Malformaciones congénitas diagnosticadas en el servicio de medicina materno fetal de la Maternidad Concepción Palacios / Congenital malformations diagnosed in the maternal fetal medicine service of the Maternidad Concepción Palacios

Objetivo: Identificar y clasificar las diferentes anomalías del desarrollo diagnosticadas en la unidad de ecografía del servicio de medicina materno fetal de la Maternidad Concepción Palacios entre enero y diciembre de 2023. Métodos: Estudio retrospectivo, descriptivo, transversal que incluyó la evaluación de los 4225 reportes de ultrasonido obstétrico realizados en 2023. Se excluyeron los estudios sin diagnóstico morfológico. Las variables evaluadas fueron características clínicas de las gestantes, prevalencia según tipo de anomalía del desarrollo y según el aparato o sistema afectado. Resultados: Se diagnosticaron anomalías del desarrollo en 282 pacientes, para una frecuencia de 6,7 %. Las anomalías fueron únicas en 187 casos (66,3 %) y múltiples en 95 pacientes (33,7 %). El total de malformaciones fue 360 (8,5 %). El mínimo de lesiones detectadas fue una y el máximo fue tres. El sistema afectado con mayor frecuencia fue el sistema nervioso central, con 104 casos (28,9 %); le siguen, en orden de frecuencia, los marcadores aislados, vistos en 92 pacientes (25,6 %) y las anomalías cardiovasculares, en 49 fetos (13,6 %). Conclusión: La frecuencia de malformaciones congénitas diagnosticadas en el año 2023 fue de 6,7 % de las ecografías realizadas en la unidad de ecografía del servicio de medicina materno fetal de la Maternidad Concepción Palacios; en las dos terceras partes de los casos fueron únicas y el tercio restante fueron múltiples. En orden de frecuencia, los sistemas afectados fueron sistema nervioso central, marcadores aislados de aneuploidías y anomalías cardiovasculares(AU)

Objective: To identify and classify the different developmental anomalies diagnosed in the ultrasound unit of the maternal-fetal medicine service of the Concepción Palacios Maternity Hospital between January and December 2023. Methods: Retrospective, descriptive, cross-sectional study that included the evaluation of the 4225 obstetric ultrasound reports performed in 2023. Studies without morphological diagnosis were excluded. The variables evaluated were clinical characteristics of the pregnant women, prevalence according to type of developmental anomaly and according to the affected apparatus or system. Results: Developmental abnormalities were diagnosed in 282 patients, with a frequency of 6.7%. The anomalies were single in 187 cases (66.3%) and multiple in 95 patients (33.7%). The total number of malformations was 360 (8.5%). The minimum number of injuries detected was one and the maximum was three. The most frequently affected system was the central nervous system, with 104 cases (28.9%); This is followed by isolated markers, seen in 92 patients (25.6%), and cardiovascular anomalies, in 49 fetuses (13.6%). Conclusion: The frequency of congenital malformations diagnosed in 2023 was 6.7% of the ultrasound scans performed in the ultrasound unit of the maternal-fetal medicine service of the Concepción Palacios Maternity Hospital; Two-thirds of the cases were singles and the remaining third were multiples. In order of frequency, the affected systems were central nervous system, isolated markers of aneuploidies, and cardiac anomalies(AU)

Valoración del margen de error ecográfico entre el peso fetal estimado y el peso al nacer en la Maternidad del Hospital de Clínicas / Assessment of the ultrasound margin of error between the estimated fetal weight and the weight at birth in the Maternity of the Hospital de Clínicas / Avaliação da margem de erro ultrassonográfica entre o peso fetal estimado e o peso ao nascer na Maternidade do Hospital de Clínicas

Introducción: La valoración ultrasonográfica del peso fetal permite valorar el crecimiento y bienestar fetal pudiendo estimar el peso al nacimiento, factor determinante para el pronóstico vital. Objetivos: Determinar el margen de error ecográfico del peso fetal estimado (PFE) en relación con el peso al nacer de los neonatos de la Maternidad del Hospital de Clínicas entre los años 2020 y 2022 Materiales y Métodos: Se realizó un estudio observacional, descriptivo y transversal en mujeres que tuvieron un parto en el lugar y el período mencionado, y que contaban con ecografía obstétrica de crecimiento realizada con menos de 7 días respecto al nacimiento. Se calculó el error del PFE mediante la fórmula: (Peso al Nacer - Peso Fetal Estimado) / Peso al Nacer) x 100. Se contrastó el error del peso fetal estimado con el índice de masa corporal, diabetes y estados hipertensivos del embarazo, utilizando t de Student y con la edad gestacional y edad materna mediante el índice de Pearson tomando valores estadísticamente significativos menores a 0,05. Resultados: Se incluyeron 258 pacientes. El margen de error ecográfico del PFE fue de 8,3% DE ± 7. Se obtuvo un valor p para el IMC de 0,228, diabetes p 0,915, estados hipertensivos p 0,967, días en que se realizaba la ecografía p 0,5 y edad gestacional el p 0,001. Conclusiones: El margen de error ecográfico del PFE se encuentra por debajo de los parámetros internacionales. Se encontró asociación estadísticamente significativa con la edad gestacional, no así con las otras variables.

