Judicious Transfusion of Platelets Among Neonates: A Systematic Review.

In newborns, especially premature babies, there is a high association between thrombocytopenia and bleeding, particularly intraventricular hemorrhage, which may be due to immaturity. It was usual clinical practice that neonates should be transfused with higher platelet counts than older children or adults to reduce their risk of bleeding. However, after keen observations, we noticed that bleeding and mortality were more common in newborns who received more platelet transfusions. The mechanisms underlying the adverse effects of platelet transfusions in neonates may be due to higher antigenicity and immunological factors. We know that neonatal platelets are hyporeactive; this hyporeactivity is balanced by factors in the neonatal blood that promote coagulation, such as increased hematocrit, von Willebrand factor, and fibrinogen, which, on balance, leads to normal primary neonatal hemostasis. Platelets are very similar to adults in number, but functional capabilities were less, and for the reasons mentioned above, particularly bleeding time was short. Theologically, neonatal platelet lifespan was high to compensate for less production. We started this review because we observed that many babies were not having bleeding symptoms in some instances of severe thrombocytopenia. Many well-active babies are receiving unnecessary transfusions, as human blood is precious, and many young neonatologists are going on protocol-based excessive transfusions. This stimulated us to write a review.

Case Report: resolution of refractory seizures after neurosurgical intervention in newborns with cerebral extra-axial hemorrhages.

Introduction: Intracranial hemorrhage is a significant cause of neurological damage in newborns. Extra-axial hemorrhages with intraparenchymal extension can precipitate acute clinical deterioration. Seizures are one of the presenting symptoms, which can be refractory to treatment. These hemorrhages can result in considerable long-term morbidity and mortality. Aim: The objective of this report was to present three cases of extra-axial hemorrhages in neonates, all exhibiting refractory seizures that resolved after neurosurgical intervention. In addition, a review of literature is provided. Methods: Data collected included clinical history, laboratory findings, neuroimaging studies, type of neurosurgical intervention, and patient outcome. All infants presented with extra-axial hemorrhages along with clinical and radiological signs of increased intracranial pressure within the first 6 days of life. These manifestations included a decreased level of consciousness, hypertension, bradycardia, and cerebral midline shift on imaging. Refractory seizures were present in all cases. Urgent magnetic resonance imaging was performed followed by neurosurgical intervention (two needle aspirations, one cranial trepanation), leading to amelioration of clinical symptoms and complete resolution of seizures. Follow-up outcomes included normal psychomotor development in one infant, mild cerebral paresis in another, and delayed motor development in the third. None of the infants developed epilepsy. Conclusion: This study underscores the critical importance of monitoring seizure activity, conducting urgent and appropriate imaging, and implementing targeted neurosurgical intervention, preferably through minimally invasive methods such as percutaneous needle aspiration. Clinicians should be aware of this clinical picture and respond promptly to mitigate neurological damage.

Association of vitamin A with gestational diabetes and thyroid disorders in pregnancy and their influence on maternal, fetal, and neonatal outcomes.

Gestational diabetes mellitus (GDM) and thyroid disorders during pregnancy pose significant health concerns, impacting a substantial number of mothers globally. Globally, about 14% of pregnant women develop GDM, while thyroid disorders impact approximately 2%-3%. Both conditions contribute to adverse outcomes, including gestational hypertension, excessive fetal growth, and heightened perinatal morbidity. The central focus of this literature review is to examine the relationship between vitamin A, a crucial fat-soluble micronutrient in fetal development, and the occurrence of GDM and thyroid disorders during pregnancy. The primary research question investigates the association between vitamin A, GDM, and thyroid disorders, analyzing their combined impact on maternal, fetal, and neonatal outcomes. The review underscores the potential of vitamin A to modulate the risk and outcomes of GDM and thyroid disorders during gestation, emphasizing its role in GDM development and resolution and its influence on thyroid function in pregnancy.

Unruptured Myelomeningocele Closure Surgery: A Case Report.

