Neonatology最新文献

Introduction: Accurate and continuous blood pressure (BP) monitoring in neonates is crucial in the intensive care unit. Invasive arterial lines (IALs), oscillometric cuffs, and current noninvasive continuous BP monitoring devices have significant limitations. The Boppli® device is a novel, continuous, noninvasive BP device that requires no calibration, designed for neonates.

Methods: This prospective, multicenter study evaluated the performance, usability, and safety of the Boppli device in neonates <5 kg. We compared mean arterial pressure (MAP), systolic blood pressure (SBP), and diastolic blood pressure (DBP) measurements from the Boppli with IAL reference values by calculating average values of mean average error (MAE) and standard deviation (SD) for each patient, then averaging those means. Safety and usability were evaluated by analysis of adverse events and survey data, respectively.

Results: The Boppli device demonstrated good performance, meeting the FDA requirements of MAE and SD of the entire cohort: MAE (SD) 0.7 (5.3) mm Hg for MAP, -0.8 (7.7) mm Hg for SBP, and 1.4 (4.7) mm Hg for DBP. Patients with elevated MAPs, Asian ethnicity, and lower extremity IALs were the subgroups with MAE >±5 mm Hg. Various subgroups had SDs >8 mm Hg attributed to low sample sizes. The device received high usability scores from clinicians and parents. No serious adverse events were reported.

Conclusion: The Boppli device is a promising alternative for continuous noninvasive BP monitoring in neonates, offering good accuracy and usability. The device, which received 510(k) clearance in September 2023, was well received by clinicians and parents, with a low-risk profile.

Background: Sensory capacities of the fetus and newborn are still incompletely known. This paper delineates the history of understanding and evidence.

Summary: In the 2nd century, Galen propagated the tabula rasa theory comparing newborns to a blank writing tablet, without senses of sight, hearing, taste, or smell. Somatosensory: once the microscope was available, tactile receptors were identified in mid-17th century. But the tabula rasa theory persisted, and physicians maintained until the 1980s that neonates feel no pain. Auditory: the inner ear's development begins at 10 weeks of gestation at the cochlear basis and ends at its apex at 24 weeks. Researchers believed still into the 19th century that the fetus lacked auditory sensitivity. The uterus is not a quiet place, as the fetus hears uterine vessels, maternal voice, peristalsis, diaphragmatic movement, and heartbeat. In 1980, DeCasper proved that newborns preferred hearing their mothers' voice when compared to that of another mother. The evidence is weaker for sounds originating outside the maternal body. Despite little in utero stimulation, the newborn's visual apparatus functions from birth. Infants enter the world with innate perceptual knowledge of the human face. Olfactory: human infants are attracted by the smell of their mother's breast. It took 1,500 years to discard the tabula rasa theory and to grant the newborn full personhood in the 20th century.

Key messages: Fetal sensory organs are developed by mid-gestation. Neonates know their mother's voice and smell, which encourages maternal contact, prudent disinfectant use, and reduced noise in the nursery.

Introduction: Vitamin K deficiency bleeding (VKDB) in newborns is a preventable yet serious condition. Maternal malabsorption, such as in Crohn's disease, may impair transplacental vitamin K transfer, increasing neonatal coagulopathy risk.

Case report: A 32-year-old woman with Crohn's disease and prior bowel resections delivered at 35+3 weeks due to preeclampsia and fetal distress. Her infant developed severe coagulopathy and a hemorrhagic thymic mass. Laboratory results showed elevated INR and PIVKA-II, which improved with vitamin K and plasma. The mother experienced postpartum hemorrhage and coagulopathy, requiring transfusions, embolization, and vitamin K. Both recovered with treatment. At 13 months, the infant showed only mild left-hand weakness and normal development.

Conclusion: This case highlights the risk of neonatal VKDB and maternal bleeding due to undiagnosed maternal vitamin K deficiency. Screening and supplementation should be considered in pregnancies affected by malabsorptive disorders like Crohn's disease.