Introduction: Ultrasonographic assessment of fetal weight allows assessment of fetal growth and well-being and can estimate birth weight, a determining factor for vital prognosis. Objectives: Determine the ultrasound margin of error of the estimated fetal weight (EFP) in relation to the birth weight of neonates at the Maternity Hospital of the Hospital de Clínicas between the years 2020 and 2022. Materials and Methods: An observational, descriptive and cross-sectional study was carried out on women who had their birth in the aforementioned place and period and who had an obstetric growth ultrasound performed less than 7 days after birth. The error of the EPF was calculated using the formula: (Birth Weight - Estimated Fetal Weight) / Birth Weight) x 100. The error of the estimated fetal weight was contrasted with the body mass index, diabetes and hypertensive state of pregnancy, using Student's t and with gestational age and maternal age using the Pearson index taking statistically significant values ​​less than 0.05. Results: 258 patients were included. The ultrasound margin of error of the EPF was 8.3% SD ± 7. A p value was obtained for BMI of 0.228, diabetes p 0.915, hypertensive states p 0.967, days in which the ultrasound was performed p 0.5 and age gestational p 0.001. Conclusions: The ultrasound margin of error of the EPF is below the international parameters. Statistically significant associations were found with gestational age, but not with the other variables.

Introdução: A avaliação ultrassonográfica do peso fetal permite avaliar o crescimento e bem-estar fetal e pode estimar o peso ao nascer, fator determinante para o prognóstico vital. Objetivos: Determinar a margem de erro ultrassonográfica do peso fetal estimado (PFE) em relação ao peso ao nascer dos neonatos atendidos na Maternidade do Hospital de Clínicas entre os anos de 2020 e 2022. Materiais e Métodos: Foi realizado um estudo observacional, descritivo e transversal com mulheres que tiveram o parto no local e período mencionados e que realizaram ultrassonografia obstétrica de crescimento menos de 7 dias após o nascimento. O erro do PFE foi calculado pela fórmula: (Peso ao Nascer - Peso Fetal Estimado) / Peso ao Nascer) x 100. O erro do peso fetal estimado foi contrastado com o índice de massa corporal, diabetes e estado hipertensivo da gestação, utilizando-se o teste de Student. t e com idade gestacional e idade materna utilizando o índice de Pearson assumindo valores estatisticamente significativos menores que 0,05. Resultados: foram incluídos 258 pacientes. A margem de erro ultrassonográfica do PFE foi de 8,3% DP ± 7. Obteve-se valor de p para IMC de 0,228, diabetes p 0,915, estados hipertensivos p 0,967, dias em que foi realizada a ultrassonografia p 0,5 e idade gestacional p 0,001. Conclusões: A margem de erro ultrassonográfica do PFE está abaixo dos parâmetros internacionais. Foram encontradas associações estatisticamente significativas com a idade gestacional, mas não com as demais variáveis.

Chorionic bump: Progression to a subamniotic hematoma.

INTRODUCTION: A chorionic bump is an increasingly recognized ultrasound finding in first-trimester scans, which has been associated with early pregnancy loss. In ongoing second-trimester pregnancies, however, chorionic bumps usually resolve over time with no deleterious effect on the fetus. In this report, we describe the incidental ultrasound detection of a chorionic bump in early pregnancy and its progression to a subamniotic hematoma in the second trimester of pregnancy that persisted as such until delivery. CASE REPORT: A round, echogenic mass protruding from the choriodecidual surface measuring 13 × 11 × 8 mm was first identified during a transvaginal scan at 6.3 weeks' gestation. Subsequent follow-up scan at 8.3 weeks revealed an increase in the size of the chorionic bump to 25 × 20 × 19 mm, which remained stable as determined by the routine late first-trimester scan. At the second-trimester scan, a subamniotic hematoma was identified in the surface of the placenta, close to the insertion of the umbilical cord. Subsequently, the pregnancy proceeded uneventfully. DISCUSSION: The etiopathology and clinical significance of a chorionic bump remain unclear. The case herein reported demonstrates that a chorionic bump can grow considerably without having a deleterious effect on the early embryo and, occasionally, can persist throughout pregnancy as a subamniotic hematoma. CONCLUSION: A chorionic bump can occasionally progress to a subamniotic hematoma from the second trimester onwards. This observation further supports the hypothesis that a chorionic bump is the result of choriodecidual bleeding. An alternative explanation for the development of subamniotic hematomas is proposed.

