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      Improving survival of preterm babies in low- to middle-income countries - what can we do?

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      South African Journal of Child Health
      Health & Medical Publishing Group

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          Abstract

          Surviving prematurity poses the greatest challenge in neonatal care in low- to middle-income countries (LMICs). South Africa has not made much progress in improving the survival of preterm babies. Neonatal survival of preterm infants has become a national priority since the serious failure to reach the Millennium Development Goal targets in 2015. High rates of prevention are particularly relevant in LMICs, where the neonatal mortality rate is at its highest owing to a lack of simple and effective measures. Preventing prematurity and related complications begins with a healthy pregnancy. Antenatal care and maternal corticosteroids are antenatal interventions that could improve the survival of preterm babies. Postnatal interventions include: the management of neonatal sepsis, meningitis and pneumonia; prevention of hypothermia after delivery, for example, the plastic bag/wrap and cap, which has been extensively researched and is found to be an effective, low-cost method for reducing hypothermia in preterm infants; the use of continuous positive airway pressure (CPAP), including the low-cost CPAP device, which is a cost-effective strategy for providing respiratory support for premature neonates with respiratory distress syndrome; exogenous surfactant; early feeding with breastmilk; and kangaroo mother care. The use of cost-effective, evidence-based interventions can be implemented in LMICs to reduce neonatal mortality.

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          Early versus delayed selective surfactant treatment for neonatal respiratory distress syndrome.

          Clinical trials have confirmed that surfactant therapy is effective in improving the immediate need for respiratory support and the clinical outcome of premature newborns. Trials have studied a wide variety of surfactant preparations used either to prevent (prophylactic or delivery room administration) or treat (selective or rescue administration) respiratory distress syndrome (RDS). Using either treatment strategy, significant reductions in the incidence of pneumothorax, as well as significant improvement in survival, have been noted. It is unclear whether there are any advantages to treating infants with respiratory insufficiency earlier in the course of RDS. To compare the effects of early versus delayed selective surfactant therapy for newborns intubated for respiratory distress within the first two hours of life. Planned subgroup analyses included separate comparisons for studies utilizing natural surfactant extract and synthetic surfactant. We searched the Oxford Database of Perinatal Trials, MEDLINE (MeSH terms: pulmonary surfactant; text word: early; limits: age, newborn: publication type, clinical trial), PubMed, abstracts, conference and symposia proceedings, expert informants, and journal handsearching in the English language. For the updated search in April 2012 we searched the Cochrane Central Register of Controlled Trials (CENTRAL, The Cochrane Library, 2012, Issue 1) and PubMed (January 1997 to April 2012). Randomized and quasi-randomized controlled clinical trials comparing early selective surfactant administration (surfactant administration via the endotracheal tube in infants intubated for respiratory distress, not specifically for surfactant dosage) within the first two hours of life versus delayed selective surfactant administration to infants with established RDS were considered for review. Data regarding clinical outcomes were excerpted from the reports of the clinical trials by the review authors. Subgroup analyses were performed based on type of surfactant preparation, gestational age, and exposure to prenatal steroids. Data analysis was performed in accordance with the standards of the Cochrane Neonatal Review Group. Six randomized controlled trials met selection criteria. Two of the trials utilized synthetic surfactant (Exosurf Neonatal) and four utilized animal-derived surfactant preparations.The meta-analyses demonstrate significant reductions in the risk of neonatal mortality (typical risk ratio (RR) 0.84; 95% confidence interval (CI) 0.74 to 0.95; typical risk difference (RD) -0.04; 95% CI -0.06 to -0.01; 6 studies; 3577 infants), chronic lung disease (typical RR 0.69; 95% CI 0.55 to 0.86; typical RD -0.04; 95% CI -0.06 to -0.01; 3 studies; 3041 infants), and chronic lung disease or death at 36 weeks (typical RR 0.83; 95% CI 0.75 to 0.91; typical RD -0.06; 95% CI -0.09 to -0.03; 3 studies; 3050 infants) associated with early treatment of intubated infants with RDS.Intubated infants randomized to early selective surfactant administration also demonstrated a decreased risk of acute lung injury including a decreased risk of pneumothorax (typical RR 0.69; 95% CI 0.59 to 0.82; typical RD -0.05; 95% CI -0.08 to -0.03; 5 studies; 3545 infants), pulmonary interstitial emphysema (typical RR 0.60; 95% CI 0.41 to 0.89; typical RD -0.06; 95% CI -0.10 to -0.02; 3 studies; 780 infants), and overall air leak syndromes (typical RR 0.61; 95% CI 0.48 to 0.78; typical RD -0.18; 95% CI -0.26 to -0.09; 2 studies; 463 infants).A trend toward risk reduction for bronchopulmonary dysplasia (BPD) or death at 28 days was also evident (typical RR 0.94; 95% CI 0.88 to 1.00; typical RD -0.04; 95% CI -0.07 to -0.00; 3 studies; 3039 infants). No differences in other complications of RDS or prematurity were noted.Only two studies reported on infants under 30 weeks' gestation. Decreased risk of neonatal mortality and chronic lung disease or death at 36 weeks' postmenstrual age was noted. Early selective surfactant administration given to infants with RDS requiring assisted ventilation leads to a decreased risk of acute pulmonary injury (decreased risk of pneumothorax and pulmonary interstitial emphysema) and a decreased risk of neonatal mortality and chronic lung disease compared to delaying treatment of such infants until they develop worsening RDS.
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            Prophylactic nasal continuous positive airway pressure for preventing morbidity and mortality in very preterm infants.