Introduction: Neonatal linear immunoglobulin A (IgA) bullous dermatosis (NLABD) is a rare, life-threatening, mucocutaneous bullous disorder. The pathogenesis and optimal treatment remain poorly defined and raise critical clinical challenges.

Case presentation: We present a case of a full-term female infant with severe cutaneous and respiratory symptoms due to NLABD. Diagnosis was confirmed by immunofluorescence on the infant's skin biopsy, while IgAs directed against the basement membrane of the skin and mucosa were identified in the mother's milk. The infant fully recovered after nearly 8 weeks of intensive multidisciplinary care, including non-invasive ventilation, nutritional support, wound care, systemic corticoid treatment, and breastfeeding discontinuation.

Conclusion: This case underscores the importance of timely adequate diagnosis and management of this rare and serious condition. Moreover, it adds novel evidence documenting the presence of pathogenic IgAs in breastmilk.

Introduction: Neonatal linear immunoglobulin A (IgA) bullous dermatosis (NLABD) is a rare, life-threatening, mucocutaneous bullous disorder. The pathogenesis and optimal treatment remain poorly defined and raise critical clinical challenges.

Case presentation: We present a case of a full-term female infant with severe cutaneous and respiratory symptoms due to NLABD. Diagnosis was confirmed by immunofluorescence on the infant's skin biopsy, while IgAs directed against the basement membrane of the skin and mucosa were identified in the mother's milk. The infant fully recovered after nearly 8 weeks of intensive multidisciplinary care, including non-invasive ventilation, nutritional support, wound care, systemic corticoid treatment, and breastfeeding discontinuation.

Conclusion: This case underscores the importance of timely adequate diagnosis and management of this rare and serious condition. Moreover, it adds novel evidence documenting the presence of pathogenic IgAs in breastmilk.

Introduction: Moderate and late preterm (MLPT) infants represent a substantial percentage of all preterm infants and frequently need support in the delivery room. Deferred cord clamping (DCC) improves SpO2 and heart rate (HR) stabilization in term infants. However, data on MLPT infants are limited.

Methods: We performed a prospective observational study collecting SpO2 and HR by pulse oximetry in healthy MLPT infants with DDC to construct percentile graphs for the first 10 min after birth.

Results: A total of 96 MLPT infants were monitored for preductal SpO2 and HR, and percentiles were calculated. SpO2 mean was significantly lower for MLPT than for term infants during the first 6 min after birth, and 15% did not achieve SpO2 ≥85% in the first 5 min after birth. HR was significantly lower in MLPT infants in the first 4 min after birth; however, HR consistently remained above bradycardic values (>100 bpm). NICU admission and postnatal complications were not different between MLPT achieving SpO2 ≥85% or not.

Conclusion: MLPT infants with DCC achieved stable SpO2 and HR significantly later, 6 min and 4 min, respectively, than term infants. In addition, 15% of MLPT infants did not achieve SpO2 ≥85% at 5 min after birth. However, admission to the NICU and clinical evolution did not differ from newborns with SpO2 ≥85% at 5 min. Larger studies including long-term follow-up are needed to assess if lower SpO2 in the first 5 min has clinical consequences in non-resuscitated MLPT.

Introduction: There is a broad awareness of shifts in the oxygen hemoglobin dissociation (ODC) relationship associated with fetal hemoglobin (HbF) changes. However, quantification of the shift has been limited. Aim was to quantify the shift of partial oxygen tension (PO2) associated with HbF and with changes after transfusion of adult erythrocytes (TAE) in preterm infants.

Methods: This is a single-center, retrospective observational analysis of blood gas samples. The shifts of ODC and PO2 related to HbF were evaluated in two models. Either HbF or TAE status (0, 1, ≥2) were used as the independent variable. Multivariate analysis was used to correct for confounding effects (gestational age, postnatal age, source of blood gas sample as well as pH, SO2, and PCO2).

