Is breastfeeding really favoring early neonatal jaundice?

Newborn Weight Loss Tool and Readmission for Hyperbilirubinemia

OBJECTIVE

The aim of this study was to determine if the Newborn Weight Loss Tool (NEWT) can predict hospital readmission due to hyperbilirubinemia.

STUDY DESIGN

This is a case-control study of 93 newborns and 186 controls ≥35 weeks' gestation. All were discharged from the Mother-Baby unit of an urban academic center and subsequently readmitted for hyperbilirubinemia. Controls were matched for date of birth, gestational age, and Bhutani risk zone. All infants were screened for hyperbilirubinemia prior to discharge and managed according to American Academy of Pediatrics guidelines in place at the time. Chi-square, Fisher's exact test, and multivariate analysis were utilized as appropriate.

RESULTS

There was no significant difference between the groups for a NEWT < 50% at discharge. More cases than controls breastfed. A significantly greater percentage of cases had NEWT > 50% at readmission than discharge. NEWT > 90% was moderately associated with readmission for hyperbilirubinemia (p = 0.081).

CONCLUSION

NEWT provides a more nuanced assessment of weight loss following birth and can aid in highlighting newborns at risk for readmission due to hyperbilirubinemia.

KEY POINTS

· Weight loss is a risk factor for readmission after birth.. · NEWT is a more nuanced assessment of weight loss.. · NEWT > 90% is associated with readmission for jaundice..

The correlation between serum total bile acid and alanine aminotransferase of pregnant women and the disorders of neonatal hyperbilirubinemia-related amino acid metabolism

BACKGROUND

To explore the association between liver metabolism-related indicators in maternal serum and neonatal hyperbilirubinemia (NHB), and further investigate the predictive value of these indicators in NHB-related amino acid metabolism disorders.

METHODS

51 NHB and 182 No-NHB newborns and their mothers who treated in the Fourth Hospital of Shijiazhuang from 2018 to 2022 were participated in the study. The differences in clinical data were compared by the Mann-Whitney U test and Chi-square test. Multivariate logistic regression was used to analyze the relationship between maternal serum indicators and the occurrence of NHB. The correlation analysis and risk factor assessment of maternal serum indicators with NHB-related amino acid metabolic disorders were performed using Spearman correlation analysis and multivariate logistic regression.

RESULTS

Compared to the non NHB group, the NHB group had higher maternal serum levels of alanine aminotransferase (ALT), aspartate aminotransferase (AST), ALT/AST, and total bile acid (TBA), while lower levels of serum albumin (ALB), total cholesterol (TC) and high-density lipoprotein (HDL). The levels of alanine (ALA), valine (VAL), ornithine (ORN), and proline (PRO) in the newborns were reduced in NHB group, while arginine (ARG) showed a tendency to be elevated. Multiple logistic regression analysis showed that maternal ALT, AST, ALT/AST, and TBA levels were all at higher risk with the development of NHB, whereas ALB, TC, and HDL levels were negatively associated with NHB development. Increasing maternal TBA level was associated with lower ALA (r=-0.167, p = 0.011), VAL (r=-0.214, p = 0.001), ORN (r=-0.196, p = 0.003), and PRO in the newborns (r=-0.131, p = 0.045). Maternal ALT level was negatively associated with ALA (r=-0.135, p = 0.039), VAL (r=-0.177, p = 0.007), ORN (r=-0.257, p < 0.001), while ALT/AST was positively correlated with ARG (r = 0.133, p = 0.013). After adjustment for confounding factors, maternal serum TBA and ALT were the independent risk factor for neonatal ORN metabolic disorders [(adjusted odds ratio (AOR) = 0.379, 95%CI = 0.188-0.762, p = 0.006), (AOR = 0.441, 95%CI = 0.211-0.922, p = 0.030)]. Maternal ALT level was an independent risk factor for neonatal VAL metabolic disorders (AOR = 0.454, 95%CI = 0.218-0.949, p = 0.036).

CONCLUSIONS

The levels of high TBA, ALT, AST, and low HDL, TC of maternal were associated with the risk of NHB. Maternal TBA and ALT levels were independent risk factors for NHB-related amino acid disturbances which have value as predictive makers.

Association between hepatitis B virus replication during pregnancy and perinatal outcomes: a retrospective cohort study

BACKGROUND

The effect of hepatitis B virus (HBV) replication during pregnancy on the outcomes of pregnancies remains to be elucidated.

OBJECTIVES

This study aimed to investigate the association between HBV replication and adverse maternal and infant outcomes.

METHODS

We retrospectively analysed the clinical data of 836 pregnant inpatients with hepatitis B surface antigen positivity who delivered at two provincial tertiary grade A hospitals in the Fujian province between June 2016 and October 2020.

RESULTS

The incidence of intrahepatic cholestasis of pregnancy, hypertensive syndrome complicating pregnancy, gestational diabetes mellitus, preterm birth, macrosomia, growth restriction, and vaginal infections did not differ in the HBV replication and non-replication groups (p > 0.05); however, the rates of caesarean section (p = 0.017; OR, 1.423; 95% CI, 1.065-1.902) and neonatal jaundice (p < 0.001; OR, 2.361; 95% CI, 1.498-3.721) were higher in the replication group than that in the non-replication group. After using propensity score analysis to adjust for alanine transaminase and aspartate aminotransferase levels in both groups, the replication group was still found to have an increased risk for caesarean section (p < 0.001; OR, 2.367; 95% CI, 1.668-3.359) and their infants had higher rates of neonatal jaundice (p < 0.001; OR, 12.605; 95% CI, 4.456-35.656).

CONCLUSIONS

Our findings contribute to a better understanding of the association between maternal HBV replication status and perinatal outcomes. Pregnant women with HBV replication face an increased risk of caesarean section, and their infants appear to have a higher risk for neonatal jaundice.

Early-Term Neonates Demonstrate a Higher Likelihood of Requiring Phototherapy Compared to Those Born Full-Term

Early-term neonates (with a gestational age (GA) of 37 and 0/7 weeks to 38 and 6/7 weeks) face higher morbidities, including respiratory and neurodevelopmental issues, than full-term (39 and 0/7 weeks to 40 and 6/7 weeks) infants. This study explores whether hyperbilirubinemia necessitating phototherapy also differs between these groups. A retrospective study was conducted on neonates born from January 2021-June 2022, excluding those with specific conditions. Evaluated factors included GA, birth weight, bilirubin levels, glucose-6-phosphate dehydrogenase (G6PD) deficiency, and feeding type, with phototherapy given as per AAP guidelines. Of 1085 neonates, 356 met the criteria. When stratifying the neonates based on the need for phototherapy, a higher proportion of early-term neonates required phototherapy compared to full-term (p < 0.05). After factoring in various risks (GA; birth weight; gender; feeding type; G6PD deficiency; transcutaneous bilirubin levels at 24 h and 24-48 h postpartum; maternal diabetes; and the presence of caput succedaneum or cephalohematoma), early-term neonates were more likely to need phototherapy than full-term babies (OR: 2.15, 95% CI: 1.21 to 3.80). The optimal cut-off for transcutaneous bilirubin levels 24-48 h postpartum that were used to predict phototherapy need was 9.85 mg/dl. In conclusion, early-term neonates are at a greater risk for developing jaundice and requiring phototherapy than full-term neonates. Monitoring bilirubin 24-48 h postpartum enhances early prediction and intervention.

An evaluation of ursodeoxycholic acid treatment in prolonged unconjugated hyperbilirubinemia due to breast milk

Background/Aim

Prolonged jaundice is one of the most common problems during neonatal period. The aim of this study was to evaluate the efficiency of ursodeoxycholic acid (UDCA) treatment in newborn infants with prolonged unconjugated hyperbilirubinemia.