            Cohort studies have suggested that nasal continuous positive airways pressure (CPAP) starting in the immediate postnatal period before the onset of respiratory disease (prophylactic CPAP) may be beneficial in reducing the need for intubation and intermittent positive pressure ventilation (IPPV) and in preventing bronchopulmonary dysplasia (BPD) in preterm or low birth weight infants.
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              Interventions to Improve Neonatal Health and Later Survival: An Overview of Systematic Reviews

              Background Evidence-based interventions and strategies are needed to improve child survival in countries with a high burden of neonatal and child mortality. An overview of systematic reviews can focus implementation on the most effective ways to increase child survival. Methods In this overview we included published Cochrane and other systematic reviews of experimental and observational studies on antenatal, childbirth, postnatal and child health interventions aiming to prevent perinatal/neonatal and child mortality using the WHO list of essential interventions. We assessed the methodological quality of the reviews using the AMSTAR criteria and assessed the quality of the outcomes using the GRADE approach. Based on the findings from GRADE criteria, interventions were summarized as effective, promising or ineffective. Findings The overview identified 148 Cochrane and other systematic reviews on 61 reproductive, maternal, newborn and child health interventions. Of these, only 57 reviews reported mortality outcomes. Using the GRADE approach, antenatal corticosteroids for preventing neonatal respiratory distress syndrome in preterm infants; early initiation of breastfeeding; hygienic cord care; kangaroo care for preterm infants; provision and promotion of use of insecticide treated bed nets (ITNs) for children; and vitamin A supplementation for infants from six months of age, were identified as clearly effective interventions for reducing neonatal, infant or child mortality. Antenatal care, tetanus immunization in pregnancy, prophylactic antimalarials during pregnancy, induction of labour for prolonged pregnancy, case management of neonatal sepsis, meningitis and pneumonia, prophylactic and therapeutic use of surfactant, continuous positive airway pressure for neonatal resuscitation, case management of childhood malaria and pneumonia, vitamin A as part of treatment for measles associated pneumonia for children above 6 months, and home visits across the continuum of care, were identified as promising interventions for reducing neonatal, infant, child or perinatal mortality. Interpretation Comprehensive adoption of the above six effective and 11 promising interventions can improve neonatal and child survival around the world. Choice of intervention and degree of implementation currently depends on resources available and policies in individual countries and geographical settings. Funding This review was part of doctoral thesis which was funded by University of Adelaide, Australia.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                sajch
                South African Journal of Child Health
                S. Afr. j. child health
                Health & Medical Publishing Group (Cape Town, Western Cape Province, South Africa )
                1994-3032
                1999-7671
                September 2018
                : 12
                : 3
                : 117-120
                Affiliations
                [03] orgnameUniversity of Pretoria orgdiv1School of Medicine orgdiv2Department of Paediatrics and Child Health South Africa
                [02] orgnameUniversity of Pretoria orgdiv1School of Medicine orgdiv2Department of Paediatrics and Child Health South Africa
                [01] orgnameUniversity of Pretoria orgdiv1School of Medicine orgdiv2Department of Paediatrics and Child Health South Africa
                Article
                S1999-76712018000300008
                10.7196/sajch.2018.v12i3.1503
                e185fbfa-9ec9-4fc1-846e-8a3a8588388a

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

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                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 31, Pages: 4
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                SciELO South Africa


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