Improving neonatal unit admission temperatures in preterm babies: exothermic mattresses, polythene bags or a traditional approach?

Thermoregulation for very preterm infants in the delivery room: a narrative review

Abnormal temperature in preterm infants is associated with increased morbidity and mortality. Infants born prematurely are at risk of abnormal temperature immediately after birth in the delivery room (DR). The World Health Organization (WHO) recommends that the temperature of newly born infants is maintained between 36.5-37.5oC after birth. When caring for very preterm infants, the International Liaison Committee on Resuscitation (ILCOR) recommends using a combination of interventions to prevent heat loss. While hypothermia remains prevalent, efforts to prevent it have increased the incidence of hyperthermia, which may also be harmful. Delayed cord clamping (DCC) for preterm infants has been recommended by ILCOR since 2015. Little is known about the effect of timing of DCC on temperature, nor have there been specific recommendations for thermal care before DCC. This review article focuses on the current evidence and recommendations for thermal care in the DR, and considers thermoregulation in the context of emerging interventions and future research directions. IMPACT: Abnormal temperature is common amongst very preterm infants after birth, and is an independent risk factor for mortality. The current guidelines recommend a combination of interventions to prevent heat loss after birth. Despite this, abnormal temperature is still a problem, across all climates and economies. New and emerging delivery room practice (i.e., delayed cord clamping, mobile resuscitation trolleys, early skin to skin care) may have an effect on infant temperature. This article reviews the current evidence and recommendations, and considers future research directions.

2023 International Consensus on Cardiopulmonary Resuscitation and Emergency Cardiovascular Care Science With Treatment Recommendations: Summary From the Basic Life Support; Advanced Life Support; Pediatric Life Support; Neonatal Life Support; Education, Implementation, and Teams; and First Aid Task Forces

The International Liaison Committee on Resuscitation engages in a continuous review of new, peer-reviewed, published cardiopulmonary resuscitation and first aid science. Draft Consensus on Science With Treatment Recommendations are posted online throughout the year, and this annual summary provides more concise versions of the final Consensus on Science With Treatment Recommendations from all task forces for the year. Topics addressed by systematic reviews this year include resuscitation of cardiac arrest from drowning, extracorporeal cardiopulmonary resuscitation for adults and children, calcium during cardiac arrest, double sequential defibrillation, neuroprognostication after cardiac arrest for adults and children, maintaining normal temperature after preterm birth, heart rate monitoring methods for diagnostics in neonates, detection of exhaled carbon dioxide in neonates, family presence during resuscitation of adults, and a stepwise approach to resuscitation skills training. Members from 6 International Liaison Committee on Resuscitation task forces have assessed, discussed, and debated the quality of the evidence, using Grading of Recommendations Assessment, Development, and Evaluation criteria, and their statements include consensus treatment recommendations. Insights into the deliberations of the task forces are provided in the Justification and Evidence-to-Decision Framework Highlights sections. In addition, the task forces list priority knowledge gaps for further research. Additional topics are addressed with scoping reviews and evidence updates.

Risk Factors for Admission Hyperthermia and Associated Outcomes in Infants Born Preterm

Maternal, placental, and neonatal factors were compared between infants born at ≤29 weeks of gestational age with admission hyperthermia (>37.5○C) and euthermia (36.5-37.5○C). Admission hyperthermia was associated with longer duration of face-mask positive-pressure ventilation and infant's temperature ≥37.5○C in the delivery room. Infants born preterm with admission hyperthermia had greater odds of developing necrotizing enterocolitis and neurodevelopmental impairment.

2023 International Consensus on Cardiopulmonary Resuscitation and Emergency Cardiovascular Care Science With Treatment Recommendations: Summary From the Basic Life Support; Advanced Life Support; Pediatric Life Support; Neonatal Life Support; Education, Implementation, and Teams; and First Aid Task Forces

The International Liaison Committee on Resuscitation engages in a continuous review of new, peer-reviewed, published cardiopulmonary resuscitation and first aid science. Draft Consensus on Science With Treatment Recommendations are posted online throughout the year, and this annual summary provides more concise versions of the final Consensus on Science With Treatment Recommendations from all task forces for the year. Topics addressed by systematic reviews this year include resuscitation of cardiac arrest from drowning, extracorporeal cardiopulmonary resuscitation for adults and children, calcium during cardiac arrest, double sequential defibrillation, neuroprognostication after cardiac arrest for adults and children, maintaining normal temperature after preterm birth, heart rate monitoring methods for diagnostics in neonates, detection of exhaled carbon dioxide in neonates, family presence during resuscitation of adults, and a stepwise approach to resuscitation skills training. Members from 6 International Liaison Committee on Resuscitation task forces have assessed, discussed, and debated the quality of the evidence, using Grading of Recommendations Assessment, Development, and Evaluation criteria, and their statements include consensus treatment recommendations. Insights into the deliberations of the task forces are provided in the Justification and Evidence-to-Decision Framework Highlights sections. In addition, the task forces list priority knowledge gaps for further research. Additional topics are addressed with scoping reviews and evidence updates.

Maintaining normothermia immediately after birth in preterm infants <34 weeks' gestation: A systematic review and meta-analysis

AIM

To evaluate delivery room (DR) interventions to prevent hypothermia and improve outcomes in preterm newborn infants <34 weeks' gestation.

METHODS

Medline, Embase, CINAHL and CENTRAL were searched till 22nd July 2022. Randomized controlled trials (RCTs), non-RCTs and quality improvement studies were considered. A random effects meta-analysis was performed, and the certainty of evidence was evaluated using GRADE guidelines.

