MED MAF - Artigos
Permanent URI for this collection
Browse
Recent Submissions
- Higher Risk of Preterm Twin Delivery Among Shorter Nulliparous WomenPublication . Simões, T; Pereira, I; Gomes, L; Brás, S; Nogueira, I; Queirós, AObjective: To determine if maternal height in nulliparous women influences pregnancy results in twin pregnancies. Material and methods: Retrospective cohort analysis evaluating twin pregnancies followed at Centro Hospitalar Universitário Lisboa Central, between 1995 and 2020. Of the 2900 pregnancies followed in that period, 886 nulliparous women with dichorionic twin pregnancies were selected. Two groups were considered: A - maternal height <163 cm (
- Estetrol/Drospirenone – an Advance on CHC with Ethinyl Estradiol?Publication . Palma, F; Pacheco, A; Costa, AR; Rebelo, C; Bombas, TA contraceção hormonal combinada (CHC) é um dos métodos contracetivos mais utilizados em todo o mundo. As questões relacionadas com a segurança, particularmente o risco tromboembólico (TE), estão em permanente avaliação. A combinação estetrol/ drospirenona (E4/DRSP) é um contracetivo oral combinado (COC) eficaz, com um perfil de hemorragia estável e regular e efeito favorável na pele e no controlo do peso. Tem menor impacto nos fatores pró-trombóticos que as combinações com etinilestradiol (EE), o que configura um perfil de maior segurança, que importa confirmar em estudos de base populacional.
- Prospective Risk of Intrauterine Death of Monochorionic Twins: UpdatePublication . Simões, T; Queirós, A; Marujo, AT; Valdoleiros, S; Silva, P; Blickstein, IObjective: To calculate an updated prospective risk of fetal death in monochorionic-biamniotic (MCBA) twins. Study design: We evaluated 520 MCBA twin pregnancies that had intensive prenatal surveillance and delivered in a single Portuguese referral center. The prospective risk of fetal death was calculated as the total number of deaths at the beginning of the gestational period divided by the number of continuing pregnancies at or beyond that period. Data were compared to the 2006 previous report. Results: Nearly 80% of the neonates weighed <2500 g, including 13.5% who weighed <1500 g. Half were born at <36 weeks, including 13.8% who were born at <32 weeks. The data indicate an increased IUFD rate over time - 16 fetal deaths per pregnancy (3.1%) and 22 IUFDs per fetus (2.1%). The rate of IUFD after 32-33 weeks, however, was halved (1/187 pregnancies and 1/365 fetuses, 0.5 and 0.3%, respectively). Conclusion: Intensive prenatal surveillance might decrease the unexpected fetal death rates after 33 week's gestation and our data do not support elective preterm birth for uncomplicated MCBA twins.
- Perda Gestacional RecorrentePublication . Bessa Monteiro, S; Lebre, A; Serrano, F; Martins, I; Reis, I; Lima, J; Bombas, T
- Perda Gestacional Recorrente: Um longo caminho a percorrerPublication . Serrano, F
- Risk of Fetal Loss After Chorionic Villus Sampling in Twin Pregnancy Derived from Propensity Score Matching AnalysisPublication . Gil, M; Rodríguez‐Fernández, M; Elger, T; Akolekar, R; Syngelaki, A; De Paco Matallana, C; Molina, F; Gallardo Arocena, M; Chaveeva, P; Persico, N; Accurti, V; Kagan, K; Prodan, N; Cruz, J; Nicolaides, KObjective: To estimate the risk of fetal loss associated with chorionic villus sampling (CVS) in twin pregnancy, using propensity score analysis. Methods: This was a multicenter cohort study of women with twin pregnancy undergoing ultrasound examination at 11-13 weeks' gestation, performed in eight fetal medicine units in which the leadership were trained at the Harris Birthright Research Centre for Fetal Medicine in London, UK, and in which the protocols for screening, invasive testing and pregnancy management are similar. The risk of death of at least one fetus was compared between pregnancies that had and those that did not have CVS, after propensity score matching (1:1 ratio). This procedure created two comparable groups by balancing the maternal and pregnancy characteristics that lead to CVS being performed, similar to how randomization operates in a randomized clinical trial. Results: The study population of 8581 twin pregnancies included 445 that had CVS. Death of one or two fetuses at any stage during pregnancy occurred in 11.5% (51/445) of pregnancies in the CVS group and in 6.3% (515/8136) in the non-CVS group (P < 0.001). The propensity score algorithm matched 258 cases that had CVS with 258 non-CVS cases; there was at least one fetal loss in 29 (11.2%) cases in the CVS group and in 35 (13.6%) cases in the matched non-CVS group (odds ratio (OR), 0.81; 95% CI, 0.48-1.35; P = 0.415). However, there was a significant interaction between the risk of fetal loss after CVS and the background risk of fetal loss; when the background risk was higher, the risk of fetal loss after CVS decreased (OR, 0.46; 95% CI, 0.23-0.90), while, in pregnancies with a lower background risk of fetal loss, the risk of fetal loss after CVS increased (OR, 2.45; 95% CI, 0.95-7.13). The effects were statistically significantly different (P-value of the interaction = 0.005). For a pregnancy in which the background risk of fetal loss was about 6% (the same as in our non-CVS population), there was no change in the risk of fetal loss after CVS, but, when the background risk was more than 6%, the posterior risk was paradoxically reduced, and when the background risk was less than 6%, the posterior risk increased exponentially; for example, if the background risk of fetal loss was 2.0%, the relative risk was 2.8 and the posterior risk was 5.6%. Conclusion: In twin pregnancy, after accounting for the risk factors that lead to both CVS and spontaneous fetal loss and confining the analysis to pregnancies at lower prior risk, CVS seems to increase the risk of fetal loss by about 3.5% above the patient's background risk. © 2021 International Society of Ultrasound in Obstetrics and Gynecology.