Materials and Methods

The present study included 27 patients who were fed by breast milk and followed up in the outpatient clinic due to prolonged jaundice without any underlying etiological factor; 10 mg/kg/day UDCA was administrated in two doses for 7 days. Furthermore, 20 newborns diagnosed with prolonged jaundice with same characteristics were enrolled as the control group. The control group was also given a placebo; demographic characteristics, liver functions tests before and after the treatment, bilirubin decrease rates, and hemogram parameters of groups were compared.

Results

Total bilirubin levels in the study and control groups before the treatment were 16.02 ± 1.41 mg/dL and 15.93 ± 1.66 mg/dL, respectively (P = 0.84). Total bilirubin levels in the study and control groups at day 7 after UDCA treatment were detected 8.18 ± 2.31 mg/dL and 13.92 ± 2.66 mg/dL, respectively (P < 0.001), and at day 14 after the treatment were 5.45 ± 2.59 mg/dL and 11.91 ± 2.83 mg/dL, respectively (P < 0.001). Furthermore, serum aspartate aminotransferase (AST) was detected <21 U/L in the ROC analysis after UDCA treatment (P = 0.04).

Conclusion

The study outcomes indicated that an efficient reduction in total bilirubin levels may be achieved, and outpatient clinic follow-up period may be reduced in patients whom UDCA was administrated. Moreover, it may be speculated that AST can be used to evaluate the efficacy after treatment. However, studies with larger sample sizes are needed for the routine use of UDCA in the treatment of prolonged jaundice.

Intermittent phototherapy versus continuous phototherapy for neonatal jaundice

BACKGROUND

Phototherapy is a widely accepted, effective first-line therapy for neonatal jaundice. It is traditionally used continuously but intermittent phototherapy has been proposed as an equally effective alternative with practical advantages of improved maternal feeding and bonding. The effectiveness of intermittent phototherapy compared with continuous phototherapy is unknown.

OBJECTIVES

To assess the safety and effectiveness of intermittent phototherapy compared with continuous phototherapy.

SEARCH METHODS

Searches were conducted on 31 January 2022 in the following databases: CENTRAL via CRS Web, MEDLINE and Embase via Ovid. We also searched clinical trials databases and the reference lists of retrieved articles for randomised controlled trials (RCTs) and quasi-randomised trials.

SELECTION CRITERIA

We included RCTs, cluster-RCTs and quasi-RCTs comparing intermittent phototherapy with continuous phototherapy in jaundiced infants (both term and preterm) up to the age of 30 days. We compared intermittent phototherapy with continuous phototherapy by any method and at any dose and duration as defined by the authors.

DATA COLLECTION AND ANALYSIS

Three review authors independently selected trials, assessed trial quality and extracted data from included studies. We performed fixed-effect analyses and expressed treatment effects as mean difference (MD), risk ratio (RR) and risk difference (RD) with 95% confidence intervals (CIs). Our primary outcomes of interest were rate of decline of serum bilirubin, and kernicterus. We used the GRADE approach to assess the certainty of evidence.

MAIN RESULTS

We included 12 RCTs (1600 infants) in the review. There is one ongoing study and four awaiting classification. There was little or no difference between intermittent phototherapy and continuous phototherapy with respect to rate of decline of bilirubin in jaundiced newborn infants (MD -0.09 micromol/L/hr, 95% CI -0.21 to 0.03; I² = 61%; 10 studies; 1225 infants; low-certainty evidence). One study involving 60 infants reported no incidence of bilirubin induced brain dysfunction (BIND). It is uncertain whether either intermittent or continuous phototherapy reduces BIND because the certainty of this evidence is very low. There was little or no difference in treatment failure (RD 0.03, 95% CI 0.08 to 0.15; RR 1.63, 95% CI 0.29 to 9.17; 1 study; 75 infants; very low-certainty evidence) or infant mortality (RD -0.01, 95% CI -0.03 to 0.01; RR 0.69, 95% CI 0.37 to 1.31 I² = 0%; 10 studies, 1470 infants; low-certainty evidence).  AUTHORS' CONCLUSIONS: The available evidence detected little or no difference between intermittent and continuous phototherapy with respect to rate of decline of bilirubin. Continuous phototherapy appears to be more effective in preterm infants, however, the risks of continuous phototherapy and the potential benefits of a slightly lower bilirubin level are unknown. Intermittent phototherapy is associated with a decrease in the total number of hours of phototherapy exposure. There are theoretical benefits to intermittent regimens but there are important safety outcomes that were inadequately addressed. Large, well designed, prospective trials are needed in both preterm and term infants before it can be concluded that intermittent and continuous phototherapy regimens are equally effective.

Animal Kernicterus Models: Progress and Challenges

Kernicterus is a leading cause of neonatal death throughout the world, especially in low-middle-income countries. It is developed by an unconjugated hyperbilirubinemia in the blood and brain tissue, triggering pathological processes that spawn neurotoxicity and neurodegeneration. However, the biological mechanism (s) of bilirubin-induced neurotoxicity and Kernicterus development remain to be well elucidated. Likewise, a practical therapeutic approach for human Kernicterus has yet to be found. Undoubtedly, animal models of Kernicterus can be helpful in the identification of underlying biological processes of hyperbilirubinemia evolution to Kernicterus, as well as the evaluation of various treatments efficacy in preclinical studies. More importantly, establishing an animal model that can mimic the Kernicterus and its behavioral, neuro-histological, and hematological manifestations is a severe priority in preclinical studies. So far, several Kernicterus animal models have been established that could partially mimic one or more clinical and paraclinical signs of human Kernicterus. The present study aimed to review all methods modeling Kernicterus with a focus on their potentials and shortcomings and subsequently provide the optimal methods for an ideal Kernicterus animal model.

Effect of Early Supplemental Formula Intervention on Body Weight and Hyperbilirubinemia in Neonates During 72 h After Birth

Background: The full breastfeeding may lead to insufficient milk intake of newborns and increase the rate of body weight loss (BWL). Severe BWL was generally believed as a cause of significant hyperbilirubinemia in newborn babies. The study aimed to investigate the effect if early supplemental feeding in newborns with birth weight loss at the first 3 days after birth could decrease the rate of hyperbilirubinemia 72 h of birth. Methods: A total of 395 neonates with gestational age >37 weeks and birth body weight >2500g were prospectively collected between 2016 and 2018. We analyzed 280 neonates with BWL rate reaching the predictive value (4.5%, 7.5%, and 8% on the first, second, third day after birth, respectively) for subsequent hyperbilirubinemia after 72 hours after birth. The enrolled cases were divided into four subgroups as interventional consecutive milk supplement for 0, 1, 2, and 3 days after birth for further analysis Results: For newborns with BWL reaching the predictive value on the first day after birth, the serum bilirubin levels were lower in the experimental group than those in the non-involved control group (p < 0.05). For newborns with three consecutive days of interventional milk supplementation, the serum bilirubin levels at the 72 h after birth showed the lowest levels compared with the other sub-groups with two consecutive days and one consecutive day of interventional milk supplementation (p < 0.05). Moreover, there was a significantly decreasing trend in the consecutive days of interventional milk supplementation (p < 0.05). Conclusion: Newborns with BWL over 4.5% on the first day after birth receiving early intervention milk supplementation could significantly reduce serum bilirubin levels at the 72 h after birth. The more days of consecutive milk supplementation after birth may lead to the lower the 72 h serum bilirubin levels. It is recommended to early and consecutive milk supplementation after birth to be an effective way in reducing serum bilirubin levels.