Síndrome de Edwards: desde el diagnóstico prenatal hasta el neonatólogo

RESUMEN El síndrome de Edwards o síndrome de trisomía 18 es un trastorno cromosómico autosómico que se caracteriza por la presencia de un cromosoma 18 extra, con rasgos clínicos distintivos. Se presenta un caso con diagnóstico prenatal basados en la ecografía morfológica obstétrica que condujeron a la realización ecocardiografía fetal donde resalta la displasia de la válvula pulmonar con doble lesión y la comunicación interventricular. Posteriormente se realiza cordocentesis para realización del cariotipo y asesoramiento genético.

ABSTRACT Edwards' syndrome, or trisomy 18 syndrome, is an autosomal chromosomal disorder characterized by the presence of an extra chromosome 18, with distinctive clinical features. We present a case with a prenatal diagnosis based on obstetrical morphological ultrasound that led to the performance of a fetal echocardiography with findings of a pulmonary valve dysplasia with double injury and interventricular communication. Subsequently, cordocentesis is performed for karyotyping and genetic counseling.

Utilidad de la ecografía y del eco-doppler color en pacientes de alto riesgo obstétrico / Usefulness of ultrasound and color Doppler ultrasound in high-risk obstetric patients / Utilidade do ultrassom e do ultrassom Doppler colorido em pacientes obstétricas de alto risco

Resumen: La ecografía obstétrica, nos permite determinar con adecuada precisión la biometría fetal y realizar el seguimiento de su curva de crecimiento en función de la edad gestacional. El Eco-Doppler Feto-Placentario, permite el estudio del flujo sanguíneo materno-fetal y de la circulación placentaria de forma no invasiva, inocua y reproducible. Su eficacia ha sido demostrada en el control del embarazo de alto riesgo obstétrico, logrando una reducción de la mortalidad perinatal del 49%. El mismo evalúa la circulación útero - placentaria (arterias uterinas y arteria umbilical), la circulación fetal arterial (arteria cerebral media) y la venosa (Ductus Venoso, Vena Cava Inferior, Vena Umbilical). Identificar el grupo de pacientes con trombofilia, que requieren un control ecográfico más estricto es fundamental para lograr el beneficio con el tratamiento médico.

Abstract: Obstetric ultrasound allows us to determine with adequate precision the fetal biometry and to monitor its growth curve based on gestational age. The Feto-Placental Eco-Doppler allows the study of maternal-fetal blood flow and placental circulation in a non-invasive, safe and reproducible way. Its efficacy has been demonstrated in the control of high-risk obstetric pregnancy, achieving a 49% reduction in perinatal mortality. It evaluates the uterine-placental circulation (uterine arteries and umbilical artery), the fetal arterial circulation (middle cerebral artery) and the venous circulation (Ductus Venoso, Inferior Vena Cava, Umbilical Vein). Identifying the group of patients with thrombophilia, who require stricter ultrasound control is essential to achieve benefit with medical treatment.

Resumo: A ultrassonografia obstétrica permite determinar com precisão adequada a biometria fetal e monitorar sua curva de crescimento com base na idade gestacional. O Eco-Doppler Feto-Placental permite o estudo do fluxo sanguíneo materno-fetal e da circulação placentária de forma não invasiva, segura e reprodutível. Sua eficácia foi demonstrada no controle da gravidez obstétrica de alto risco, alcançando uma redução de 49% na mortalidade perinatal. Avalia a circulação útero-placentária (artérias uterinas e artéria umbilical), a circulação arterial fetal (artéria cerebral média) e a circulação venosa (Canal Venoso, Veia Cava Inferior, Veia Umbilical). Identificar o grupo de pacientes com trombofilia, que necessita de controle ultrassonográfico mais rígido, é essencial para obter benefício com o tratamento médico.

Detection of high-risk pregnancies in low-resource settings: a case study in Guatemala.

