Análise das indicações de cesáreas com base na classificação de Robson em uma maternidade brasileira de risco habitual / Cesarean section indication analysis in a habitual-risk maternity hospital in Brazil according to Robson classification system

Objetivo: Avaliar a taxa de cesáreas e suas principais indicações com base na classificação de Robson na Maternidade Municipal de São Vicente em 2020, um hospital público de risco habitual. Métodos: Trata-se de um estudo transversal observacional. Foram efetuadas revisão, correção e análise retrospectiva e documental da classificação de Robson na Maternidade Municipal de São Vicente. Foram analisados partos de janeiro a dezembro de 2020, dos quais foram coletadas e ordenadas as informações mais relevantes para a pesquisa. Resultados: Uma amostra de 1.627 partos foi encontrada. A taxa geral de cesáreas encontrada foi de 46,3%. A contribuição relativa dos grupos 1, 2 e 5 para a taxa de cesáreas foi de 16,8%, 13,3% e 46,8%, respectivamente, enquanto a contribuição relativa das indicações de cesáreas foi de 25,5% para parto cesáreo anterior e de 21,5% para sofrimento fetal agudo. Conclusão: Foi evidenciada alta taxa de cesáreas, e as principais indicações foram cesárea prévia e sofrimento fetal agudo. Os grupos 1, 2 e 5 da classificação de Robson foram os que mais contribuíram para essa taxa.

Objective: To evaluate the cesarean section rate and the cesarean indication rate based on Robson Classification during 2020 in Sã o Vicente's Municipal Maternity, a habitual-risk public hospital. Methods: This is a cross-sectional observational study. We have reviewed, corrected, analyzed retrospectively and documented Robson Classification in Sã o Vicente's Municipal Maternity. Births from January to December 2020 were analyzed, from which the main data for the research was collected and organized. Results: A sample of 1,627 births was found. The overall rate of cesarean section was 46.3%. The relative contribution of groups 1, 2 and 5 to the cesarean rate was 16.8%, 13.3% and 46.8%, respectively. While the cesarean indication relative contribution was 25.5% for previous cesarean and 21.5% for fetal distress. Conclusion: We found a high cesarean rate and the main indications were previous cesarean and fetal distress. Robson classification groups 1, 2 and 5 contributed the most to this rate.

Characteristics of women who underwent one or more previous cesarean sections according to Nascer no Brasil / Características de mulheres com uma ou mais cesáreas anteriores no nascer no Brasil

ABSTRACT OBJECTIVE To descriptively analyze Brazilian parturient women who underwent previous cesarean section and point out the factors associated with Vaginal Birth After Cesarean (VBAC) in Brazil. METHODS The study used data from women with one, two, or three or more cesarean sections from the survey Nascer no Brasil (Birth in Brazil). Differences between categories were assessed through the chi-square test (χ2). Variables with significant differences (p < 0.05) were incorporated into logistic regression. FINDINGS Out of the total of 23,894 women, 20.9% had undergone a previous cesarean section. The majority (85.1%) underwent another cesarean section, with 75.5% occurring before the onset of labor. The rate of Vaginal Birth After Cesarean (VBAC) was 14.9%, with a success rate of 60.8%. Women who underwent three or more cesarean sections displayed greater social vulnerability. The chances of VBAC were higher among those who opted for a vaginal birth towards the end of gestation, had a prior vaginal birth, underwent labor induction, were admitted with over 4 centimeters of dilation, and without partner. Receiving care from the private health care system, having two or more prior cesarean sections, obstetric complications, and deciding on cesarean delivery late in gestation reduced the chances of VBAC. Age group, educational background, prenatal care adequacy, and the reason for the previous cesarean section did not result in significant differences. CONCLUSION The majority of women who underwent a previous cesarean section in Brazil are directed towards another surgery, and a higher number of cesarean sections is linked to greater social inequality. Factors associated with VBAC included choosing vaginal birth towards the end of gestation, having had a previous vaginal birth, higher cervical dilation upon admission, induction, assistance from the public health care system, absence of obstetric complications, and without a partner. Efforts to promote VBAC are necessary to reduce overall cesarean rates and their repercussions on maternal and child health.

RESUMO OBJETIVO Analisar descritivamente as parturientes brasileiras com cesariana anterior e apontar os fatores associados ao parto vaginal após cesárea (Vaginal Birht After Cesarean- VBAC) no Brasil. MÉTODOS Foram utilizados dados de mulheres com uma, duas ou três e mais cesáreas da pesquisa Nascer no Brasil. As diferenças entre categorias foram avaliadas pelo teste de qui-quadrado (χ2). As variáveis que apresentaram diferença significativa (< 0,05) foram incluídas em regressão logística. RESULTADOS Do total de 23.894 mulheres, 20,9% tinham cesárea anterior. A maior parte (85,1%) foi submetida a outra cesárea, 75,5% antes do início do trabalho de parto. A porcentagem de VBAC foi de 14,9%, uma taxa de sucesso de 60,8%. Mulheres com três cesáreas ou mais apresentaram maior vulnerabilidade social. As chances de VBAC foram maiores entre aquelas decididas pelo parto vaginal no fim da gestação, com parto vaginal anterior, indução de parto, admitidas com mais de 4 centímetros de dilatação e sem companheiro. Assistência no sistema privado, ter duas cesáreas ou mais, complicações obstétricas e decisão por cesariana no final da gestação diminuíram as chances de VBAC. Faixa etária, escolaridade, adequação do pré-natal e razão da cesárea anterior não apresentaram diferença significativa. CONCLUSÃO A maior parte das mulheres com cesárea anterior no Brasil é encaminhada para uma nova cirurgia, e o maior número de cesáreas está associado à maior iniquidade social. Os fatores associados ao VBAC foram decisão pelo parto vaginal no fim da gestação, parto vaginal anterior, maior dilatação cervical na internação, indução, atendimento no sistema público de saúde, ausência de complicações obstétricas e ausência de companheiro. São necessárias ações de estímulo ao VBAC, visando reduzir taxas globais de cesarianas e suas consequências para a saúde materno-infantil.

Attempted vaginal birth after cesarean: assessment of morbidity and predictors of success / Parto tras cesárea anterior: análisis de la morbimortalidad materno-fetal

Objective: Determining the appropriate approach for delivery after previous cesarean is a very controversial issue. Our objective was to establish whether pregnant women with a previous cesarean have an increased maternal and fetal morbidity and mortality after attempting vaginal delivery as well as to determine which factors may influence the achievement of a vaginal birth after cesarean. Materials and methods: A retrospective observational cohort study including 390 patients (196 cesarean group and 194 nulliparous group) was carried out. We compared neonatal and maternal outcomes between groups. Afterward, a multivariate logistic regression was applied for our second objective. Results: There were higher rates of uterine rupture (2% vs. 0%, p: 0.045) and puerperal hemorrhage (9.7% vs. 3.1%, p: 0.008) in the cesarean group and lower vaginal delivery rate (58.2% vs. 77.8%, p < 0.0005). We found that the induced onset of labor (OR = 2.9) and new born weight (OR = 1.0001) were associated with an increased risk of cesarean section. Conclusions: Our findings stress the need for further investigations in this field, which might provide a basis for a better management of patients with a previous cesarean.