RESULTS

DR temperature of ≥23 °C compared to standard care improved temperature outcomes without an increased risk of hyperthermia (low certainty), whereas radiant warmer in servo mode compared to manual mode decreased mean body temperature (MBT) (moderate certainty). Use of a plastic bag or wrap (PBW) improved normothermia (low certainty), but with an increased risk of hyperthermia (moderate certainty). Plastic cap improved normothermia (moderate certainty) and when combined with PBW improved MBT (low certainty). Use of a cloth cap decreased moderate hypothermia (low certainty). Though thermal mattress (TM) improved MBT, it increased risk of hyperthermia (low certainty). Heated-humidified gases (HHG) for resuscitation decreased the risk of moderate hypothermia and severe intraventricular hemorrhage (very low to low certainty). None of the interventions was shown to improve survival, but sample sizes were insufficient.

CONCLUSIONS

DR temperature of ≥23 °C, radiant warmer in manual mode, use of a PBW and a head covering is suggested for preterm newborn infants <34 weeks' gestation. HHG and TM could be considered in addition to PBW provided resources allow, in settings where hypothermia incidence is high. Careful monitoring to avoid hyperthermia is needed.

Neonatal Golden Hour: a review of current best practices and available evidence

PURPOSE OF REVIEW

Recommendations made by several scientific bodies advocate for adoption of evidence-based interventions during the first 60 min of postnatal life, also known as the 'Golden Hour', to better support the fetal-to-neonatal transition. Implementation of a Golden Hour protocol leads to improved short-term and long-term outcomes, especially in extremely premature and extreme low-birth-weight (ELBW) neonates. Unfortunately, several recent surveys have highlighted persistent variability in the care provided to this vulnerable population in the first hour of life.

RECENT FINDINGS

Since its first adoption in the neonatal ICU (NICU) in 2009, published literature shows a consistent benefit in establishing a Golden Hour protocol. Improved short-term outcomes are reported, including reductions in hypothermia and hypoglycemia, efficiency in establishing intravenous access, and timely initiation of fluids and medications. Additionally, long-term outcomes report decreased risk for bronchopulmonary dysplasia (BPD), intraventricular hemorrhage (IVH) and retinopathy of prematurity (ROP).

SUMMARY

Critical to the success and sustainability of any Golden Hour initiative is recognition of the continuous educational process involving multidisciplinary team collaboration to ensure coordination between providers in the delivery room and beyond. Standardization of practices in the care of extremely premature neonates during the first hour of life leads to improved outcomes.

VIDEO ABSTRACT

http://links.lww.com/MOP/A68 .

Conductive thermal mattress versus routine care to reduce neonatal hypothermia during transport among low-birthweight neonates: An experimental study with historical controls

Background

Neonatal hypothermia at delivery, during transport and in the postnatal wards is common, under-recognized and infrequently monitored with prevalence ranging from 32% to 85%. This study compared conductive thermal mattress to routine care for prevention of hypothermia among low-birthweight (LBW) neonates during transport.

Methods

From July 2015 to November 2016 (historical controls), all eligible LBW neonates (1500-2499 g) were transported from the labour room/operation theatre to the neonatal intensive care unit (NICU)/postnatal wards using routine care (towels, blankets, cap, mittens and socks) and from December 2016 to December 2018 using conductive thermal mattress (EMBRACETM) Axillary temperature was measured before transport and at arrival in the NICU/postnatal wards using a digital thermometer.

Results

A total of 154 and 102 neonates were transported using conductive thermal mattress and routine care, respectively. The mean standard deviation (SD) axillary temperature at arrival in the postnatal wards in conductive thermal mattress and routine care group was 36.6 (0.6) ⁰C and 36.4 (0.5) ⁰C, respectively (p-value 0.005). Relative Risk (RR) of mild and moderate neonatal hypothermia among neonates transported using conductive thermal mattress compared to routine care group was 0.59 (0.33,1.07), number needed to treat (NNT) of 13 and 0.22 (0.04,1.07), NNT 22 respectively.

Conclusions

Use of conductive thermal mattress for transport among LBW neonates led to a significant, although clinically small improvement in admission temperatures at the NICU/postnatal ward and non-significant decrease in the incidence of hypothermia.

A standardized implementation of multicenter quality improvement program of very low birth weight newborns could significantly reduce admission hypothermia and improve outcomes

Background

Admission hypothermia (AH, < 36.5℃) remains a major challenge for global neonatal survival, especially in developing countries. Baseline research shows nearly 89.3% of very low birth weight (VLBW, < 1500 g) infants suffer from AH in China. Therefore, a prospective multicentric quality improvement (QI) initiative to reduce regional AH and improve outcomes among VLBW neonates was implemented.

Methods

The study used a sequential Plan—Do—Study—Act (PDSA) approach. Clinical data were collected prospectively from 5 NICUs within the Sino-Northern Neonatal Network (SNN) in China. The hypothermia prevention bundle came into practice on January 1, 2019. The clinical characteristics and outcomes data in the pre-QI phase (January 1, 2018– December 31, 2018) were compared with that from the post-QI phase (January 1, 2019–December 31, 2020). Clinical characteristics and outcomes data were analyzed.