Myelomeningocele (MMC) is an in-utero closure defect of the posterior portion of the neural tube, and it is the most common neural tube defect (NTD) compatible with life. It is usually associated with other congenital malformations, such as hydrocephalus and Chiari type 2 syndrome. Therefore, the long-term outcome depends on early repair, and the surgery is urgently scheduled. Newborns with MMC are a special population that requires meticulous preoperative preparation to maintain hemodynamic stability during the procedure and a favorable outcome. In this case report, we describe the challenges of unruptured myelomeningocele closure surgery in a newborn with 12 hours of life. This special case emphasizes the importance of a multidisciplinary approach between anesthesiologists, neurosurgeons, and plastic surgeons to provide the best care to this subset of patients.

Is it useful to wash stored red blood cells in cardiopulmonary bypass priming fluid for neonatal cardiac surgery? A single-centre retrospective study.

BACKGROUND AND OBJECTIVES: Neonatal cardiac surgery requires careful consideration of cardiopulmonary bypass (CPB) priming fluid composition due to small blood volume and immature physiology. This study investigated the impact of allogeneic stored red blood cells (RBCs) processed using an autotransfusion system in CPB priming fluid for neonates. MATERIALS AND METHODS: We compared perioperative parameters, inflammatory mediators, coagulation indicators, vasoactive-inotropic score (VIS) and clinical outcomes between neonates receiving unwashed (n = 56) and washed (n = 45) RBCs in CPB priming fluid. Regression models were used to assess the independent association between RBC washing and patient outcomes. RESULTS: The autotransfusion system improved stored RBC quality. The washed group showed higher peak haematocrit (p < 0.01) and haemoglobin levels (p = 0.04) during CPB, an increased oxygen delivery index during rewarming (p < 0.05) and lower postoperative lactate levels and VIS (p < 0.05). Inflammatory (IL-6, IL-8 and IL-10) and coagulation parameters (D-dimer, fibrinogen and fibrin degradation product) fluctuated compared with baseline but did not significantly differ between groups. The washed group had a lower incidence of hyperlactacidaemia and delayed sternal closure at CPB weaning. CONCLUSIONS: Adding washed allogeneic stored RBCs to neonatal CPB priming fluid reduced postoperative lactate elevation and VIS without early improvement in the inflammatory and coagulation systems.

Large transethmoidal meningoencephalocele in a neonate involving three discrete defects in lamina cribriform: A case report.

Background: Intranasal meningoencephaloceles are rarely encountered in pediatric neurosurgery. The symptoms and clinical features may mimic those of nasal polyps or dermoid cysts. Transethmoidal meningoencephalocele is a rare congenital meningoencephalocele of the anterior skull base with diverse clinical presentation. The appropriate surgical intervention is chosen according to the meningoencephalocele type and location. Radiological examinations such as computed tomography and magnetic resonance imaging are helpful for the differential diagnosis of the encephalocele sac and localization of the cranial bone defect. Case Description: We are reporting a case of basal meningoencephalocele of the transethmoidal type, which was discovered in a 20-day-old boy presenting with cerebrospinal fluid rhinorrhea, respiratory distress, difficulty in feeding, and meningitis. The preoperative images showed a large herniated intranasal sac with bony discontinuity of the cribriform plate; however, three discrete defects of the cribriform plate with their related discrete herniated sacs were identified intraoperatively. Two staged surgeries were performed in succession: transcranial to separate the sacs from the cranial cavity and seal the anterior fossa floor, followed by transnasal to remove the remnant of the intranasal sacs. Patient symptoms and signs markedly improved after the surgeries. Conclusion: We highlight the need for urgent intervention at a very young age if the clinical presentation mandates, and also the importance of meticulous intraoperative identification of all bony and dural defects that might be missed in preoperative images to ensure complete repair and prevent recurrence.

Combination of comprehensive thermal care and detail-oriented nursing care in the operating room for managing gestational diabetes mellitus.