Objetivo: Determinar el abordaje adecuado del tipo de parto tras una cesárea previa es un tema muy controvertido. Nuestro objetivo fue establecer si las gestantes con cesárea previa presentan mayor morbimortalidad materna y fetal tras intentar parto vaginal, así como determinar qué factores pueden influir en conseguir un parto vaginal posterior a la cesárea. Material y métodos: Estudio observacional de cohortes retrospectivo incluyendo 390 pacientes (196 con cesárea previa, 194 nulíparas). Comparamos los datos sobre los resultados neonatales y maternos. Posteriormente se aplicó un modelo de regresión logística multivariante. Resultados: Hubo mayores tasas de ruptura uterina (2% vs. 0%; p = 0.045) y hemorragia puerperal (9.7% vs. 3.1%, p: 0.008) en el grupo de cesárea anterior, así como una tasa de parto vaginal mas baja (58.2% vs. 77.8%, p < 0.0005). La inducción del parto (OR = 2,9) y el peso del recién nacido (OR = 1.0001) se asociaron a un mayor riesgo de cesárea. Conclusión: La probabilidad de parto vaginal en estas pacientes disminuye cuanto mayor sea el peso del recién nacido y con partos inducidos.

Parto vaginal exitoso y resultados maternos y perinatales en pacientes con antecedente de cesárea y prueba de trabajo de parto: estudio de corte transversal / Successful vaginal delivery and maternal and perinatal outcomes in patients with a history of cesarean section and labor trial: cross-sectional study

Objetivos: determinar la proporción de parto vaginal exitoso en mujeres con cesárea previa, describir las complicaciones maternas y perinatales, y realizar una aproximación a los factores asociados al parto vaginal. Materiales y métodos: estudio de corte transversal descriptivo. Se incluyeron mujeres con antecedente de un parto por cesárea, con edad gestacional mayor a 24 semanas y fetos únicos vivos que tuvieron prueba de parto vaginal, atendidas en una institución pública de alta complejidad en 2019. Se excluyeron aquellas pacientes con antecedente de más de una cesárea o miomectomía. Muestreo consecutivo. Se midieron variables sociodemográficas, obstétricas, vía del parto y complicaciones maternas y perinatales. Se hace análisis descriptivo y un análisis exploratorio multivariado de los factores asociados al parto vaginal exitoso. Resultados: de 286 gestantes incluidas, el porcentaje de éxito de parto vaginal fue del 74,5 %. Se identificaron complicaciones maternas en el 3,2 % de los partos vaginales y en el 6,8 % de las cesáreas. El 1,3 % de los recién nacidos tuvo alguna complicación. Hubo 2 muertes perinatales. Se encontró asociación entre parto vaginal exitoso y tener antecedente de parto vaginal (OR: 2,7; IC 95 %: 1,15-6,29); puntaje de Bishop mayor de 6 (OR: 2,2; IC 95 %: 1,03-4,56); inicio de trabajo de parto espontáneo (OR: 4,5; IC 95 %: 2,07-9,6); y edad materna menor de 30 años (OR: 2,28; IC 95 %: 1,2-4,2). Conclusiones: el parto vaginal es una opción segura para considerar en pacientes con cesárea anterior, especialmente si inician trabajo de parto espontáneo o han tenido un parto vaginal previamente. Se requieren cohortes prospectivas para confirmar estos hallazgos.

Objectives: To determine the proportion of successful vaginal deliveries in women with prior cesarean section; to describe maternal and perinatal complications; and to examine the factors associated with vaginal delivery. Materials and methods: Descriptive cross-sectional study of women with a history of cesarean delivery, gestational age of more than 24 weeks, singleton live fetuses, with prior vaginal delivery who received care in a high complexity public institution in 2019. Patients with a history of more than one cesarean section or myomectomy were excluded. Consecutive sampling was used. Sociodemographic and obstetric variables, delivery route and maternal and perinatal complications were measured. A descriptive analysis as well as a multivariate exploratory analysis of the factors associated with successful vaginal delivery were carried out. Results: Among 286 pregnant women included, the percentage of successful vaginal deliveries was 74.5 %. Maternal complications were identified in 3.2 % of vaginal delivery cases and in 6.8 % of cesarean births. Complications occurred in 1.3 % of all live neonates; there were 2 perinatal deaths. An association was found between successful vaginal delivery and a history of prior vaginal delivery (OR: 2.7; 95 % CI: 1.15-6.29); a Bishop score greater than 6 (OR: 2.2; 95 % CI: 1.03-4.56); spontaneous labor initiation (OR: 4.5; IC 95 % CI: 2.07-9.6); and maternal age under 30 years (OR:2.28; 95 % CI: 1.2-4.2). Conclusions: Vaginal delivery is a safe option to consider in patients with prior cesarean section, in particular in cases of spontaneous labor initiation or prior vaginal delivery. Prospective cohorts are needed in order to confirm these findings.

Fatores que influenciam a decisão da via do parto / Factors that influence the decision of the parturition method

Objetivos: Verificar os fatores que influenciam a parturiente na decisão da via de parturição e identificar a preferência da via de parto em uma próxima gestação. Metodologia: Trata-se de uma revisão integrativa da literatura com artigos datados de 2010 a 2020, retirado nas bases da SCIELO (Scientific Electronic Library Online) e LILACS (Literatura Latino-Americana e do Caribe em Ciências e Saúde). Resultados: Sete dimensões refletem os fatores que influenciam a parturiente no momento da decisão da via de parto: dor ou ausência de dor no momento do parto; dor ou ausência de dor no pós-parto; recuperação no pós-parto; risco de infecção e de hemorragia; experiência prévia; influência da família e médicos, e pelo desejo de realizar a laqueadura. As perguntas norteadoras da pesquisa estão expressas em: quais são os fatores que influenciam a parturiente no momento da decisão da via de parto? E, qual é a via de parto em uma nova gestação? Considerações finais: Os fatores que mais influenciam as gestantes na decisão da via de parto são o medo da dor no parto e a recuperação no pós parto. Em uma nova gestação, acabam optando pela mesma via de parto anterior, devido à segurança, por já terem vivenciado a experiência