BACKGROUND: Maternal and neonatal mortality is still very high at a global level, even though its reduction is a goal established among the Sustainable Development Goals by the United Nations. In order to improve prenatal care to address this challenge, this article proposes a strategy to detect and refer high risk pregnancies in rural setting through a portable ultrasound system combined with blood and urine strip tests. METHODS: The Healthy Pregnancy project was conceived as a single, explanatory and positivist case study, with a sample of ten thousand pregnant women attended by itinerant nurses of the Departments of Alta Verapaz and San Marcos. These nurses were trained and equipped with 31 portable ultrasound, and blood and urine tests to detect common obstetric pathology. Moreover, two obstetricians were responsible for remotely supervising the quality of prenatal care. Target communities were selected by the Health Directorates of the public health system from those that had the highest maternal mortality in previous years. RESULTS: The project attended to 10,108 women in 2 years and 3 months. 55 twin gestations (0.54%) were diagnosed. Non-cephalic presentation was found in 14.87% of the pregnant women attended from week 32 onwards. 20 patients were referred for non-evolutive gestation. An 11.08% prevalence of anemia was detected. Urine infections were diagnosed in 16.43% of the cases. Proteinuria was detected in 2.6% of patients, but only 17 of them presented high blood pressure and were therefore referred with a suspected pre-eclampsia. DISCUSSION: The results obtained indicate that an intervention of these characteristics makes it possible to improve the quality of care of rural pregnant women in low and middle-income countries. CONCLUSION: The results show that with suitable equipment, training, and supervision, the nursing staff in charge of care in rural areas can identify and refer most of the obstetric risks in time, which may contribute to the reduction of maternal mortality. TRIAL REGISTRATION: This research was not registered because it is a case study in which the assignment of the medical intervention was not at the discretion of the investigators.

Is There a Difference in Sonographic Estimation of Amniotic Fluid Volume When Measuring With the Probe Perpendicular to the Floor Compared With Perpendicular to the Uterine Contour?

OBJECTIVE: This study sought to determine whether there is a significant difference in amniotic fluid measurements when measuring perpendicular to the floor compared with perpendicular to the uterine contour using both amniotic fluid index and single deepest pocket. METHODS: This was a single-centre, prospective study of women with singleton gestation who were undergoing fetal ultrasound examination. A total of 240 women were enrolled, and single deepest pocket and amniotic fluid index were measured with both techniques. Correlation coefficient and intraclass correlation coefficient were used to assess the agreement between the values using the two methods of measurement (Canadian Task Force Classification II-2). RESULTS: A strong correlation was found between amniotic fluid index measurements (correlation coefficient 0.82; intraclass correlation coefficient 0.7). A strong correlation also was found between single deepest pocket measurements (correlation coefficient 0.7; intraclass correlation coefficient 0.6). CONCLUSION: The measurement of amniotic fluid index and single deepest pocket can be performed either perpendicular to the floor or perpendicular to the uterine contour. There is no significant difference between these measurements and they correlate well.

Reference ranges for ultrasound measurements of fetal kidneys in a cohort of low-risk pregnant women.

PURPOSE: Alterations in renal dimensions may be an early manifestation of deviation from normality, with possible repercussions beyond intrauterine life. The objective of this study was to establish reference curves for fetal kidney dimensions and volume from 14 to 40 weeks of gestation. METHODS: This is a prospective longitudinal study of 115 Brazilian participants in the "WHO multicentre study for the development of growth standards from fetal life to childhood: the fetal component". Pregnant women with clinical and sociodemographic characteristics allowing the full potential fetal growth were followed up from the first trimester until delivery. These women underwent serial sonographic evaluation of fetal kidneys. The longitudinal, anteroposterior and transverse diameters of both fetal kidneys were measured, in addition to calculation of kidney volume. By quantile regression analysis, reference curves of renal measurements related to gestational age were built. RESULTS: Standard normal sonographic values of renal biometry were defined during pregnancy. Reference values for the 10th, 50th and 90th centiles of different fetal kidney measurements (longitudinal, anteroposterior, transverse and volume) from the 14th to the 40th week of gestation were fitted. CONCLUSION: The reference curves presented should be of the utmost importance for screening and diagnosis of alterations in renal development during the intrauterine period.

The reverse boomerang sign: a marker for first-trimester transposition of great arteries.

OBJECTIVE: To describe a new sonographic marker of transposition of great arteries (TGA) during the first-trimester screening. METHODS: We reviewed six cases of TGA from 2013 to 2016 in which an antenatal diagnosis of TGA at first-trimester screening (11-13 + 6 weeks of gestation) was confirmed postnatally. We specifically assessed images obtained by scanning the fetal heart in three vessels (3V) and three-vessel with trachea (3VT) views using color Doppler. The "reverse boomerang" sign was defined as a reverse curvature of right ventricle outflow tract (RVOT) at level of the 3VT view. RESULTS: We described six cases of confirmed TGA, five singletons and one twin pregnancy, among which only two vessels and the reverse curvature of RVOT (reverse boomerang sign) was demonstrated in the first-trimester screening at level of 3VT view. Ventricular septal defects were observed in three cases, and double outlet right ventricle in one case. No other cardiac or extracardiac anomalies were identified. Termination of pregnancy was not performed in any case. CONCLUSION: Our series case suggests that the reverse boomerang sign may improve the early prenatal screening for TGA.