BACKGROUND: As the incidence of gestational diabetes mellitus (GDM) increases, its impact on cesarean sections has attracted widespread attention. Omni-directional, insulated care and detailed care are of great significance in this patient population, as they can effectively improve the quality of care in the operating room. AIM: To explore the effect of the integrated use of comprehensive thermal insulation. METHODS: Women with GDM who underwent cesarean sections at our hospital between April 2023 and February 2024 were included in this retrospective study. The participants were randomly allocated to two groups: The observation and control groups. An all-around thermal insulation nursing strategy, including preoperative, intraoperative, and postoperative temperature maintenance, was adopted. In addition, detailed nursing care measures, such as blood glucose monitoring, wound care, and psychological counseling, were implemented in the observation group. RESULTS: Comparative observation revealed that all-around thermal insulation care can effectively prevent the incidence of maternal hypothermia caused by surgery, reduce the risk of infection, and promote blood circulation. The implementation of detailed care improved maternal satisfaction and reduced the incidence of complications via the appropriate management of fluctuations in the blood glucose levels and optimization of the nursing process before and after surgery according to the patient's characteristics. CONCLUSION: The application of a combination of comprehensive thermal insulation and detailed nursing care improved the overall quality of perioperative care.

Birth in the Operating Room for Immediate Cardiac Surgery: A Rare but Effective Strategy.

Background: With significant advancements in fetal cardiac imaging, patients with complex congenital heart disease (CHD) carrying a high risk for postnatal demise are now being diagnosed earlier. We sought to assess an interdisciplinary strategy for delivering these children in an operating room (OR) adjacent to a cardiac OR for immediate surgery or stabilization. Methods: All children prenatally diagnosed with CHD at risk for immediate postnatal hemodynamic instability and cardiogenic shock who were delivered in the operating room (OR) between 2012 and 2023 in which the senior author was consulted were included. Results: Eight patients were identified. Six (75%) patients were operated on day-of-life zero, all requiring obstructed total anomalous pulmonary venous return (TAPVR) repair. Of these six patients, 2 (33%) required a simultaneous Norwood procedure, 2 (33%) required pulmonary artery unifocalization and modified Blalock-Taussig-Thomas shunt, and 2 (33%) patients had repair of obstructed mixed TAPVR. The remaining 2 patients potentially planned for immediate surgery had nonimmune hydrops fetalis and went into cardiogenic shock at 12 and 72 hours postnatally, requiring a novel Norwood procedure with left-ventricular exclusion for severe aortic/mitral valve insufficiency. The median ventilation and inpatient durations were 19 [IQR: 11-26] days and 41 [IQR: 32-128] days, respectively. Three(38%) patients required one or more in-hospital reoperations. Subsequent staged procedures included Glenn (n = 5), Fontan (n = 3), biventricular repair (n = 2), ventricular assist device placement (n = 1), and heart transplant (n = 1). Median follow-up was 5.7 [IQR:1.3-7.8] years. The five-year postoperative survival was 88% (n = 7/8). Conclusion: While children with these diagnoses have historically had poor survival, the strategy of birth in the OR adjacent to a cardiac OR where emergent surgery is planned is a potentially promising strategy with excellent clinical outcomes. However, this is a high-resource strategy whose feasibility in any program requires thoughtful assessment.

A Comprehensive Consolidation of Data on the Relationship Between Surfactant Protein-B (SFTPB) Polymorphisms and Susceptibility to Bronchopulmonary Dysplasia.

BACKGROUND: This meta-analysis aims to evaluate the potential link between common variations in the Surfactant Protein-B (SFTPB) gene and the risk of bronchopulmonary dysplasia (BPD) in preterm neonates. METHODS: All pertinent articles published prior to February 1, 2024, in PubMed, Web of Science, EMBASE, CNKI, and Scopus databases were reviewed. RESULTS: Nineteen case-control studies involving 1149 BPD cases and 1845 non-BPD controls, were analyzed. Combined data indicated a significant link between SFTPB -18 A > C and Intron 4 VNTR polymorphisms with increased BPD susceptibility, while the 1580 C > T polymorphism provides a protective impact on BPD initiation. CONCLUSIONS: Pooled data indicated a significant association between SFTPB -18 A > C and Intron 4 VNTR polymorphisms with increased BPD risk, whereas the 1580 C > T polymorphism confers protection. These findings suggest a genetic susceptibility to BPD, underscoring the complex interplay of different genetic elements in its development.

Highlights of the 18th International Conference on Pediatric Mechanical Circulatory Support Systems and Pediatric Cardiopulmonary Perfusion.

