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Wei X, Franke N, Alsweiler JM, Brown GTL, Gamble GD, McNeill A, Rogers J, Thompson B, Turuwhenua J, Wouldes TA, Harding JE, McKinlay CJD. Neonatal Hypoglycemia and Neurocognitive Function at School Age: A Prospective Cohort Study. J Pediatr 2024; 272:114119. [PMID: 38815750 DOI: 10.1016/j.jpeds.2024.114119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 04/22/2024] [Accepted: 05/22/2024] [Indexed: 06/01/2024]
Abstract
OBJECTIVE To determine the relationship between transient neonatal hypoglycemia in at-risk infants and neurocognitive function at 6-7 years of corrected age. STUDY DESIGN The pre-hPOD Study involved children born with at least 1 risk factor for neonatal hypoglycemia. Hypoglycemia was defined as ≥1 consecutive blood glucose concentrations <47 mg/dl (2.6 mmol/L), severe as <36 mg/dl (2.0 mmol/L), mild as 36 to <47 mg/dL (2.0 to <2.6 mmol/L), brief as 1-2 episodes, and recurrent as ≥3 episodes. At 6-7 years children were assessed for cognitive and motor function (NIH-Toolbox), learning, visual perception and behavior. The primary outcome was neurocognitive impairment, defined as >1 SD below the normative mean in ≥1 Toolbox tests. The 8 secondary outcomes covered children's cognitive, motor, language, emotional-behavioral, and visual perceptual development. Primary and secondary outcomes were compared between children who did and did not experience neonatal hypoglycemia, adjusting for potential confounding by gestation, birthweight, sex and receipt of prophylactic dextrose gel (pre-hPOD intervention). Secondary analysis included assessment by severity and frequency of hypoglycemia. RESULTS Of 392 eligible children, 315 (80%) were assessed at school age (primary outcome, n = 308); 47% experienced hypoglycemia. Neurocognitive impairment was similar between exposure groups (hypoglycemia 51% vs 50% no hypoglycemia; aRD -4%, 95% CI -15%, 7%). Children with severe or recurrent hypoglycemia had worse visual motion perception and increased risk of emotional-behavioral difficulty. CONCLUSION Exposure to neonatal hypoglycemia was not associated with risk of neurocognitive impairment at school-age in at-risk infants, but severe and recurrent episodes may have adverse impacts. TRIAL REGISTRATION Hypoglycemia Prevention in Newborns with Oral Dextrose: the Dosage Trial (pre-hPOD Study): ACTRN12613000322730.
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Sadler LC, Thompson JMD, Alsweiler JM, McKinlay CJD, Cronin R, Browne E, Baillie-Bellew T, Harvey AD, Hill MG. Maternal and neonatal morbidity associated with Fetal Pillow® use at full dilatation caesarean: A retrospective cohort. BJOG 2024; 131:1240-1248. [PMID: 38287196 DOI: 10.1111/1471-0528.17772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 01/05/2024] [Accepted: 01/10/2024] [Indexed: 01/31/2024]
Abstract
OBJECTIVE To investigate associations of the Fetal Pillow® with maternal and neonatal morbidity. DESIGN Retrospective cohort. SETTING Two tertiary maternity units, New Zealand. POPULATION OR SAMPLE Full dilatation singleton, term, cephalic caesarean section, with three comparisons: at Unit A (1) before versus after introduction of the Fetal Pillow® (1 Jaunary 2016-31 October 2021); (2) with versus without the Fetal Pillow® after introduction (27 July 2017-31 October 2021); and (3) between Unit A and Unit B during the same time period (1 January 2019-31 October 2021). The Fetal Pillow® is unavailable at Unit B. METHODS Cases were ascertained and clinical data were extracted from electronic clinical databases and records. Outcome data were adjusted and presented as adjusted odds ratios (aOR) with 95% CI. MAIN OUTCOME MEASURES Primary outcome "any" uterine incision extension; secondary outcomes included major extension (into adjacent structures), and a composite neonatal outcome. RESULTS In all, 1703 caesareans were included; 375 with the device and 1328 without. Uterine incision extension rates were: at Unit A before versus after introduction: 26.8% versus 24.8% (aOR 0.88, 95% CI 0.65-1.19); at Unit A with the Fetal Pillow® versus without: 26.1% versus 23.8% (aOR 1.14, 95% CI 0.83-1.57); and at Unit A versus Unit B: 24.2% versus 29.2% (aOR 0.73, 95% CI 0.54-0.99). No differences were found in major extensions, or neonatal composite outcome. CONCLUSIONS Despite the relatively large size of this study, it could not rule out either a positive or a negative association between use of the Fetal Pillow® and uterine extensions, major uterine incision extensions, and neonatal morbidity. Randomised controlled trial evidence is required to assess efficacy.
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Wei X, Franke N, Alsweiler JM, Brown GTL, Gamble GD, McNeill A, Rogers J, Thompson B, Turuwhenua J, Wouldes TA, Harding JE, McKinlay CJD. Dextrose gel prophylaxis for neonatal hypoglycaemia and neurocognitive function at early school age: a randomised dosage trial. Arch Dis Child Fetal Neonatal Ed 2024; 109:421-427. [PMID: 38307710 PMCID: PMC11186727 DOI: 10.1136/archdischild-2023-326452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 12/07/2023] [Indexed: 02/04/2024]
Abstract
OBJECTIVE To investigate the effect of different doses of prophylactic dextrose gel on neurocognitive function and health at 6-7 years. DESIGN Early school-age follow-up of the pre-hPOD (hypoglycaemia Prevention with Oral Dextrose) study. SETTING Schools and communities. PATIENTS Children born at ≥35 weeks with ≥1 risk factor for neonatal hypoglycaemia: maternal diabetes, small or large for gestational age, or late preterm. INTERVENTIONS Four interventions commencing at 1 hour of age: dextrose gel (40%) 200 mg/kg; 400 mg/kg; 200 mg/kg and 200 mg/kg repeated before three feeds (800 mg/kg); 400 mg/kg and 200 mg/kg before three feeds (1000 mg/kg); compared with equivolume placebo (combined for analysis). MAIN OUTCOMES MEASURES Toolbox cognitive and motor batteries, as well as tests of motion perception, numeracy and cardiometabolic health, were used. The primary outcome was neurocognitive impairment, defined as a standard score of more than 1 SD below the age-corrected mean on one or more Toolbox tests. FINDINGS Of 392 eligible children, 309 were assessed for the primary outcome. There were no significant differences in the rate of neurocognitive impairment between those randomised to placebo (56%) and dextrose gel (200 mg/kg 46%: adjusted risk difference (aRD)=-14%, 95% CI -35%, 7%; 400 mg/kg 48%: aRD=-7%, 95% CI -27%, 12%; 800 mg/kg 45%: aRD=-14%, 95% CI -36%, 9%; 1000 mg/kg 50%: aRD=-8%, 95% CI -29%, 13%). Children exposed to any dose of dextrose gel (combined), compared with placebo, had a lower risk of motor impairment (3% vs 14%, aRD=-11%, 95% CI -19%, -3%) and higher mean (SD) cognitive scores (106.0 (15.3) vs 101.1 (15.7), adjusted mean difference=5.4, 95% CI 1.8, 8.9). CONCLUSIONS Prophylactic neonatal dextrose gel did not alter neurocognitive impairment at early school age but may have motor and cognitive benefits. Further school-age follow-up studies are needed.