Breastfeeding in Relation to Neonatal Jaundice in the First Week After Birth: Parents' Perceptions and Clinical Measurements

Background: Parents may consider interrupting breastfeeding to manage neonatal jaundice (NJ). Our aims were to determine correlations of breastfeeding with NJ by examining infants' manifestations in the first week after birth and to understand parents' perceptions toward NJ in relation to breastfeeding. Materials and Methods: This prospective cross-sectional study was conducted in a tertiary medical center by examining infants and administering a questionnaire survey to their parents. All healthy infants admitted to the well-baby nursery were eligible for enrollment. A 16-item questionnaire was distributed to parents of enrolled infants from October 2017 to February 2019. Items of the questionnaire included perceptions and knowledge of NJ. In addition, clinical information of enrolled infants was obtained from medical records. Hyperbilirubinemia was defined as a peak transcutaneous bilirubinometer value ≥15 mg/dL. Results: In total, 449 parents completed the consent form and participated in the study. Results showed that exclusive breastfeeding was more common in infants with a vaginal delivery (p < 0.001), who were nonprimiparous (p = 0.004) and who had weight loss of >7% (p < 0.001). There was no significant correlation of exclusive breastfeeding with hyperbilirubinemia (p = 0.414). Approximately two-thirds of parents were worried about NJ occurring in their child. Most parents were aware of phototherapy as management of NJ. However, their knowledge of risk factors, complications, and assessments of NJ was relatively deficient. Overall, 29.6% of parents rated breastfeeding as a risk factor for NJ, and 24% of parents indicated that cessation of breastfeeding was a management option for NJ. Conclusions: The results indicated that NJ in the first few days after birth poses a significant barrier to breastfeeding. Our findings provide critical information for plotting strategies to enhance parents' willingness to continue breastfeeding.

Neonatal Jaundice: Perception of Pregnant Women Attending Antenatal Clinic at a Tertiary Hospital in Southwest, Nigeria

Background: Severe neonatal jaundice (NNJ) remains a leading cause of preventable brain damage, mental handicap, physical disabilities, and early death among infants. Methods: Using a descriptive cross-sectional study design, information was gathered using a structured, pretested questionnaire from 518 pregnant women who attended the antenatal clinic at a tertiary Hospital in Southwest Nigeria. Results: Most (77%) of the respondents have heard about NNJ prior the survey. Most respondents (69.5%) demonstrated poor knowledge of the causes of NNJ. The majority, 98.4% had good attitude toward treatment of NNJ. Most respondents (72.1%) demonstrated poor knowledge of the correct treatment of NNJ. A quarter of the respondents knew no danger sign of NNJ. Conclusion: There is serious knowledge gap among the respondents about the causes, treatment, dangers signs and complications of NNJ. There is need for increased awareness campaign using every available means of reaching women of reproductive age group to reduce the consequences of this common neonatal problem.

Baby-Friendly Hospital Initiative Is Associated with Lower Rates of Neonatal Hyperbilirubinemia

Background: The Baby-Friendly Hospital Initiative (BFHI) advances practices that support exclusive breastfeeding. BFHI practices are associated with increased breastfeeding rates, however, other patient outcomes are not well described. This study examined the association of BFHI practices with hyperbilirubinemia and phototherapy between groups of newborns born before and after BFHI implementation at an urban, tertiary academic medical center in South Carolina. Materials and Methods: We conducted a retrospective study of healthy, term newborns born between July and September 2011 (n = 956), before BFHI implementation, and newborns born during the same period in 2013 (n = 1,131) after BFHI implementation. Primary outcomes were neonatal hyperbilirubinemia, phototherapy treatment, and hospital readmissions for hyperbilirubinemia within 30 days of discharge. We compared rates of outcomes between the study groups using unadjusted and adjusted odds ratios (OR). Results: Among newborns born before versus after BFHI implementation, 20.3% versus 6.98% were diagnosed with hyperbilirubinemia (p < 0.001), 5.75% versus 1.95% received phototherapy (p < 0.001), and 0.31% versus 0.35% were readmitted to the hospital for hyperbilirubinemia within 30 days (p = 0.88). In adjusted analyses, newborns born after BFHI implementation were significantly less likely to develop neonatal hyperbilirubinemia (OR 0.28 [95% confidence intervals; CI 0.20-0.37]) and receive phototherapy treatment (OR 0.27 [95% CI 0.15-0.49]) than newborns born before BFHI implementation. Conclusions: Implementation of BFHI practices is associated with significant decreases in neonatal hyperbilirubinemia and phototherapy without affecting readmission rates. Exclusive breastfeeding has traditionally been considered a risk factor for the development of neonatal jaundice. This study demonstrates that BFHI practices may mitigate that risk.

Profiling of UGT1A1*6, UGT1A1*60, UGT1A1*93, and UGT1A1*28 Polymorphisms in Indonesian Neonates With Hyperbilirubinemia Using Multiplex PCR Sequencing

Background: Single nucleotide polymorphism (SNP) variants of the uridine diphosphate glucuronosyltransferase 1A1 (UGT1A1) gene have been studied as an important factor in neonatal hyperbilirubinemia (jaundice) severity. Specific ethnicities, including Asians, have certain SNPs that appear more frequently than others. Aim: To identify the most common SNPs in Indonesian neonates and their association with the severity of neonatal hyperbilirubinemia. Methods: Eighty-eight inborn and outborn jaundiced infants from three different hospitals (Bengkulu, Jakarta, Biak Papua) across Indonesia were enrolled in this cross-sectional study and their peak total serum bilirubin (TSB) levels assessed. SNP variant analyses of the TATAA box, promoter, and exon 1 regions of UGT1A1 gene from 78 of the 88 infants were carried out using the SNaPshot^R Multiplex Polymerase Chain Reaction (PCR) System followed by DNA sequencing. Results: We detected SNP variants UGT1A1 ^* 28, UGT1A1 ^* 60, UGT1A1 ^* 93, and UGT1A1 ^* 6 in our population. Mean total serum bilirubin (TSB) was 14.59 ± 5.57 mg/dL. Bivariate analyses using delivery location, gestational age, birth weight, mother's age, and ethnicity were shown to be associated with moderate-to-severe hyperbilirubinemia (p < 0.05). None of the four SNPs appeared to be associated with moderate-to-severe hyperbilirubinemia. In multivariate analysis, however, only the "other ethnic group" (e.g., Chinese, Bengkulu, Papua, Bima) category showed an association with moderate-to-severe hyperbilirubinemia, with an odds ratio of 6.49 (95% CI 1.01-41.67; p < 0.05). Conclusions: We found that the UGT1A1 ^* 60 is the most common SNP detected in neonates with hyperbilirubinemia in the Indonesian population. Interestingly, in Indonesia, UGT1A1 polymorphisms do not appear to be associated with differences in the severity of hyperbilirubinemia.

[Guidelines for prevention, detection and management of hyperbilirubinaemia in newborns of 35 or more weeks of gestation]

Hyperbilirubinaemia is one of the most frequent causes of hospital readmission during the first week of life. Its detection is still a big challenge, mainly due to the early discharge from the hospital that can be associated with a delay of the diagnosis. The identification of those newborns at risk of developing significant hyperbilirubinaemia is one of the main priorities in the public health care system. An approach to the management of newborn jaundice is presented in this article, following the recommendations based on the medical evidence and on the opinion of the Standards Committee of the Spanish Society of Neonatology.

