Deep learning prediction of renal anomalies for prenatal ultrasound diagnosis.

Deep learning algorithms have demonstrated remarkable potential in clinical diagnostics, particularly in the field of medical imaging. In this study, we investigated the application of deep learning models in early detection of fetal kidney anomalies. To provide an enhanced interpretation of those models' predictions, we proposed an adapted two-class representation and developed a multi-class model interpretation approach for problems with more than two labels and variable hierarchical grouping of labels. Additionally, we employed the explainable AI (XAI) visualization tools Grad-CAM and HiResCAM, to gain insights into model predictions and identify reasons for misclassifications. The study dataset consisted of 969 ultrasound images from unique patients; 646 control images and 323 cases of kidney anomalies, including 259 cases of unilateral urinary tract dilation and 64 cases of unilateral multicystic dysplastic kidney. The best performing model achieved a cross-validated area under the ROC curve of 91.28% ± 0.52%, with an overall accuracy of 84.03% ± 0.76%, sensitivity of 77.39% ± 1.99%, and specificity of 87.35% ± 1.28%. Our findings emphasize the potential of deep learning models in predicting kidney anomalies from limited prenatal ultrasound imagery. The proposed adaptations in model representation and interpretation represent a novel solution to multi-class prediction problems.

Threat and adaptation: The maternal lived experience of continuing pregnancy after receiving a prenatal diagnosis of agenesis of the corpus callosum.

One stated objective of prenatal screening and diagnosis is the preparation for delivering a baby with medical needs or disability, however, psychosocial outcomes of parents who received a prenatal diagnosis suggest that this objective is not yet realised. Preparation may be complicated by diagnostic and prognostic uncertainty. A prenatal diagnosis that includes significant uncertainty due to the heterogeneous presentations, classifications, causes and outcomes is agenesis of the corpus callosum. As a neuroanatomical anomaly identified in the second or third trimesters, the diagnosis is likely to cause distress for expectant mothers, yet there is limited guidance for holistic support. To begin to address the paucity of research, this hermeneutic phenomenological study sought to explore, and provide a telling of the maternal experience of continuing pregnancy after a prenatal diagnosis of agenesis of the corpus callosum. Through interviews and a series of online, asynchronous and facilitated focus groups, lived experiences during pregnancy from the time of diagnosis to birth were explored with 26 mothers who participated in this international study. Themes were constructed through reflexive thematic analysis to describe the experience of the lived phenomenon. The first theme, Under Threat, included subthemes of The Threat to the Life of the Baby and Threatened Image of the Expected Family. The second theme, Day to Day Toward Adaptation, included subthemes of Holding it Together and Falling Apart, and More Than Information, Searching for Meaning, Hope and Control. To realise the commonly stated objective of prenatal diagnosis, to support maternal preparation, healthcare professionals require awareness of the profound, yet individual experience of prenatal diagnosis to adequately respond and support mothers through their continued pregnancies. Healthcare services should be designed to flexibly respond in a woman- and family-centred manner to reduce the threat and support maternal adaptation after a prenatal diagnosis.

A practical method for prenatal diagnosis of anal atresia by second trimester ultrasound screening - A retrospective study.

OBJECTIVES: The study aimed to demonstrate the performance of anal atresia ultrasound screening in the second trimester and to describe associated experiences in a primary care fetal medicine clinic. MATERIALS AND METHODS: We retrospectively analyzed the medical records of fetuses who underwent a second-trimester screening at the Taiji clinic between November 2019 and May 2022. Fisher's exact test was conducted to investigate potential risk factors. RESULTS: There were 28 459 fetuses screened in our clinic during the study period; eventually, 6 cases were diagnosed with anal atresia after birth. The incidence of anal atresia in our sample was 2.11 in 10 000. Based on our findings, potential risk factors significantly associated with anal atresia included: multiple pregnancies (p-value = 0.0185) and in-vitro fertilization (p-value = 0.038). Half of the anal atresia cases were associated with abnormalities affecting other organ systems, most frequently the genitourinary system (66.7%) and cardiovascular system (66.7%), especially persistent left superior vena cava (2 cases). CONCLUSION: Anal atresia is a malformation that requires extensive care; the clinical management after the prenatal discovery of its signs should include testing for chromosomal abnormalities and close monitoring of the amniotic fluid volume. Therefore, prenatal ultrasound screening for anal atresia in the second trimester is critical, particularly in the cases of multiple and IVF pregnancies, and multiple abnormalities. The fetuses with ultrasound signs of anal atresia should be followed at a later gestational period and referred to a specialized institution for postnatal management planning and parental counseling.

Development of the prosencephalic structures, ganglionic eminence, basal ganglia and thalamus at 11 + 3 to 13 + 6 gestational weeks on 3D transvaginal ultrasound including normative data.