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Laing D, Walsh EPG, Alsweiler JM, Hanning SM, Meyer MP, Ardern J, Cutfield WS, Rogers J, Gamble GD, Chase JG, Harding JE, McKinlay CJD. Diazoxide for Severe or Recurrent Neonatal Hypoglycemia: A Randomized Clinical Trial. JAMA Netw Open 2024; 7:e2415764. [PMID: 38869900 PMCID: PMC11177163 DOI: 10.1001/jamanetworkopen.2024.15764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Accepted: 04/09/2024] [Indexed: 06/14/2024] Open
Abstract
Importance Neonatal hypoglycemia is an important preventable cause of neurodevelopmental impairment, but there is a paucity of evidence to guide treatment. Objective To evaluate whether early, low-dose oral diazoxide for severe or recurrent neonatal hypoglycemia reduces time to resolution of hypoglycemia. Design, Setting, and Participants This 2-arm, placebo-controlled randomized clinical trial was conducted from May 2020 to February 2023 in tertiary neonatal units at 2 New Zealand hospitals. Participants were neonates born at 35 or more weeks' gestation and less than 1 week of age with severe hypoglycemia (blood glucose concentration <22 mg/dL or <36 mg/dL despite 2 doses of dextrose gel) or recurrent hypoglycemia (≥3 episodes of a blood glucose concentration <47 mg/dL within 48 hours). Interventions Newborns were randomized 1:1 to receive diazoxide suspension (loading dose, 5 mg/kg; maintenance, 1.5 mg/kg every 12 hours) or placebo, titrated per protocol. Main Outcome and Measures The primary outcome was time to resolution of hypoglycemia, defined as enteral bolus feeding without intravenous fluids and normoglycemia (blood glucose concentration of 47-98 mg/dL) for at least 24 hours, compared between groups using adjusted Cox proportional hazards regression. Hazard ratios adjusted for stratification variables and gestation length are reported. Prespecified secondary outcomes, including number of blood glucose tests and episodes of hypoglycemia, duration of hypoglycemia, and time to enteral bolus feeding and weaning from intravenous fluids, were compared by generalized linear models. Newborns were followed up for at least 2 weeks. Results Of 154 newborns screened, 75 were randomized and 74 with evaluable data were included in the analysis (mean [SD] gestational age for the full cohort, 37.6 [1.6] weeks), 36 in the diazoxide group and 38 in the placebo group. Baseline characteristics were similar: in the diazoxide group, mean (SD) gestational age was 37.9 (1.6) weeks and 26 (72%) were male; in the placebo group, mean (SD) gestational age was 37.4 (1.5) weeks and 27 (71%) were male. There was no significant difference in time to resolution of hypoglycemia (adjusted hazard ratio [AHR], 1.39; 95% CI, 0.84-2.23), possibly due to increased episodes of elevated blood glucose concentration and longer time to normoglycemia in the diazoxide group. Resolution of hypoglycemia, when redefined post hoc as enteral bolus feeding without intravenous fluids for at least 24 hours with no further hypoglycemia, was reached by more newborns in the diazoxide group (AHR, 2.60; 95% CI, 1.53-4.46). Newborns in the diazoxide group had fewer blood glucose tests (adjusted count ratio [ACR], 0.63; 95% CI, 0.56-0.71) and episodes of hypoglycemia (ACR, 0.32; 95% CI, 0.17-0.63), reduced duration of hypoglycemia (adjusted ratio of geometric means [ARGM], 0.18; 95% CI, 0.06-0.53), and reduced time to enteral bolus feeding (ARGM, 0.74; 95% CI, 0.58-0.95) and weaning from intravenous fluids (ARGM, 0.72; 95% CI, 0.60-0.87). Only 2 newborns (6%) treated with diazoxide had hypoglycemia after the loading dose compared with 20 (53%) with placebo. Conclusions and Relevance In this randomized clinical trial, early treatment of severe or recurrent neonatal hypoglycemia with low-dose oral diazoxide did not reduce time to resolution of hypoglycemia but reduced time to enteral bolus feeding and weaning from intravenous fluids, duration of hypoglycemia, and frequency of blood glucose testing compared with placebo. Trial Registration ANZCTR.org.au Identifier: ACTRN12620000129987.
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Oliphant EA, Hanning SM, McKinlay CJD, Alsweiler JM. Caffeine for apnea and prevention of neurodevelopmental impairment in preterm infants: systematic review and meta-analysis. J Perinatol 2024; 44:785-801. [PMID: 38553606 PMCID: PMC11161406 DOI: 10.1038/s41372-024-01939-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 03/07/2024] [Accepted: 03/12/2024] [Indexed: 06/09/2024]
Abstract
This systematic review and meta-analysis evaluated the evidence for dose and effectiveness of caffeine in preterm infants. MEDLINE, EMBASE, CINHAL Plus, CENTRAL, and trial databases were searched to July 2022 for trials randomizing preterm infants to caffeine vs. placebo/no treatment, or low (≤10 mg·kg-1) vs. high dose (>10 mg·kg-1 caffeine citrate equivalent). Two researchers extracted data and assessed risk of bias using RoB; GRADE evaluation was completed by all authors. Meta-analysis of 15 studies (3530 infants) was performed in REVMAN across four epochs: neonatal/infant (birth-1 year), early childhood (1-5 years), middle childhood (6-11 years) and adolescence (12-19 years). Caffeine reduced apnea (RR 0.59; 95%CI 0.46,0.75; very low certainty) and bronchopulmonary dysplasia (0.77; 0.69,0.86; moderate certainty), with higher doses more effective. Caffeine had no effect on neurocognitive impairment in early childhood but possible benefit on motor function in middle childhood (0.72; 0.57,0.91; moderate certainty). The optimal dose remains unknown; further long-term studies, are needed.