The 18th International Conference on Pediatric Mechanical Circulatory Support Systems and Pediatric Cardiopulmonary Perfusion was held in Milwaukee, WI, USA, on May 9 and 10, 2024. The conference was hosted by the Herma Heart Institute of Children's Wisconsin at the Pfister Hotel in downtown Milwaukee. This communication provides the highlights of the proceedings.

Effectiveness of facilitated tucking on reducing pain during heel stick in neonates: a randomized controlled experimental study.

Background: Pain in neonates is associated with adverse neurodevelopmental outcomes in the later days of life. Facilitated tucking is a nonpharmacological method of pain relief. The study aims to compare the effect of facilitated tucking in pain reduction in neonates. Materials and methods: This was a randomized controlled experimental study conducted in the neonatal ward of a tertiary care center. There were 25 neonates randomized each in the experimental and control groups (total of 50), based on computer-generated random tables. The experimental group was placed in a facilitated tucking position during heel stick, while the control group was kept in the usual position, as done routinely. A self-structured questionnaire and Neonatal Infant Pain Scale were used. The main outcome measures were the mean Neonatal Infant Pain Scale score, and change in preprocedure and postprocedure heart rate and oxygen saturation in the two groups. Ethical clearance and informed written consent were sought. Results: Neonates in the experimental group had significantly lesser pain (less Neonatal Infant Pain Scale score) than the neonates in the control group (P<0.001). There was also a significant increment in the mean heart rate and a decrease in the oxygen saturation after the procedure in the control group, indicating significantly more pain perception (P<0.001) in the control group. Conclusions: Facilitated tucking was found to be effective in reducing the pain during heel stick procedures in neonates.

A Novel Steroidogenic Acute Regulatory Protein (StAR) Mutation Causing Adrenal Insufficiency in a Neonate: A Case Report of a Rare Medical Condition.

Congenital lipoid adrenal hyperplasia is a very rare and severe cause of adrenal insufficiency. It occurs due to a mutation of the steroidogenic acute regulatory protein (StAR), disrupting adrenal steroid biosynthesis. Here, we report a case of a three-week-old female infant with vomiting, failure to thrive, electrolyte imbalance, and generalized hyperpigmentation. The hormonal assay and genetic diagnosis confirmed a mutation in the StAR protein, leading to adrenal insufficiency. Appropriate replacement therapy resulted in the resolution of clinical and biochemical abnormalities. This case is being reported for its rare etiology and diagnostic clues. It can guide clinicians to keep adrenal insufficiency as a differential diagnosis in a neonate presenting with hyperpigmentation and electrolyte disturbance to save lives.

Invasive Mucinous Adenocarcinoma in a Newborn With Antenatally Diagnosed Congenital Pulmonary Airway Malformation: A Case Report.

Congenital pulmonary airway malformations (CPAMs) are rare multicystic lung lesions typically diagnosed antenatally. We present a case of a term female neonate with antenatally diagnosed CPAM who required pleuro-amniotic shunting at 22 weeks of gestation. The patient was born with a right-sided pneumothorax and severe cardiorespiratory distress, necessitating extracorporeal membrane oxygenation (ECMO). Chest CT confirmed CPAM, revealing multiple cystic lesions in the right middle lobe and a significant contralateral mediastinal shift. On the second day of life, while on ECMO, the patient underwent a right middle lobectomy and an upper lobe anterior segmentectomy via a posterolateral thoracotomy. Post-surgery cardiac CT showed narrowing of the left pulmonary artery, although a perfusion study indicated normal left lung perfusion. Histopathological examination identified CPAM type 1 with invasive mucinous adenocarcinoma (IMA; stage 1: pT1b), featuring low-to-intermediate cellularity and KRAS G12D mutations. The invasive mucinous component measured at least 15 mm but did not invade the visceral pleura. After a gradual weaning process, the patient was successfully extubated and discharged home after 70 days. To our knowledge, this is the first reported case of CPAM type 1 with IMA that underwent pleuro-amniotic shunting in the second trimester.

Association of Lung Ultrasound Scores With Different Modes of Respiratory Support and Clinical Outcomes: An Observational Study in a Tertiary Care Neonatal Unit.