OBJECTIVES: To show the development of ganglionic eminence, basal ganglia and thalamus/hypothalamus in week 11 + 3 to 13 + 6 by transvaginal 3D ultrasound. METHODS: To visualize the prosencephalic structures surrounding the 3rd ventricle, 285 three-dimensional ultrasound volume blocks from 402 fetuses examined were selected in a prospective transvaginal 3D study to compare ultrasound images of ganglionic eminence, basal ganglia, thalamus/hypothalamus with embryological sections. In addition, measurements of the described structures were made in 104 fetuses to quantify the embryological development. RESULTS: The sonomorphologic characteristics of ganglionic eminence, basal ganglia and thalamus/hypothalamus are described in 71% of the fetuses examined. Measurements of the structures in 57% of the fetuses, show the following results: axGE ap = 0.17 + 0.112*CRL; axGE/I = 0.888 + 0.048*CRL; axGE/BG = 0.569 + 0.041*CRL; coGE/BG = 0.381 + 0.048*CRL; coTh lat = - 0.002 + 0.135*CRL; coTh/HyT = 3.68 + 0.059*CRL; co3.V lat = 0.54 + 0.008*CRL. CONCLUSION: Transvaginal 3D neurosonography allows visualization and measurement of normal structures in the fetal prosencephalon at 11 + 3 to 13 + 6 weeks of gestation (GW) including details of ganglionic eminence (GE), basal ganglia (BG), and thalamus/hypothalamus (Th/HyT). Further scientific work is needed before using the results to decide on pathological changes in patients.

Diagnostic Value and High-Risk Factors of Two-Dimensional Ultrasonography Combined with Four-Dimensional Ultrasonography in Prenatal Ultrasound Screening of Fetal Congenital Malformations.

Objective: This study mainly analyzes the diagnostic value of two-dimensional ultrasonography (2D-US) combined with four-dimensional ultrasonography (4D-US) in prenatal ultrasound screening of fetal congenital malformations (CMs) and explores the high-risk factors affecting fetal malformations. Methods: The clinical and imaging data of 2247 pregnant women who underwent prenatal fetal malformation screening in the General Hospital of Ningxia Medical University between February 2020 and October 2021 were collected and analyzed, retrospectively. All pregnant women underwent 2D-US, and those with suspected fetal malformations were further inspected by 4D-US. The accuracy of ultrasound examination results relative to actual pregnancy outcomes was analyzed, taking the neonatal malformation after induced labor or actual delivery as the gold standard, and the risk factors influencing the occurrence of fetal malformations were discussed. Results: A total of 87 cases (3.87%) of fetal malformations were detected out of the 2247 parturients examined. The accuracy, sensitivity, and specificity of 2D-US diagnosis were 81.40%, 43.68%, and 82.92%, respectively, while the data were 83.67%, 51.72%, and 84.95% for 4D-US, respectively, and 93.59%, 90.80%, and 93.70%, respectively, for 2D-US +4D-US. The combined diagnosis of 2D-US +4D-US achieved statistically higher accuracy, sensitivity, and specificity than either of them alone. One-way analysis of variance and multivariate logistic regression analysis identified that the independent risk factors affecting fetal malformation were age ≥ 35, history of adverse pregnancy and childbirth, medication during pregnancy, toxic exposure during pregnancy, and history of seropositive for TORCH-IgM. Folic acid supplementation was a protective factor. Conclusions: Prenatal US is an effective approach for screening fetal malformations. 2D-US +4D-US can effectively improve the diagnostic rate of fetal malformations. For pregnant women with high-risk factors, prevention should be given priority, and prenatal screening and prenatal diagnosis should be standardized to reduce the occurrence of fetal malformations.

Prenatal ultrasound diagnosis of neural tube defects in the era of intrauterine repair - Eleven years' experiences.

OBJECTIVE: To modify the current neural tube defect (NTD) classification for fetal medicine specialists, and to investigate the impact of prenatal ultrasound conus medullaris position screening on the detection rate of closed spinal dysraphism and pregnancy outcomes. MATERIALS AND METHODS: The clinical data of 112 patients prenatally diagnosed with neural tube defects in Taiji clinic from 2008 to 2018 were retrospectively analyzed. All cases were classified following the modified classification. We compared the detection rate before and after introducing the conus medullaris screening and pregnancy outcomes for NTD types. RESULTS: Closed spinal dysraphism type prevailed in our sample (43.8%). The median gestational age at the time of detection for cranial dysraphism was 13.3 weeks, open spinal dysraphism was 22.0 weeks, and closed spinal dysraphism was 22.6 weeks. All cranial dysraphism (n = 43) and open spinal dysraphism cases (n = 20) had pregnancies terminated. For closed spinal dysraphism Class 1, the live-birth rate was 100.0% in the cases without other anomalies and 33.3% in the cases with other anomalies, respectively (X2 = 17.25, p < 0.001). Similarly, for Class 2, pregnancy continuation rate was 50.0% in cases without other anomalies and 20.0% in cases with other anomalies, yet it failed to reach statistical significance (X2 = 0.9, p = 0.524). CONCLUSION: Our case series may help to improve early screening and prenatal diagnosis of NTDs. Modified classification is adjusted for use in ultrasound fetal care facilities, which could be used for predicting pregnancy outcome. We suggest promoting first-trimester anatomical screening in order to make an earlier diagnosis and therefore provide better prenatal care for open spinal dysraphism cases in the era of intrauterine repair. Our findings imply that the use of fetal conus medullaris position as a marker for closed spinal dysraphism improves the detection rate and would unlikely lead to a higher termination rate.