Objectives: This study aims to verify the factors that influence the decision of the parturition method and identify the preferred route of parturition in the next pregnancy. Methodology: This is an integrative literature review with articles dated from 2010 to 2020, taken from the SCIELO (Scientific Electronic Library Online) and LILACS (Latin American and Caribbean Literature in Science and Health) databases. Results: Seven dimensions reflect the factors that influence the parturient when deciding the parturition method: pain or absence at the time of parturition; postpartum pain or absence; postpartum recovery; risk of infection and bleeding; previous experience; influence of family and doctors and tubal ligation. The guiding questions of this research are expressed in: What are the factors that influence the parturient when deciding the parturition method? And what is the preferred parturition method a new pregnancy? Final considerations: The factors that most influence pregnant women while deciding the mode of parturition are fear of pain during childbirth and postpartum recovery. In a new pregnancy, they end up opting for the same birth route as the previous one due to the safety of having lived through the experience

Facteurs prédictifs de l'issue de l'accouchement sur utérus cicatriciel, service de gynécologie obstétrique EHS Batna, Algérie / Predictive factors of the outcome of delivery on scar uterus in the department of obstetrics - gynecology EHS Batna, Algeria

Introduction. La pratique de césariennes est en augmentation constante dans le monde, soulevant la problématique de la gestion des femmes enceintes ayant un utérus cicatriciel. L'objectif de notre travail était d'identifier les facteurs significativement associés au succès de l'épreuve utérine au sein de notre service, afin de réaliser une sélection rigoureuse des candidates à la tentative de voie basse. Méthodes. Nous avons mené une étude épidémiologique descriptive, rétrospective, mono centrique au niveau de l'EHS mère ­ enfant Batna du 1er janvier 2018 au 31 décembre 2019 ayant intéressé les femmees porteuses d'un utérus cicatriciel d'origine obstétricale avec un âge de grossesse supérieur à 22 SA. Résultats. Au cours de notre étude nous avons recensé 3002 accouchements sur utérus cicatriciel. Le taux de tentatives de voie basse après césarienne était de 46,84 % avec un taux de succès de 89,19 %. Les principaux facteurs qui favorisent le succès de la tentative de voie basse après césarienne étaient : un antécédent d'accouchement par voie vaginale après la césarienne (p <0,001) la multiparité (p=0,0002), une césarienne précédente pour présentation podalique (p<0,001), un intervalle inter génésique de 12 mois et plus (p <0,001), des conditions locales favorables (dilatation du col supérieure à 4 cm ; p=0,02 et la p=0,02 et la rupture artificielle des membranes ; p =0,02 et la rupture artificielle des membranes ; p=0,03). Les facteurs qui défavorisent le succès de la TVBAC étaient : un antécédent de césarienne pour stagnation ou non-engagement à dilatation complète (p<0,001), un terme d'accouchement supérieur à 40 SA (p=0,002), un poids de naissance supérieur à 4000 g (p<0,001). Les facteurs qui ne semblent pas influencer l'issue de l'épreuve utérine étaient : l'âge maternel, l'âge de réalisation de la première césarienne, la présence de pathologies maternelles et la réalisation de radiopelvimétrie Conclusion. Les facteurs de succès et d'échec d'une TVBAC sur utérus cicatriciel sont importants à relever pour les décisions ultérieures de la voie d'accouchement, la situation obstétricale doit être soigneusement évaluée et en cas de doute, faire appel à une décision collégiale.

Neonatal outcomes in twin pregnancies with the first twin in breech presentation according to the mode of delivery: A cohort study from Dakar Senegal

The objectives of this study were to compare perinatal outcomes in twin pregnancies where the first twin was in the breech presentation. To do so, we performed a 10-year retrospective cohort study in a single university center. All patients with a twin pregnancy with the first twin in breech presentation, a gestational age greater than or equal to 34 weeks' gestation, and a birth weight >= 1500 g were included. The main outcome measures were 5-minute Apgar score <7 and perinatal mortality. We included 353 pairs of twins which complied with the inclusion criteria. One hundred and fifty (150) patients delivered vaginally while 203 pairs of twins were delivered by caesarean section. Patients who delivered abdominally were similar to those who delivered vaginally with regard to age, parity, and gestational age. Six twins A delivered vaginally and 2 delivered by caesarean section had an Apgar score < 7 (p = 0.76) whereas 12 twins B delivered vaginally and 2 delivered abdominally had an Apgar score <7 (p = 0.001). Perinatal mortality did not differ significantly between twins delivered abdominally and those delivered vaginally. There was no evidence that vaginal delivery was risky with regards to depressed Apgar scores for Twin A and neonatal mortality for breech first twins that weighed at least 1500 g. However, Twin B delivered vaginally were more likely to present with a low 5-minute Apgar score. Along with the literature, the findings of this study do not currently allow to define a consensual obstetric attitude towards management of breech first twin deliveries. Until more prospective multicenter randomized controlled studies shed light on this problem, the skills, experience and judgment of the obstetrician will play a major role in the decision-making process. (Afr J Reprod Health 2022; 26[5]: 50-56).

Pectus excavatum em uma ninhada de Buldogue Francês: relato de caso / Pectus excavatum in a French Bulldog Litter: case report

RESUMO O pectus excavatum é considerado uma patologia da parede torácica, onde há convexidade no aspecto ventral do esterno, o que gera complicações secundárias, como alongamento ventrodorsal do tórax e aumento da pressão intratorácica, entre outras. No presente caso, o corpo de um cachorro Buldogue Francês nasceu com sinais prévios de decaimento e baixo consumo de leito materno, além de uma avaliação médica forense. De acordo com a avaliação patológica, foi encontrada uma fenda no peito esternal relacionada às esternas caudais próximas à cartilagem xifóide, conteúdo espumoso na cartilagem epiglótica da laringe e sinais graves de enfisema nos lobos caudal, craniano e médio pulmonar. Na avaliação cardiológica, foi observada assimetria morfológica invaginante no septo interventricular na mesma área em que a fenda esternal ocorre, por sua vez, na avaliação radiográfica, evidencia uma depressão dorsal do terço caudal do esterno com alterações consideráveis na silhueta cardíaca. Na Colômbia não há relatos de ninhadas completas que apresentem esta alteração, portanto, pretende-se que este seja o primeiro relatório anatomopatológico e de imagem que descreva a patologia em caninos.