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Alexander T, Asadi S, Meyer M, Harding JE, Jiang Y, Alsweiler JM, Muelbert M, Bloomfield FH. Nutritional Support for Moderate-to-Late-Preterm Infants - A Randomized Trial. N Engl J Med 2024; 390:1493-1504. [PMID: 38657245 DOI: 10.1056/nejmoa2313942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
BACKGROUND Most moderate-to-late-preterm infants need nutritional support until they are feeding exclusively on their mother's breast milk. Evidence to guide nutrition strategies for these infants is lacking. METHODS We conducted a multicenter, factorial, randomized trial involving infants born at 32 weeks 0 days' to 35 weeks 6 days' gestation who had intravenous access and whose mothers intended to breast-feed. Each infant was assigned to three interventions or their comparators: intravenous amino acid solution (parenteral nutrition) or dextrose solution until full feeding with milk was established; milk supplement given when maternal milk was insufficient or mother's breast milk exclusively with no supplementation; and taste and smell exposure before gastric-tube feeding or no taste and smell exposure. The primary outcome for the parenteral nutrition and the milk supplement interventions was the body-fat percentage at 4 months of corrected gestational age, and the primary outcome for the taste and smell intervention was the time to full enteral feeding (150 ml per kilogram of body weight per day or exclusive breast-feeding). RESULTS A total of 532 infants (291 boys [55%]) were included in the trial. The mean (±SD) body-fat percentage at 4 months was similar among the infants who received parenteral nutrition and those who received dextrose solution (26.0±5.4% vs. 26.2±5.2%; adjusted mean difference, -0.20; 95% confidence interval [CI], -1.32 to 0.92; P = 0.72) and among the infants who received milk supplement and those who received mother's breast milk exclusively (26.3±5.3% vs. 25.8±5.4%; adjusted mean difference, 0.65; 95% CI, -0.45 to 1.74; P = 0.25). The time to full enteral feeding was similar among the infants who were exposed to taste and smell and those who were not (5.8±1.5 vs. 5.7±1.9 days; P = 0.59). Secondary outcomes were similar across interventions. Serious adverse events occurred in one infant. CONCLUSIONS This trial of routine nutrition interventions to support moderate-to-late-preterm infants until full nutrition with mother's breast milk was possible did not show any effects on the time to full enteral feeding or on body composition at 4 months of corrected gestational age. (Funded by the Health Research Council of New Zealand and others; DIAMOND Australian New Zealand Clinical Trials Registry number, ACTRN12616001199404.).
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Harding JE, Alsweiler JM, Edwards TE, McKinlay CJD. Neonatal hypoglycaemia. BMJ MEDICINE 2024; 3:e000544. [PMID: 38618170 PMCID: PMC11015200 DOI: 10.1136/bmjmed-2023-000544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 03/04/2024] [Indexed: 04/16/2024]
Abstract
Low blood concentrations of glucose (hypoglycaemia) soon after birth are common because of the delayed metabolic transition from maternal to endogenous neonatal sources of glucose. Because glucose is the main energy source for the brain, severe hypoglycaemia can cause neuroglycopenia (inadequate supply of glucose to the brain) and, if severe, permanent brain injury. Routine screening of infants at risk and treatment when hypoglycaemia is detected are therefore widely recommended. Robust evidence to support most aspects of management is lacking, however, including the appropriate threshold for diagnosis and optimal monitoring. Treatment is usually initially more feeding, with buccal dextrose gel, followed by intravenous dextrose. In infants at risk, developmental outcomes after mild hypoglycaemia seem to be worse than in those who do not develop hypoglycaemia, but the reasons for these observations are uncertain. Here, the current understanding of the pathophysiology of neonatal hypoglycaemia and recent evidence regarding its diagnosis, management, and outcomes are reviewed. Recommendations are made for further research priorities.
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Kulmaganbetov M, Leung M, Alsweiler JM, Black J, Bloomfield FH, Gamble GD, Harding JE, Jiang Y, Poppe T, Tottman AC, Wouldes TA, Thompson B. Associations between neonatal nutrition and visual outcomes in 7-year-old children born very preterm. Ophthalmic Physiol Opt 2024; 44:347-355. [PMID: 38069619 DOI: 10.1111/opo.13260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 11/10/2023] [Accepted: 11/25/2023] [Indexed: 02/08/2024]
Abstract
PURPOSE There is uncertainty about the effect of increased neonatal protein intake on neurodevelopmental outcomes following preterm birth. The aim of this study was to assess the effect of a change in neonatal nutrition protocol at a major tertiary neonatal intensive care unit intended to increase protein intake on ophthalmic and visual development in school-age children born very preterm. METHODS The study cohort comprised children (n = 128) with birthweight <1500 g or gestational age < 30 weeks born at Auckland City Hospital before (OldPro group, n = 55) and after (NewPro group, n = 73) a reformulation of parenteral nutrition that resulted in increased total protein intake during the first postnatal week and decreased carbohydrate, total parenteral fluid and sodium intake. Clinical and psychophysical vision assessments were completed at 7 years' corrected age, including visual acuity, global motion perception (a measure of dorsal stream function), stereoacuity, ocular motility and ocular health. Composite measures of favourable overall visual, binocular and functional visual outcomes along with individual vision measures were compared between the groups using logistic and linear regression models. RESULTS Favourable overall visual outcome did not differ between the two groups. However, global motion perception was better in the NewPro group (p = 0.04), whereas the OldPro group were more likely to have favourable binocular visual outcomes (60% vs. 36%, p = 0.02) and passing stereoacuity (p = 0.02). CONCLUSIONS These results indicate subtle but complex associations between early neonatal nutrition after very preterm birth and visual development at school age.
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Manerkar K, Crowther CA, Harding JE, Meyer MP, Conlon CA, Rush EC, Alsweiler JM, McCowan LME, Rowan JA, Edlin R, Amitrano F, McKinlay CJD. Impact of Gestational Diabetes Detection Thresholds on Infant Growth and Body Composition: A Prospective Cohort Study Within a Randomized Trial. Diabetes Care 2024; 47:56-65. [PMID: 37643291 DOI: 10.2337/dc23-0464] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 08/01/2023] [Indexed: 08/31/2023]
Abstract
OBJECTIVE Gestational diabetes mellitus (GDM) is associated with offspring metabolic disease, including childhood obesity, but causal mediators remain to be established. We assessed the impact of lower versus higher thresholds for detection and treatment of GDM on infant risk factors for obesity, including body composition, growth, nutrition, and appetite. RESEARCH DESIGN AND METHODS In this prospective cohort study within the Gestational Diabetes Mellitus Trial of Diagnostic Detection Thresholds (GEMS), pregnant women were randomly allocated to detection of GDM using the lower criteria of the International Association of Diabetes and Pregnancy Study Groups or higher New Zealand criteria (ACTRN12615000290594). Randomly selected control infants of women without GDM were compared with infants exposed to A) GDM by lower but not higher criteria, with usual treatment for diabetes in pregnancy; B) GDM by lower but not higher criteria, untreated; or C) GDM by higher criteria, treated. The primary outcome was whole-body fat mass at 5-6 months. RESULTS There were 760 infants enrolled, and 432 were assessed for the primary outcome. Fat mass was not significantly different between control infants (2.05 kg) and exposure groups: A) GDM by lower but not higher criteria, treated (1.96 kg), adjusted mean difference (aMD) -0.09 (95% CI -0.29, 0.10); B) GDM by lower but not higher criteria, untreated (1.94 kg), aMD -0.15 (95% CI -0.35, 0.06); and C) GDM detected and treated using higher thresholds (1.87 kg), aMD -0.17 (95% CI -0.37, 0.03). CONCLUSIONS GDM detected using lower but not higher criteria, was not associated with increased infant fat mass at 5-6 months, regardless of maternal treatment. GDM detected and treated using higher thresholds was also not associated with increased fat mass at 5-6 months.