Results: There were 3,452 blood gas observations analyzed from 2,464 infants whose median gestational age was 334 weeksdays (IQR 296-363). With SpO2 between 90 and 95%, the ODC was shifted to the left (13 mm Hg, 1.3 kPa). After adjusting for confounding variables, the number of TAEs (0, 1, ≥2), was highly significantly related to a shift (p < 0.001), consistent with the percent HbF level (p < 0.001). Based on the multivariate model (i.e., holding confounding parameters constant), with a SpO2 of 92% the PaO2 could be expected to shift markedly higher with 2 or more TAEs in an extremely preterm infant (7.3 mm Hg, 0.97 kPa).

Conclusion: While preliminary, these data suggest that in vulnerable preterm infants a change to a slightly lower SpO2 target range following TAE could maintain equivalent PaO2 exposure.

Introduction: Delaying clamping of the umbilical cord (deferred cord clamping [DCC]) in preterm infants reduces mortality and the need for blood transfusions. The mechanisms leading to these benefits are not well understood. The TITANS study investigates potential mediators of the reduction in blood transfusions in infants who received DCC.

Materials and methods: Additional patient data was sourced from Australian and New Zealand sites from the Australian Placental Transfusion Study (APTS). APTS randomized preterm infants <30 weeks' gestation to receive DCC (60 s) or immediate cord clamping. We examined whether placental transfusion or initial severity of illness mediated the reduced requirement for blood transfusions for infants randomized to DCC. Peak hematocrit in the first 7 days (Hct) was used as an indicator of placental transfusion quantity. Cumulative blood sampled, mechanical ventilation, and arterial sampling lines were used as indicators of severity of illness. We quantified the natural indirect effect of peak Hct and then for all mediators in a joint model with sequential mediation.

Results: Data from 1,260 (of 1,401) Australian and New Zealand APTS infants were obtained. The effect of DCC on subsequent blood transfusion was mediated through peak Hct (indirect effect OR = 0.85, 95% CI: 0.79-0.93; p < 0.001), which accounted for 37% of the total effect. Indicators of severity of illness did not mediate the effect independently of peak Hct.

Conclusion: Peak Hct mediated some, but not all, of the effect of DCC on blood transfusion, whereas markers of severity of illness were not independent mediators.

Introduction: Congenital anomalies (CAs) are a major cause of newborn mortality and long-term disabilities, especially in developing countries. Research on CAs is limited and inconclusive. This umbrella review evaluates the pooled prevalence, patterns, and determinants of CAs among newborns in low- and middle-income countries.

Methods: We conducted a comprehensive search across databases, including PubMed and Cochrane Library, until 31 December 2024. Study quality was assessed using the AMSTAR checklist. Heterogeneity was measured with the I2 test and Cochrane Q test, while publication bias was evaluated through funnel plots, Egger's, and Begg's tests. The pooled prevalence of CAs and determinants was calculated using the DerSimonian and Laird random-effects model.

Results: Seven studies revealed a pooled prevalence of CAs at 15 per 1,000 births (95% CI: 9.00, 21.00), with the highest rate in low-income countries at 18 per 1,000 (95% CI: 8.00, 27.00). Musculoskeletal and urogenital anomalies were the most prevalent, at 8 and 4 per 1,000 births, respectively. Key predictors include lack of folic acid supplementation (AOR 4.18, 95% CI: 2.35, 6.02), kchat chewing (AOR 3.5, 95% CI: 2.97, 4.03), maternal illness (AOR 3.55, 95% CI: 3.37, 4.73), and drug use during pregnancy (AOR 4.37, 95% CI: 1.21, 7.54).

Conclusion: The pooled prevalence of CAs is significantly higher than WHO reports, with musculoskeletal and urogenital defects being the most common. Key risk factors include maternal illness, unidentified drug use, kchat chewing, and lack of folic acid supplementation. Enhancing folic acid intake and targeting these risk factors are essential for policymakers.