Renal Interlobar Vein Impedance Index as a First-Trimester Marker Does Not Predict Hypertensive Disorders of Pregnancy.

OBJECTIVES: The purpose of this study was to examine whether the maternal renal interlobar vein impedance index as assessed by first-trimester sonography is able to predict the later development of hypertensive disorders of pregnancy. METHODS: Venous Doppler parameters of both maternal kidneys were studied in 214 pregnant women at gestational ages of 11 weeks to 13 weeks 6 days. Patients were classified according to outcomes related to hypertensive disorders. Detection rates and areas under receiver operating characteristic curves were determined for the maternal renal interlobar vein impedance index as a first-trimester predictor of preeclampsia and gestational hypertension. RESULTS: Among the 214 patients, 22 (10.3%) developed preeclampsia; 10 (4.7%) developed gestational hypertension; and 182 were unaffected by hypertensive disorders (controls; 85.0%). In the overall study population, there was no difference in the impedance index between the right (0.44; 95% confidence interval, 0.35-0.50) and left (0.43; 95% confidence interval, 0.35-0.53) sides (P = .86). The average impedance index did not differ among women destined to develop preeclampsia (0.46; 95% confidence interval, 0.38-0.57), gestational hypertension (0.39; 95% confidence interval, 0.33-0.46), or pregnancies uncomplicated by hypertensive disease (0.42; 95% confidence interval, 0.37-0.50; P = .15). Low detection rates and the area under the curve analysis demonstrated that the impedance index was not predictive of hypertensive disorders of pregnancy. CONCLUSIONS: The maternal renal interlobar vein impedance index should not be considered a first-trimester marker of hypertensive disorders of pregnancy.

Desafios da perinatalidade para a equipe: a utilidade da presença de um profissional psi com formação no método Bick de observação de bebês / Challenges of perinatality for the team: the usefulness of the presence of a psychology professional trained in tne Bick method

O período perinatal, ao qual temos nos dedicado, tem especificidades importantes a serem consideradas. É constituído de processos complexos e de momentos determinantes - confirmação da gravidez, gestação, parto e nascimento, e puerpério - que se desenrolam em um tempo curto. Esses momentos são acompanhados de profundas transformações em todos os envolvidos. Neste artigo pretendemos discutir os desafios dessas mudanças provocadas pela chegada de um bebê, especialmente para a equipe de profissionais da perinatalidade que trabalham na linha de frente - ultrassonografistas, obstetras, enfermeiros, neonatólogos - e que participam nâo apenas do nascimento de uma mãe, de um pai, um irmão, avós, bisavós. Os benefícios da presença de um profissional psi, com formação no método Bick, são também discutidos a partir de aplicações do método realizadas no setting ultrassonográfico, no centro obstétrico e na UTI neonatal

The perinatal period, to which we have devoted ourselves, has important specifities to consider. It is composed of complex processes in a short period, and defining moments - confirmation of pregnancy, gestation, chilbirth and delivery, and the puerperium. These moments are accompanied by profound transformations in all involved. In this paper we intend to discuss the challenges represented by these changes that a baby's arrival provoques, especially for the team of perinatal professionals who work at the front line - sonographers, obstetricians, nurses, neonatologists - and who are involved not only in the baby's birth but simultaneously in the birth of a mother, father, sibling, grandparent, greatgrandparent. The benefits of the presence of a psychology professional previously trained in the method are also discussed, based on applications of the method performed in different settings such as ultrasound , obstetric centre and NICU

“Exame bento” ou “foto do bebê”? Biomedicalização e estratificação nos usos do ultrassom obstétrico no Rio de Janeiro / “Holy scan” or “picture of the baby?” Biomedicalization and stratification in the use of obstetric ultrasound in Rio de Janeiro

Resumo A partir de etnografias realizadas em serviços públicos e privados do Rio de Janeiro, sustentamos que a difusão do fenômeno de (bio)medicalização varia de acordo com o estrato social das gestantes, produzindo corpos fetais e gestantes, assim como processos gestacionais, totalmente diversos, dependendo da camada social das mulheres atendidas. Tomando a premissa fundamental de que a biomedicalização consiste em uma transformação no processo de medicalização pela incorporação crescente da tecnociência à biomedicina, o universo observado evidencia diferentes estágios dessa transformação, acompanhando, de modo consistente, a estratificação social das grávidas submetidas ao exame de ultrassom.