Midwife-performed checklist and ultrasound to identify obstetric conditions at labour triage in Uganda: A quasi-experimental study.

OBJECTIVE: The aim of this study was to evaluate the effect of a midwife-performed checklist and limited obstetric ultrasound on sensitivity and positive predictive value for a composite outcome comprising multiple gestation, placenta praevia, oligohydramnios, preterm birth, malpresentation, abnormal foetal heart rate. DESIGN: Quasi-experimental pre-post intervention study. SETTING: Maternity unit at a district hospital in Eastern Uganda. INTERVENTIONS: Interventions were implemented in a phased approach: standardised labour triage documentation (Phase 1), a triage checklist (Phase 2), and checklist plus limited obstetric ultrasound (Phase 3). PARTICIPANTS: Consenting women presenting to labour triage for admission after 28 weeks of gestation between February 2018 and June 2019 were eligible. Women not in labour or those requiring immediate care were excluded. 3,865 women and 3,937 newborns with similar sample sizes per phase were included in the analysis. MEASUREMENT AND FINDINGS: Outcome data after birth were used to determine true presence of a complication, while intake and checklist data were used to inform diagnosis before birth. Compared to Phase 1, Phase 2 and 3 interventions improved sensitivity (Phase 1: 47%, Phase 2: 68.8%, Phase 3: 73.5%; p ≤ 0.001) and reduced positive predictive value (65.9%, 55%, 48.7%, p ≤ 0.001) for the composite outcome. No phase differences in adverse maternal or foetal outcomes were observed. CONCLUSION: Both a triage checklist and a checklist plus limited obstetric ultrasound improved accurate identification of cases with some increase in false positive diagnosis. These interventions may be beneficial in a resource-limited maternity triage setting to improve midwives' diagnoses and clinical decision-making.

Guideline No. 410: prevention, screening, diagnosis, and pregnancy Management for fetal neural tube defects

This revised guideline is intended to provide an update on the genetic aspects, prevention, screening, diagnosis, and management of fetal neural tube defects. Target population: Women who are pregnant or may become pregnant. Neural tube defect screening should be offered to all pregnant women. For prevention: a folate-rich diet, and folic acid and vitamin B12 supplementation, with dosage depending on risk level. For screening: second-trimester anatomical sonography; first-trimester sonographic screening; maternal serum alpha fetoprotein; prenatal magnetic resonance imaging. For genetic testing: diagnostic amniocentesis with chromosomal microarray and amniotic fluid alpha fetoprotein and acetylcholinesterase; fetal exome sequencing. For pregnancy management: prenatal surgical repair; postnatal surgical repair; pregnancy termination with autopsy. For subsequent pregnancies: prevention and screening options and counselling. The research on and implementation of fetal surgery for prenatally diagnosed myelomeningocele has added a significant treatment option to the previous options (postnatal repair or pregnancy termination), but this new option carries an increased risk of maternal morbidity. Significant improvements in health and quality of life, both for the mother and the infant, have been shown to result from the prevention, screening, diagnosis, and treatment of fetal neural tube defects. The benefits for patient autonomy and decision-making are provided in the guideline. Harms include an unexpected fetal diagnosis and the subsequent management decisions. Harm can also result if the patient declines routine sonographic scans or if counselling and access to care for neural tube defects are delayed. Cost analysis (personal, family, health care) is not within the scope of this clinical practice guideline. A directed and focused literature review was conducted using the search terms spina bifida, neural tube defect, myelomeningocele, prenatal diagnosis, fetal surgery, neural tube defect prevention, neural tube defect screening, neural tube defect diagnosis, and neural tube defect management in order to update and revise this guideline. A peer review process was used for content validation and clarity, with appropriate ethical considerations. The authors rated the quality of evidence and strength of recommendations using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach. See online Appendix A (Tables A1 for definitions and A2 for interpretations of strong and weak recommendations). Maternity care professionals who provide any part of pre-conception, antenatal, delivery, and neonatal care. This guideline is also appropriate for patient education.

