abstracts, conferences, symposia, proceedings, expert informants, journal hand searching mainly in the English language.
Selection Criteria:
All trials using random or quasi-random patient allocation of very preterm infants < 32 weeks gestation and / or < 1500 gms at birth were eligible. Comparison had to be between prophylactic nasal CPAP commencing soon after birth regardless of the respiratory status of the infant compared with "standard" methods of treatment where CPAP or IPPV is used for a defined respiratory condition.
Data Collection And Analysis:
Standard methods of the Cochrane Collaboration and its Neonatal Review Group, including independent assessment of trial quality and extraction of data by each author, were used. Data were analysed using relative risk (RR). Meta-analysis was performed using a fixed effects model.
Main Results:
There are no statistically significant differences in any of the outcomes studied in either of the eligible trials (Han 1987; Sandri 2004) reporting on 82 and 230 infants respectively. In Han 1987 there are trends towards increases in the incidence of BPD at 28 days [RR 2.27 (0.77, 6.65)], death [RR 3.63 (0.42, 31.08)] and any IVH [RR 2.18 (0.84, 5.62)] in the CPAP group. In Sandri 2004 there is a trend towards an increase in IVH grade 3 or 4 [RR 3.0 (0.96, 28.42)] in the CPAP group. No outcome was significantly different in any of the meta-analyses.
Authors' Conclusions:
There is currently insufficient information to evaluate the effectiveness of prophylactic nasal CPAP in very preterm infants. Neither of the included studies reviewed showed evidence of benefit in reducing the use of IPPV. The tendency for some adverse outcomes to be increased is of concern and further multicentre randomized controlled trials are needed to clarify this.
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