Results

A total of 750 in-born VLBW infants were enrolled in the study, 270 in the pre-QI period and 480 in the post- QI period, respectively. There were no significant differences in clinical characteristics of infants between these two phases. Compared with pre-QI period, the incidence of AH was decreased significantly after the QI initiative implementation in the post-QI period (95.9% vs. 71.3%, P < 0.01). Incidence of admission moderate-to-severe hypothermia (AMSH, < 36℃) also decreased significantly, manifesting a reduction to 38.5% in the post-QI (68.5% vs 30%, P < 0.01). Average admission temperature improved from after QI (35.5 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\pm$$\end{document}± 0.7℃ vs. 36.0 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\pm$$\end{document}± 0.6℃, P < 0.01). There was no increase in proportion the number of infants with a temperature of > 37.5 °C or thermal burns between the two groups. The risk ratio of mortality in infants during the post-QI period was significantly lower in the post-QI period as compared to the pre-QI period [adjusted risk ratio (aRR): 0.26, 95% confidence interval (CI): 0.13–0.50]. The risk ratio of late-onset neonatal sepsis (LOS) also significantly lowered in the post-QI period (aRR: 0.66, 95% CI: 0.50–0.87).

Conclusion

Implementation of multicentric thermoregulatory QI resulted in a significant reduction in AH and AMSH in VLBW neonates with associated reduction in mortality. We gained a lot from the QI, and successfully aroused the attention of perinatal medical staff to neonatal AH. This provided a premise for continuous quality improvement of AH in the future, and might provide a reference for implementation of similar interventions in developing countries.

Trial registration

Trial registration number: ChiCTR1900020861. Date of registration: 21 January 2019(21/01/2019). Prospectively registered. 

Supplementary Information

The online version contains supplementary material available at 10.1186/s12887-022-03310-5.

Hypothermia and neonatal morbimortality in very low birth weight preterm infants

OBJECTIVE

To assess the prevalence of hypothermia in the delivery room, at admission, and 2 to 3 hours after admission in the neonatal intensive care unit (NICU), factors associated and possible relationship with morbidity and mortality in preterm infants with very low birth weight (VLBW).

METHODS

Cross-sectional study with data collection based on a retrospective review of medical records and including infants born in 2016 and 2017, with birth weights <1500g, and gestational ages <34 weeks. Data about VLBW preterm infants, maternal data and temperature in the delivery room were analyzed. Hypothermia was considered when axillary temperature <36°C. For statistical analysis, the chi-square test or G test, canonical and Spearman correlation, and logistic regression were used.

RESULTS

149 newborns (NB) were included in the study. The prevalence of hypothermia in delivery room, at admission to the NICU and 2 to 3 hours after admission was 25.8%, 41.5% and 40.2%, respectively. The temperature of NBs was directly proportional to gestational age (p<0.010), birth weight (p<0.010), and Apgar score (p<0.050). There was an inverse association with hypothermia in the delivery room and cesarean delivery (OR 0.25; p=0.016).

CONCLUSIONS

Hypothermia was a prevalent problem in the studied population. The neonatal temperature was directly proportional to gestational age, birth weight and Apgar score. Hypothermia was associated with maternal factors, such as cesarean delivery. It is necessary to implement and improve strategies for its prevention.

A multimodal quality improvement approach to promote normothermia in very preterm infants

AIM

To achieve the National Neonatal Audit Programme (NNAP) standard of 90% normothermia among preterm infants born under 30 weeks of gestation.

METHODS

Project SHIP (Stopping Hypothermia In Premmies) was a quality improvement programme to improve admission normothermia. Phase 1 of the project implemented low-fidelity simulations during 2011-2016. In Phase 2 (2017), a multimodal approach to quality improvement was used, including in situ simulations, videos of simulated scenarios, an allocated team member for thermal care, a clear protocol for thermal care, a coordinating 'lollipop man' role and monthly performance feedback. Additionally, continuous temperature monitoring using servo-control during stabilisation was introduced during Phase 2. Phase 3 (2018-2019) focused on embedding practice and maintaining performance.

RESULTS

Phase 1 initiatives resulted in improvement of normothermia rates from 58% to 75%. However, the results plateaued. During Phase 2, the hypothermia rate fell from 16% to 3%. During Phase 3, this improvement in the hypothermia rate was sustained, achieving the standard of 90% normothermia in 2018 and falling just short in 2019 due to an increased hyperthermia rate.

CONCLUSION

A multimodal quality improvement approach achieved sustained improvement in normothermia. Continuous temperature monitoring during stabilisation allows resuscitating teams to plan interventions to treat hypothermia and hyperthermia.

Comparison of rectal and axillary temperature measurements in preterm newborns

OBJECTIVE

To compare rectal and axillary temperatures in preterm newborns on admission to the neonatal intensive care unit (NICU).

DESIGN

Secondary analysis of data collected in a randomised controlled trial (RCT).

SETTING

Maternity hospital, level 3 NICU.

PATIENTS

Seventy-two newborns <31 weeks who were enrolled in the BAMBINO RCT (A randomised trial of exothermic mattresses to prevent heat loss in preterm infants at birth, ISRCTN31707342).

INTERVENTIONS

Newborns were placed in polyethylene bags and were randomised to placement on exothermic mattresses, or not in the delivery room. All infants had rectal and axillary temperatures measured in immediate succession using a digital thermometer on NICU admission.

OUTCOME MEASURES

Admission rectal and axillary temperatures.

RESULTS

Mean (SD) gestational age was 28 (2) weeks and birth weight was 1138 (374) g. Mean rectal-axillary temperature difference was 0.1 (0.5°C) (range -1.4°C to +1.5°C). Rectal and axillary temperatures differed by ≥0.5°C in 18/72 (25%) infants; axillary temperature was higher than rectal in 6 (8%) and lower in 12 (17%). There was a positive linear relationship between rectal and axillary measurements (Pearson's correlation R=0.84). Applying the Bland-Altman technique, the width of 95% prediction interval was 1.8°C (-0.8°C to 1.0°C) implying that rectal and axillary measurements may vary by up to 1.0°C. Axillary temperature had a sensitivity of 65% when used to detect rectal hyperthermia and 100% sensitivity for hypothermia.