ABSTRACT Pectus excavatum is considered a pathology of the chest wall where there is convexity in the ventral aspect of the sternum, which generates secondary complications, such as ventrodorsal stretching of the chest and increased intrathoracic pressure, among others. In the present case, the body of a French bulldog dog was born with previous signs of decay and low consumption of maternal waste, in addition to a forensic medical evaluation. According to the pathological evaluation, a crack was found in the sternal chest related to the caudal sternum close to the xiphoid cartilage, frothy content in the laryngeal epiglottis cartilage and severe signs of emphysema in the caudal, cranial and middle lung lobes. In the cardiological evaluation, an invaginating morphological asymmetry was observed in the interventricular septum in the same area in which the sternal cleft occurs, in turn, in the radiographic evaluation, it shows a dorsal depression of the caudal third of the sternum with considerable changes in the cardiac silhouette. In Colombia there are no reports of complete litters that present this alteration, so it is intended that this is the first anatomopathological and imaging report that describes the pathology in canines.

Risk Factors Associated with Uterine Rupture and Dehiscence: A Cross-Sectional Canadian Study / Fatores de risco associados à ruptura uterina e deiscência: Um estudo transversal canadense

Abstract Objective To compare maternal and perinatal risk factors associated with complete uterine rupture and uterine dehiscence. Methods Cross-sectional study of patients with uterine rupture/dehiscence from January 1998 to December 2017 (30 years) admitted at the Labor and Delivery Unit of a tertiary teaching hospital in Canada. Results There were 174 (0.1%) cases of uterine disruption (29 ruptures and 145 cases of dehiscence) out of 169,356 deliveries. There were associations between dehiscence and multiparity (odds ratio [OR]: 3.2; p=0.02), elevated maternal body mass index (BMI; OR: 3.4; p=0.02), attempt of vaginal birth after a cesarian section (OR: 2.9; p=0.05) and 5-minute low Apgar score (OR: 5.9; p<0.001). Uterine rupture was associated with preterm deliveries (36.5 ± 4.9 versus 38.2 ± 2.9; p=0.006), postpartum hemorrhage (OR: 13.9; p<0.001), hysterectomy (OR: 23.0; p=0.002), and stillbirth (OR: 8.2; p<0.001). There were no associations between uterine rupture and maternal age, gestational age, onset of labor, spontaneous or artificial rupture of membranes, use of oxytocin, type of uterine incision, and birthweight. Conclusion This large cohort demonstrated that there are different risk factors associated with either uterine rupture or dehiscence. Uterine rupture still represents a great threat to fetal-maternal health and, differently from the common belief, uterine dehiscence can also compromise perinatal outcomes.

Resumo Objetivo Comparar os fatores de risco maternos e perinatais associados à ruptura uterina completa e deiscência uterina. Métodos Estudo transversal de pacientes com ruptura/deiscência uterina no período de janeiro de 1998 a dezembro de 2017 (30 anos) internadas na Unidade de Parto de um hospital universitário terciário no Canadá. Resultados Ocorreram 174 (0,1%) casos de transtorno uterino (29 rupturas e 145 deiscências) em 169.356 partos. Houve associações entre deiscência e multiparidade (razão de chances [RC]: 3,2; p=0,02), índice demassa corporal (IMC)materno elevado (RC: 3,4; p=0,02), tentativa de parto vaginal após cesariana (RC: 2,9; p=0,05) e baixa pontuação Apgar em 5minutos (RC: 5,9; p<0,001). A ruptura uterina foi associada a partos prematuros (36,5 ± 4,9 versus 38,2 ± 2,9; p=0,006), hemorragia pós-parto (RC: 13,9; p<0,001), histerectomia (RC: 23,0; p=0,002) e natimorto (RC: 8,2; p<0,001). Não houve associação entre ruptura uterina e idade materna, idade gestacional, início do trabalho de parto, ruptura espontânea ou artificial de membranas, uso de ocitocina, tipo de incisão uterina e peso ao nascer. Conclusão Esta grande coorte demonstrou que existem diferentes fatores de risco associados à ruptura ou à deiscência uterina. A ruptura uterina ainda representa uma grande ameaça à saúde materno-fetal e, diferentemente da crença comum, a deiscência uterina também pode comprometer os desfechos perinatais.

Repeated cesarean section and vaginal delivery after cesarean section in São Paulo State in 2012 / Repetição de cesárea e parto vaginal após cesárea, no Estado de São Paulo, em 2012

Abstract Objectives: describe mothers, pregnancies and newborns' characteristics according to the type of childbirth history and to analyze repeated cesarean section (RCS) and vaginal delivery after cesarean section (VBACS), in São Paulo State in 2012. Methods: data are from the Sistema de Informações sobre Nascidos Vivos (Live Birth Information Systems). To find the RCS's group, the current type of childbirth equal to cesarean section was selected and from these all the previous cesareans. To identify the VBACS's group all live birth with current vaginal delivery were selected and from these all previous cesareans. Mothers with a history of RCS and VBACS were analyzed according to the characteristics of the pregnancy, newborn and the childbirth hospital. Results: 273,329 mothers of live birth with at least one previous child were studied. 43% of these were born of RCS and 7.4% of VBACS. Mothers who underwent RCS are older and higher educated and their newborns presented a lower incidence of low birth weight. Early term was the most frequent rating for gestational age born of RCS. Live births were of VBACS and had greater proportions of late term. The RCS was more common in hospitals not affiliated with the Sistema Único de Saúde (SUS) (Public Health System) (44.1%). Conclusion: the high RCS's rates, especially in the private sector, highlight the necessity of improvements in childbirth care model in São Paulo.

Resumo Objetivos: descrever características das mães, da gestação e do recém-nascido, segundo histórico de tipo de parto, analisando repetição de cesárea (RC) e parto vaginal após cesárea (PVAC), no Estado de São Paulo, em 2012. Métodos: os dados são provenientes do Sistema de Informações sobre Nascidos Vivos. Para encontrar o conjunto RC, selecionou-se o tipo de parto atual igual a cesárea e destes buscou-se todos com cesárea anterior. Para identificar o grupo PVAC, selecionou-se os recém-nascido com parto atual vaginal e destes buscou-se todos com cesárea anterior. Foram analisadas mães com história de RC e PVAC, segundo características da gestação, do recémnascido e hospital do parto. Resultados: estudou-se 273.329 nascidos vivos de mães com pelo menos um filho anterior. Destes, 43% nasceram por RC e 7,4% por PVAC. As mães que realizaram RC são mais velhas e mais escolarizadas, seus recém-nascidos apresentaram menor proporção de baixo peso ao nascer. Termo precoce foi a mais frequente idade gestacional dos que nasceram por RC. Os recém-nascidos por PVAC apresentaram maiores proporções de termo tardio. RC foi mais frequente nos hospitais sem vínculo com o Sistema Único de Saúde (44,1%). Conclusão: as altas taxas de RC, principalmente no setor privado, evidenciam necessidade de melhoras no modelo de atenção ao parto em São Paulo.