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O'Brien M, Gilchrist C, Sadler L, Hegarty JE, Alsweiler JM. Infants Eligible for Neonatal Hypoglycemia Screening: A Systematic Review. JAMA Pediatr 2023; 177:1187-1196. [PMID: 37782488 PMCID: PMC10546298 DOI: 10.1001/jamapediatrics.2023.3957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 08/02/2023] [Indexed: 10/03/2023]
Abstract
Importance Neonatal hypoglycemia is common, occurring in up to 50% of infants at risk for hypoglycemia (infant of diabetic mother [IDM], small for gestational age [SGA], large for gestational age [LGA], and preterm) and is associated with long-term neurodevelopmental impairment. Guidelines recommend screening infants at risk of hypoglycemia. The proportion of infants who require screening for neonatal hypoglycemia is unknown. Objective To determine the proportion of infants eligible for neonatal hypoglycemia screening using criteria from the highest-scoring critically appraised clinical guideline. Design, Setting, and Participants This systematic review of the literature was conducted to identify clinical practice guidelines for neonatal hypoglycemia and took place at a tertiary maternity hospital in Auckland, New Zealand. Eligible guidelines were critically appraised using the Appraisal of Guidelines for Research and Evaluation II tool. Using screening criteria extracted from the highest-scoring guideline, the proportion of infants eligible for neonatal hypoglycemia screening was determined in a retrospective observational cohort study of infants born January 1, 2004, to December 31, 2018. Data were analyzed by logistic regression. Infant participants were included if gestational age was 35 weeks or more, birth weight was 2000 g or more, and they were not admitted to a neonatal intensive care unit less than 1 hour after birth. The data were analyzed from November 2022 through February 2023. A total of 101 372 infants met the inclusion criteria. Exposure Risk factors for neonatal hypoglycemia. Main Outcome Proportion of infants eligible for neonatal hypoglycemia screening. Results The study team screened 2366 abstracts and 18 guidelines met inclusion criteria for appraisal. There was variability in the assessed quality of guidelines and a lack of consensus between screening criteria. The highest-scoring guideline defined screening criteria as: IDM, preterm (less than 37 weeks' gestation), SGA (less than 10th percentile), birth weight of less than 2500 g or more than 4500 g, LGA (more than 90th percentile), or gestational age more than 42 weeks. A total of 101 372 infants met criteria for inclusion in the cohort study; median (IQR) gestational age was 39 (38-40) weeks and 51% were male. The overall proportion of infants eligible for screening was 26.3%. There was an increase in the proportion of eligible infants from 25.6% to 28.5% over 15 years, which was not statistically significant after adjustment for maternal age, body mass index, ethnicity, and multiple pregnancy (odds ratio, 0.99; 95% CI, 0.93-1.03; change in proportion per year). Conclusion A systematic review found that practice guidelines providing recommendations for clinical care of neonatal hypoglycemia were of variable quality with is a lack of consensus regarding definitions for infants at risk for hypoglycemia. In the cohort study, one-quarter of infants were eligible for hypoglycemia screening. Further research is required to identify which infants may benefit from neonatal hypoglycemia screening.
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Alsweiler JM, Crowther CA, Harding JE. Midwife or doctor leader to implement a national guideline in babies on postnatal wards (DesIGN): A cluster-randomised, controlled, trial. PLoS One 2023; 18:e0291784. [PMID: 37768901 PMCID: PMC10538667 DOI: 10.1371/journal.pone.0291784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 09/05/2023] [Indexed: 09/30/2023] Open
Abstract
The aim of this trial was to determine if midwives or doctor leaders are more effective at implementing a clinical practice guideline for oral dextrose gel to treat neonatal hypoglycaemia. This was a cluster-randomised, controlled, trial. New Zealand maternity hospitals were randomised to guideline implementation by a midwife or doctor implementation leader. The primary outcome was the change in the proportion of hypoglycaemic babies (blood glucose concentration <2.6 mmol/L in the first 48 hours after birth), treated with dextrose gel from before, to three months after, implementation. Twenty-one maternity hospitals that cared for babies at risk of hypoglycaemia consented to participate, of which 15 treated babies with hypoglycaemia at both time points (7 randomised to midwifery led, 8 randomised to doctor led implementation). The primary outcome included 463 hypoglycaemic babies (292 midwifery led, 171 doctor led implementation). There was no difference in the primary outcome between hospitals randomised to midwifery or doctor led implementation (proportion treated with gel, mean(SD); midwifery led: before 71 (38)%, 3 months after 87 (12)%; doctor led: before 63 (43)%, 3 months after 86 (16)%; adjusted mean change in proportion (95%CI); 19.3% (-4.5-43.1), p = 0.11). There was an increase in the proportion of eligible babies treated with oral dextrose gel from before to 3 months after implementation of the guideline (122/153 (80%) v 144/163 (88%), OR (95%CI); 3.42 (1.67-6.98), p<0.001). Implementation of a clinical practice guideline improved uptake of oral dextrose gel. There was no evidence of a difference between midwife and doctor implementation leaders for implementing this guideline for treatment of hypoglycaemic babies. The trial was prospectively registered on the ISRCTN registry on the 20/05/2015 (ISRCTN61154098).
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Purohit TJ, Laing D, McKinlay CJD, Alsweiler JM, Hanning SM. Development and clinical application of a stability-indicating chromatography technique for the quantification of diazoxide. Heliyon 2023; 9:e20101. [PMID: 37810084 PMCID: PMC10559840 DOI: 10.1016/j.heliyon.2023.e20101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 08/21/2023] [Accepted: 09/12/2023] [Indexed: 10/10/2023] Open
Abstract
Diazoxide is a potential candidate for the treatment of transitional hypoglycaemia in infants. A clinical trial is currently underway to investigate whether low-dose oral diazoxide is beneficial for severe or recurrent transitional neonatal hypoglycaemia (the NeoGluCO Study, registration ANZCTR12620000129987). The present study aimed to develop and validate the parameters for quantifying diazoxide from neonatal plasma samples, and to assess the stability of extemporaneously prepared diazoxide suspensions to support the NeoGluCO Study. To determine the plasma concentration of diazoxide, a protein precipitation mediated extraction protocol was developed, which demonstrated >94% diazoxide extraction recoveries from all samples. The method was linear over the range of 0.2-40 μg/mL (R2 > 0.9994) with a limit of quantification of 0.2 μg/mL. Accuracy of the method was within 97-106% with relative standard deviation < 6% for all samples. Diazoxide-plasma samples were stable for up to three months at -20 °C and up to 48 h when stored in the auto-sampler. Samples were stable for up to two freeze-thaw cycles, with further cycles compromising stability of diazoxide in plasma. The developed method was applied to determine chemical stability of the extemporaneously prepared diazoxide suspensions. These were stable at both 2-8 °C and 25 °C/60% RH, with 98% of diazoxide remaining after 35 days in both storage conditions. Diazoxide was successfully quantified from plasma collected from six neonates enrolled in the NeoGluCO Study, using the developed protocol. Overall, an efficient and reproducible extraction protocol was developed and validated for the estimation of diazoxide from human plasma.
