Neonatal Hyperbilirubinemia

\## Brief Summary Neonatal hyperbilirubinemia is one of the most common causes of neonatal hospitalization and phototherapy treatment. Although phototherapy is highly effective, rebound hyperbilirubinemia following discontinuation of phototherapy may occur in some infants and may require repeat treatment. Early identification of neonates at risk for clinically significant rebound hyperbilirubinemia could help optimize discharge timing and reduce unnecessary hospital stay and repeat bilirubin testing. This prospective observational study aims to evaluate the predictors of rebound hyperbilirubinemia after phototherapy discontinuation in neonates admitted to the NICU. Particular focus will be placed on the role of delta total serum bilirubin (ΔTSB), defined as the difference between the phototherapy threshold and the measured bilirubin level at the time of phototherapy discontinuation. Clinical, demographic, laboratory, hemolytic, feeding-related, and phototherapy-related variables will also be analyzed. The primary outcome will be clinically significant rebound hyperbilirubinemia requiring repeat phototherapy within 24-48 hours after discontinuation of the initial phototherapy treatment. Secondary outcomes include rebound bilirubin levels, duration of hospitalization, and factors associated with repeat phototherapy.

Rationale: Neonatal hyperbilirubinemia is highly prevalent in very preterm infants born \<30 weeks. Since 2008, uniform Dutch phototherapy thresholds for preterm infants have been used nationwide, largely based on consensus. Consequently, \>80% of very preterm infants receive phototherapy for several days, accompanied by repeated blood sampling and reduced opportunities for skin-to-skin care. The corresponding UK National Institute for Health and Care Excellence (NICE) guideline applies higher (less strict) thresholds, which may reduce overtreatment, but comparative safety for very preterm infants has not been established in a randomized trial. The investigators hypothesize that using NICE thresholds is non-inferior to Dutch thresholds for survival without neurodevelopmental impairment (NDI) at two years' corrected age, while reducing treatment burden. Objective: Primary: To determine whether initiating phototherapy according to NICE thresholds is non-inferior to Dutch thresholds with regard to survival without NDI at two years' corrected age in infants born \<30 weeks of gestation. Secondary: To compare phototherapy exposure (incidence, duration and cumulative exposure) and monitoring burden (e.g., number of bilirubin blood samples, temperature instability, biomarkers of oxidative stress (subpopulation)), and to evaluate parent-infant outcomes (skin-to-skin contact time, parental stress/satisfaction), and nursing workload (time dedicated to bilirubin-related care). Study design: Nationwide multicenter, parallel-group, open-label randomized non-inferiority trial with 1:1 allocation, stratified by center and gestational age category (\<28 weeks and ≥28 weeks). Follow-up continues to the routine neurodevelopmental assessment at two years' corrected age. Planned project duration: 36 months. Study population: Very preterm infants born \<30+0 weeks of gestation, admitted to a participating Dutch NICU within 24 hours after birth. Intervention: Bilirubin monitoring and phototherapy according to one of two threshold strategies: (1) current Dutch phototherapy thresholds (control) or (2) thresholds from the UK NICE guideline (intervention). Phototherapy is delivered using standard NICU devices. Main study parameters/endpoints: Primary endpoint: survival without NDI at two years' corrected age. NDI is defined as Bayley Scales of Infant and Toddler Development, fourth Edition, Dutch Version (BSID-IV-NL) cognitive and/or motor composite score \<85 and/or hearing impairment and/or visual impairment. Nature and extent of the burden and risks associated with participation, benefit and group relatedness: Both strategies reflect accepted standards of care with routine bilirubin monitoring. Incremental burden consists mainly of additional registration (phototherapy use, bilirubin sampling, skin-to-skin contact, temperature instability), parental questionnaires and, in selected centers, collection of stress-related biomarkers from urine, feces, or waste material from routine blood samples to explore the physiological impact of phototherapy. No biobanking for future unspecified research is planned. The investigators will also use routinely collected and stored monitor data to assess sleep (sleep-wake states and sleep fragmentation) in a subset of infants. Neurodevelopmental follow-up at two years corrected age is routine care in Dutch NICUs. Bilirubin levels above thresholds in both groups will be mitigated by routine monitoring and management according to this study protocol. The study is group-related because bilirubin management and potential neurotoxicity thresholds are specific to very preterm infants.

Neonatal hyperbilirubinemia is a common condition in newborns and is frequently treated with phototherapy. In addition to standard treatment, non-pharmacological interventions such as massage and foot reflexology may help reduce bilirubin levels and improve physiological stability and stress in newborns. This randomized controlled trial aims to evaluate the effects of foot reflexology and body massage on total serum bilirubin levels, physiological parameters (heart rate, respiratory rate, oxygen saturation, and body temperature), and stress levels in neonates receiving phototherapy. A total of 105 newborns will be randomly assigned to three groups: foot reflexology, body massage, and control group. Interventions will be applied before phototherapy sessions, and outcomes will be measured before and after the intervention. The findings of this study are expected to provide evidence for the use of non-invasive complementary methods in reducing bilirubin levels and improving clinical outcomes in newborns.