BACKGROUND: Lung ultrasound (LUS) is an evolving point-of-care tool in the neonatal intensive care unit. LUS score has been evaluated in adults as well as in neonates to characterize and diagnose various respiratory conditions. Recently, the LUS score has been evaluated for predicting clinical respiratory outcomes in neonates. OBJECTIVE: To assess the association between LUS score and various modes of respiratory support and clinical outcomes among neonates presenting with respiratory distress. METHODS: In this prospective, cross-sectional, observational study done in a tertiary care neonatal unit, the LUS score was calculated within three hours of receiving respiratory support. Subsequently, the LUS score was assigned with each escalation and de-escalation of respiratory support. Maximum LUS scores for each clinical outcome were also recorded. Inter-rater agreement was determined with the intraclass correlation coefficient. RESULT: A total of 162 LUS scans were performed in 65 babies with a mean gestation of 32.4 ± 3.7 weeks and median (IQR) birth weight of 1480 (1130-2000) grams. The LUS scores (median (IQR)) of babies on continuous positive airway pressure (CPAP), noninvasive positive pressure ventilation (NIPPV), and mechanical ventilation (MV) were 4 (3-6.5), 9 (8-11), and 12 (11-13.5), respectively (p-value < 0.001). The difference in maximum median LUS scores between different clinical outcomes was statistically significant, with a p-value < 0.001. LUS score had an excellent inter-rater agreement (intraclass correlation coefficient = 0.998; p-value < 0.001). CONCLUSION: There is an association between LUS score and different modes of respiratory support with scores increasing as the level of support increased. LUS score was also found to be related with clinical outcomes like death, extubation failure, and recovery, which could help in predicting the prognosis.

Parental Autonomy in the Care of Premature Newborns and the Experience of a Neonatal Team: Observational Prospective Study.

Background: The European Foundation for the Care of Newborn Infants (EFCNI) has promoted the importance of parental involvement in the care of children. Objective: The study aimed to examine how the time required by parents to achieve autonomy in the care of their very low-birth weight newborn infants was modified during the implementation of a training program. Methods: This was an observational prospective study in the context of a quality improvement initiative. The Cuídame (meaning "Take Care of Me" in English) program was aimed at achieving parental autonomy. It was implemented over 2 periods: period 1, from September 1, 2020, to June 15, 2021; and period 2, from July 15, 2021, to May 31, 2022. The days required by parents to achieve autonomy in several areas of care were collected from the electronic health system. Results: A total of 54 and 43 families with newborn infants were recruited in periods 1 and 2, respectively. Less time was required to acheive autonomy in period 2 for participation in clinical rounds (median 10.5, IQR 5-20 vs 7, IQR 4-10.5 d; P<.001), feeding (median 53.5, IQR 34-68 vs 44.5, IQR 37-62 d; P=.049), and observation of neurobehavior (median 18, IQR 9-33 vs 11, IQR 7-16 d; P=.049). More time was required to achieve autonomy for kangaroo mother care (median 14, IQR 7-23 vs 21, IQR 10-31 d; P=.02), diaper change (median 9.5, IQR 4-20 vs 14.5, IQR 9-32 d; P=.04), and infection prevention (median 1, IQR 1-2 vs 6, IQR 3-12; P<.001). Conclusions: Parents required less time to achieve autonomy for participation in clinical rounds, feeding, and observation of neurobehavior during the implementation of the training program. Nevertheless, they required more time to achieve autonomy for kangaroo mother care, diaper change, and infection prevention.

Early Neonatal Mortality and Predictors in Newborns Admitted to the Neonatal Intensive Care Unit at Public Hospitals in Hadiya Zone, Central Ethiopia: A Retrospective Cohort Study.

Background. Despite numerous life-saving measures, neonatal mortality remains high. This research aims to investigate the incidence and predictors of early neonatal mortality among newborns admitted to intensive care units in public hospitals in Hadiya Zone, Ethiopia. Methods. A retrospective cohort study was conducted on 689 neonates admitted to the neonatal intensive care unit. Cox proportional hazard regression by STATA was used. Results. This study followed for 3439 person-days found an incidence rate of 16.9 deaths per 1000 person-days. Birth weight [AHR = 4.4, 95% CI; 1.29, 14.94], APGAR score at the fifth minute 4 to 6 [AHR = 0.42, 95% CI; 0.2, 0.87], hypoglycemia [AHR = 8.1, 95% CI; 2.17, 30.43], no treated with oxygen [AHR = 2.6, 95% CI; 1.1, 5.9], and obstetric complications [AHR = 0.41, 95% CI; 0.18, 0.93] predicted early neonatal mortality. Conclusion. The study revealed a high neonatal mortality rate, necessitating increased focus on oxygen treatment for newborns and improved early diagnosis and treatment of obstetric complications.