[Management of jaundice in the newborn≥35 GW: From screening to follow-up after discharge. Guidelines for clinical practice]

Jaundice due to unconjugated bilirubin is an everyday condition in the neonatal period because it results from the adaptation of bilirubin metabolism at this time of life. Hyperbilirubinemia has a potential neurotoxicity and although it most often resolves spontaneously, it can lead to acute and sometimes chronic encephalopathy. The latter condition is called kernicterus and induces severe and irreversible neurological sequelae. This rare complication is still reported in all countries throughout the world even if severe hyperbilirubinemia can be prevented and critical points points of failure in jaundice management are identified. Jaundice management are identified, jaundice is the most frequent symptom during the first days of life and after discharge from the maternity ward but also the major cause of readmission in the 15 first days of life. Therefore in the past 20 years, numerous countries have written national practical guidelines for the management of neonatal jaundice using various methodologies. Most of the time, the guidelines resulted from expert consensus more than from an evidence-based argument. The Société française de néonatologie created a working group to provide the first French clinical guidelines for the management of jaundice in the near-term newborn (35 weeks and more). They were written following a physiopathological argument and taking into account both clinical risk factors for severe hyperbilirubinemia and interindividual variability in vulnerability to bilirubin neurotoxicity. Practical tools were also developed to facilitate implementation of the guidelines and are also included.

Phototherapy for the Treatment of Neonatal Jaundice and Breastfeeding Duration and Exclusivity

INTRODUCTION

Because neonatal jaundice remains one of the most commonly treated conditions of the newborn infant, it is important to assess the unintended consequences of treatment with phototherapy. The objective of this study was to evaluate whether treatment with phototherapy affects breastfeeding duration in newborns >35 weeks gestation.

MATERIALS AND METHODS

We analyzed data from the Infant Feeding Practices Study II. The exposure of interest was treatment of neonatal jaundice with phototherapy. The outcomes of interest were any breastfeeding through 12 months and exclusive breastfeeding through 4 months. Logistic regression models were developed to evaluate the association between the exposure and outcomes of interest. All models were adjusted for maternal age, race, education, household income, and gestational age, as well as for several potential markers of suboptimal breastfeeding.

RESULTS

Our study included 4,441 infants, of which 220 (5%) received phototherapy. We found no difference in the likelihood of any breastfeeding through 9 months of age, however, by 12 months, infants exposed to phototherapy were less likely to still be breastfed than those who were not exposed (adjusted odds ratio [aOR] 0.58, 95% confidence interval [95% CI] 0.37-0.92). Infants exposed to phototherapy were less likely to be exclusively breastfed throughout the first 4 months of life.

CONCLUSION

Although phototherapy use did not substantially impact rates of any breastfeeding during the first year, it was associated with decreased rates of exclusive breastfeeding in the first 4 months of life. This suggests that we need to tailor messaging to mothers of infants receiving phototherapy to promote exclusive breastfeeding.

Lactation support and breastfeeding duration in jaundiced infants: a randomized controlled trial

Objectives

Neonatal jaundice is the most common problem in full-term infants during the immediate post-natal period. We examined the effect of a lactation support intervention on breastfeeding duration in hospitalized jaundiced infants.

Study Design

We conducted a randomized controlled trial with a qualitative component involving mothers of hospitalized jaundiced breastfed infants <4 weeks of age. Mothers receiving the intervention met with an International Board-Certified Lactation Consultant in hospital and 1–3 times post discharge. Both groups received the standard care for jaundice. The primary outcome was exclusive breastfeeding at 3 months. To the exception of research assistants enrolling participants and completing qualitative interviews, all research staff, investigators and statisticians were blinded to group assignment. Qualitative interviews elicited feedback on breastfeeding experiences for both groups.

Results

99 participants were recruited, and 86 analyzed for primary outcome. There was no difference in exclusive breastfeeding at 3 months between groups (RR 0.84, 95% CI 0.56–1.24, p = 0.40) or in the secondary outcomes. 31 participants were included in the qualitative analysis. Participants in the intervention group described an increase in comfort and confidence levels with breastfeeding. Participants in the control group reported limited lactation support.

Conclusions

Our hospital-based lactation support program did not result in a higher proportion of mothers exclusively breastfeeding at 3 months compared to current hospital standard care. Qualitative feedback from the intervention group suggests that mothers’ confidence was increased, which is linked to breastfeeding duration. The decision to breastfeed is multifactorial and hospital-based lactation support may be only a small piece of the puzzle in hospitalized jaundiced infants. Further studies may be needed to fully elucidate the impact of an in-hospital lactation support program on successful breastfeeding for these infants.

Trial Registration

ClinicalTrials.gov NCT00966719 https://www.clinicaltrials.gov/ct2/show/NCT00966719?term=Lactation+Support+and+Breastfeeding+Duration+in+Jaundiced+Infants%3A+a+Randomized+Controlled+Trial&rank=1

Association between G6PD deficiency and hyperbilirubinemia in neonates: a meta-analysis

Hyperbilirubinemia is prevalent in newborns and multiple factors are responsible for the occurrence of neonatal hyperbilirubinemia. G6PD (Glucose-6-Phosphate Dehydrogenase) deficiency is recognized as one of the risk factors. However, many pediatricians did not take into account the probable effect of G6PD-deficiency when severe neonatal hyperbilirubinemia occurred. The aim of the present study was to perform a meta-analysis to investigate whether G6PD-deficiency increases the risk of hyperbilirubinemia and phototherapy in newborn. We searched PubMed and Embase databases for eligible articles according to explicit study inclusion and exclusion criteria. Risk ratios (RRs) and 95% confidence interval (CI) were selected as the evaluation indexes. Cochrane Q and I(2) test were utilized to assess the heterogeneity among studies. A total of five cohort studies were included in this meta-analysis. There were 21,585 participants enrolled in these studies including 877 newborns with hyperbilirubinemia and 261 newborns receiving phototherapy. Comparison of the incidence of hyperbilirubinemia in newborns with G6PD-deficiency to the ones with normal G6PD in each study yielded a pooled RR of 3.92 (95% CI, 2.13-7.20; P <.0001). The pooled RR of receiving phototherapy in G6PD-deficiency neonates is 3.01 (95% CI, 2.20-4.12; P <.0001) when compared to G6PD normal neonates. This study revealed a significant correlation between G6PD-deficiency and neonatal hyperbilirubinemia, as well as G6PD-deficiency and phototherapy. G6PD-deficient newborns have higher risk of hyperbilirubinemia and phototherapy than the ones with normal G6PD. Monitoring the level of G6PD in newborns is important for predicting the occurrence of hyperbilirubinemia.

Evaluation of risk factors for development of severe hyperbilirubinemia in term and near term infants in Turkey

Objective: To determine clinical features, etiology and risk factors in term and near term newborns with severe hyperbilirubinemia.

Methods: During ten years period (2000 - 2009), infants of ≥ 35 gestational weeks who received phototherapy were evaluated retrospectively. The study population was divided into two groups and clinical features, etiology and risk factors were compared. Group 1 defined by those who had bilirubin level ≥25 mg/dl (severe hyperbilirubinemia) and group 2 defined by bilirubin level <25 mg/dl.

Results: During the study period 1335 babies were evaluated. Severe hyperbilirubinemia was found in 137 (10.3%) patients. Total serum bilirubin level was 29.7±4.7 mg/dl in group 1 and 18.9±3.5 mg/dl in group 2. Pathological weight loss, vaginal delivery and supplementary feeding were identified as significant risk factors for development of severe hyperbilirubinemia (p <0.001, p <0.001 and p = 0.04, respectively). The time at recognition of jaundice by family and postnatal age at admission were significantly higher in group 1. The ratios of previous sibling received phototherapy and being the second child or after were found higher in group 1.

Conclusion: Pathological weight loss, vaginal delivery and supplementary feeding were determined as risk factors for development of severe hyperbilirubinemia. The newborns with severe hyperbilirubinemia had late recognition of jaundice and admission to hospital by their families.