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Oliphant EA, McKinlay CJ, McNamara D, Cavadino A, Alsweiler JM. Caffeine to prevent intermittent hypoxaemia in late preterm infants: randomised controlled dosage trial. Arch Dis Child Fetal Neonatal Ed 2023; 108:106-113. [PMID: 36038256 PMCID: PMC9985705 DOI: 10.1136/archdischild-2022-324010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 07/12/2022] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To establish the most effective and best tolerated dose of caffeine citrate for the prevention of intermittent hypoxaemia (IH) in late preterm infants. DESIGN Phase IIB, double-blind, five-arm, parallel, randomised controlled trial. SETTING Neonatal units and postnatal wards of two tertiary maternity hospitals in New Zealand. PARTICIPANTS Late preterm infants born at 34+0-36+6 weeks' gestation, recruited within 72 hours of birth. INTERVENTION Infants were randomly assigned to receive a loading dose (10, 20, 30 or 40 mg/kg) followed by 5, 10, 15 or 20 mg/kg/day equivolume enteral caffeine citrate or placebo daily until term corrected age. PRIMARY OUTCOME IH (events/hour with oxygen saturation concentration ≥10% below baseline for ≤2 min), 2 weeks postrandomisation. RESULTS 132 infants with mean (SD) birth weight 2561 (481) g and gestational age 35.7 (0.8) weeks were randomised (24-28 per group). Caffeine reduced the rate of IH at 2 weeks postrandomisation (geometric mean (GM): 4.6, 4.6, 2.0, 3.8 and 1.7 events/hour for placebo, 5, 10, 15 and 20 mg/kg/day, respectively), with differences statistically significant for 10 mg/kg/day (GM ratio (95% CI] 0.39 (0.20 to 0.76]; p=0.006) and 20 mg/kg/day (GM ratio (95% CI] 0.33 (0.17 to 0.68]; p=0.003) compared with placebo. The 20 mg/kg/day dose increased mean (SD) pulse oximetry oxygen saturation (SpO2) (97.2 (1.0) vs placebo 96.0 (0.8); p<0.001), and reduced median (IQR) percentage of time SpO2 <90% (0.5 (0.2-0.8) vs 1.1 (0.6-2.4); p<0.001) at 2 weeks, without significant adverse effects on growth velocity or sleeping. CONCLUSION Caffeine reduces IH in late preterm infants at 2 weeks of age, with 20 mg/kg/day being the most effective dose. TRIAL REGISTRATION NUMBER ACTRN12618001745235.
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Kremer LJ, Medlicott N, Sime MJ, Broadbent R, Edmonds L, Berry MJ, Austin NC, Alsweiler JM, Reith DM. Low dose or very low dose phenylephrine and cyclopentolate microdrops for retinopathy of prematurity eye examinations (The Little Eye Drop Study): a randomised controlled non-inferiority trial. Arch Dis Child Fetal Neonatal Ed 2023:archdischild-2022-324929. [PMID: 36593111 DOI: 10.1136/archdischild-2022-324929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 12/19/2022] [Indexed: 01/03/2023]
Abstract
OBJECTIVE To determine if very low dose (VLD, 0.5% phenylephrine, 0.1% cyclopentolate) mydriatic microdrop (approximately 7 μL) administration (up to three doses) is non-inferior to low dose (LD, 1% phenylephrine, 0.2% cyclopentolate) mydriatic microdrop administration for ophthalmologist-determined successful retinopathy of prematurity eye examination (ROPEE). DESIGN Multicentre, prospective, randomised controlled, non-inferiority clinical trial. SETTING Four neonatal intensive care units in Aotearoa, New Zealand from October 2019 to September 2021. PATIENTS Infants with a birth weight less than 1250 g or gestational age less than 30+6 weeks and who required a ROPEE. INTERVENTIONS The intervention: microdrop (approximately 7 μL) of VLD (0.5% phenylephrine and 0.1% cyclopentolate) to both eyes, or the comparison: microdrop of LD (1% phenylephrine and 0.2% cyclopentolate) to both eyes. Up to three doses could be administered. MAIN OUTCOME MEASURES The primary outcome measure was an ophthalmologist-determined successful ROPEE. RESULTS One hundred and fifty preterm infants (LD mean GA=27.4±1.8 weeks, mean birth weight=1011±290 g, VLD mean GA=27.5±1.9 weeks, mean birth weight=1049±281 g,) were randomised. Non-inferiority for successful ROPEE was demonstrated for the VLD group compared with the LD group (VLD successful ROPEE=100%, LD successful ROPEE=100%, 95% CI no continuity correction -0.05 to 0.05) and for Māori (95% CI no continuity correction -0.02 to 0.19). CONCLUSION VLD microdrops enable safe and effective screening for ROPEE in both Māori and non-Māori preterm infants. TRIAL REGISTRATION NUMBER ACTRN12619000795190.
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Edwards T, Alsweiler JM, Gamble GD, Griffith R, Lin L, McKinlay CJD, Rogers JA, Thompson B, Wouldes TA, Harding JE. Neurocognitive Outcomes at Age 2 Years After Neonatal Hypoglycemia in a Cohort of Participants From the hPOD Randomized Trial. JAMA Netw Open 2022; 5:e2235989. [PMID: 36219444 PMCID: PMC9554702 DOI: 10.1001/jamanetworkopen.2022.35989] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
IMPORTANCE Neonatal hypoglycemia is common, but its association with later neurodevelopment is uncertain. OBJECTIVE To examine associations between neonatal hypoglycemia and neurocognitive outcomes at corrected age 2 years. DESIGN, SETTING, AND PARTICIPANTS Exploratory cohort analysis of the Hypoglycaemia Prevention With Oral Dextrose (hPOD) randomized clinical trial was conducted. The trial recruited participants from January 9, 2015, to May 5, 2019, with follow-up between January 26, 2017, and July 31, 2021. Infants were recruited from 9 maternity hospitals in New Zealand and assessed at home or in a research clinic. Children born late preterm and at term at risk of neonatal hypoglycemia but without evidence of acute or imminent illness in the first hour after birth were screened and treated to maintain blood glucose concentrations greater than or equal to 47 mg/dL. EXPOSURES Hypoglycemia was defined as any blood glucose concentration less than 47 mg/dL, recurrent as 3 or more episodes, and severe as less than 36 mg/dL. MAIN OUTCOMES AND MEASURES Neurologic examination and tests of development (Bayley III) and executive function. The primary outcome was neurosensory impairment (any of the following: blindness, deafness, cerebral palsy, developmental delay, or executive function total score worse than 1.5 SD below the mean). RESULTS A total of 1197 of 1321 (91%) eligible children were assessed at a mean of corrected age 24 months; 616 (52%) were male. Compared with the normoglycemia group, children who experienced hypoglycemia were more likely to have neurosensory impairment (111 [23%] vs 125 [18%]; adjusted risk ratio [aRR], 1.28; 95% CI, 1.01-1.60), particularly if they experienced severe episodes (30 [28%] vs 125 [18%]; aRR, 1.68; 95% CI, 1.20-2.36), but not recurrent episodes (12 [19%] vs 125 [18%]; aRR, 1.06; 95% CI, 0.63-1.80). The risk of cognitive, language, or motor delay was similar between groups, but children who experienced hypoglycemia had lower Bayley-III composite cognitive (adjusted mean difference [aMD], -1.48; 95% CI, -2.79 to -0.18) and motor scores (aMD, -2.05; 95% CI, -3.30 to -0.79). CONCLUSIONS AND RELEVANCE In children born at risk of hypoglycemia but otherwise well, those who experienced neonatal hypoglycemia were more likely to have neurosensory impairment at corrected age 2 years, with higher risks after severe episodes. Further research is required to determine causality.