Gestational risk as a determining factor for cesarean section according to the robson classification groups / Risco gestacional como fator determinante para cesariana de acordo com os grupos da Classificação Robson

Abstract Objective To analyze and compare the frequency of cesarean sections and vaginal deliveries through the Robson Classification in pregnant women attended at a tertiary hospital in two different periods. Methods Cross-sectional, retrospective study of birth records, comprising 4,010 women, conducted from January 2014 to December 2015 in the only public regional referral hospital for the care of high- risk pregnancies, located in Southern Brazil. Results The overall cesarean section rate reached 57.5% and the main indication was the existence of a previous uterine cesarean scar. Based on the Robson Classification, groups 5 (26.3%) and 10 (17.4%) were the most frequent ones. In 2015, there was a significant increase in the frequency of groups 1 and 3 (p < 0.001), when compared with the previous year, resulting in an increase in the number of vaginal deliveries (p < 0.0001) and a reduction in cesarean section rates. Conclusion The Robson Classification proved to be a useful tool to identify the profile of parturients and the groups with the highest risk of cesarean sections in different periods in the same service. Thus, it allowsmonitoring in a dynamic way the indications and delivery routes and developing actions to reduce cesarean rates according to the characteristics of the pregnant women attended.

Resumo Objetivo Analisar e comparar a frequência de partos cesáreos e vaginais através da classificação de Robson em gestantes atendidas em um hospital terciário em dois períodos distintos. Métodos Estudo transversal retrospectivo de registros de nascimento, compreendendo 4.010 mulheres, realizado de janeiro de 2014 a dezembro de 2015 no único hospital público de referência regional para atendimento de gestações de alto risco, localizado no sul do Brasil. A via de parto foi avaliada e as mulheres foram classificadas de acordo com a Classificação de Robson. Resultados A taxa geral de cesariana foi de 57,5% e a principal indicação foi a existência de cicatriz uterina por cesariana prévia. Quando aplicada a Classificação de Robson, os grupos mais frequentes foram o 5 (26,3%) e o 10 (17,4%). No ano de 2015, ocorreu um aumento significativo da frequência dos grupos 1 e 3 (p < 0,001), quando comparado ao ano anterior, resultando em aumento do número de partos vaginais (p < 0,0001) e redução das taxas de cesariana. Conclusão A Classificação de Robson mostra ser uma ferramenta útil para identificar o perfil das parturientes e os grupos com maior risco de cesariana em diferentes períodos em um mesmo serviço. Desta forma, permitemonitorar de forma dinâmica as indicações e vias de parto e desenvolver ações para redução das taxas de cesariana conforme as características das gestantes atendidas.

A comparison of antenatal prediction models for vaginal birth after caesarean section

INTRODUCTION@#An antenatal scoring system for vaginal birth after caesarean section (VBAC) categorises patients into a low or high probability of successful vaginal delivery. It enables counselling and preparation before labour starts. The current study aims to evaluate the role of Grobman nomogram and the Kalok scoring system in predicting VBAC success in Singapore.@*METHODS@#This is a retrospective study on patients of gestational age 37 weeks 0 day to 41 weeks 0 day who underwent a trial of labour after 1 caesarean section between September 2016 and September 2017 was conducted. Two scoring systems were used to predict VBAC success, a nomogram by Grobman et al. in 2007 and an additive model by Kalok et al. in 2017.@*RESULTS@#A total of 190 patients underwent a trial of labour after caesarean section, of which 103 (54.2%) were successful. The Kalok scoring system (area under curve [AUC] 0.740) was a better predictive model than Grobman nomogram (AUC 0.664). Patient's age (odds ratio [OR] 0.915, 95% CI [confidence interval] 0.844-0.992), body mass index at booking (OR 0.902, 95% CI 0.845-0.962), and history of successful VBAC (OR 4.755, 95% CI 1.248-18.120) were important factors in predicting VBAC.@*CONCLUSION@#Neither scoring system was perfect in predicting VBAC among local women. Further customisation of the scoring system to replace ethnicity with the 4 races of Singapore can be made to improve its sensitivity. The factors identified in this study serve as a foundation for developing a population-specific antenatal scoring system for Singapore women who wish to have a trial of VBAC.

O imaginário materno sobre os partos cesáreo e vaginal / The maternal imagery on cesarean and vaginal deliveries / El imaginario materno sobre los partos cesáreo y vaginal

Este artigo objetivou compreender o imaginário materno sobre os partos cesáreo e vaginal. Para isso, utilizou-se de revisão da literatura e entrevista semi-estruturada com quatro gestantes participantes do Grupo de Gestantes de uma maternidade pública de Goiânia. Os dados foram tratados pela análise de conteúdo e mostraram uma visão mais positiva sobre a via vaginal em contraposição ao cirúrgico, que se relacionou à intercorrência. Além disso, o imaginário das participantes se mostrou em grande parte permeado por sentimentos e ideias negativas como medo, ansiedade e preocupação sobre ambos os partos. As principais informações que baseiam as concepções das gestantes partem das experiências passadas por outras mulheres e não dos conhecimentos médicos, de modo que são constituídas principalmente por histórias de violência, dor e desrespeito. Conclui-se que o imaginário materno, formado a partir do contexto atual de saúde, compreende o parto como um evento temido, que se desejaria evitar. Percebe-se que a assistência em saúde prestada hoje ainda é insuficiente por não orientar corretamente a mulher e dificultar que ela domine a cena do parto, o que a deixa à margem da humanização. Ademais, o cuidado terapêutico voltado à mulher não se pauta na opinião e nos sentimentos da paciente para embasar sua atuação, o que de certa forma contribui para manutenção do imaginário negativo sobre parto e demanda maior empenho em relação às práticas e à educação permanente.(AU)

This article sought to understand the maternal imaginary on cesarean and vaginal deliveries. Data were collected by means of a literature review and semi-structured interviews conducted with four pregnant women, participants of the Group of Pregnant Women in a public maternity hospital in Goiânia, and treated by content analysis. The results indicate that mothers tend to have a more positive view of the vaginal route, associating surgical deliveries to pregnancy complications. Being mostly informed by the experiences of other women rather than by medical knowledge, and thus influenced by stories of violence, pain, and disrespect, the imagery of participants proved to be largely permeated by negative feelings and ideas about both types of birth, such as fear, anxiety, and concern. Thus, in the current health context, the maternal imaginary understands childbirth as a feared event, which one would want to avoid. This finding highlights the inappropriate healthcare provided to pregnant women, failing in properly guiding and preventing them from controlling the delivery scene, being left on the margins of humanization. This is because the therapeutic care aimed at women is not based on the patient's opinion and feelings, thus contributing to the maintenance of this negative imagery about childbirth and demanding greater commitment in relation to practices and permanent education.(AU)