Home-use icterometry in neonatal hyperbilirubinaemia: Cluster-randomised controlled trial in Vietnam

AIM

To determine whether home-use icterometry improves parental recognition of neonatal jaundice, early care seeking and treatment to minimize risks of bilirubin encephalopathy.

METHODS

Cluster-randomised controlled trial of community-level icterometry used at home by mothers in Chi Linh, Vietnam. Rural health-care workers identified and enrolled term newborns. Post-partum mothers received jaundice education and icterometry instructions and were cluster-randomised by commune. Cases received icterometers (icterometer group (IG)) and controls did not (control group (CG)). Subjects received mobile telephone calls from post-natal days 2-7 to determine maternal recognition by visual inspection and icterometer detection of jaundice (≥ 3.0 on five-point scale). Mothers without telephones, premature newborns (<35 weeks) or newborns hospitalised >5 days were excluded.

RESULTS

Three hundred fifty-two subjects were enrolled (183 IG and 169 CG), of whom 11 (3.4%) were lost to telephone follow-up. Jaundice was recognised and/or detected in 94 (27%) of all newborns. Icterometry helped 11 mothers (6%) detect neonatal jaundice that was not visually recognised by IG mothers. Detection by IG mothers was not statistically greater than CG mothers (P = 0.09). Follow-up care seeking was 8% in both groups (P = 0.2), and 11% of jaundiced newborns received treatment (9% IG vs. 16% CG, P = 0.3). Newborns who received care had bilirubin measurements that averaged 257 μmol/L IG vs. 322 μmol/L CG (P = 0.3). There were no deaths.

CONCLUSIONS

In this pilot study, home-use icterometry may help improve parental detection of jaundice in rural Vietnam. However, larger studies are necessary to determine the changes in recognition, care seeking and treatment.

Severe neonatal hyperbilirubinemia and UGT1A1 promoter polymorphism

OBJECTIVE

To assess whether UGT1A1 promoter polymorphisms associated with Gilbert Syndrome (GS) occur with a greater frequency in neonates with severe hyperbilirubinemia.

STUDY DESIGN

In a case-control study performed at a single hospital center in Italy, 70 case subjects with severe hyperbilirubinemia (defined as bilirubin level ≥20 mg/dL or 340 μmol/L) and 70 controls (bilirubin level <12 mg/dL or 210 μmol/L) were enrolled. Both case and control subjects were full term newborns. Polymerase chain reaction analysis on blood spot was performed to determine the frequency of UGTA1A1 promoter polymorphisms in cases and controls.

RESULTS

No statistical difference in the prevalence of UGTA1A1 gene variants was found between cases and controls (P = 1). Thirteen infants homozygous for (TA)7 polymorphism associated with GS were in the case group (18.6%) and 14 in the control group (20.0%). A heterozygous group was also equally distributed between cases (44.3%) and controls (42.9%). No (TA)8 repeat was found in the 2 groups.

CONCLUSIONS

In our study population, GS polymorphism alone does not appear to play a major role in severe neonatal hyperbilirubinemia in neonates without signs of hemolysis.

Rates of obstetric intervention and associated perinatal mortality and morbidity among low-risk women giving birth in private and public hospitals in NSW (2000-2008): a linked data population-based cohort study

OBJECTIVES

To examine the rates of obstetric intervention and associated perinatal mortality and morbidity in the first 28 days among low-risk women giving birth in private and public hospitals in NSW (2000-2008).

DESIGN

Linked data population-based retrospective cohort study involving five data sets.

SETTING

New South Wales, Australia.

PARTICIPANTS

691 738 women giving birth to a singleton baby during the period 2000-2008.

MAIN OUTCOME MEASURES

Rates of neonatal resuscitation, perinatal mortality, neonatal admission following birth and readmission to hospital in the first 28 days of life in public and private obstetric units.

RESULTS

Rates of obstetric intervention among low-risk women were higher in private hospitals, with primiparous women 20% less likely to have a normal vaginal birth compared to the public sector. Neonates born in private hospitals were more likely to be less than 40 weeks; more likely to have some form of resuscitation; less likely to have an Apgar <7 at 5 min. Neonates born in private hospitals to low-risk mothers were more likely to have a morbidity attached to the birth admission and to be readmitted to hospital in the first 28 days for birth trauma (5% vs 3.6%); hypoxia (1.7% vs 1.2%); jaundice (4.8% vs 3%); feeding difficulties (4% vs 2.4%) ; sleep/behavioural issues (0.2% vs 0.1%); respiratory conditions (1.2% vs 0.8%) and circumcision (5.6 vs 0.3%) but they were less likely to be admitted for prophylactic antibiotics (0.2% vs 0.6%) and for socioeconomic circumstances (0.1% vs 0.7%). Rates of perinatal mortality were not statistically different between the two groups.

CONCLUSIONS

For low-risk women, care in a private hospital, which includes higher rates of intervention, appears to be associated with higher rates of morbidity seen in the neonate and no evidence of a reduction in perinatal mortality.

Correlation of UGT1A1 TATA-box polymorphism and jaundice in breastfed newborns-early presentation of Gilbert's syndrome

OBJECTIVE

The etiology of jaundice in otherwise healthy breastfed newborns that can present as early-onset exaggerated physiologic jaundice, or late breast milk jaundice (BMJ), is not yet entirely understood. This study tested the hypothesis that molecular marker for Gilbert's syndrome (GS), UGT1A1 TATA-box polymorphism, is associated with this disorders.

METHODS

We have investigated the UGT1A1 polymorphism frequency and its relation to severity of hyperbilirubinemia and jaundice duration among 220 exclusively breastfed term newborns; 57 of them with non-physiologic hyperbilirubinemia (NH), and 163 with BMJ, and in 187 healthy controls.

RESULTS

Significant differences in TA7/7 genotype frequency were established. The highest frequency was observed among the newborns with BMJ (42.0%), intermediate in the NH group (24.6%), while the controls had the lowest TA7/7 frequency (12.8%). Linear increase in TA7/7 frequency was observed depending on the duration of jaundice, peaking at 42.4% in newborns with the longest jaundice duration. Positive correlation between the serum bilirubin levels and the TATA-box length was established in all groups.

CONCLUSION

This study provides evidence that UGT1A1 TATA-box polymorphism is an important risk factor for developing jaundice in term breastfed newborns, presented as either early non-physiologic hyperbilirubinemia or breast milk jaundice. These results further support the original Odell's idea of neonatal jaundice as an early presentation of GS.

Factors affecting bilirubin levels during first 48 hours of life in healthy infants

OBJECTIVE

To investigate the relationship of delivery type, maternal anesthesia, feeding modalities, and first feeding and meconium passage times with early bilirubin levels of healthy infants.

METHODS

Cord, 24 hours' and 48 hours' total bilirubin levels were measured in 388 study infants.

RESULTS

Infants born with cesarean section were fed later and more often had mixed feeding. First meconium passage was delayed with general anesthesia. Cord, 24 and 48 hours' bilirubin levels were not correlated with first feeding time, meconium passage time, mode of delivery, existence and type of anesthesia, and feeding modalities. Being in high intermediate risk zone at 72 hours of Bhutani's nomogram was only related to first feeding time and high cord bilirubin level. Late preterm infants were more frequently born with cesarean section and offered supplementary formula. Therefore, first meconium passage times and bilirubin levels were similar in the late preterm and term infants.

CONCLUSIONS

Type of delivery or anesthesia, late prematurity, feeding modalities, and first meconium passage time were not related to early bilirubin levels in healthy neonates, but delayed first feeding and high cord bilirubin levels were related to be in higher risk zone for later hyperbilirubinemia.

Breastfeeding and neonatal weight loss in healthy term infants

BACKGROUND

Neonatal weight loss is universally recognized, yet poorly understood. Limited professional consensus exists on the definition of lower limit of safe weight loss.

