Browsing by Author "Horn, Alan R"

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    The influence of birth site on short-term outcomes of encephalopathic newborn infants treated with therapeutic hypothermia at Groote Schuur Hospital, Cape Town, South Africa
    (2015) Nakibuuka, Victoria; Horn, Alan R; Rhoda, Natasha R
    Background: International consensus guidelines recommend that term or near-term newborns with moderate or severe hypoxic ischaemic encephalopathy (HIE) should be treated with induced hypothermia within 6 hours of birth, but many of the affected babies are born outside treatment centers. There are conflicting data describing the influence of birth site on outcome after HIE - and no published data from South Africa. Objective: To compare the frequency of abnormal outcome (mortality or abnormal aEEG) before discharge between inborn and outborn infants treated with hypothermia Methods: This was a retrospective analysis of data extracted from a prospectively collated registry of babies with moderate or severe HIE, treated with hypothermia in a tertiary hospital in South Africa, between 1 January 2011 and 31 December 2012. Results: A total of 57 babies were treated with hypothermia of which 23 (40%) were inborn and 34 (60%) outborn. Cooling was initiated earlier among the inborn babies (age 2.3 hours vs. 4.3 hours, p=0.002). Pregnancy complications and abnormal intrapartum fetal heart rates occurred more frequently in inborn infants (65.2 % vs. 24.2 %, p=0.0001 and 47.8% vs. 20.6%, p =0.03 respectively). More outborn babies died or had an abnormal aEEG at 48 hours (32 % vs. 22 %, p=0.556) and fewer outborn babies achieved normal feeding at discharge (22% vs. 38%, p = 0.189), but these differences were not statistically significant. Conclusion: The majority of infants treated with induced hypothermia in an urban/peri-urban setting in South Africa were not born in a cooling centre. There were significant delays in initiating cooling among the outborn babies. Short-term morbidity and mortality were not significantly different in outborn babies but interpretation is limited by the small sample size.
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    Rapid versus slow rate advancement of feeds for enterally fed extremely low birth weight infants < 1000g: randomised controlled trial
    (2014) Raban, Moegammad Shukri; Harrison, Michael C; Horn, Alan R; Modi, Neena
    Background The timeous achievement of full enteral nutrition in a preterm infant is a critical prerequisite for optimal growth, neurodevelopment and long-term wellbeing. However, the optimal enteral feeding regimen for preterm infants has not been established, and wide variations occur in practice. The debate on the most appropriate feeding strategy is nuanced by studies suggesting that early introduction of enteral feeds and the rapid advancement of enteral feeds may increase the risk of feeding intolerance and may be involved in the pathogenesis of necrotising enterocolitis (NEC). Objective 1. To review randomised controlled trials (RCT); examining the effect that the rate of advancement of enteral feeds has on the incidence of; NEC, mortality, growth, health care utilisation and other morbidities in very low birth weight (VLBW) and extremely low birth weight (ELBW) infants. 2. To establish the safety and efficacy of commencing enteral breast milk feeds at 24 ml/kg/day on the day of birth and advancing enteral breast milk feeds at 36 ml/kg/day, in infants weighing ≤ 1000 g.
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    The use of inhaled nitric oxide to treat persistent pulmonary hypertension of the newborn in a tertiary public hospital in South Africa from 2010-2014: morbidity, mortality and cost
    (2018) McAlpine, Alastair; Horn, Alan R; Tooke, Lloyd
    Background and rationale: Inhaled nitric oxide (iNO) is recommended for the treatment of severe persistent pulmonary hypertension of the newborn (PPHN) because it reduces the need for extracorporeal membrane oxygenation (ECMO). There is insufficient evidence that iNO reduces mortality in the absence of ECMO. Although neonates in some South African public hospitals have access to iNO, ECMO is not available. Oral sildenafil can be effective in settings where iNO is not available, but its effect on outcome and cost of treatment in this setting have not been described. The literature review in the first part of this thesis describes five studies reporting short-term outcomes of PPHN in the absence of ECMO. No studies from South Africa were identified. Only two studies described outcomes after iNO – the coadministration of Sildenafil with iNO was only reported in one small study. There were insufficient published data to guide management in settings where ECMO is not available. Aim: To describe a cohort of term and near term neonates with PPHN who were treated with iNO, with or without sildenafil, in a tertiary neonatal unit in South Africa Objectives: (i) to describe the characteristics at birth, the clinical course, and shortterm outcomes; (ii) to determine if any variables were associated with mortality; (iii) to describe the relationship between the use of sildenafil and cost of care, represented by the duration of intubation and iNO use; and (iv) to describe the frequency of sildenafil prescription. Methods. A retrospective review was carried out on folders of neonates with PPHN who were treated with iNO in Groote Schuur Hospital, Cape Town, South Africa, between January 2010 and December 2014. Results. Forty neonates were included – most were full term (85%). Meconium aspiration syndrome (MAS) was the commonest cause of PPHN (50%), followed by intrapartum hypoxia (20%), sepsis (17.5%), pulmonary hypoplasia (7.5%) and idiopathic (5%). Fourteen neonates (35%) died. Pulmonary hypoplasia and pneumothorax were associated with mortality (p=0.037 and p=0.004 respectively). An FiO2 of 1.0 and an iNO dose of ≥ 20 ppm at 24 and 48 hours respectively, both predicted death (specificity 89% vs. 100%, sensitivity 67% vs. 43% and p=0.003 vs. p=0.007 respectively). Sildenafil was prescribed more often after 2011 (83% vs. 65%) and was associated with increased survival (p=0.018) – early administration was associated with a shorter time to extubation (p=0.012) and a shorter course of iNO (p=0.044). Conclusion. The treatment of PPHN with iNO in the absence of ECMO was associated with high mortality, particularly in neonates with congenital lung abnormalities. The FiO2 and iNO requirements at 24 and 48 hours respectively could be used to identify neonates who are unlikely to benefit from continued treatment. Sildenafil was prescribed with increasing frequency during the study. The combination of iNO with sildenafil was associated with more cost-effective care and improved short term outcomes. These findings provide a potential basis for costsaving measures and resource allocation.