Este artículo tuvo como objetivo comprender el imaginario materno sobre cesáreas y partos vaginales. Para eso, se hace una revisión de la literatura y una entrevista semiestructurada con cuatro mujeres embarazadas, participantes del Grupo de Mujeres Embarazadas en un hospital público de maternidad en Goiânia (Brasil). En los datos obtenidos se aplicaron análisis de contenido en que se reveló una visión más positiva de la ruta vaginal en comparación con la quirúrgica relacionada con la complicación. Además, en el imaginario de las participantes figuran sentimientos e ideas negativas como el miedo, la ansiedad y la preocupación por ambos tipos de parto. La información principal que respalda las concepciones de las mujeres embarazadas proviene de las experiencias transmitidas por otras mujeres, y no del conocimiento médico, que consiste principalmente en historias de violencia, dolor y falta de respeto. Se concluye que el imaginario materno, formado a partir del contexto de salud actual, entiende el parto como un evento temido, que hubieran querido evitar. Está claro que la atención médica brindada hoy en día aún es insuficiente porque no guía correctamente a las mujeres y les impide dominar la escena del parto, dejándolas al margen de la humanización. Se percibe que la atención terapéutica dirigida a las mujeres no se basa en su opinión y sentimiento para respaldar el desempeño, lo que de cierta manera contribuye al mantenimiento de esta imagen negativa sobre el parto y exige un mayor compromiso en relación con las prácticas y la educación permanente.(AU)

Prevalência de parto vaginal após cesárea em uma maternidade de alto risco / Prevalence of vaginal delivery after cesarean in a high-risk maternity / Prevalencia de entrega vaginal después de cesárea en una maternidad de alto riesgo

Objetivo: estimar a prevalência de parto vaginal após cesárea em uma maternidade de alto risco e identificar as complicações maternas e neonatais. Método: trata-se de um estudo transversal, quantitativo e retrospectivo, realizado com 44 mulheres que tiveram parto normal com cesárea prévia, por meio da análise dos prontuários realizou-se a análise descritiva com frequências absolutas e simples. Resultados: a prevalência de parto vaginal após cesárea foi de 13%. Ocorreu complicação em 13,6% das mulheres, porém não houve rotura uterina e em 4,5% dos neonatos. Conclusões: os desfechos favoráveis comprovam a segurança deste procedimento para a mãe e para neonato e servem de estímulo para que os profissionais incentivem as gestantes com cesárea anterior a considerarem a via vaginal como uma possibilidade segura para o próximo parto

Objective: to estimate the prevalence of vaginal delivery after cesarean section in a high-risk maternity and to identify maternal and neonatal complications. Method: this is a cross-sectional, quantitative and retrospective study, carried out with 44 women who had a normal delivery with previous cesarean section, through the analysis of medical records, descriptive analysis was carried out with absolute and simple frequencies. Results: the prevalence of vaginal delivery after cesarean section was 13%. Complication occurred in 13.6% of women, but there was no uterine rupture and in 4.5% of neonates. Conclusions: the favorable outcomes prove the safety of this procedure for the mother and the newborn and serve as a stimulus for professionals to encourage pregnant women with a previous cesarean to consider the vaginal route as a safe possibility for the next delivery

Objetivo: estimar la prevalencia del parto vaginal después de una cesárea en una maternidad de alto riesgo e identificar complicaciones maternas y neonatales. Método: se trata de un estudio transversal, cuantitativo y retrospectivo, realizado con 44 mujeres que tuvieron un parto normal con cesárea previa, a través del análisis de registros médicos, se realizó un análisis descriptivo con frecuencias absolutas y simples. Resultados:la prevalencia del parto vaginal después de una cesárea fue del 13%. La complicación ocurrió en el 13.6% de las mujeres, pero no hubo ruptura uterina y en el 4.5% de los recién nacidos. Conclusiones: los resultados favorables demuestran la seguridad de este procedimiento para la madre y el recién nacido y sirven de estímulo para que los profesionales alienten a las mujeres embarazadas con una cesárea previa a considerar la vía vaginal como una posibilidad segura para el próximo parto

Cesarean-section rates in Brazil from 2014 to 2016: cross-sectional Aanalysis using the robson classification / Taxas de cesariana no Brasil de 2014 a 2016: análise transversal utilizando a classificação de robson

Abstract Objective To obtain cesarean-section (CS) rates according to the Robson Group Classification in five different regions of Brazil. Methods A descriptive epidemiological study using data from secondary birth records fromthe Computer Science Department of the Brazilian Unified Health System (Datasus, in Portuguese) between January 1st, 2014, and December 31st, 2016, including all live births in Brazil. Results The overall rate of CSwas of 56%. The sample was divided into 11 groups, and vaginal births were more frequent in groups 1 (53.6%), 3 (80.0%) and 4 (55.1%). The highest CS rates were found in groups 5 (85.7%), 6 (89.5%), 7 (85.2%) and 9 (97.0%). The overall CS rate per region varied from 46.2% in the North to 62.1% in the Midwest. Group 5 was the largest obstetric population in the South, Southeast and Midwest, and group 3 was the largest in the North and Northeast. Group 5 contributed the most to the overall CS rate, accounting for 30.8% of CSs. Conclusion Over half of the births in Brazil were cesarean sections. The Midwest had the highestCS rates,while theNorth had the lowest. The largestobstetric population in the North and in the Northeast was composed of women in group 3, while in the South, Southeast and Midwest it was group 5. Among all regions, the largest contribution to the overall CS rate was from group 5.

Resumo Objetivo Identificar as taxas de cesárea de acordo com a Classificação de Robson nas cinco regiões do Brasil. Métodos Estudo epidemiológico descritivo utilizando dados secundários obtidos do Departamento de Informática do Sistema Único de Saúde (Datasus) entre 1° de janeiro de 2014 e 31 de dezembro de 2016, incluindo todos os nascidos vivos no Brasil. Resultados Cesáreas representaram 56% de todos os nascimentos. A amostra foi dividida em 11 grupos, e partos vaginais forammais frequentes nos grupos 1 (53,6%), 3(80,0%) e 4 (55,1%). As maiores taxas de cesárea foram encontradas nos grupos 5 (85,7%), 6 (89,5%), 7 (85,2%) e 9 (97,0%). A taxa geral de cesárea variou de 46,2% no Norte a 62,1% no Centro-Oeste. O grupo 5 representou a maior população obstétrica no Sul, Sudeste e Centro-Oeste, e o grupo 3, no Norte e Nordeste. O grupo 5 contribuiu mais para a taxa geral de cesárea, totalizando 30,8%. Conclusão Mais da metade dos nascimentos no Brasil ocorreu por cesárea. O Centro- Oeste apresentou a maior taxa, e o Norte, a mais baixa. A maior população obstétrica no Norte e no Nordeste foi o grupo 3, enquanto no Sul, Sudeste e Centro-Oeste foi o grupo 5. Entre todas as regiões, amaior contribuição para a taxa geral de cesárea foi do grupo 5.