OBJECTIVE

Our aim was to assess the extent of neonatal weight loss and its association with selected clinical variables in a population of healthy term infants cared for using a specific protocol on weight loss.

METHODS

We retrospectively considered 1003 infants consecutively admitted to the regular nursery of the Institute for Maternal and Child Health "Burlo Garofolo" (Trieste, Italy). We studied the relationship of selected variables with neonatal weight loss recorded during the hospital stay. We also analyzed all readmissions in the first month of life as a result of weight loss and its complications.

RESULTS

We observed a mean absolute weight loss of 228 g ± 83g, and a mean percent weight loss of 6.7% ± 2.2%. Weight loss ≥ 10% and > 12% were 6% and 0.3%, respectively. In multivariate logistic regression, cesarean section, hot season, any formula feeding, and jaundice not requiring phototherapy were independently associated with neonatal weight loss ≥ 8%. Conversely, low gestational age status was associated with lower weight loss. Readmission within the first month of life because of dehydration occurred in 0.3% of infants.

CONCLUSIONS

Breastfeeding, compared to formula feeding, may not be a risk factor for greater early neonatal weight loss, at least in contexts in which weight is routinely monitored, breastfeeding is repeatedly assessed and appropriately supported, and careful supplementation is prescribed to limit and promptly treat excess weight loss and its related complications.

Does the LATCH score assessed in the first 24 hours after delivery predict non-exclusive breastfeeding at hospital discharge?

AIM

The aims of this study were to analyze the relationship between the LATCH score assessed in the first 24 hours after delivery and non-exclusive breastfeeding at discharge and to identify a cutoff for the LATCH score in order to identify women with higher risk of non-exclusive breastfeeding who may need additional breastfeeding support.

SUBJECTS AND METHODS

We conducted a prospective observational study in the Maternity Ward of the Institute for Maternal and Child Health "Burlo Garofolo" (Trieste, Italy) and collected data from 299 mother-infant dyads.

RESULTS

The rate of nonexclusive breastfeeding was inversely related to the LATCH score (p<0.001) with non-exclusive breastfeeding infants scoring less (6.9) than infants exclusively breastfed at discharge (7.6) (p=0.001). In multivariate analysis, non-exclusive breastfeeding was also associated with cesarean section, primiparity, and infant phototherapy. In order to support maternity staff in providing targeted interventions, we identified four LATCH score cutoffs associated with as many risk groups for non-exclusive breastfeeding at discharge.

CONCLUSIONS

The LATCH score is a useful tool to identify mother-infant pairs who might benefit from additional skilled support in specific subgroups at risk of non-exclusive breastfeeding at discharge. Future research is needed to explore if the LATCH score assessed in the first days of life can also predict the duration of breastfeeding.

Elevated bile acids in newborns with Biliary Atresia (BA)

Biliary Atresia (BA), a result from inflammatory destruction of the intrahepatic and extrahepatic bile ducts, is a severe hepatobiliary disorder unique to infancy. Early diagnosis and Kasai operation greatly improve the outcome of BA patients, which encourages the development of early screening methods. Using HPLC coupled tandem mass spectrometry, we detected primary bile acids content in dried blood spots obtained from 8 BA infants, 17 neonatal jaundice and 292 comparison infants at 3–4 days of life. Taurocholate (TC) was significantly elevated in biliary atresia infants (0.98±0.62 µmol/L) compared to neonatal jaundice (0.47±0.30 µmol/L) and comparison infants (0.43±0.40 µmol/L), with p = 0.0231 and p = 0.0016 respectively. The area under receiver operating characteristic (ROC) curve for TC to discriminate BA and comparison infants was 0.82 (95% confidence interval: 0.72–0.92). A cutoff of 0.63 µmol/L produced a sensitivity of 79.1% and specificity of 62.5%. The concentrations of total bile acids were also raised significantly in BA compared to comparison infants (6.62±3.89 µmol/L vs 3.81±3.06 µmol/L, p = 0.0162), with the area under ROC curve of 0.75 (95% confidence interval: 0.61–0.89). No significant difference was found between the bile acids of neonatal jaundice and that of comparison infants. The early increase of bile acids indicates the presentation of BA in the immediate newborn period and the possibility of TC as newborn screening marker.

Neonatal bilirubin triage with transcutaneous meters: when is a blood draw necessary?

OBJECTIVE

To find the optimal transcutaneous bilirubin (TcB) screening level in term neonates that minimizes the discomfort of phlebotomy, while protecting the child from harm and controlling costs.

METHODS

All available TcB and total serum bilirubin (TSB) measurements taken between 27 and 51 hours of life from a cohort of term newborns were analyzed in a retrospective chart review. TcB cutoffs between 6 and 12 mg/dL were evaluated for their negative predictive values (NPVs) for high risk (HR) and for the combination of high-intermediate risk and HR on the Bhutani TSB risk nomogram.

RESULTS

One thousand seventy-one full-term newborns were entered into the study. Of 601 newborns with TcB < 7 mg/dL, none were HR by TSB. Of newborns with a TcB of < 8 mg/dL, 1 in 759 was HR. The NPVs for screening levels of 7 and 8 mg/dL were of 100% and 99.9%, respectively, for HR and 99% and 97.60%, respectively, for high-intermediate/HR. A cutoff at 12 mg/dL had NPVs of 99.3% for HR, with 7 neonates, and 92.7% for high-intermediate/HR, with 76 infants of 1041.

CONCLUSIONS

In our center, term infants with a TcB of < 8 mg/dL may be safely discharged without a follow-up TSB, with the understanding that -1/1000 infants may be at HR for developing severe hyperbilirubinemia. Practices with universal follow-up may safely choose cutoffs up to 12 mg/dL. An institution's degree of comfort and confidence in follow-up of the newborn cohort will guide the choice of an appropriate TcB cutoff requiring a TSB.

Factors associated with extreme hyperbilirubinaemia in neonates at the University Hospital of the West Indies

AIM

To determine factors associated with extreme hyperbilirubinaemia in neonates at the University Hospital of the West Indies.

METHODS

A retrospective review of all neonates with hyperbilirubinaemia requiring medical intervention at the University Hospital of the West Indies between 1 January 2006 and 30 June 2007 was performed. Factors associated with extreme hyperbilirubinaemia were determined using multiple logistic regression models.

RESULTS

A total of 170 neonates fulfilled the inclusion criteria for the study and 15 (9%) of them had extreme hyperbilirubinaemia. The majority (97, 57%) were term infants and 103 (61%) were male. Exclusively breastfed neonates were more likely to have extreme hyperbilirubinaemia (OR 2.6, 95% CI 0.01-0.6). Neonates whose mothers received oxytocin during labour (OR 2.7, 95% CI 0.02-0.3) and those who were G6PD-deficient (OR 2.6, 95% CI 0.01-0.5) were more likely to have extreme hyperbilurubinaemia.

CONCLUSION

Exclusive breastfeeding, oxytocin use in the mother during labour and G6PD deficiency in the infant were found to be factors associated with extreme hyperbilirubinaemia.

Evaluation of maternal knowledge level about neonatal jaundice

OBJECTIVE

To evaluate the knowledge of mothers on neonatal jaundice.

METHODS

This study was conducted on 161 mothers who had given birth to healthy newborns at Izmir Aegean Gynecology and Obstetrics Hospital between January 2010 and April 2010. A questionnaire was used to assess the mothers' knowledge on neonatal jaundice. Knowledge was evaluated as "sufficient" or "insufficient" based on responses. Sufficiently informed mothers were compared with insufficiently informed group for the knowledge level about neonatal jaundice.