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Kuo J, Petrie KJ, Alsweiler JM. Prioritising long-term outcomes for preterm babies: A survey of consumers and clinicians. J Paediatr Child Health 2022; 58:1778-1785. [PMID: 35770605 PMCID: PMC9796048 DOI: 10.1111/jpc.16093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 05/30/2022] [Accepted: 06/07/2022] [Indexed: 12/30/2022]
Abstract
AIM To determine if consumers and clinicians believe intelligence or health outcomes are more important long-term outcomes for babies born preterm. METHODS Prospective, online survey of six outcomes ranked using a hierarchy ladder, Likert scale and a hypothetical scenario: education (complete secondary school); longevity (70 years of age or more); money (sufficient for rent and food); normal weight; good health and intelligence. Participants were clinicians taking care of preterm babies, parents of preterm babies, ex-preterm adults and adult controls. RESULTS The survey was completed by 145 participants (35 controls, 36 clinicians, 39 parents and 35 ex-preterm adults). Health was the most frequently top-ranked variable on the hierarchy ladder (health; 99/145 (68.3%), money; 17/145 (11.7%), longevity; 10/145 (6.9%), education; 8/145 (5.5%), normal weight; 6/145 (4.1%), intelligence; 5/145 (3.4%), P < 0.0001), with no statistical difference between the groups. On a 5-point Likert scale, participants were most likely to agree that sufficient money, health and finishing secondary school were important for preterm babies to have a good life (mean (SD): money 4.43 (0.81); health 4.39 (0.72); education 4.37 (0.81); normal weight 4.10 (0.81); intelligence 4.03 (0.94); longevity 4.01 (1.07), P < 0.0001). In the scenario, the option of an ex-preterm adult having a healthy life with low socio-economic status (SES), was preferred over high SES with an unhealthy life (p < 0.0001). CONCLUSIONS Health was perceived as the most important long-term outcome for preterm babies. Future research should prioritise good health outcomes for babies born preterm.
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Crowther CA, Samuel D, Hughes R, Tran T, Brown J, Alsweiler JM. Tighter or less tight glycaemic targets for women with gestational diabetes mellitus for reducing maternal and perinatal morbidity: A stepped-wedge, cluster-randomised trial. PLoS Med 2022; 19:e1004087. [PMID: 36074760 PMCID: PMC9455881 DOI: 10.1371/journal.pmed.1004087] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 08/04/2022] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Treatment for gestational diabetes mellitus (GDM) aims to reduce maternal hyperglycaemia. The TARGET Trial assessed whether tighter compared with less tight glycaemic control reduced maternal and perinatal morbidity. METHODS AND FINDINGS In this stepped-wedge, cluster-randomised trial, identification number ACTRN12615000282583, 10 hospitals in New Zealand were randomised to 1 of 5 implementation dates. The trial was registered before the first participant was enrolled. All hospitals initially used less tight targets (fasting plasma glucose (FPG) <5.5 mmol/L (<99 mg/dL), 1-hour <8.0 mmol/L (<144 mg/dL), 2 hour postprandial <7.0 mmol/L (<126 mg/dL)) and every 4 months, 2 hospitals moved to use tighter targets (FPG ≤5.0 mmol/L (≤90 mg/dL), 1-hour ≤7.4 mmol/L (≤133 mg/dL), 2 hour postprandial ≤6.7 mmol/L) (≤121 mg/dL). Women with GDM, blinded to the targets in use, were eligible. The primary outcome was large for gestational age. Secondary outcomes assessed maternal and infant health. Analyses were by intention to treat. Between May 2015 and November 2017, data were collected from 1,100 women with GDM (1,108 infants); 598 women (602 infants) used the tighter targets and 502 women (506 infants) used the less tight targets. The rate of large for gestational age was similar between the treatment target groups (88/599, 14.7% versus 76/502, 15.1%; adjusted relative risk [adjRR] 0.96, 95% confidence interval [CI] 0.66 to 1.40, P = 0.839). The composite serious health outcome for the infant of perinatal death, birth trauma, or shoulder dystocia was apparently reduced in the tighter group when adjusted for gestational age at diagnosis of GDM, BMI, ethnicity, and history of GDM compared with the less tight group (8/599, 1.3% versus 13/505, 2.6%, adjRR 0.23, 95% CI 0.06 to 0.88, P = 0.032). No differences were seen for the other infant secondary outcomes apart from a shorter stay in intensive care (P = 0.041). Secondary outcomes for the woman showed an apparent increase for the composite serious health outcome that included major haemorrhage, coagulopathy, embolism, and obstetric complications in the tighter group (35/595, 5.9% versus 15/501, 3.0%, adjRR 2.29, 95% CI 1.14 to 4.59, P = 0.020). There were no differences between the target groups in the risk for pre-eclampsia, induction of labour, or cesarean birth, but more women using tighter targets required pharmacological treatment (404/595, 67.9% versus 293/501, 58.5%, adjRR 1.20, 95% CI 1.00 to 1.44, P = 0.047). The main study limitation is that the treatment targets used may vary to those in use in some countries. CONCLUSIONS Tighter glycaemic targets in women with GDM compared to less tight targets did not reduce the risk of a large for gestational age infant, but did reduce serious infant morbidity, although serious maternal morbidity was increased. These findings can be used to aid decisions on the glycaemic targets women with GDM should use. TRIAL REGISTRATION The Australian New Zealand Clinical Trials Registry (ANZCTR). ACTRN12615000282583.
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St Clair SL, Harding JE, O'Sullivan JM, Gamble GD, Alsweiler JM, Vatanen T. Effect of prophylactic dextrose gel on the neonatal gut microbiome. Arch Dis Child Fetal Neonatal Ed 2022; 107:501-507. [PMID: 34857640 PMCID: PMC9160211 DOI: 10.1136/archdischild-2021-322757] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 11/05/2021] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To determine the effect of prophylactic dextrose gel on the infant gut microbiome. DESIGN Observational cohort study nested in a randomised trial. SETTING Three maternity hospitals in New Zealand. PATIENTS Infants at risk of neonatal hypoglycaemia whose parents consented to participation in the hypoglycaemia Prevention in newborns with Oral Dextrose trial (hPOD). Infants were randomised to receive prophylactic dextrose gel or placebo gel, or were not randomised and received no gel (controls). Stool samples were collected on days 1, 7 and 28. MAIN OUTCOME MEASURES The primary outcome was microbiome beta-diversity at 4 weeks. Secondary outcomes were beta-diversity, alpha-diversity, bacterial DNA concentration, microbial community stability and relative abundance of individual bacterial taxa at each time point. RESULTS We analysed 434 stool samples from 165 infants using 16S rRNA gene amplicon sequencing. There were no differences between groups in beta-diversity at 4 weeks (p=0.49). There were also no differences between groups in any other microbiome measures including beta-diversity (p=0.53 at day 7), alpha-diversity (p=0.46 for day 7 and week 4), bacterial DNA concentration (p=0.91), microbial community stability (p=0.52) and microbial relative abundance at genus level. There was no evidence that exposure to any dextrose gel (prophylaxis or treatment) had any effect on the microbiome. Mode of birth, type of milk fed, hospital of birth and ethnicity were all associated with differences in the neonatal microbiome. CONCLUSIONS Clinicians and consumers can be reassured that dextrose gel used for prophylaxis or treatment of neonatal hypoglycaemia does not alter the neonatal gut microbiome. TRIAL REGISTRATION NUMBER 12614001263684.