- First Trimester Examination of Fetal Anatomy: Clinical Practice Guideline by the World Association of Perinatal Medicine (WAPM) and the Perinatal Medicine Foundation (PMF)Publication . Volpe, N; Sen, C; Turan, S; Sepulveda, W; Khalil, A; Rolnik, D; De Robertis, V; Volpe, P; Gil, M; Chaveeva, P; Dagklis, T; Pooh, R; Kosinski, P; Cruz, J; Huertas, E; D’ Antonio, F; Rodriguez Calvo, J; Daneva Markova, AThis recommendation document follows the mission of the World Association of Perinatal Medicine in collaboration with the Perinatal Medicine Foundation. We aim to bring together groups and individuals throughout the world for precise standardization to implement the ultrasound evaluation of the fetus in the first trimester of pregnancy and improve the early detection of anomalies and the clinical management of the pregnancy. The aim is to present a document that includes statements and recommendations on the standard evaluation of the fetal anatomy in the first trimester, based on quality evidence in the peer-reviewed literature as well as the experience of perinatal experts around the world.
- Association Between Glycated Albumin, Fructosamine, and HbA1c with Neonatal Outcomes in a Prospective Cohort of Women with Gestational Diabetes MellitusPublication . Mendes, N; Alves, M; Andrade, R; Ribeiro, R; Papoila, AL; Serrano, FObjective: To investigate whether glycated albumin, fructosamine, and hemoglobin A1c (HbA1c) are associated with neonatal complications in newborns of pregnant women with gestational diabetes mellitus (GDM). Methods: Between November 2016 and September 2017, women with a singleton pregnancy and GDM were enrolled in a prospective study in an obstetric Portuguese referral center. Glycemic markers were compared between mothers of newborns with and without complications. Multivariable logistic regression models and corresponding areas under the receiver operating characteristic curve (AUC) were used. Results: A total of 85 women participated in the study. Raised levels of glycated albumin and fructosamine were associated with at least one neonatal complication (OR- [odds ratio] estimate: 1.33, P=0.015; OR: 1.24, P=0.027, respectively) and with respiratory disorders at birth (OR 1.41, P=0.004; OR 1.26, P=0.014, respectively). HbA1c was not associated with these outcomes. All biomarkers were associated with large-for-gestational age (LGA) status (OR 1.61, P<0.001; OR 1.45, P<0.001; OR 3.62, P=0.032 for glycated albumin, fructosamine, and HbA1c, respectively). All had similar AUC for at least one neonatal complication (0.82; 0.81; 0.79, respectively). For newborn respiratory disorders, AUCs were 0.83, 0.81, and 0.76, respectively, and for LGA status were 0.81, 0.79, and 0.71, respectively. Conclusion: Raised values of glycated albumin and fructosamine were associated with particular perinatal complications in newborns of mothers with GDM, better discriminating mothers of newborns with and without complications than HbA1c.
- João Dória Nóbrega (1934-2021), um Homem SingularPublication . Campos, A; Soares, C; Serrano, F; Alves, MJ
- A Preliminary Exploration of the Placental Position Influence on Uterine Electromyography Using Fractional ModellingPublication . Şan, M; Batista, A; Russo, S; Esgalhado, F; Palma dos Reis, C; Serrano, F; Ortigueira, MThe uterine electromyogram, also called electrohysterogram (EHG), is the electrical signal generated by uterine contractile activity. The EHG has been considered an expanding technique for pregnancy monitoring and preterm risk evaluation. Data were collected on the abdominal surface. It has been speculated the effect of the placenta location on the characteristics of the EHG. In this work, a preliminary exploration method is proposed using the average spectra of Alvarez waves contractions of subjects with anterior and non-anterior placental position as a basis for the triple-dispersion Cole model that provides a best fit for these two cases. This leads to the uterine impedance estimation for these two study cases. Non-linear least square fitting (NLSF) was applied for this modelling process, which produces electric circuit fractional models' representations. A triple-dispersion Cole-impedance model was used to obtain the uterine impedance curve in a frequency band between 0.1 and 1 Hz. A proposal for the interpretation relating the model parameters and the placental influence on the myometrial contractile action is provided. This is the first report regarding in silico estimation of the uterine impedance for cases involving anterior or non-anterior placental positions.