Scoping Review of the Prenatal Diagnosis of Agenesis of the Corpus Callosum.

OBJECTIVE: To map and summarize the literature related to the prenatal diagnosis of agenesis of the corpus callosum (ACC) to inform nursing practice. DATA SOURCES: We searched MEDLINE, CINAHL, PyscINFO, and Academic Search Complete with the use of strings of curated terms to cover the broad ACC nomenclature. Documents were published in English between 2009 and June 1, 2020. We also hand searched the reference lists of included documents. STUDY SELECTION: We screened 582 abstracts and retrieved the full texts of primary research articles, reviews, discussion papers, and peer-reviewed book chapters if the abstracts specifically mentioned ACC and the prenatal period. We excluded case reports, conference and poster abstracts, papers on broader anomalies, and animal studies. We reviewed 84 full-text documents and identified 61 for inclusion. DATA EXTRACTION: We charted the data through an iterative process under headings for location, article type, study design, participant age, ACC type, recruitment, method, tools/assessments, results, key recommendations, gestational age at diagnosis, termination of pregnancy rate, the definition of isolated ACC, and our notes of critique of the document. DATA SYNTHESIS: We constructed a narrative synthesis from thematically arranged data. In the included documents, ACC was diagnosed between 17 and 38 weeks gestation and was frequently described as heterogeneous because of different causes, presentations, and outcomes. Whether the ACC was isolated as the only anomaly or present with other anomalies was considered the key factor for prenatal counseling. However, the definition of isolated ACC was inconsistent. CONCLUSION: The inconsistent nomenclature and definitions of an isolated presentation of ACC increase the ambiguity in the prenatal diagnosis and must be considered when the outcome and diagnostic efficacy studies are interpreted. There is an absence of research on parents' experiences of prenatal diagnoses of ACC to inform holistic nursing interventions and the provision of psychosocial support.

Efficacy of an ultrasound training program for nurse midwives to assess high-risk conditions at labor triage in rural Uganda.

Many high-risk conditions of pregnancy are undetected until the time of delivery in low-income countries. We developed a point-of-care ultrasound training protocol for providers in rural Uganda to detect fetal distress or demise, malpresentation, multiple gestation, placenta previa, oligohydramnios and preterm delivery. This was a mixed-methods study to evaluate the 2-week training curriculum and trainees' ability to perform a standard scanning protocol and interpret ultrasound images. Surveys to assess provider confidence were administered pre-training, immediately after, and at 3-month follow up. Following lecture and practical demonstrations, each trainee conducted 25 proctored scans and were required to pass an observed structured clinical exam (OSCE). All images produced 8 weeks post course underwent blinded review by two ultrasound experts to assess image quality and to identify common errors. Key informant interviews further assessed perceptions of the training program and utility of point-of-care ultrasound. All interviews were audio recorded, transcribed, and reviewed by multiple readers using a content analysis approach. Twenty-three nurse/nurse midwives and two physicians from one district hospital and three health centers participated in the training curriculum. Confidence levels increased from an average of 1 point pre-course to over 6 points post-course for all measures (maximum of 7 points). Of 25 participants, 22 passed the OSCE on the first attempt (average score 89.4%). Image quality improved over time; the final error rate at week 8 was less than 5%, with an overall kappa of 0.8-1 for all measures between the two reviewers. Among the 12 key informant interviews conducted, key themes included a desire for more hands-on training and longer duration of training and challenges in balancing clinical duties with ability to attend training sessions. This study demonstrates that providers without previous ultrasound experience can detect high-risk conditions during labor with a high rate of quality and accuracy after training.

Preliminary Investigation of the Diagnosis of Neonatal Congenital Small Bowel Atresia by Ultrasound.

PURPOSE: To assess the diagnostic value of ultrasonography (US) for congenital small bowel atresia (SBA) in neonates and their sonographic characteristics. METHODS: A retrospective analysis was performed of 20 neonates who were confirmed with SBA by operation from March 2014 to January 2019. All the neonates have been scanned by US before surgery, and no one underwent barium enema or upper gastrointestinal imaging prior to US. Preoperation ultrasound characteristics about intestinal morphology and intestinal contents were collected, further to summarize the typical ultrasonic features of SBA. RESULTS: Five cases were duodenal atresia, and 15 cases were jejuno-ileal atresia. Distended proximal intestines, liquid with tiny points in it, can be found in 20 neonates. The small intestine without any gas can be found in 20 neonates. Microcolon, no gas and other contents in it, can be found in 16 cases. CONCLUSIONS: The typical ultrasonic features of SBA include dilation in proximal intestines, small intestines, and microcolon. US is a promising modality in the clinical diagnosis of SBA.