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Laing D, Walsh E, Alsweiler JM, Hanning SM, Meyer MP, Ardern J, Cutfield WS, Rogers J, Gamble GD, Chase JG, Harding JE, McKinlay CJ. Oral diazoxide versus placebo for severe or recurrent neonatal hypoglycaemia: Neonatal Glucose Care Optimisation (NeoGluCO) study - a randomised controlled trial. BMJ Open 2022; 12:e059452. [PMID: 35977769 PMCID: PMC9389093 DOI: 10.1136/bmjopen-2021-059452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
INTRODUCTION Infants with severe or recurrent transitional hypoglycaemia continue to have high rates of adverse neurological outcomes and new treatment approaches are needed that target the underlying pathophysiology. Diazoxide is one such treatment that acts on the pancreatic β-cell in a dose-dependent manner to decrease insulin secretion. METHODS AND ANALYSIS Phase IIB, double-blind, two-arm, parallel, randomised trial of diazoxide versus placebo in neonates ≥35 weeks' gestation for treatment of severe (blood glucose concentration (BGC)<1.2 mmol/L or BGC 1.2 to <2.0 mmol/L despite two doses of buccal dextrose gel and feeding in a single episode) or recurrent (≥3 episodes <2.6 mmol/L in 48 hours) transitional hypoglycaemia. Infants are loaded with diazoxide 5 mg/kg orally and then commenced on a maintenance dose of 1.5 mg/kg every 12 hours, or an equal volume of placebo. The intervention is titrated from the third maintenance dose by protocol to target BGC in the range of 2.6-5.4 mmol/L. The primary outcome is time to resolution of hypoglycaemia, defined as the first point at which the following criteria are met concurrently for ≥24 hours: no intravenous fluids, enteral bolus feeding and normoglycaemia. Groups will be compared for the primary outcome using Cox's proportional hazard regression analysis, expressed as adjusted HR with a 95% CI. ETHICS AND DISSEMINATION This trial has been approved by the Health and Disability Ethics Committees of New Zealand (19CEN189). Findings will be disseminated in peer-reviewed journals, to clinicians and researchers at local and international conferences and to the public. TRIAL REGISTRATION NUMBER ACTRN12620000129987.
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Oliphant EA, Purohit TJ, Alsweiler JM, McKinlay CJD, Hanning SM. Validation and application of a simple and rapid stability-indicating liquid chromatographic assay for the quantification of caffeine from human saliva. J LIQ CHROMATOGR R T 2022. [DOI: 10.1080/10826076.2022.2095402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Tottman AC, Bloomfield FH, Cormack BE, Harding JE, Taylor J, Alsweiler JM. Correction: Sex-specific relationships between early nutrition and neurodevelopment in preterm infants. Pediatr Res 2022; 91:1627. [PMID: 34040163 DOI: 10.1038/s41390-021-01582-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Shah R, Dai DWT, Alsweiler JM, Brown GTL, Chase JG, Gamble GD, Harris DL, Keegan P, Nivins S, Wouldes TA, Thompson B, Turuwhenua J, Harding JE, McKinlay CJD. Association of Neonatal Hypoglycemia With Academic Performance in Mid-Childhood. JAMA 2022; 327:1158-1170. [PMID: 35315886 PMCID: PMC8941348 DOI: 10.1001/jama.2022.0992] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
IMPORTANCE Neonatal hypoglycemia is associated with increased risk of poor executive and visual-motor function, but implications for later learning are uncertain. OBJECTIVE To test the hypothesis that neonatal hypoglycemia is associated with educational performance at age 9 to 10 years. DESIGN, SETTING, AND PARTICIPANTS Prospective cohort study of moderate to late preterm and term infants born at risk of hypoglycemia. Blood and masked interstitial sensor glucose concentrations were measured for up to 7 days. Infants with hypoglycemic episodes (blood glucose concentration <47 mg/dL [2.6 mmol/L]) were treated to maintain a blood glucose concentration of at least 47 mg/dL. Six hundred fourteen infants were recruited at Waikato Hospital, Hamilton, New Zealand, in 2006-2010; 480 were assessed at age 9 to 10 years in 2016-2020. EXPOSURES Hypoglycemia was defined as at least 1 hypoglycemic event, representing the sum of nonconcurrent hypoglycemic and interstitial episodes (sensor glucose concentration <47 mg/dL for ≥10 minutes) more than 20 minutes apart. MAIN OUTCOMES AND MEASURES The primary outcome was low educational achievement, defined as performing below or well below the normative curriculum level in standardized tests of reading comprehension or mathematics. There were 47 secondary outcomes related to executive function, visual-motor function, psychosocial adaptation, and general health. RESULTS Of 587 eligible children (230 [48%] female), 480 (82%) were assessed at a mean age of 9.4 (SD, 0.3) years. Children who were and were not exposed to neonatal hypoglycemia did not significantly differ on rates of low educational achievement (138/304 [47%] vs 82/176 [48%], respectively; adjusted risk difference, -2% [95% CI, -11% to 8%]; adjusted relative risk, 0.95 [95% CI, 0.78-1.15]). Children who were exposed to neonatal hypoglycemia, compared with those not exposed, were significantly less likely to be rated by teachers as being below or well below the curriculum level for reading (68/281 [24%] vs 49/157 [31%], respectively; adjusted risk difference, -9% [95% CI, -17% to -1%]; adjusted relative risk, 0.72 [95% CI, 0.53-0.99; P = .04]). Groups were not significantly different for other secondary end points. CONCLUSIONS AND RELEVANCE Among participants at risk of neonatal hypoglycemia who were screened and treated if needed, exposure to neonatal hypoglycemia compared with no such exposure was not significantly associated with lower educational achievement in mid-childhood.