A nationwide survey on the management of neonatal respiratory distress syndrome: insights from the MUNICH survey in 394 Chinese hospitals.

BACKGROUND: At present, preterm infants with respiratory distress syndrome (RDS) in China present higher mortality and morbidity rates than those in high-income countries. The aim of this nationwide survey was to assess the clinical management of RDS in China. METHODS: A nationwide cross-sectional survey to assess adherence to RDS management recommendations was performed. One neonatologist per hospital was randomly selected. The primary outcome was the key care of RDS management. RESULTS: Among the 394 participating hospitals, 88·3% were birthing centres. The number of doctors and nurses per bed were 0·27 and 0·72, respectively. Antenatal corticosteroids (any dose) were administered to 90% of the women at risk of preterm birth at < 34 weeks of gestation (90·0% inborn vs. 50·0% outborn, p < 0·001). The median fraction of inspired oxygen (FiO2) for initial resuscitation was 0·30 for babies born at ≤ 32 weeks of gestation and 0·25 for those born at > 32 weeks. T-piece resuscitators were available in 77·8% of delivery rooms (DRs) (tertiary hospitals: 82·5% vs. secondary hospitals: 63·0%, p < 0·001). Surfactant was used in 51·6% of the DRs. Less invasive surfactant administration (LISA) was used in 49·7% of the hospitals (tertiary hospitals: 55·3% vs. secondary hospitals: 31·5%, p < 0·001). Primary non-invasive ventilation was initiated in approximately 80·0% of the patients. High-frequency oscillation ventilation was primarily reserved for rescue after conventional mechanical ventilation (MV) failure. Caffeine was routinely used during MV in 59·1% of the hospitals. Bedside lung ultrasonography was performed in 54·3% of the health facilities (tertiary hospitals: 61·6% vs. secondary hospitals: 30·4%, p < 0·001). Qualified breast milk banks and Family Integrated Care (FICare) were present in 30·2% and 63·7% of the hospitals, respectively. CONCLUSIONS: Significant disparities in resource availability and guidelines adherence were evident across hospitals. Future strategies should address DR facilities and medication access, technical training, staff allocation, and ancillary facility development for a better management of RDS patients in China.

Antimicrobial susceptibility profiles of invasive bacterial infections among children from low- and middle-income countries in the Western Pacific Region (WPRO) - a systematic review and meta-analysis.

Background: Antimicrobial resistance increasingly impacts paediatric mortality, particularly in resource-constrained settings. We aimed to evaluate the susceptibility profiles of bacteria causing infections in children from the Western Pacific region. Methods: We conducted a systematic review and meta-analysis of bacteria responsible for common infections in children. We included studies published from January 2011 to December 2023 (PROSPERO CRD42021248722). Pooled susceptibilities were evaluated against empiric antibiotics recommended to treat common clinical syndromes. Findings: Fifty-one papers met inclusion criteria, incorporating 18,330 bacterial isolates. Of available published data, only six countries from the region were represented. Escherichia coli revealed a pooled susceptibility to ampicillin of 17% (95% CI 12-23%, n = 3292), gentamicin 63% (95% CI 59-67%, n = 3956), and third-generation cephalosporins 59% (95% CI 49-69%, n = 3585). Susceptibility of Klebsiella spp. to gentamicin was 71% (95% CI 61-80%, n = 2323), third-generation cephalosporins 35% (95% CI 22-49%, n = 2076), and carbapenems 89% (95% CI 78-97%, n = 2080). Pooled susceptibility of Staphylococcus aureus to flucloxacillin was 72% (95% CI 58-83%, n = 1666), and susceptibility of Streptococcus pneumoniae meningitis isolates to ampicillin was 26% (95% CI 11-44%, n = 375), and 63% (95% CI 40-84%, n = 246) to third-generation cephalosporins. Interpretation: The burden of antimicrobial resistance among bacteria responsible for common infections in children across the Western Pacific region is significant, and the currently recommended World Health Organization antibiotics to treat these infections may be inefficacious. Strategies to improve the availability of high-quality data to understand the burden of antimicrobial resistance in the region are necessary. Funding: The study was supported by an Australian GovernmentNational Health and Medical Research Council Investigator Grant. This research was funded in part by the Wellcome Trust [220211/Z/20/Z]. For the purpose of Open Access, the author has applied a CC BY public copyright licence to any Author Accepted Manuscript version arising from this submission.