Effectiveness of routine third trimester ultrasonography to reduce adverse perinatal outcomes in low risk pregnancy (the IRIS study): nationwide, pragmatic, multicentre, stepped wedge cluster randomised trial.

OBJECTIVES: To investigate the effectiveness of routine ultrasonography in the third trimester in reducing adverse perinatal outcomes in low risk pregnancies compared with usual care and the effect of this policy on maternal outcomes and obstetric interventions. DESIGN: Pragmatic, multicentre, stepped wedge cluster randomised trial. SETTING: 60 midwifery practices in the Netherlands. PARTICIPANTS: 13 046 women aged 16 years or older with a low risk singleton pregnancy. INTERVENTIONS: 60 midwifery practices offered usual care (serial fundal height measurements with clinically indicated ultrasonography). After 3, 7, and 10 months, a third of the practices were randomised to the intervention strategy. As well as receiving usual care, women in the intervention strategy were offered two routine biometry scans at 28-30 and 34-36 weeks' gestation. The same multidisciplinary protocol for detecting and managing fetal growth restriction was used in both strategies. MAIN OUTCOME MEASURES: The primary outcome measure was a composite of severe adverse perinatal outcomes: perinatal death, Apgar score <4, impaired consciousness, asphyxia, seizures, assisted ventilation, septicaemia, meningitis, bronchopulmonary dysplasia, intraventricular haemorrhage, periventricular leucomalacia, or necrotising enterocolitis. Secondary outcomes were two composite measures of severe maternal morbidity, and spontaneous labour and birth. RESULTS: Between 1 February 2015 and 29 February 2016, 60 midwifery practices enrolled 13 520 women in mid-pregnancy (mean 22.8 (SD 2.4) weeks' gestation). 13 046 women (intervention n=7067, usual care n=5979) with data based on the national Dutch perinatal registry or hospital records were included in the analyses. Small for gestational age at birth was significantly more often detected in the intervention group than in the usual care group (179 of 556 (32%) v 78 of 407 (19%), P<0.001). The incidence of severe adverse perinatal outcomes was 1.7% (n=118) for the intervention strategy and 1.8% (n=106) for usual care. After adjustment for confounders, the difference between the groups was not significant (odds ratio 0.88, 95% confidence interval 0.70 to 1.20). The intervention strategy showed a higher incidence of induction of labour (1.16, 1.04 to 1.30) and a lower incidence of augmentation of labour (0.78, 0.71 to 0.85). Maternal outcomes and other obstetric interventions did not differ between the strategies. CONCLUSION: In low risk pregnancies, routine ultrasonography in the third trimester along with clinically indicated ultrasonography was associated with higher antenatal detection of small for gestational age fetuses but not with a reduced incidence of severe adverse perinatal outcomes compared with usual care alone. The findings do not support routine ultrasonography in the third trimester for low risk pregnancies. TRIAL REGISTRATION: Netherlands Trial Register NTR4367.

Caracterización de las enfermedades valvulares congénitas en la edad pediátrica / Characterization the pediatric patients with diagnostic of illnesses congenital valvulares

Introducción: Las valvulopatías congénitas son un grupo de entidades en las cuales la principal alteración anatomofuncional está en las válvulas cardiacas. Objetivo: Caracterizar los pacientes pediátricos nacidos vivos con diagnósticos de valvulopatías congénitas. Métodos: Se realizó una investigación descriptiva retrospectiva a partir de los registros de valvulopatías congénitas del Servicio de Cardiología del Hospital Pediátrico Universitario José Luis Miranda en Santa Clara, Cuba, en el periodo de 2005 a 2016. La población estuvo conformada por los 147 niños nacidos vivos con diagnóstico de valvulopatías congénitas. Se empleó un muestreo no probabilístico intencional por criterios y la muestra quedó conformada por 143. La recogida de la información se realizó a través de la revisión documental de las historias clínicas. Resultados: La tasa de incidencia de la valvulopatías congénitas fue de 1,5 x 1 000 nacidos vivos, predominó la estenosis pulmonar que agrupó el 70,6 por ciento de los diagnosticados. Se encontró predominio del sexo masculino con 50,3 por ciento, se determinó que 45,5 por ciento de los casos se diagnosticaron antes de los 29 días de nacido, período que incluye un diagnóstico prenatal. Conclusiones: El desarrollo del diagnóstico prenatal de las cardiopatías congénitas ha posibilitado la disminución de la incidencia de las malformaciones más complejas. El conocimiento de las enfermedades congénitas del corazón contribuye a operar de forma segura y con resolución anatómica completa a muchos de estos niños en el período prenatal o cuando son lactantes pequeños, para evitar el deterioro global de estos cuando la cardiopatía no está resuelta(AU)