CONCLUSION

Paired rectal and axillary temperature measurements in preterm newborns on NICU admission vary significantly. Axillary temperature was sensitive at detecting rectal hypothermia but not hyperthermia. Axillary temperature may not be an accurate proxy for rectal temperature measurement in all preterm newborns on NICU admission.

Singapore Neonatal Resuscitation Guidelines 2021

Neonatal resuscitation is a coordinated, team-based series of timed sequential steps that focuses on a transitional physiology to improve perinatal and neonatal outcomes. The practice of neonatal resuscitation has evolved over time and continues to be shaped by emerging evidence as well as key opinions. We present the revised Neonatal Resuscitation Guidelines for Singapore 2021. The recommendations from the International Liaison Committee on Resuscitation Neonatal Task Force Consensus on Science and Treatment Recommendations (2020) and guidelines from the American Heart Association and European Resuscitation Council were compared with existing guidelines. The recommendations of the Neonatal Subgroup of the Singapore Resuscitation and First Aid Council were derived after the work group discussed and appraised the current available evidence and their applicability to local clinical practice.

Delivery room care and neonatal resuscitation while on intact placental circulation: an open-label, single-arm study

OBJECTIVE

To assess feasibility, safety, usability and learnability of delivery room care and resuscitation with intact placental circulation (RIPC) at mother's bedside.

MATERIALS AND METHODS

We included neonates ≥24 weeks GA after parental consent. Both in vigorous and babies requiring resuscitation, appropriate steps of resuscitation were provided with intact cord till 3 min using RIPC warmer. Outcomes were assessed by set criteria and standard system usability scale.

RESULTS

Of 380 enrolled, intervention was feasible in 376 babies (98.9%). Safety criteria were met in all 376 babies received onto the trolley (100%). Median GA was 38 (37-39) weeks and median BW 2740 (2330-3120) g. Of 376, 92 required resuscitation; 90 (97.8%) PPV, 49 (53.2%) intubations and 13 (14.1%) chest compressions. System Usability Score rated >68 (good) in 90% and 52-68 (fair) in 10%. Temperature at 5 min was 36.5 ± 0.1.

CONCLUSIONS

Delivery room care and neonatal RIPC is feasible and safe across gestations.

The effect of thermoregulation quality improvement initiatives on the admission temperature of premature/very low birth-weight infants in neonatal intensive care units: A systematic review

PURPOSE

The purpose of this review was to ascertain the impact of thermoregulation quality improvement initiatives (QIs) on the admission temperatures of premature/very-low-birth-weight infants in neonatal intensive care units (NICUs).

METHODS

A systematic search of databases Cumulative Index to Nursing and Allied Health Literature, Medline, Embase, and the Cochrane library was carried out. Specific inclusion and exclusion criteria were adhered to, with no publication date limitations added. The chosen studies were examined for quality, data were extracted and analysed, before a narrative synthesis was performed. The last search occurred on January 7, 2019, with PRISMA flow diagrams completed for identified studies.

RESULTS

Ten studies of varying methodology design were included in this review. Variations of thermoregulation interventions were included in the 10 studies. Nevertheless, all of them demonstrated that admission temperature rates can be significantly improved by implementing a thermoregulation QI. The multidisciplinary team and ongoing education were seen as much needed components to the overall sustainability, and continuing success of the QI's.

PRACTICAL IMPLICATIONS

This systematic review determines that thermoregulation QIs can positively impact the admission temperatures of premature/very-low-birth-weight infants in the NICU. Prevention of hypothermia is aimed at reducing the risks of developing major neonatal morbidities. The pooling of the results from the 10 studies helps in the sharing of outcome measures and thus, improving quantitative synthesis. More frequent monitoring of the axillary temperature would help in preventing hypothermia and hyperthermia occurring. Ongoing education and staff training are essential for managing thermoregulation successfully. Examining the compliance rates to such quality initiatives, and the variations in interventions would benefit from further research to ensure better standardisation of clinical practice.

Enhanced monitoring during neonatal resuscitation

Immediately after birth through spontaneous breaths, infants' clear lung liquid replacing it with air, and gradually establishing a functional residual capacity to achieve gas exchange. Most infants start breathing independently after birth and ~3% of infants who require positive pressure ventilation. When newborns fail to start breathing the current neonatal resuscitation guidelines recommend initiatingpositive pressure ventilationusing a face mask and a ventilation device. Adequate ventilation is the cornerstone of successful neonatal resuscitation; therefore, it is mandatory that anybody involved in neonatal resuscitation is trained in mask ventilation techniques. One of the main problems with mask ventilation is that it is very subjective with direct feedback lacking and not uncommonly, the resuscitator does not realise that their technique is unsatisfactory. Many studies have shown that monitoring tidal volume and leak around the mask or endotracheal tube enables the resuscitator to identify the problem and adjust their technique to reduce the leak and deliver and appropriate tidal volume. This chapter discusses the currently available monitoring devices used during stabilization/resuscitation in the delivery room.

Efficacy of Polyethylene Skin Wrapping in Preventing Hypothermia in Preterm Neonates (<34 Weeks): A Parallel Group Non-blinded Randomized Control Trial

OBJECTIVE

The objective of this study was to determine the efficacy of polyethylene skin wrapping on thermoregulation in preterm neonates.