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Edwards T, Alsweiler JM, Crowther CA, Edlin R, Gamble GD, Hegarty JE, Lin L, McKinlay CJD, Rogers JA, Thompson B, Wouldes TA, Harding JE. Prophylactic Oral Dextrose Gel and Neurosensory Impairment at 2-Year Follow-up of Participants in the hPOD Randomized Trial. JAMA 2022; 327:1149-1157. [PMID: 35315885 PMCID: PMC8941358 DOI: 10.1001/jama.2022.2363] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 02/07/2022] [Indexed: 01/24/2023]
Abstract
Importance Prophylactic oral dextrose gel reduces neonatal hypoglycemia, but later benefits or harms remain unclear. Objective To assess the effects on later development of prophylactic dextrose gel for infants born at risk of neonatal hypoglycemia. Design, Setting, and Participants Prospective follow-up of a multicenter randomized clinical trial conducted in 18 Australian and New Zealand hospitals from January 2015 to May 2019. Participants were late preterm or term at-risk infants; those randomized in 9 New Zealand centers (n = 1359) were included and followed up between January 2017 and July 2021. Interventions Infants were randomized to prophylactic 40% dextrose (n = 681) or placebo (n = 678) gel, 0.5 mL/kg, massaged into the buccal mucosa 1 hour after birth. Main Outcomes and Measures The primary outcome of this follow-up study was neurosensory impairment at 2 years' corrected age. There were 44 secondary outcomes, including cognitive, language, and motor composite Bayley-III scores (mean [SD], 100 [15]; higher scores indicate better performance). Results Of eligible infants, 1197 (91%) were assessed (581 females [49%]). Neurosensory impairment was not significantly different between the dextrose and placebo gel groups (20.8% vs 18.7%; unadjusted risk difference [RD], 2.09% [95% CI, -2.43% to 6.60%]; adjusted risk ratio [aRR], 1.13 [95% CI, 0.90 to 1.41]). The risk of cognitive and language delay was not significantly different between the dextrose and placebo groups (cognitive: 7.6% vs 5.3%; RD, 2.32% [95% CI, -0.46% to 5.11%]; aRR, 1.40 [95% CI, 0.91 to 2.17]; language: 17.0% vs 14.7%; RD, 2.35% [95% CI, -1.80% to 6.50%]; aRR, 1.19 [95% CI, 0.92 to 1.54]). However, the dextrose gel group had a significantly higher risk of motor delay (2.5% vs 0.7%; RD, 1.81% [95% CI, 0.40% to 3.23%]; aRR, 3.79 [95% CI, 1.27 to 11.32]) and significantly lower composite scores for cognitive (adjusted mean difference [aMD], -1.30 [95% CI, -2.55 to -0.05]), language (aMD, -2.16 [95% CI, -3.86 to -0.46]), and motor (aMD, -1.40 [95% CI, -2.60 to -0.20]) performance. There were no significant differences between groups in the other 27 secondary outcomes. Conclusions and Relevance Among late preterm and term infants born at risk of neonatal hypoglycemia, prophylactic oral 40% dextrose gel at 1 hour of age, compared with placebo, resulted in no significant difference in the risk of neurosensory impairment at 2 years' corrected age. However, the study may have been underpowered to detect a small but potentially clinically important increase in risk, and further research including longer-term follow-up is required. Trial Registration anzctr.org.au Identifier: ACTRN12614001263684.
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Nivins S, Kennedy E, Thompson B, Gamble GD, Alsweiler JM, Metcalfe R, McKinlay CJD, Harding JE. Associations between neonatal hypoglycaemia and brain volumes, cortical thickness and white matter microstructure in mid-childhood: An MRI study. Neuroimage Clin 2022; 33:102943. [PMID: 35063925 PMCID: PMC8856905 DOI: 10.1016/j.nicl.2022.102943] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 01/11/2022] [Accepted: 01/13/2022] [Indexed: 11/11/2022]
Abstract
Neonatal hypoglycaemia is associated with damage to the brain in the acute phase. In mid-childhood, neonatal hypoglycaemia is associated with smaller brain regions. Deep grey matter regions such as the caudate and thalamus are implicated. Children with neonatal hypoglycemia had smaller occipital lobe cortical thickness. Grey matter may be especially vulnerable to long-term effects of neonatal hypoglycemia.
Neonatal hypoglycaemia is a common metabolic disorder that may cause brain damage, most visible in parieto-occipital regions on MRI in the acute phase. However, the long term effects of neonatal hypoglycaemia on the brain are not well understood. We investigated the association between neonatal hypoglycaemia and brain volumes, cortical thickness and white matter microstructure at 9–10 years. Children born at risk of neonatal hypoglycaemia at ≥ 36 weeks’ gestation who took part in a prospective cohort study underwent brain MRI at 9–10 years. Neonatal hypoglycaemia was defined as at least one hypoglycaemic episode (at least one consecutive blood glucose concentration < 2.6 mmol/L) or interstitial episode (at least 10 min of interstitial glucose concentrations < 2.6 mmol/L). Brain volumes and cortical thickness were computed using Freesurfer. White matter microstructure was assessed using tract-based spatial statistics. Children who had (n = 75) and had not (n = 26) experienced neonatal hypoglycaemia had similar combined parietal and occipital lobe volumes and no differences in white matter microstructure at nine years of age. However, those who had experienced neonatal hypoglycaemia had smaller caudate volumes (mean difference: −557 mm3, 95% confidence interval (CI), −933 to −182, p = 0.004) and smaller thalamus (−0.03%, 95%CI, −0.06 to 0.00; p = 0.05) and subcortical grey matter (−0.10%, 95%CI −0.20 to 0.00, p = 0.05) volumes as percentage of total brain volume, and thinner occipital lobe cortex (−0.05 mm, 95%CI −0.10 to 0.00, p = 0.05) than those who had not. The finding of smaller caudate volumes after neonatal hypoglycaemia was consistent across analyses of pre-specified severity groups, clinically detected hypoglycaemic episodes, and severity and frequency of hypoglycaemic events. Neonatal hypoglycaemia is associated with smaller deep grey matter brain regions and thinner occipital lobe cortex but not altered white matter microstructure in mid-childhood.
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Alexander T, Meyer M, Harding JE, Alsweiler JM, Jiang Y, Wall C, Muelbert M, Bloomfield FH. Nutritional Management of Moderate- and Late-Preterm Infants Commenced on Intravenous Fluids Pending Mother's Own Milk: Cohort Analysis From the DIAMOND Trial. Front Pediatr 2022; 10:817331. [PMID: 35433556 PMCID: PMC9008239 DOI: 10.3389/fped.2022.817331] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 03/03/2022] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Exclusive breastmilk is the desired enteral nutrition for babies born moderate- and late-preterm between 32+0 and 36+6 weeks' gestation; however, this goal is often difficult to achieve. METHODS A prospective cohort of babies 32+0 -35+6 weeks' gestation enrolled in the DIAMOND trial were randomized to a condition specifying that babies should receive mother's own milk (MOM) as the only enteral feed. Factors associated with the successful transition to MOM, defined as MOM being the sole enteral feeding at the time of the first cessation of intravenous (IV) fluids, were investigated by logistic regression. Time to commencement of a milk other than MOM was analyzed by Kaplan-Meier survival curves. RESULTS A total of 151 eligible babies (60% boys) were included, 93 (63%) of whom successfully transitioned from IV fluids onto MOM only. Alternative sources of milk, mostly formula, were used to transition from IV fluids onto enteral feeds more often in multiples and Māori, and was commenced earlier in Māori than other ethnicities (p = 0.007) and in late-preterm compared with moderate-preterm babies (p=0.01). Receiving exclusively breastmilk at discharge was more likely for babies who successfully transitioned from IV fluids onto MOM only [OR (95% confidence intervals) 4.9 (2.3-10.6)] and who received only MOM in the first week after birth [4.8 (2.2-10.4)], both p < 0.0001. Receiving breastmilk exclusively at discharge was less likely for Māori than Caucasian babies [0.2 (0.1-0.6), p < 0.0006]. There was no difference in the use of alternative sources of milk in babies who received parenteral nutrition or dextrose or between small-for-gestational-age and appropriate-for-gestational-age babies. CONCLUSIONS Despite an intention to provide only MOM, significant numbers of moderate- and late-preterm babies received formula to transition from IV fluids, and this differed by ethnicity. The drivers underlying these decisions require further investigation. These data highlight an urgent need for quality initiatives to support and encourage mothers of moderate- and late-preterm babies in their lactation.
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