Introduction: The congenital valvulopatías is a group of entities in which the main alteration anatomofuncional is in the heart valves. Objective: To characterize the pediatric patients with diagnostic of born congenital valvulopatías. Methods: He/she was carried out a retrospective descriptive investigation starting from the registrations of congenital valvulopatías of the service of Cardiology of the Hospital Pediatric University student José Luis Miranda in the period of 2005 at the 2016. The population was conformed by the 147 alive born children with diagnostic of congenital valvulopatías, a sampling was not used intentional probabilístico by approaches, being conformed the sample by 143. The collection of the information was carried out through the documental revision of the clinical histories. Results: The rate of incidence of the congenital valvulopatías was of 1,5 x 1000 born alive, the lung estenosis prevailed containing to 70,6 percent of those diagnosed he/she was prevalence of the masculine sex in 50,3 percent, it was determined that 45,5 percent of the cases was diagnosed before the 29 days where a prenatal diagnosis is included. Conclusions: The development of the prenatal diagnosis of the congenital cardiopatías has facilitated the decrease of the incidence of the most complex malformations. The knowledge of the congenital illnesses of the heart contributes to operate in a sure way and with complete anatomical resolution to many of these children in the prenatal period or when they are small nurslings, to avoid the global deterioration of these when the cardiopatía is not resolved(AU)

Caracterización de las enfermedades valvulares congénitas en la edad pediátrica / Characterization the pediatric patients with diagnostic of illnesses congenital valvulares

Introducción: Las valvulopatías congénitas son un grupo de entidades en las cuales la principal alteración anatomofuncional está en las válvulas cardiacas. Objetivo: Caracterizar los pacientes pediátricos nacidos vivos con diagnósticos de valvulopatías congénitas. Métodos: Se realizó una investigación descriptiva retrospectiva a partir de los registros de valvulopatías congénitas del Servicio de Cardiología del Hospital Pediátrico Universitario José Luis Miranda en Santa Clara, Cuba, en el periodo de 2005 a 2016. La población estuvo conformada por los 147 niños nacidos vivos con diagnóstico de valvulopatías congénitas. Se empleó un muestreo no probabilístico intencional por criterios y la muestra quedó conformada por 143. La recogida de la información se realizó a través de la revisión documental de las historias clínicas. Resultados: La tasa de incidencia de la valvulopatías congénitas fue de 1,5 x 1 000 nacidos vivos, predominó la estenosis pulmonar que agrupó el 70,6 por ciento de los diagnosticados. Se encontró predominio del sexo masculino con 50,3 por ciento, se determinó que 45,5 por ciento de los casos se diagnosticaron antes de los 29 días de nacido, período que incluye un diagnóstico prenatal. Conclusiones: El desarrollo del diagnóstico prenatal de las cardiopatías congénitas ha posibilitado la disminución de la incidencia de las malformaciones más complejas. El conocimiento de las enfermedades congénitas del corazón contribuye a operar de forma segura y con resolución anatómica completa a muchos de estos niños en el período prenatal o cuando son lactantes pequeños, para evitar el deterioro global de estos cuando la cardiopatía no está resuelta(AU)

Introduction: The congenital valvulopatías is a group of entities in which the main alteration anatomofuncional is in the heart valves. Objective: To characterize the pediatric patients with diagnostic of born congenital valvulopatías. Methods: He/she was carried out a retrospective descriptive investigation starting from the registrations of congenital valvulopatías of the service of Cardiology of the Hospital Pediatric University student José Luis Miranda in the period of 2005 at the 2016. The population was conformed by the 147 alive born children with diagnostic of congenital valvulopatías, a sampling was not used intentional probabilístico by approaches, being conformed the sample by 143. The collection of the information was carried out through the documental revision of the clinical histories. Results: The rate of incidence of the congenital valvulopatías was of 1,5 x 1000 born alive, the lung estenosis prevailed containing to 70,6 percent of those diagnosed he/she was prevalence of the masculine sex in 50,3 percent, it was determined that 45,5 percent of the cases was diagnosed before the 29 days where a prenatal diagnosis is included. Conclusions: The development of the prenatal diagnosis of the congenital cardiopatías has facilitated the decrease of the incidence of the most complex malformations. The knowledge of the congenital illnesses of the heart contributes to operate in a sure way and with complete anatomical resolution to many of these children in the prenatal period or when they are small nurslings, to avoid the global deterioration of these when the cardiopatía is not resolved(AU)

Delayed cord clamping in term large-for-gestational age infants: A prospective randomised study.