Abstract Based on ethnographic studies conducted at public and private healthcare facilities in Rio de Janeiro, we argue that the dissemination of (bio)medicalization varies in accordance with the social stratum of the expectant mothers, thereby producing thoroughly distinct fetal and pregnant bodies, as well as different gestational processes. Starting from the basic premise that biomedicalization represents a transformation in the process of medicalization, characterized by the growing incorporation of technoscience into biomedicine, the observed universes displayed different stages in this transformation, consonant with the social stratification of the women who underwent the scans.

Assessment of Intracranial Structure Volumes in Fetuses With Growth Restriction by 3-Dimensional Sonography Using the Extended Imaging Virtual Organ Computer-Aided Analysis Method.

OBJECTIVES: To assess intracranial structure volumes by 3-dimensional (3D) sonography in fetuses with growth restriction. METHODS: We conducted a prospective cross-sectional case-control study involving 59 fetuses with growth restriction (38 fetuses with estimated weight <3rd percentile and 21 fetuses with estimated weight between 3rd and 10th percentiles, according to Hadlock et al [Radiology 1984; 150:535-540]) and 54 controls between 24 and 34 weeks' gestation. The following fetal intracranial structure volumes were assessed: cerebellum, brain, and frontal region. The volume was assessed by 3D sonography using the extended imaging virtual organ computer-aided analysis method with 10 sequential planes. Analysis of variance was used to compare fetal groups. The intraclass correlation coefficient was used to assess intraobserver and interobserver reproducibility. RESULTS: Statistical significance between the brain, frontal region, and cerebellar volumes and a relationship between the frontal region and the brain in fetuses with estimated weights below the 3rd percentile and controls were observed (P < .001; P < .001; and P = .002; and P = .008, respectively). Good intraobserver and interobserver reproducibility was observed for the fetal brain, frontal region, and cerebellar volumes, with intraclass correlation coefficients of 0.998, 0.997, 0.997, 0.999, 0.997, and 0.998, respectively. CONCLUSIONS: The intracranial structure volumes assessed by 3D sonography using the extended imaging virtual organ computer-aided analysis method were reduced in fetuses with growth restriction (estimated weight <3rd percentile).

Reference ranges for 2-dimensional sonographic lung measurements in healthy fetuses: a longitudinal study.

OBJECTIVES: The purpose of this study was to establish reference ranges for 2-dimensional sonographic measurements of fetal lungs from longitudinal data. METHODS: A total of 214 fetal lung measurements were longitudinally evaluated in 62 healthy fetuses between 20 and 36 weeks' menstrual age. Both right and left lung areas were measured in the heart 4-chamber view using lung area tracing and axis diameter methods. Multilevel modeling was used to evaluate the expected values and variability with respect to menstrual age and to generate reference ranges for the lung area, lung-to-head ratio, quantitative lung index, and observed-to-expected lung-to-head ratio for both lungs. RESULTS: The expected values varied with menstrual age for all parameters. Variance was menstrual age dependent for all parameters except the longest diameter area measurements and their lung-to-head ratios. CONCLUSIONS: Models are presented for expected 2-dimensional sonographic lung size parameters and their variance as a function of menstrual age. These data have been used to generate age-specific reference ranges for both measurements and indices.

Assessing the impact of twin pregnancies on the pelvic floor using 3-dimensional sonography: a pilot study.

OBJECTIVES: The purpose of this study was to compare the morphologic characteristics of the pelvic floor musculature between women with twin and singleton pregnancies. METHODS: We conducted a cross-sectional case-control study of 40 nulliparous women aged 20 to 38 years to compare women with singleton pregnancies (n = 23) to women with twin pregnancies (n = 17). Biometric measurements of the levator hiatus and the sagittal and coronal diameters were made by transperineal 3-dimensional sonography between the 28th and 38th gestational weeks. Comparisons were statistically assessed by the unpaired Student t test and Mann-Whitney U test. RESULTS: For the women with singleton pregnancies, the mean sagittal diameters at rest, during the Valsalva maneuver, and during pelvic floor contraction were 5.3, 5.7, and 4.5 cm, respectively, and the mean coronal diameters under these conditions were 3.8, 4.1, and 3.6 cm. For the women with twin pregnancies, the corresponding values were as follows: mean sagittal diameters, 5.3, 5.8, and 4.6 cm; and mean coronal diameters, 4.3, 4.3, and 3.8 cm. The differences in coronal diameters were statistically significant at rest (P < .01) and during contraction (P = .04). The mean levator hiatal areas for the women with singleton pregnancies were 14.6, 16.9, and 11.7 cm(2) at rest, during Valsalva, and during contraction, respectively; for the women with twin pregnancies, these values were 16.0, 18.6, and 12.6 cm(2). CONCLUSIONS: Hiatal measurements were higher in twin than in singleton pregnancies, with coronal diameters reaching significance at rest and during contraction, suggesting that pelvic support undergoes greater changes during twin pregnancy.