RESULTS

The rate of insufficiently informed mothers was 53.6%. Logistic regression analysis showed that education level and having a previous offspring with jaundice were independent variables affecting the mothers' knowledge level. Low education level was found to increase the probability of the mothers' knowledge level to be insufficient by 2.1 folds (OR 2.1, 95% CI 1.3-3.4; p = 0.003). Being informed beforehand by a previous offspring with jaundice increased the probability of the mothers' knowledge to be sufficient by twofolds (OR 2, 95% CI 1.1-3.7; p = 0.03).

CONCLUSION

It is found that the mothers' knowledge about neonatal jaundice is insufficient. Maternal education level and having a previous offspring with jaundice are major factors affecting the knowledge of the mothers on hyperbilirubinemia.

Weight loss percentage prediction of subsequent neonatal hyperbilirubinemia in exclusively breastfed neonates

BACKGROUND

The incidence of neonatal hyperbilirubinemia in our hospital has increased since the implementation of breastfeeding promotion. Inadequate breastfeeding results in reduced calorie intake, weight loss and neonatal hyperbilirubinemia. Supplementary feeding is required if breastfeeding proves inadequate. However, the optimal weight loss cut-off value for supplementary feeding is unknown.

METHODS

We collected records for all healthy neonates with a gestational age ≥35 weeks and birth body weight (BBW) above 2500 g, born between March 2002 and July 2005, from our nursery. A total of 1979 neonates were reviewed, 874 of whom were exclusively breastfed and subsequently enrolled in this study. Only infants who were breastfed exclusively were enrolled; 219 of these infants (25.1%) presented significant hyperbilirubinemia after 72 hours of age. Infants with early-onset (<48 hours) hyperbilirubinemia or any known risk factors for neonatal hyperbilirubinemia were excluded. We analyzed the association between weight loss percentage and hyperbilirubinemia and investigated the best weight loss percentage cut-off value for the prediction of subsequent hyperbilirubinemia before 2 weeks of age.

RESULTS

Neonates with lower gestational age and greater weight loss percentage were associated with hyperbilirubinemia. By using weight loss ≥8% of BBW after 48 hours and weight loss ≥11% of BBW after 72 hours as the cut-off values for the prediction of subsequent hyperbilirubinemia, negative predictive values were 77.7% and 76.8%, respectively.

CONCLUSION

This study documented the relationship between weight loss percentage and subsequent hyperbilirubinemia incidence. Our data provide a basis for determination of an optimal weight loss percentage cut-off value that indicates supplementary feeding.

Risk factors for hyperbilirubinemia in breastfed term neonates

Increased breastfeeding was suggested as a contributing factor to significant hyperbilirubinemia. The aim of this study was to identify the risk factors associated with jaundice in exclusively breastfed term neonates. We retrospectively reviewed all consecutively live-born neonates from August 2009 to July 2010 who had complete outpatient department (OPD) follow-up at ≤14 days old. Hyperbilirubinemia was defined as a transcutaneous bilirubin (TcB) value of ≥15 mg/dl. During the study period, there were 718 deliveries, of which 152 neonates were transferred to the special care nursery or neonatal intensive care unit; 566 neonates were discharged from the nursery, and 243 neonates were excluded: 83 did not return to the OPD, 46 were older than 14 days at OPD follow-up, 44 were <37 weeks of gestational age, and 70 had been fed formula. In total, 323 neonates were enrolled and classified into the hyperbilirubinemic (114 neonates) and non-hyperbilirubinemic groups (209 neonates). The gender, gestational age, Apgar score, age at nursery discharge, birth weight, and body weight at nursery discharge and at OPD were comparable between the two groups. TcB values at nursery discharge were positively correlated with TcB values in the OPD. Infants with hyperbilirubinemia exhibited significantly greater body weight loss from birth to the OPD follow-up and significantly less body weight gain from nursery discharge to OPD follow-up.

CONCLUSION

High TcB values at nursery discharge and a smaller body weight gain are associated with hyperbilirubinemia in term neonates who are exclusively breastfed.

Combined treatment strategies for unconjugated hyperbilirubinemia in Gunn rats

We recently demonstrated that acceleration of the gastrointestinal transit by polyethylene glycol (PEG) treats unconjugated hyperbilirubinemia in jaundiced Gunn rats. It is unclear whether acceleration of gastrointestinal transit also (partly) underlies the therapeutic effects of established hypobilirubinemic treatments or whether PEG cotreatment might enhance these effects. We treated Gunn rats with phototherapy (17 μW/cm2/nm), orlistat (200 mg/kg chow), ursodeoxycholate (5 g/kg chow), or calcium phosphate (CaP) (20 g/kg chow) either as single treatment or in combination with PEG. Three weeks of phototherapy, orlistat, ursodeoxycholic acid, or CaP treatment decreased plasma unconjugated bilirubin (UCB) levels by 47, 27, 28, and 45%, respectively (each p < 0.001), without a significant impact on gastrointestinal transit time. PEG cotreatment accelerated the gastrointestinal transit in all treatment groups, which resulted in an additive hypobilirubinemic effect of -20% and -26% (final plasma UCB -67 and -53%, respectively) in phototherapy- and orlistat-treated animals. PEG cotreatment did not enhance the hypobilirubinemic effect of ursodeoxycholic acid or CaP. We conclude that phototherapy, orlistat, ursodoxycholic acid, and CaP do not exert their hypobilirubinemic effect via acceleration of the gastrointestinal transit. PEG cotreatment enhanced the hypobilirubinemic effects of phototherapy and of orlistat treatment. Current results support a clinical trial to evaluate PEG cotreatment during phototherapy.

The effect of kangaroo mother care on the duration of phototherapy of infants re-admitted for neonatal jaundice

OBJECTIVE

We investigated the effect of kangaroo mother care (KMC) on the duration of phototherapy of jaundiced neonates.

METHODS

Fifty Egyptian newborns hospitalized for jaundice were investigated through a prospective observational study to determine whether intermittent KMC would reduce the duration of phototherapy required.

RESULTS

The babies who received KMC recovered earlier from jaundice and needed a shorter duration of phototherapy than the control group (68.14 ± 24.32 hour versus 100.86 ± 42.26 hour, p = 0.004).

CONCLUSION

KMC may be an effective intervention to reduce the duration of phototherapy needed when jaundiced babies are hospitalized.

Hyperbilirubinemia: current guidelines and emerging therapies

It is estimated that about two thirds of newborns will appear clinically jaundiced during their first weeks of life. As newborns and their mothers spend fewer days in the hospital after birth, the number of infants readmitted yearly in the United States for neonatal jaundice over the last 10 years has increased by 160%. A portion of these infants present to the emergency department, requiring a careful history and physical examination assessing them for the risk factors associated with pathologic bilirubin levels. Although the spectrum of illness may be great, the overwhelming etiology of neonatal jaundice presenting to an emergency department is physiologic and not due to infection or isoimmunization. Therefore, a little more than a good history, physical examination, and indirect/direct bilirubin levels are needed to evaluate an otherwise well-appearing jaundiced newborn. The American Academy of Pediatrics' 2004 clinical practice guidelines for "Management of Hyperbilirubinemia in the Newborn Infant 35 or More Weeks of Gestation" are a helpful and easily accessible resource when evaluating jaundiced newborns (available at http://aappolicy.aappublications.org/cgi/content/full/pediatrics;114/1/297). There are several exciting developments on the horizon for the diagnosis and management of hyperbilirubinemia including increasing use of transcutaneous bilirubin measuring devices and medications such as tin mesoporphyrin and intravenous immunoglobulin that may decrease the need for exchange transfusions.