AIM: To compare the post-natal effects of delayed cord clamping (DCC) and early cord clamping (ECC) in term large-for-gestational age (LGA) infants. METHODS: This prospective randomised study included 51 term LGA infants. The umbilical cords of these infants were clamped at 15 s in group 1 (ECC group (n = 26)) and at 60 s in group 2 (DCC group (n = 25)). Data for Apgar scores, cord blood, pH and lactate values, second haematocrit, 24th bilirubin levels, duration of hospital stay and admission to the neonatal intensive care unit (NICU) were recorded. RESULTS: The demographic characteristics of the infants in the study group were not significantly different. No statistically significant difference was observed in the post-natal haematocrit and bilirubin levels between the groups. Six infants (group 1, n = 3; group 2, n = 3) were diagnosed with polycythaemia (P = 0.79); however, these infants remained asymptomatic, and no treatment was required. One infant in each group developed hyperbilirubinemia, which required phototherapy (P = 1.00). The infant with hyperbilirubinemia in the DCC group presented with asymptomatic polycythaemia. Three neonates in the DCC group required admission to the NICU for transient tachypnoea. CONCLUSIONS: No significant increase in the rate of post-natal complications of DCC in term LGA infants was observed in the study. However, before recommending DCC on a routine basis, studies with a larger sample size and long-term follow-up are required to elucidate the risks and benefits of DCC in this group of infants.

Health professionals' experiences and views on obstetric ultrasound in Rwanda: A cross-sectional study.

OBJECTIVES: Implementation of ultrasound in antenatal care (ANC) in low-income countries has been shown to increase pregnant women's compliance with ANC visits, and facilitate detection of high-risk pregnancies. In Rwanda, as in other low-income countries, access to ultrasound has increased significantly, but lack of training is often a barrier to its use. The aim of this study was to investigate Rwandan health professionals' experiences and views of obstetric ultrasound in relation to clinical management, resources and skills. METHODS: A cross-sectional questionnaire study was undertaken between November 2016 and March 2017, as part of the CROss Country UltraSound Study (CROCUS). Data were collected at 108 health facilities located in both rural and urban areas of Rwanda, including provincial, referral, district and private hospitals as well as health centres. Participants were obstetricians (n = 29), other physicians (n = 222), midwives (n = 269) and nurses (n = 387). RESULTS: Obstetricians/gynecologists/other physicians commonly performed ultrasound examinations but their self-rated skill levels implied insufficient training. Access to ultrasound when needed was reported as common in hospitals, but available to a very limited extent in health centres. The vast majority of participants, independent of health profession, agreed that maternity care would improve if midwives learned to perform basic ultrasound examinations. CONCLUSIONS: Barriers to provision of high quality ultrasound services include variable access to ultrasound depending on health facility level and insufficient skills of ultrasound operators. Physicians in general need more training to perform ultrasound examinations. Implementation of a general dating ultrasound examination seems to be a relevant goal as most health professionals agree that pregnant woman would benefit from this service. To further improve maternity care services, the possibility of educating midwives to perform ultrasound examinations should be further explored.

Neural Tube Defects in Embryonic Life: Lessons Learned From 340 Early Pregnancy Failures.

OBJECTIVES: The aim of this study was to evaluate the feasibility of sonographic assessment of the embryonic/fetal neural tube in nonviable pregnancies and to determine the defect incidence. METHODS: Prospective analysis of transvaginally acquired 3-dimensional (3D) multiplanar and 3D surface-rendered volume sets of 340 cases of missed abortion between March 2010 and September 2015 was performed. Data regarding karyotype and postmortem examination as well as demographic features and the outcomes of subsequent pregnancies were evaluated. RESULTS: In 223 cases, an embryo/fetus was detected and considered suitable for further evaluation: in 37 of 223 (16.6%) embryos/fetuses, a neural tube defect was present: 27 of 37 cephaloceles, 5 of 37 anencephalies/exencepahlies, 3 of 37 spina bifidas, 1 of 37 caudal regression syndrome, and 1 of 37 iniencephaly. Additional alterations were not observed. In 7 of 37 cases karyotyping was carried out and showed no aneuploidy. Eight subsequent pregnancies had a favorable outcome, with 1 ending in an intrauterine fetal death during the 22nd week of gestation. Maternal folic acid supplementation was provided for all subsequent pregnancies. No neural tube defects occurred. CONCLUSIONS: Sonographic 3D evaluation of complete neural tube closure in embryonic/fetal demise is technically feasible and can be achieved in embryos with a crown-rump length greater than 8 mm. In 26 of 37 cases a defective closure site could be allocated to high-risk areas known for early embryonic demise. Regardless of the etiology of different neural tube defects, high-dose folic acid prophylaxis must be recommended in all cases. Sonographic evaluation of the neural tube, including 3D surface-rendered images, should be offered to every woman with a missed abortion because of the impact on subsequent pregnancies.

Sustained Chronic Maternal Hyperoxygenation Increases Myocardial Deformation in Fetuses with a Small Aortic Isthmus at Risk for Coarctation.