Reference charts of fetal biometric parameters in 31,476 Brazilian singleton pregnancies.

OBJECTIVES: The purpose of this study was to establish reference charts of fetal biometric parameters measured by 2-dimensional sonography in a large Brazilian population. METHODS: A cross-sectional retrospective study was conducted including 31,476 low-risk singleton pregnancies between 18 and 38 weeks' gestation. The following fetal parameters were measured: biparietal diameter, head circumference, abdominal circumference, femur length, and estimated fetal weight. To assess the correlation between the fetal biometric parameters and gestational age, polynomial regression models were created, with adjustments made by the determination coefficient (R(2)). RESULTS: The means ± SDs of the biparietal diameter, head circumference, abdominal circumference, femur length, and estimated fetal weight measurements at 18 and 38 weeks were 4.2 ± 2.34 and 9.1 ± 4.0 cm, 15.3 ± 7.56 and 32.3 ± 11.75 cm, 13.3 ± 10.42 and 33.4 ± 20.06 cm, 2.8 ± 2.17 and 7.2 ± 3.58 cm, and 256.34 ± 34.03 and 3169.55 ± 416.93 g, respectively. Strong correlations were observed between all fetal biometric parameters and gestational age, best represented by second-degree equations, with R(2) values of 0.95, 0.96, 0.95, 0.95, and 0.95 for biparietal diameter, head circumference, abdominal circumference, femur length, and estimated fetal weight. CONCLUSIONS: Fetal biometric parameters were determined for a large Brazilian population, and they may serve as reference values in cases with a high risk of intrauterine growth disorders.

O aparelho é como um automóvel; a pista é a paciente: para além do ensino de tecnologia no pré-natal / The apparatus is like a car; the road is the patient: beyond the teaching of technology in prenatal care

O presente estudo contempla as práticas e ideias envolvidas na formação acadêmica de um grupo social relevante: o dos médicos que, dada sua posição hierárquica significativa na produção da marca ultrassom obstétrico, parece-nos ser um ponto de "parada" interessante e fundamental no fluxo circular entre ideias, marcas e coisas que constituem esse objeto, ultrassom. A observação etnográfica da situação de ensino permite captar dinamicamente esse momento fundamental no qual os principiantes são apresentados a uma tecnologia que foi histórica (e provisoriamente) constituída como indispensável no acompanhamento pré-natal. Pretende-se, assim, apreender de que modo é produzida a "socialização visual" dos futuros profissionais; a pesquisa empírica evidenciou que, juntamente com um determinado tipo de olhar, outros elementos bastante heterogêneos também são ensinados aos futuros médicos. Uma tensão bastante presente no campo consiste na dicotomia entre uma abordagem eminentemente clínica e outra, de teor fortemente tecnicista. A eventual precariedade de dispositivos tecnológicos evidencia diversos paradoxos e incongruências nesta segunda tendência. As modificações ocorridas no desenrolar dos diversos processos que se articulam no campo observado são discutidas em termos do que são capazes de revelar sobre os grupos sociais envolvidos em sua produção.

This study analyzes the practices and ideas involved in the academic formation of an important social group: the doctors who, given their significant hierarchical position in the production of the obstetric ultrasound mark seem, in our opinion to be an interesting and fundamental "stopping" place in the circular flow of ideas, marks and things that form the ultrasound object. The ethnographic observation of the teaching situation allows the dynamic capture of this fundamental moment when beginners are introduced to a technology that was historically (and provisionally) considered indispensable in prenatal monitoring. The intention is thus to apprehend how the "visual socialization" of future professionals is produced; the empirical research showed that, together with a certain kind of gaze, other quite heterogeneous elements are also taught to the future doctors. A tension that is significantly present in the field is the dichotomy between an eminently clinical approach and another one that is strongly technicist. The contingent precariousness of technological devices evidences various paradoxes and incongruences in the latter. The changes during the development of the various processes that are articulated in the observed field are discussed in terms that provide insights into the works of the social groups that produced them.

