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.

Vaginal birth after one caesarean section: analysis of indicators of success.

A study was carried out among 81 women with previous one caesarean section (CS) done for non-recurrent indications to confirm the efficacy and safety of trial of labour (TOL) and to examine the effect of various factors on the mode of delivery. Singleton term pregnancy, vertex presentation and adequate pelvic capacity were the pre-requisites for case selection. Careful monitoring was done during labour and effect of various factors on the outcome was analysed statistically. Success rate of TOL was 73%. A non-recurrent indication for previous CS, such as malpresentation and foetal distress is associated with higher success rate of vaginal birth after caesarean (VBAC) compared to recurrent indications, such as cephalopelvic disproportion (CPD) and failure to progress (FTP). Prior vaginal birth improves the success rate (87%) of VBAC. Factors like premature rupture of membranes, hypertensive disorders of pregnancy, and post-date pregnancy did not affect the outcome adversely. Rate of emergency CS was 44% in women with floating head foetus, 39% in induction/augmentation group and 43% when birth weight of the foetus was > 3000 g. No maternal/perinatal mortality observed. Maternal/perinatal morbidity was low in cases with successful TOL. Uterine rupture occurred in one woman. There are few absolute contra-indications to attempted VBAC. Though the success rate does vary with different pre-existing factors, the clinician may anticipate greater than 50% chance for success in any individual labour.

Nacimiento por parto vaginal despues de una cesarea. prueba de trabajo de parto versus cesarea electiva a repeticion: rotura uterina, una complicacion posible

El parto vaginal después de una cesárea tiene un éxito superior al 70%. Bajo ciertas condiciones, es considerado seguro, y con una baja probabilidad de complicaciones. Sin embargo, cuando estas ocurren, pueden resultar catastróficas para el feto y la madre. Una de las más temidas es la rotura uterina, que puede ocurrir en menos del 1%. A través de una serie de preguntas y respuestas pretendemos revisar algunas de las principales inquietudes sobre el tema.