METHODS

Total 151 neonates were enrolled in this randomized control trial. In the control group, neonates were transferred to the radiant warmer and covered with warm cloth after initial care. In the study group, neonates were transferred to the radiant warmer and placed in a food-grade polyethylene bag for 1 h. Axillary temperature of all neonates was recorded for first 24 h at frequent time intervals.

RESULTS

Mean temperature reached to normal range earlier and remained significantly higher in the study group for most time intervals, and this difference persisted even at 24 h. Significantly less number of preterm newborns suffered from hypothermia in the study group as compared with the control group [50 (67.6%) vs. 67 (87%), p = 0.004].

CONCLUSIONS

Polyethylene wraps achieved rapid, sustained thermal control and were effective in preventing hypothermia in preterm newborns.

Maintaining normothermia: Why and how?

A high incidence of postnatal hypothermia has been reported in high-as well low-resource countries and it remains an independent predictor of neonatal morbidity and mortality, especially in very preterm infants in all settings. The temperature of newly born infants should be maintained between 36.5 and 37.5 °C after birth through admission and stabilization. Interventions to achieve this may include environmental temperature 23-25 °C, use of radiant warmers, exothermic mattresses, woollen or plastic caps, plastic wraps, humidified and heated gases. Skin-to-skin contact has been used, especially in low-resource settings. The combinations of these interventions applied to quality improvement initiatives, including staff training, use of checklists, and continuous feedback with the staff involved in the management of the neonate, are key factors to prevent heat loss from delivery room to admission to the neonatal intensive care unit. The admission temperature should be recorded as a predictor of outcomes as well as a quality indicator.

The impact of a quality improvement effort in reducing admission hypothermia in preterm infants following delivery

PURPOSE

Hypothermia at admission is associated with increased mortality and morbidity in preterm infants. We performed a quality improvement (QI) effort to determine the impact of a decrease in admission hypothermia in preterm infants.

METHODS

The study enrolled very low birth weight (VLBW) infants born at Gangnam Severance Hospital between January 2013 and December 2016. This multidisciplinary QI effort included the use of occlusive wraps, warm blankets, and caps; the delivery room temperature was maintained above 23.0˚C, and a check-list was used for feedback.

RESULTS

Among 259 preterm infants, the incidence of hypothermia (defined as body temperature <36.0˚C) decreased significantly from 68% to 41%, and the mean body temperature on neonatal intensive care unit admission increased significantly from 35.5˚C to 36.0˚C. In subgroup analysis of VLBW infants, admission hypothermia and neonatal outcomes were compared between the pre-QI (n=55) and post-QI groups (n=75). Body temperature on admission increased significantly from 35.4˚C to 35.9˚C and the number of infants with hypothermia decreased significantly from 71% to 45%. There were no cases of neonatal hyperthermia. The incidence of pulmonary hemorrhage was significantly decreased (P=0.017). Interaction analysis showed that birth weight and gestational age were not correlated with hypothermia following implementation of the protocol.

CONCLUSION

Our study demonstrated a significant reduction in admission hypothermia following the introduction of a standardized protocol in our QI effort. This resulted in an effective reduction in the incidence of massive pulmonary hemorrhage.

Association of admission temperature and death or adverse neurodevelopmental outcomes in extremely low-gestational age neonates

OBJECTIVE

Preterm infants are at higher risk of developing hypothermia and complications from cold stress, resulting in high mortality and short-term morbidity. Our objective is to evaluate the association between admission temperatures of extremely low-gestational age neonates (ELGAN) (<29 weeks') and adverse short-term neurodevelopmental outcomes.

STUDY DESIGN

In this retrospective study, we included ELGAN admitted to NICUs across Canada between April 2009 and September 2011, who underwent neurodevelopmental assessment at 18-21 months' corrected age.

RESULTS

Of 2739 infants with a complete data set identified during the study period, 968 (35.3%) had admission temperatures ≤36.4 °C (hypothermia group), 1489 (54.5%) had temperature of 36.5-37.2 °C (normothermia group), and 282 (10.3%) had hyperthermia (≥37.3 °C). Their mean birth weight was 823 ± 230 g, 944 ± 227 g and 927 ± 223 g, respectively (p < 0.01). More than 50% of infants born at 23-24 weeks were in the hypothermic group compared to 28.5-36.1% at higher gestational ages. We found 39.5% of infants in the hypothermic group had primary composite outcome of death or severe neurodevelopmental impairment (sNDI). Multivariate logistic regression revealed an increased adjusted odd of primary composite outcome (OR = 1.32; 95% CI = [1.05, 1.66]) in the hypothermic group, compared to infants with normothermia on admission.

CONCLUSIONS

In our cohort of ELGAN, hypothermia on admission was associated with increased risk of death or sNDI.

Cohort study from 11 European countries highlighted differences in the use and efficacy of hypothermia prevention strategies after very preterm birth

AIM

This study investigated the different strategies used in 11 European countries to prevent hypothermia, which continues to affect a large proportion of preterm births in the region.

METHODS

We examined the association between the reported use of hypothermia prevention strategies in delivery rooms and body temperatures on admission to neonatal intensive care units (NICUs) in 5861 infants born at 22 + 0 to 31 +6 weeks of gestation. The use of plastic bags, wraps, caps, exothermic heat and mattresses was investigated.