Parto vaginal en gestantes con cesárea previa en un hospital general de Perú / Vaginal birth in pregnant cesarea in a general hospital of Peru

Objetivo: Determinar el perfil clínico y las principales complicaciones maternas perinatales del parto vaginal en gestantes con cesárea previas en el Hospital Santa María del Socorro Ica, en el año 2018. Materiales y métodos: Se realizó un estudio retrospectivo, descriptivo, observacional. Se revisó las historias clínicas de pacientes con embarazo a término normo evolutivo y antecedente de cesárea en alguna gestación previa, que se sometieron a trabajo de parto y culminaron su parto por vía vaginal o abdominal y que fueron atendidas en el Hospital Santa María del Socorro de Ica en el año 2018, se utilizó una ficha de recolección de Datos. Resultados: Se analizaron los datos de 162 gestantes en trabajo de parto, 128 (79%) lograron el nacimiento por vía vaginal, mientras que 34 (21%) tuvieron su finalización del embarazo por vía abdominal. Entre las características sociodemográficas predominó: Las edades entre los 20 y 30 años (80%), el grado de instrucción secundaria (62%), estado civil soltera (41%), ocupación empleada (44%) y de procedencia rural (81%. En relación a las complicaciones maternas: la hemorragia post parto estuvo presente en ambos grupos 5,4% en parto vaginal y 18% en parto abdominal, las diferencias fueron significativas (p<0,05). Respecto al factor perinatal: la patología predominante fue síndrome de distrés respiratorio, igualmente la diferencia estadística fue significativa (p< 0,05). Conclusiones: Las complicaciones maternas en pacientes con parto vaginal o abdominal con antecedentes de cesárea fueron hemorragia post parto y síndrome de distrés respiratorio respectivamente. (AU)

Objective: To determine the clinical profile and the main maternal perinatal complications of vaginal birth in pregnant women with previous caesarean section at the Hospital Santa María del Socorro Ica, in 2018. Materials and methods: A retrospective, descriptive, observational study was carried out. The medical records of patients with a normal evolutionary term pregnancy and a history of caesarean section in a previous pregnancy were reviewed. Ica in the year 2018, you will see a data collection sheet. Results: Data from 162 pregnant women in labor were analyzed, 128 (79%) achieved vaginal birth, while 34 (21%) had their pregnancy terminated by abdominal route. Among the sociodemographic characteristics predominated: The ages between 20 and 30 years (80%), the degree of secondary education (62%), single marital status (41%), employed occupation (44%) and of rural origin (81% In relation to maternal complications: postpartum hemorrhage was present in both groups 5.4% in vaginal delivery and 18% in abdominal delivery, the differences were severe (p <0.05). Regarding the perinatal factor: the pathology predominantly it was respiratory distress syndrome, the statistical difference was also significantly significant (p<0.05). Conclusions: Maternal complications in patients with vaginal or abdominal delivery with a history of caesarean section were postpartum hemorrhage and respiratory distress syndrome respectively. (AU)

Validation of a predictive model for successful vaginal birth after cesarean section / Validación de modelos predictivos para parto vaginal exitoso después de cesárea

Abstract Introduction: A strategy for reducing the number of cesarean sections is to allow vaginal delivery after cesarean section. Objective: To validate two predictive models, Metz and Grobman, for successful vaginal delivery after a cesarean section. Methods: Retrospective cohort study involving women with previous history of a previous segmental cesarean section, single pregnancy ≥37 weeks and cephalic presentation. The proportion of vaginal delivery in all pregnant women was determined, and it was compared with those (women) with successful delivery after cesarean section. Then, there were elaborated the models, and their predictive capacity was determined by curve-receiver-operator. Results: The proportion of successful delivery in pregnant women with a previous cesarean section and indication of vaginal delivery was 85.64%. The observed proportion of birth for each decile predicted in the Grobman model was less than 15%, except for the 91-100% decile, where it was 64.09%; the area under the curve was 0.95. For the Metz model, the actual successful delivery rate was lower than predicted in scores between 4 and 14, and within expected for a score between 15 and 23; the area under the curve was 0.94. Conclusions: The vaginal delivery rate after cesarean was lower than expected according to the predictive models of Grobman and Metz. The implementation of these models in a prospective way can lead to a higher rate of successful birth.

Resumen Introducción: Una estrategia de reducción del número de cesáreas es permitir el parto vaginal después de cesárea. Objetivo: Validar dos modelos predictivos, Metz y Grobman, para el parto vaginal exitoso después de una cesárea. Métodos: Estudio de cohorte retrospectivo con mujeres con antecedente de una cesárea segmentaria previa, embarazo único ≥37 semanas y presentación cefálica . Se determinó la proporción de parto vaginal en todas las gestantes y se comparó con aquellas con parto exitoso después de cesárea, se elaboró los modelos y se determinó la capacidad predictiva de ellos mediante curva-receptor-operador. Resultados: La proporción de parto exitoso en gestantes con cesárea previa e indicación de parto vaginal fue 85.64%. La proporción de parto observado para cada decil predicho en el modelo de Grobman fue inferior al 15%, excepto para el decil 91-100%, en el que fue 64.09%, el área bajo la curva fue 0.95. Para el modelo de Metz, la proporción de parto exitoso real fue menor a lo predicho en puntajes entre 4-14 y dentro de lo esperado para puntaje entre 15-23, con un área bajo la curva de 0.94. Conclusiones: La tasa de parto vaginal después de cesárea fue menor a lo esperado de acuerdo a los modelos predictivos de Grobman y Metz. La implementación de estos modelos en forma prospectiva puede llevar una mayor tasa de parto exitoso.

Obstetric outcome of induction of labor using prostaglandin gel in patients with previous one cesarean section

OBJECTIVE: After globally acceptance of planned vaginal birth after cesarean section (VBAC), the mode of induction is still a matter of debate and requires further discussion. We aimed to study obstetric outcomes in post-cesarean patients undergoing induction of labor with prostaglandin gel compared with patients who developed spontaneous labor pains. METHODS: All patients at 34 weeks or more of gestation with previous one cesarean section eligible for trial of labor after cesarean section admitted in a labor room within one year were divided in 2 groups. Group one consisted of patients who experienced the spontaneous onset of labor pains and group 2 consisted of patients who underwent induction of labor with prostaglandin gel. They were analyzed for maternofetal outcomes. Descriptive statistics, independent sample t-test, and chi-square test were applied using SPSS 20 software for statistical analysis. RESULTS: Both groups were comparable in maternal age, parity, and fetal weight, but different in bishop score, mode of delivery, and neonatal outcome. Admisson bishop score was 6.61±2.51 in group 1 and 3.15±1.27 in group 2 (P<0.005). In the patients who experienced spontaneous labor, 86.82% had successful VBAC. In the patients with induced labor, 64.34% had successful VBAC with an average dose of gel of 1.65±0.75. Both groups had one case each of uterine rupture. The neonatal intensive care unit admission rate was 4.1% in group one and 10.4% in group 2. CONCLUSION: This study reflects that supervised labor induction with prostaglandin gel in previous one cesarean section patients is a safe and effective option.