Defeito de fechamento do tubo neural: a experiência do serviço de medicina fetal do HMIPV / Neural tube defects: the HMIPV fetal medicine group experience 2006 – 2008

Introdução: Entre 2% e 3% dos recém-nascidos apresentam uma anomalia maior, das quais os defeitos de fechamento do tubo neural (DFTN) representam o grupo mais pesquisado – após os defeitos congênitos do coração, é o segundo defeito mais comum. Os DFTNs apresentam uma taxa de mortalidade significativa, a qual pode responder por mais de 50% das mortes por malformações, além de um alto impacto na saúde dos sobreviventes. O objetivo deste trabalho foi estudar os casos de DFTN acompanhados pelo Serviço de Medicina Fetal do HMIPV para conhecer a distribuição e evolução dessas anomalias e comparar com a literatura. Métodos: Foram estudados 1.354 laudos ecográficos do Serviço de Medicina Fetal do HMIPV no período de janeiro de 2006 a dezembro de 2008, resultando em 58 gestações cujo feto apresentava alguma anomalia congênita. Dessas, foram selecionadas as gestações com diagnóstico ecográfico e posterior confirmação pós-natal de anencefalia, cefalocele ou espinha bífida, totalizando 13 casos. Resultados: Houve seis (46,1%) casos de anencefalia, três (23,1%) cefaloceles, três (23,1%) espinhas bífidas e um (7,7%) caso de mais de um DFTN associado. Apenas 38,5% dos defeitos foram isolados. O sexo feminino foi o mais acometido, e a faixa etária materna mais acometida foi 16 a 20 anos; 84,6% abaixo de 30 anos. Em 30,8% das gestações estavam presentes conhecidos fatores de risco para o desenvolvimento de DFTN. Conclusão: Anencefalia e espinha bífida foram os defeitos mais comuns. Houve uma maior associação de outras malformações assim como a presença de fatores de risco conhecidos para o desenvolvimento de DFTN

Introduction: From 2% to 3% of newborns have a major anomaly, of which neural tube defects (NTDs) is the most investigated group – after congenital heart defects, it is the second most common defect. The NTDs have a significant mortality rate, which may account for more than 50% of deaths from malformations, and a high impact on the health of survivors. The aim here was to study the cases of NTD followed by the HMIPV Fetal Medicine Group so as to understand the distribution and evolution of these anomalies and to compare with the literature. Methods: A total of 1,354 ultrasonographic reports of the HMIPV Fetal Medicine Service from January 2006 to December 2008 were studied, resulting in 58 pregnancies where the fetus had some congenital abnormality. From these we selected pregnancies with ultrasonographic diagnosis and subsequent postnatal confirmation of anencephaly, encephalocele or spina bifida, which amounted to 13 cases. Results: There were six (46.1%) cases of anencephaly, three (23.1%) cases of encephaloceles, three (23.1%) cases of spina bifida, and one (7.7%) case of more than one associated NTD. Only 38.5% of the defects were isolated. Females were more affected, and the most affected maternal age group was 16-20 years; 84,6% under 30 years. In 30.8% of these pregnancies well-known risk factors for the development of NTD were present. Conclusion: Anencephaly and spina bifida were the most common defects. There was a higher association of other malformations as well as the presence of known risk factors for the development of NTD

A ultra-sonografia obstétrica e a relação materno-fetal em situações de normalidade e anormalidade fetal / Obstetric ultrasound and mother-fetus relationship in normal and abnormal diagnoses

A ultra-sonografia obstétrica já é considerada um exame de rotina no pré-natal. Esse procedimento inaugurou uma nova forma de contato com o universo intra-uterino, além de ter passado a antecipar dados reais do bebê que antes só eram conhecidos após o seu nascimento. Hoje é possível saber o sexo do bebê, visualizar suas características físicas e maneiras de se movimentar, bem como fazer um diagnóstico de anormalidade fetal. Assim, a crescente utilização da ultra-sonografia parece afetar a relação pais-feto. Diversos estudos têm sido realizados a respeito das repercussões psicológicas da ultra-sonografia obstétrica na relação materno-fetal. O presente artigo revisa os principais achados desses estudos destacando tanto as situações de normalidade quanto de anormalidade fetal. Embora não haja consenso quanto ao impacto da ultra-sonografia para a relação materno-fetal, os estudos são unânimes em reconhecer o impacto emocional desse momento em situações de normalidade e, especialmente, nos casos de anormalidade fetal. Assim sendo, é necessário atentar também para os aspectos psicológicos desse exame e para seu potencial de afetar a relação pais-bebê.

Nowadays the obstetric ultrasound is considered a prenatal period routine. This procedure has inaugurated a new contact with the intrauterine world, and has anticipated infant's real data concerning. It is possible to know the infant's sex, visualize physical characteristics and movement patterns, as well as to diagnose fetal abnormality. Therefore it is possible to affirm the increase of ultrasound use may affect parent-fetus relationship. Several studies have been carried out concerning the psychological implications of obstetric ultrasound on mother-fetus relationship. The present article reviews the main findings of these studies stressing both the fetal normality and abnormality situations. Even though there is no consensus regarding the impact of ultrasound on mother-fetus relationship, the studies are unanimous about the emotional impact of this exam in normal and, especially, in abnormal cases. It is necessary to attend to the psychological aspects of this examination and to its potential effect on parent-infant relationship.