Neonatal jaundice, or neonatal hyperbilirubinemia, is a common medical issue in the first two weeks of life, causing prolonged hospitalization and readmissions. It results from elevated total serum bilirubin (TSB) and is manifested as yellowish discoloration of the skin, sclera, and mucous membrane. Clinical jaundice appears in about 60% of term neonates and 80% of preterm infants within the first week of life. Pathologic hyperbilirubinemia occurs when bilirubin levels increase by more than 5 mg/dL/day or 0.2 mg/dL/hour, or when jaundice lasts longer than two to three weeks in full-term infants. In preterm infants, unconjugated hyperbilirubinemia is of particular concern due to their permeable blood-brain barrier and underdeveloped brain. Phototherapy is widely used to reduce or prevent the rise of serum unconjugated bilirubin levels and reduce the need for exchange transfusions. However, phototherapy has both immediate and long-term side effects, and it can only decrease accumulated UCB but does not prevent its accumulation. There is a growing potential to explore novel adjuvant treatments to increase bilirubin clearance, decrease phototherapy duration, and decrease exchange transfusion rate.

The goal of this clinical trial is to learn if modified diagnosis and treatment (MDT) of neonatal hemolysis (a common cause to newborn jaundice) incorporated with ETCOc measurement (a non-invasive measurement of exhaled gas) works to prevent brain damage in newborns with severe hyperbilirubinemia (sNH). It will also learn about the. occurrence of cranial MRI in the study participants. The main questions it aims to answer are: * Does MDT lower the possibilities participants have brain damage before the age of one? * How many times of abnormalities in cranial MRI is detected before the age of one? Researchers will compare MDT to a control (a current management) to see if MDT works to prevent brain damage in newborns with sHN. Participants will: * Take MDT or a control method in the management of sNH * Assess if there's brain damage before discharge and at the year of one * Record how many times of abnormalities in cranial MRI is detected before the age of one

The objective of this study is to ascertain the diagnostic threshold of end-tidal carbon monoxide (ETCOc, adjusted for ambient CO levels) within the first three days postpartum, stratified by neonatal age at birth. Additionally, the study aims to evaluate the concordance of the risk range of ETCOc, as measured by non-dispersive infrared spectroscopy, with existing literature, and to assess the reliability of this technology in the management of neonatal hyperbilirubinemia.

Background Neonatal jaundice affects about 60% of full-term newborns in their first week. If untreated, it can lead to permanent brain damage. In Denmark, 2-5% of newborns require phototherapy, the standard treatment. The maximum beneficial irradiance limit for phototherapy remains unclear. Furthermore, studies suggest that cycled phototherapy is as effective as continuous treatment. This study aims to investigate the efficacy of elevating the irradiance of intensive phototherapy treatment regimens. This is to evaluate the dose-response relationship. Furthermore, the study aims to compare intermittent phototherapy to continuous phototherapy. Methods: In a clinical randomized multicenter trial 116 newborns with non-hemolytic hyperbilirubinemia, gestational age \>33+0, weight \>1800g and no other significant neonatal diagnose will be randomized. All infants will receive 12 hours double therapy with a biliblanket and overhead light providing an intensity of either 40-, 55- or 70 µW/cm2/nm. Three groups will be treated with continuous phototherapy while a fourth group will receive intermittent phototherapy of 1,5 hours cycled intervals with an intensity of 70 µW/cm2/nm. Parental experiences during treatment will be examined through a survey post treatment. The study has been approved by the Regional Research Ethics Committee. Perspectives: Understanding the dose-response relationship of phototherapy will give an insight in the most effective way of treating neonatal jaundice. Intermittent therapy, if proven non-inferior, could facilitate more intimacy in the parent-infant relationship as well as benefits in initiating breastfeeding

Early detection and prevention of neonatal encephalopathy using BIND score.

We hypothesized that adopting a lower rather than a higher threshold for phototherapy discontinuation will be associated with reduced rates of rebound hyperbilirubinemia in term and late preterm neonates with hemolytic disease of newborn. Objectives: The investigators aimed to compare the safety of implementing low-threshold, compared to high- threshold, of TSB for phototherapy interruption in term and late preterm neonates with hemolytic disease of newborn.

A randomized Controlled trial comparing the use of transcutaneous bilirubinometry to serum bilirubin measurements (via blooddraws = standard care) in neonates born after a gestational age \> 32 weeks and \< 15 days of age treated with Phototherapy for neonatal hyperbilrubinemia.