RESULTS

The proportion of infants born in units that systematically used one or more hypothermia prevention strategies was 88.2% and 50.9% of those infants were hypothermic on admission to NICUs. Of the 9.6% born in units without systematic hypothermia prevention, 73.2% were hypothermic. Only 2.2% of infants were born in units with no reported prevention strategies. Lower gestational age increased the probability of hypothermia. No significant differences were found between the various hypothermia prevention strategies. Hyperthermia was seen in 4.8% of all admitted infants.

CONCLUSION

Very preterm infants had lower risks of hypothermia on NICU admission if the unit used systematic prevention strategies. All the strategies had similar effects, possibly due to implementation rather than a strategy's specific efficacy.

Surgery and magnetic resonance imaging increase the risk of hypothermia in infants

AIM

Maintaining normothermia is a tenet of neonatal care. However, neonatal thermal care guidelines applicable to intra-hospital transport beyond the neonatal intensive care unit (NICU) and during surgery or magnetic resonance imaging (MRI) are lacking. The aim of this study is to determine the proportion of infants normothermic (36.5-37.5°C) on return to NICU after management during surgery and MRI, and during standard clinical care in both environments.

METHODS

Sixty-two newborns requiring either surgery in the operating theatre (OT) (n = 41) or an MRI scan (n = 21) at the Royal Children's Hospital (Melbourne) NICU were prospectively studied. Core temperature, along with cardiorespiratory parameters, was continuously measured from 15 min prior to leaving the NICU until 60 min after returning. Passive and active warming (intra-operatively) was at clinician discretion.

RESULTS

The study reported 90% of infants were normothermic before leaving NICU: 86% (MRI) and 93% (OT). Only 52% of infants were normothermic on return to NICU (relative risk (RR) 1.75; 95% confidence interval (CI) 1.39-2.31; number needed to harm (NNH) 2.6). Between departure from the NICU and commencement of surgery, core temperature decreased by mean 0.81°C (95% CI 0.30-1.33; P = 0.0001, analysis of variance), with only 24% of infants normothermic when surgery began (P < 0.0001; RR 3.80 (95% CI 2.33-6.74); NNH 1.5). After an MRI, infants were a mean 0.41°C (95% CI 0.16-0.67) colder than immediately before entering the scanner (P = 0.001, analysis of variance), with only 43% being normothermic (P = 0.003; RR 2.11 (95% CI 1.35-3.74); NNH 2.1).

CONCLUSION

Unintentional hypothermia is a common occurrence during surgery in the OT and MRI in neonates, indicating that evidence-based warming strategies to prevent hypothermia should be developed.

Physical stimulation of newborn infants in the delivery room

OBJECTIVE

Neonatal resuscitation guidelines recommend that newborn infants are stimulated to assist with the establishment of regular respirations. The mode, site of application and frequency of stimulations are not stipulated in these guidelines. The effectiveness of stimulation in improving neonatal transition outcomes is poorly described.

METHODS

We conducted a retrospective review of video recordings of neonatal resuscitation at a tertiary perinatal centre. Four different types of stimulation (drying, chest rub, back rub and foot flick) were defined a priori and the frequency and infant response were documented.

RESULTS

A total of 120 video recordings were reviewed. Seventy-five (63%) infants received at least one episode of stimulation and 70 (58%) infants were stimulated within the first minute after birth. Stimulation was less commonly provided to infants <30 weeks' gestation (median (IQR) number of stimulations: 0 (0-1)) than infants born ≥30 weeks' gestation (1 (1-3); p<0.001). The most common response to stimulation was limb movement followed by infant cry and facial grimace. Truncal stimulation (drying, chest rub, back rub) was associated with more crying and movement than foot flicks.

CONCLUSION

Less mature infants are stimulated less frequently compared with more mature infants and many very preterm infants do not receive any stimulation. Most infants were stimulated within the first minute as recommended in resuscitation guidelines. Rubbing the trunk may be most effective but this needs to be confirmed in prospective studies.

Admission Temperature and Associated Mortality and Morbidity among Moderately and Extremely Preterm Infants

OBJECTIVE

To evaluate the temperature distribution among moderately preterm (MPT, 29-33 weeks) and extremely preterm (EPT, <29 weeks) infants upon neonatal intensive care unit (NICU) admission in 2012-2013, the change in admission temperature distribution for EPT infants between 2002-2003 and 2012-2013, and associations between admission temperature and mortality and morbidity for both MPT and EPT infants.

STUDY DESIGN

Prospectively collected data from 18 centers in the Eunice Kennedy Shriver National Institute of Child Health and Human Development Neonatal Research Network were used to examine NICU admission temperature of inborn MPT and EPT infants. Associations between admission temperature and mortality and morbidity were determined by multivariable logistic regression. EPT infants from 2002-2003 and 2012-2013 were compared.

RESULTS

MPT and EPT cohorts consisted of 5818 and 3213 infants, respectively. The distribution of admission temperatures differed between the MPT vs EPT (P < .01), including the percentage <36.5°C (38.6% vs 40.9%), 36.5°C-37.5°C (57.3% vs 52.9%), and >37.5°C (4.2% vs 6.2%). For EPT infants in 2012-2013 compared with 2002-2003, the percentage of temperatures between 36.5°C and 37.5°C more than doubled and the percentage of temperatures >37.5°C more than tripled. Admission temperature was inversely associated with in-hospital mortality.

CONCLUSIONS

Low and high admission temperatures are more frequent among EPT than MPT infants. Compared with a decade earlier, fewer EPT infants experience low admission temperatures but more have elevated temperatures. In spite of a change in distribution of NICU admission temperature, an inverse association between temperature and mortality risk persists.