Labor Onset, Oxytocin Use, and Epidural Anesthesia for Vaginal Birth after Cesarean Section and Associated Effects on Maternal and Neonatal Outcomes in a Tertiary Hospital in China: A Retrospective Study / 中华医学杂志(英文版)

<p><b>Background</b>In the mainland of China, the trial of labor after cesarean section is still a relatively new technique. In this study, we aimed to investigate the effects of labor onset, oxytocin use, and epidural anesthesia on maternal and neonatal outcomes for vaginal birth after cesarean section (VBAC) in a tertiary hospital in China.</p><p><b>Methods</b>This was a retrospective study carried out on 212 VBAC cases between January 2015 and June 2017 in Beijing Obstetrics and Gynecology Hospital, Capital Medical University. Relevant data were acquired on a form, including maternal age, gravidity and parity, body mass index before pregnancy, weight gain during pregnancy, type of labor onset, gestational age, the use of oxytocin and epidural anesthesia, birth mode, the duration of labor, and neonatal weight. The factors affecting maternal and neonatal outcomes for cases involving VBAC, especially with regards to postpartum hemorrhage (PPH) and fetal distress, were evaluated by univariate analysis and multivariable logistic regression.</p><p><b>Results</b>Data showed that 36 women (17.0%) had postpartum hemorrhage (PPH) and 51 cases (24.1%) featured fetal distress. Normal delivery took place for 163 infants (76.9%) while 49 infants (23.1%) underwent operative vaginal deliveries with forceps. There were 178 cases (84.0%) of spontaneous labor and 34 cases (16.0%) required induction. Oxytocin was used in 54 cases (25.5%) to strengthen uterine contraction, and 65 cases (30.7%) received epidural anesthesia. The rate of normal delivery in cases involving PPH was significantly lower than those without PPH (61.1% vs. 80.1%; χ = 6.07, P = 0.01). Multivariate logistic analysis showed that the intrapartum administration of oxytocin (odds ratio [OR] = 2.47; 95% confidence interval [CI] = 1.07-5.74; P = 0.04) and birth mode (OR = 0.40; 95% CI = 0.18-0.87; P = 0.02) was significantly associated with PPH in VBAC cases. Operative vaginal delivery occurred more frequently in the group with fetal distress than the group without (49.0% vs. 14.9%, χ = 25.36, P = 0.00). Multivariate logistic analysis also revealed that the duration of total labor (OR = 1.01; 95% CI = 1.00-1.03; P = 0.04) and the gestational week of delivery (OR = 1.08; 95% CI = 1.05-1.11; P = 0.00) were significantly associated with fetal distress in VBAC.</p><p><b>Conclusions</b>The administration of oxytocin during labor and birth was identified as a protective factor for PPH in VBAC while birth mode was identified as a risk factor. Finally, the duration of total labor and the gestational week of delivery were identified as risk factors for fetal distress in cases of VBAC. This information might help obstetricians provide appropriate interventions during labor and birth for VBAC.</p>

Tasa de cesáreas por grupos de Robson en una institución de mediana complejidad de la ciudad de Bogotá, 2012-2014 / Cesarean section rate by Robson groups in an intermediate complexity centre in the city of Bogotá, 2012-2014

Introducción: la clasificación de Robson permite caracterizar las mujeres a las que se les realiza cesárea con el fin de implementar estrategias focalizadas con éxito. El objetivo fue determinar las tasas específicas de cesárea según la clasificación de Robson en una institución hospitalaria de mediana complejidad. Materiales y métodos: estudio descriptivo transversal que incluyó mujeres atendidas en un hospital público de atención general, que recibe pacientes del aseguramiento subsidiado por el Estado, entre 2012 y 2014. Se llevó a cabo muestreo aleatorio estratificado según la vía del parto, basado en la razón parto/cesárea encontrada en el periodo, clasificando las mujeres atendidas en los 10 grupos de Robson. Se realizó el análisis descriptivo de las variables demográficas, indicaciones clínicas reportadas y las proporciones global y específica de uso de cesárea en cada grupo. El estudio contó con aprobación del comité de ética institucional. Resultados: se seleccionaron 1.190 de 6.558 nacimientos ocurridos durante el periodo. La proporción global de cesárea fue de 36,9 %. Las mujeres nulíparas contribuyeron con el 38,5 % de las cesáreas, seguidas por el grupo con cesárea anterior (36,4 %) que tuvo una proporción específica del 100 %. La proporción específica de cesárea en el grupo de mujeres nulíparas en trabajo de parto espontáneo fue 36,6 % y la del grupo de partos prematuros 43,3 %. Conclusiones: las mujeres con cesárea anterior, con embarazo pretérmino y las nulíparas en parto espontáneo o inducido tienen las proporciones específicas más elevadas de cesárea. Estos grupos podrían ser susceptibles de intervención para impactar las tasas de cesárea de la institución.

Introduction: The Robson classification is useful for characterizing women taken to Cesarean section with the aim of implementing successful focused strategies. The objective was to determine specific Cesarean section rates according to the Robson classification in an intermediate complexity hospital. Materials and methods: cross-sectional descriptive study that included women of the state-subsidized health insurance regime seen at a general public hospital between 2012 and 2014. A stratified random sampling was performed on the basis of the birth route, per delivery, based on the delivery/Cesarean section ratio found during the time period. The women were classified under 10 Robson groups. A descriptive analysis was conducted of the demographic variables, the clinical indications reported, and the overall and specific proportions of Cesarean sections in each group. The study was approved by the Ethics Committee of the Institution. Results: Out of 6558 deliveries during the study period, 1190 were selected. The overall proportion of Cesarean sections was 36.9%. Nulliparous women accounted for 38.5% of the Cesarean sections, followed by the group with previous Cesarean sections (36.4%) for which the specific proportion was 100%. The specific proportion of Cesarean sections in nulliparous women in spontaneous labour was 36.6%, whereas it was 43.3% in the premature delivery group. Conclusions: The highest specific proportions of Cesarean section were found among women with a previous Cesarean section, women with pre-term delivery and nulliparous women with spontaneous or induced delivery. These groups could lend themselves for intervention in order to have an impact on the rates of Cesarean section in the Institution.