BACKGROUND: We aimed to assess differences in myocardial deformation in fetuses at risk for coarctation (CoA) and the effects of maternal hyperoxygenation on deformation. METHODS: Fetal echocardiography and velocity vector imaging were performed prospectively and serially in 48 fetuses with a small aortic isthmus and 48 gestation age-matched normal fetuses. Fetuses with a small aortic isthmus were randomly divided into two groups: one group with and the other group without maternal supplemental oxygen administration. The strain (S) and strain rate (SR) in the left ventricle (LV) and right ventricle (RV) were measured and compared between the groups. Regression analyses were performed to identify potential factors associated with myocardial deformation. RESULTS: Compared with normal fetuses, fetuses with a small aortic isthmus exhibited a lower S and SR at baseline. A negative correlation was found between aortic isthmus velocity-time integrals and S and SR at baseline (P < .05). In the group that received supplemental oxygen therapy, the S and SR in both the LV and RV increased as a function of time, especially 4 weeks after the initiation of oxygen therapy (P < .05). The duration of oxygen therapy and increased combined cardiac index were associated with increased myocardial deformation (P < .05). CONCLUSIONS: Myocardial deformation appears abnormal in those at risk for CoA beginning in utero, and chronic oxygen therapy appears to increase deformation measures. These findings may improve patient counseling and perinatal management.

Improving students' ability to perform a standardized foetal biometry plane using ultrasound simulators.

OBJECTIVE: The objective of this study is to assess progress made in the ultrasound (US) measurement of femur length (FL) by students after one hour of training on US obstetric simulators. MATERIALS AND METHODS: Medical residents and midwives registered for the 2016 French national foetal US diploma were invited to a 1-hour US training course with simulators. The time to acquire the FL plane with changing foetal presentation was prospectively measured before and after the training. Every image was recorded, and quality criteria were assessed. RESULTS: Thirty new learners trained in foetal US were evaluated. The time needed to measure the FL was significantly shorter in the post-test versus the pre-test (86s versus 125, P=0.015). The quality criteria were statistically similar before and after training regarding the angle to horizontal (10.0° versus 9.6°, P=0.84) and FL (31.3mm versus 32.0mm, P=0.15). CONCLUSION: The time needed to obtain the FL plane was reduced by 30% after a 1-hour US simulation training session.

Prenatal magnetic resonance and ultrasonographic findings in small-bowel obstruction: imaging clues and postnatal outcomes.

BACKGROUND: Prenatal small-bowel obstruction can result from single or multiple atresias, and it can be an isolated abnormality or part of a syndrome. It is sometimes the first manifestation of cystic fibrosis. Accurate prediction of the level of obstruction and length of bowel affected can be difficult, presenting a challenge for counseling families and planning perinatal management. OBJECTIVE: To review the prenatal US and MRI findings of small-bowel obstruction and to assess whether fetal MRI adds information that could improve prenatal counseling and perinatal management. MATERIALS AND METHODS: We retrospectively reviewed 12 prenatally diagnosed cases of small-bowel obstruction evaluated by both US and MRI from 2005 to 2015. We analyzed gestational age at evaluation, US and MRI findings, gestational age at delivery and postnatal outcomes. RESULTS: The final diagnoses were jejunal atresia (7), ileal atresia (1), cystic fibrosis (3) and combined jejunal and anal atresia (1). Four of the eight with jejunal atresia were found to have multiple small-bowel atresias. Prenatal perforation was noted in three. We identified a trend of increasing complexity of bowel contents corresponding to progressively distal level of obstruction, as indicated by increasing US echogenicity and high T1 signal on MRI. Seven cases of jejunal atresia and one case of ileal atresia demonstrated small ascending, transverse and descending colon (microcolon) with filling of a normal-diameter rectum. In contrast, all three fetuses with cystic fibrosis and the fetus with jejunal-anal atresia demonstrated microcolon as well as abnormal paucity or absence of rectal meconium. Polyhydramnios was present in nine. Eight were delivered prematurely, of whom seven had polyhydramnios. The fetus with jejunal and anal atresia died in utero. Postnatally, three had short gut syndrome, all resulting from multiple jejunal atresias; these three were among a subset of four fetuses whose bowel diameter measured more than 3 cm. Eight infants had no further gastrointestinal complications. The presence of multiple atresias was not predicted by prenatal US or MRI. CONCLUSION: MR provides useful additional information regarding meconium distribution in the small bowel, which helps to clarify the level of obstruction. MR was additionally useful in the assessment of colon and rectal contents, serving as a fetal enema. Abnormally diminished meconium in the rectum suggests cystic fibrosis or combined small-bowel and colonic obstruction, information that is useful in counseling and preparing for postnatal care.