Ultrasonographic Assessment of the Thymus Among Neonates Admitted in a Special Newborn Care Unit of a Medical College Hospital in Eastern India.

INTRODUCTION: The thymus is essential for the maturation of T-lymphocytes, crucial for adaptive immunity. In neonates, thymic development is influenced by factors such as gestational age, birth weight, birth length, etc. Ultrasonography offers a non-invasive method to assess thymic size and morphology. However, there is limited research on thymic ultrasonography among neonates in Eastern India. This study aimed to investigate the ultra-sonographic characteristics of the thymus in neonates admitted to a Special Neonatal Care Unit (SNCU) in Eastern India and its correlation with certain clinical and anthropometric variables. MATERIALS AND METHODS: Conducted from May to July 2024, this cross-sectional observational study involved 80 neonates admitted to the SNCU at the College of Medicine & Sagore Dutta Hospital. Thymic ultrasonography, using an Esaote MylabX7 ultrasound machine with a 3-11 MHz linear probe (Esaote, Genoa, Italy), measured thymic length, width, anteroposterior (AP) dimension, sagittal area, and thymic index. Clinical data, including gestational age, birth weight, birth length, and antibiotics received, were collected from medical records. Pearson's correlation coefficient and linear regression analysis were used to examine correlations and predictors of thymic dimensions. RESULTS: The cohort consisted of 45 boys (56%) and 35 girls (44%). The average birth weight was 2,626 grams for boys and 2,639 grams for girls. The median gestation period was 38 weeks for both groups. Thymic measurements did not significantly differ by gender. Correlation analysis revealed significant relationships between thymic dimensions and neonatal anthropometric measurements. Birth weight showed a strong positive correlation with thymic length (r = 0.486) and width (r = 0.233). Linear regression identified birth weight as a significant predictor of the thymic index (p < 0.001), explaining 21.2% of the variance. CONCLUSION: This study provides insights into the factors associated with thymic size in neonates, highlighting the critical role of birth weight in thymic development. Future research should explore additional variables influencing thymic size and consider larger sample sizes to enhance model explanatory power and its potential role in immunity.

Utility of interleukin-6 to identify serious bacterial infections in febrile infants aged ≤60 days.

AIM: The aim of this study is to investigate the utility of interleukin-6 (IL-6) in the early diagnosis of serious bacterial infections (SBI) in febrile infants and to compare it with C-reactive protein (CRP). METHODS: Retrospective study conducted in the paediatric emergency department in Gothenburg, Sweden, on previously healthy, full-term infants aged ≤60 days with fever without a source (FWS) from 2014 to 2017. RESULTS: We included 536 infants with FWS, of whom IL-6 was analysed in 364 (68%) and CRP was analysed in 494 (92%). Approximately 70% of the infants presented with a fever duration of less than 12 h. The prevalence of SBIs was 14.8% (95% CI,11.3-18.9) in the IL-6 group and 17.8% (95% CI,14.5-21.5) in the CRP group. The sensitivity, specificity, negative predictive value (NPV), and positive predictive value (PPV) of IL-6 ≥50 ng/L were 93%, 66%, 98% and 33%, respectively. For CRP ≥20 mg/L, the sensitivity, specificity, NPV, and PPV were 76%, 89%, 95%, and 55%, respectively. Logistic regression analysis showed that CRP was significantly associated with SBI (p < 0.0001) in the entire population, whereas IL-6 was not. CONCLUSION: Interleukin-6 showed high sensitivity and NPV, which might assist in identifying SBIs early in febrile infants. However, IL-6 was not shown to be superior to CRP and further studies are needed to investigate whether IL-6 should be incorporated in clinical management.