Golden 60 minutes of newborn's life: Part 1: Preterm neonate

"Golden 60 minutes "or "Golden Hour" is defined as the first hour of the newborn after birth. This hour includes resuscitation care, transport to nursery from place of birth and course in nursery. The concept of "Golden hour" includes evidence based interventions that are done in the first 60 min of postnatal life for the better long term outcome of the preterm newborn especially extreme premature, extreme low birth weight and very low birth weight. The evidence shows that the concept of "Golden 60 minutes" leads to reduction in neonatal complications like hypothermia, hypoglycemia, intraventricular hemorrhage, chronic lung disease and retinopathy of prematurity. In this review, we have covered various interventions included in "Golden hour" for preterm newborn namely delayed cord clamping, prevention of hypothermia, respiratory and cardiovascular system support, prevention of sepsis, nutritional support and communication with family.

First Golden Hour of Life: A Quality Improvement Initiative

BACKGROUND

Very low birth-weight (<1500 g) infants are vulnerable to their environment during the first hour after birth. We designed an evidence-based golden hour protocol (GHP) with a goal to stabilize and perform admission procedures within 1 hour of birth at a level IIIB neonatal intensive care unit (NICU).

PURPOSE

The aim of this quality improvement project was to ascertain whether an evidence-based GHP would improve care efficiency and short-term outcomes.

METHODS

Rapid cycles of change using Plan Do Study Act were utilized to document progress and gain knowledge during the quality improvement project. Measures were plotted with statistical process control methods (SPC), which analyzed improvement over time.

RESULTS

Both admission temperature and glucose-level means were within reference range throughout the project and predicted a stable process. We observed significantly decreased time to initiation of intravenous fluids and antibiotics. An upward trend of surfactant administration within the first 2 hours of life was also observed.

IMPLICATIONS FOR PRACTICE

The use of a GHP provided an organized approach to admission procedures and care. By using a checklist and recording intervention times, NICU caregivers were more aware of time management for each intervention and were able to decrease time to initiation of intravenous fluids and antibiotics.

IMPLICATIONS FOR RESEARCH

Future research should focus on establishing normal blood pressure ranges and safe pain management during the "golden hour" and beyond. Future quality improvement should focus on improving subsequent temperature and blood glucose levels after admission umbilical artery and venous catheter placement.

Resuscitation of extremely preterm infants - controversies and current evidence

Despite significant advances in perinatal medicine, the management of extremely preterm infants in the delivery room remains a challenge. There is an increasing evidence for improved outcomes regarding the resuscitation and stabilisation of extremely preterm infants but there is a lack of evidence in the periviable (gestational age 23-25 wk) preterm subgroup. Presence of an experienced team during the delivery of extremely preterm infant to improve outcome is reviewed. Adaptation from foetal to neonatal cardiorespiratory haemodynamics is dependent on establishing an optimal functional residual capacity in the extremely preterm infants, thus enabling adequate gas exchange. There is sufficient evidence for a gentle approach to stabilisation of these fragile infants in the delivery room. Evidence for antenatal steroids especially in the periviable infants, delayed cord clamping, strategies to establish optimal functional residual capacity, importance of temperature control and oxygenation in delivery room in extremely premature infants is reviewed in this article.

The effect of coverings, including plastic bags and wraps, on mortality and morbidity in preterm and full-term neonates

Neonatal hypothermia is an important risk factor for mortality and morbidity, and is common even in temperate climates. We conducted a systematic review to determine whether plastic coverings, used immediately following delivery, were effective in reducing the incidence of mortality, hypothermia and morbidity. A total of 26 studies (2271 preterm and 1003 term neonates) were included. Meta-analyses were conducted as appropriate. Plastic wraps were associated with a reduction in hypothermia in preterm (⩽29 weeks; risk ratio (RR)=0.57; 95% confidence interval (CI) 0.46 to 0.71) and term neonates (RR=0.76; 95% CI 0.60 to 0.96). No significant reduction in neonatal mortality or morbidity was found; however, the studies were underpowered for these outcomes. For neonates, especially preterm, plastic wraps combined with other environmental heat sources are effective in reducing hypothermia during stabilization and transfer within hospital. Further research is needed to quantify the effects on mortality or morbidity, and investigate the use of plastic coverings outside hospital settings or without additional heat sources.

Predictors of unfavorable thermal outcome during newborn emergency retrievals

OBJECTIVE

Maintenance of normal body temperature is a challenge during transports. We aimed to identify predisposing factors for unfavorable thermal outcome during emergency retrievals of neonates.

METHODS

Demographic data and clinical variables for transports performed over a 2-year period were extracted from the Newborn Emergency Transport Service (Victoria, Australia) database. Arrival temperatures outside normothermia (36.5°-37.5°C) were defined as an unfavorable outcome.

RESULTS

Normothermia on arrival at the receiving hospital was achieved in 78% of 1,261 transports. The strongest predictor of unfavorable thermal outcome was an abnormal temperature at the start of the retrieval (odds ratio [OR] = 8.04; 95% confidence interval [CI], 5.91-10.95; P < .001) followed by very low weight on transport (< 1,500 g; OR = 2.49; 95% CI, 1.63-3.80; P < .001) and respiratory support (OR = 1.81; 95% CI, 1.29-2.54; P = .001). Medications (eg, inotropes and sedation/muscle relaxation) or central/peripheral venous/arterial lines were not significant predictors of outcome when temperature at retrieval start, weight at transport, and respiratory support were adjusted as cofactors. Mode of transport (road, fixed wing, or rotary wing aircraft) and outside temperature were not associated with thermal outcome.