Transcutaneous bilirubin in exclusively breastfed healthy term newborns up to 12 days of life

OBJECTIVE

To determine the curve of transcutaneous bilirubin in breastfed term neonates up to 12 days of life.

METHODS

In a prospective cohort study, we performed a 12-day evaluation of 223 healthy, exclusively breastfed, appropriate-for-gestational-age neonates who roomed-in for at least 48 hours. Each newborn had forehead transcutaneous bilirubin and body weight measured at the end of 1, 2, 3, 4, 5, 6, 8, 10, and 12 days. Regression analysis was used with bilirubin as a third-degree polynomial function of time. The 25th, 50th, 75th, 90th, and 95th percentile curves were constructed by using the residual mean square for each day.

RESULTS

Patients were 46% white, 34% mixed race, and 20% black, the mean birth weight was 3260 g (range: 2560-4090 g), the mean gestational age was 39.4 weeks (range: 37.0-41.9 weeks), 51% were male, 74% were born by vaginal delivery, and 66% had been breastfed since delivery. The mean highest weight loss was 4.7% (range: 1%-12%) at the second or third day, and in most infants the weight returned to the birth weight at the fifth day. With 2007 total bilirubin measurements, bilirubin concentrations reached the 50th percentile level (5.6 mg/dL) at the third and fourth days and returned to the 24-hour level (4.8 mg/dL) at the sixth day. The 95th percentile bilirubin level was 8.2 mg/dL at 24 hours of life, reached 12.2 mg/dL on the fourth day, and declined to 8.5 mg/dL on the 12th day.

CONCLUSIONS

The transcutaneous bilirubin curve represents the natural history of bilirubinemia in exclusively breastfed healthy term newborns in the first 12 days of life.

An observational study of associations among maternal fluids during parturition, neonatal output, and breastfed newborn weight loss

BACKGROUND

Newborn weight measurements are used as a key indicator of breastfeeding adequacy. The purpose of this study was to explore non-feeding factors that might be related to newborn weight loss. The relationship between the intravenous fluids women receive during parturition (the act of giving birth, including time in labour or prior to a caesarean section) and their newborn's weight loss during the first 72 hours postpartum was the primary interest.

METHODS

In this observational cohort study, we collected data about maternal oral and IV fluids during labour or before a caesarean section. Participants (n = 109) weighed their newborns every 12 hours for the first three days then daily to Day 14, and they weighed neonatal output (voids and stools) for three days.

RESULTS

At 60 hours (nadir), mean newborn weight loss was 6.57% (SD 2.51; n = 96, range 1.83-13.06%). When groups, based on maternal fluids, were compared (≤1200 mls [n = 21] versus > 1200 [n = 53]), newborns lost 5.51% versus 6.93% (p = 0.03), respectively. For the first 24 hours, bivariate analyses show positive relationships between a) neonatal output and percentage of newborn weight lost (r(96) = 0.493, p < 0.001); and b) maternal IV fluids (final 2 hours) and neonatal output (r(42) = 0.383, p = 0.012). At 72 hours, there was a positive correlation between grams of weight lost and all maternal fluids (r(75) = 0.309, p = 0.007).

CONCLUSIONS

Timing and amounts of maternal IV fluids appear correlated to neonatal output and newborn weight loss. Neonates appear to experience diuresis and correct their fluid status in the first 24 hours. We recommend a measurement at 24 hours, instead of birth weight, for baseline when assessing weight change. Because practices can differ between maternity settings, we further suggest that clinicians should collect and analyze data from dyads in their care to determine an optimal baseline measurement.

Influence of breast-feeding on weight loss, jaundice, and waste elimination in neonates

BACKGROUND

The Baby-Friendly Hospital Initiative began promoting exclusive breast-feeding in 2001 in Taiwan; however, few studies have investigated its impact. This study evaluated the influence of breast-feeding on Taiwanese neonates with regard to the frequency of jaundice, body weight loss (BWL), and elimination of both urine and stool.

METHODS

The medical records of 313 healthy mother-neonate pairs admitted at our hospital were reviewed retrospectively and divided into three groups: exclusively breast-feeding (n=161), mixed (breast/formula) feeding (n=80), and exclusively formula feeding (n=72).

RESULTS

Compared with the exclusively formula feeding group, in the exclusively breast-fed neonates, the average total serum bilirubin level at 3 days after birth (p < 0.001) and the rate of significant hyperbilirubinemia ≥ 15 mg/dL (p<0.05) were significantly higher; the average BWLs at 2 and 3 days after birth (p < 0.001, p < 0.001) and the rate of BWL ≥ 10% (p < 0.05) were significantly higher; the average frequency of stool passage at 2 and 3 days after birth (p < 0.001, p < 0.001) and urination at 1, 2, and 3 days after birth (p < 0.001, p < 0.001, p < 0.001) were significantly less. The factors associated with a mother's choice of infant feeding type include maternal age and delivery method.

CONCLUSION

Breast-feeding during the initial days of life has a significant influence on the degree of jaundice, amount of BWL, and the frequency of stool passage and urination.

211 G to a variation of UDP-glucuronosyl transferase 1A1 gene and neonatal breastfeeding jaundice

Breastfeeding jaundice is a common problem in neonates who were exclusively breastfed, but its pathogenesis is still unclear. The uridine diphosphate glucuronosyl transferase 1A1 (UGT1A1) gene polymorphism was shown to contribute to the development of neonatal hyperbilirubinemia. We hypothesize that the variation of UGT1A1 gene may contribute to neonatal breastfeeding jaundice. We prospectively enrolled 688 near-term and term infants who were exclusively breastfed (BF group) or were supplemented by infant formula partially (SF group) before onset of hyperbilirubinemia. Genotyping of the promoter and exon1 of UGT1A1 was performed in all neonates. Neonates in BF group had a significantly higher maximal body weight loss ratio, peak bilirubin level, and a greater incidence of hyperbilirubinemia than those in SF group. Neonates with nucleotide 211 GA or AA variation in UGT1A1 genotypes had higher peak serum bilirubin levels and higher incidence of hyperbilirubinemia than WTs (GG). This phenomenon was only seen in BF group but not in SF group when subset analysis was performed. This suggests that neonates who carry the nucleotide 211 GA or AA variation within coding region in UGT1A1 gene are more susceptible to develop early-onset neonatal breastfeeding jaundice.

Clinical and genetic risk factors for moderate hyperbilirubinemia in Brazilian newborn infants

OBJECTIVE

To identify clinical and genetic risk factors for moderate hyperbilirubinemia during the first week of life.

STUDY DESIGN

Using univariate and multivariate multiple regression analyses, the RR for clinical factors, the African variant of glucose-6-phosphate dehydrogenase (G6PD) deficiency (G202A/A376G), and (TA)(n) UGT1A1 polymorphisms were established in a cohort of 608 Brazilian newborn infants. Hyperbilirubinemia was monitored until 134.5 ± 49.8 h of life (IQR, 111.0 to 156.7). The dependent variable was total bilirubinemia (TB) ≥12.9 mg per 100 ml estimated by transcutaneous or plasma bilirubin measurements.

RESULT

The African variant of G6PD deficiency and (TA)(7)/(TA)(7) and (TA)(7)/(TA)(8) polymorphisms present in 6.1 and 12.0% of newborns, respectively, were not risk factors for moderate hyperbilirubinemia. Coexpression of G6DP deficiency and UGT1A1 polymorphisms occurred in 0.49% of the subjects. Independent clinical predictors for TB≥ 12.9 mg per 100 ml were gestational age <38 weeks and reference curve percentiles >P40th.

CONCLUSION

In this study, G6PD deficiency and UGT1A1 gene promoter polymorphisms were not risk factors for moderate hyperbilirubinemia. Genetic factors may vary considerably in importance among different populations.