CONCLUSION

Abnormal temperature at the start of the retrieval, very low transport weight, and respiratory support were strong predictors of unfavorable thermal outcome during neonatal emergency transports.

Total body polyethylene wraps for preventing hypothermia in preterm infants: a randomized trial

OBJECTIVE

To evaluate whether a polyethylene total body wrapping (covering both the body and head) is more effective than conventional treatment (covering up to the shoulders) in reducing perinatal thermal losses in very preterm infants.

STUDY DESIGN

This was a multicenter, prospective, randomized, parallel 1:1, unblinded, controlled trial of infants<29 weeks' gestation age, comprising two study groups: experimental group (total body group; both the body and head covered with a polyethylene occlusive bag, with the face uncovered) and control group (only the body, up to the shoulders, covered with a polyethylene occlusive bag). The primary outcome was axillary temperature on neonatal intensive care unit admission immediately after wrap removal.

RESULTS

One hundred randomly allocated infants (50 in the total body group and 50 controls) completed the study. Mean axillary temperature on neonatal intensive care unit admission was similar in the two groups (36.5±0.6°C total body vs 36.4±0.8°C controls; P=.53). The rate of moderate hypothermia (temperature<36°C) was 12% in the total body group and 20% in the control group (P=.41). Three subjects in each group (6.0%) had an axillary temperature>37.5°C on admission, and one subject in control group had an axillary temperature>38°C.

CONCLUSION

Total body wrapping is comparable with covering the body up to the shoulders in preventing postnatal thermal losses in very preterm infants.

Controversies in neonatal resuscitation

Despite recent advances in perinatal medicine and in the art of neonatal resuscitation, resuscitation strategy and treatment methods in the delivery room should be individualized depending on the unique characteristics of the neonate. The constantly increasing evidence has resulted in significant treatment controversies, which need to be resolved with further clinical and experimental research.

Reducing hypothermia in preterm infants following delivery

BACKGROUND

Moderate hypothermia (temperature <36°C) at birth is common in premature infants and is associated with increased mortality and morbidity.

METHODS

A multidisciplinary practice plan was implemented to determine in premature infants <35 weeks old whether a multifaceted approach would reduce the number of inborn infants with an admitting axillary temperature <36°C by 20% without increasing exposure to a temperature >37.5°C. The plan included use of occlusive wrap a transwarmer mattress and cap for all infants and maintaining an operating room temperature between 21°C and 23°C. Data were obtained at baseline (n = 66), during phasing in (n = 102), and at full implementation (n = 193).

RESULTS

Infant axillary temperature in the delivery room (DR) increased from 36.1°C ± 0.6°C to 36.2°C ± 0.6°C to 36.6°C ± 0.6°C (P < .001), and admitting temperature increased from 36.0°C ± 0.8°C to 36.3°C ± 0.6°C to 36.7°C ± 0.5°C at baseline, phasing in, and full implementation, respectively (P < .001). The number of infants with temperature <36°C decreased from 55% to 6.2% at baseline versus full implementation (P < .001), and intubation at 24 hours decreased from 39% to 17.6% (P = .005). There was no increase in the number of infants with a temperature >37.5°C over time. The use of occlusive wrap, mattress, and cap increased from 33% to 88% at baseline versus full implementation. Control charts showed significant improvement in DR ambient temperature at baseline versus full implementation.

CONCLUSIONS

The practice plan was associated with a significant increase in DR and admitting axillary infant temperatures and a corresponding decrease in the number of infants with moderate hypothermia. There was an associated reduction in intubation at 24 hours. These positive findings reflect increased compliance with the practice plan.

Current Neonatal Resuscitation Practices among Paediatricians in Gujarat, India

Aim. We assessed neonatal resuscitation practices among paediatricians in Gujarat. Methods. Cross-sectional survey of 23 questions based on guidelines of Neonatal Resuscitation Program (NRP) and Navjaat Shishu Suraksha Karyakram (NSSK) was conducted using web-based tool. Questionnaire was developed and consensually validated by three neonatologists. Results. Total of 142 (21.2%) of 669 paediatricians of Gujarat, India, whose e-mail addresses were available, attempted the survey and, from them, 126 were eligible. Of these, 74 (58.7%) were trained in neonatal resuscitation. Neonatal Intensive Care Unit with mechanical ventilation facilities was available for 54% of respondents. Eighty-eight (69.8%) reported correct knowledge and practice regarding effective bag and mask ventilation (BMV) and chest compressions. Knowledge and practice about continuous positive airway pressure use in delivery room were reported in 18.3% and 30.2% reported use of room air for BMV during resuscitation. Suctioning oral cavity before delivery in meconium stained liquor was reported by 27.8% and 38.1% cut the cord after a minute of birth. Paediatricians with NRP training used appropriate method of tracheal suction in cases of nonvigorous newborns than those who were not trained. Conclusions. Contemporary knowledge about neonatal resuscitative practices in paediatricians is lacking and requires improvement. Web-based tools provided low response in this survey.

Initial resuscitation and stabilization of the periviable neonate: the Golden-Hour approach

There is a paucity of data to support recommendations for stabilization and resuscitation of the periviable neonate in the delivery room. The importance of delivery at a tertiary center with adequate experience, resuscitation team composition, and training for a periviable birth is reviewed. Evidence for delayed cord clamping, delivery room temperature stabilization, strategies to establish functional residual capacity, and adequate ventilation as well as oxygen use in the delivery room is generally based on expert consensus, physiologic plausibility, as well as data from slightly more mature extremely low gestational-age neonates. Little is known about optimal care in the delivery room of these most fragile infants, and thus the need for research remains critical.