Background: Caesarean section rates are increasing globally and iterative CS tends to contribute significantly to the increased rates of this widespread surgery. VBAC appears to be a viable real option for pre-cesarean women who do not present labour exclusion criteria. Often the end of pregnancy coincides with the need to resort to induction of labour, but in VBAC a number of risk factors coexist that make the choice of induction method, as well as its timing, more difficult. Aim of the study: The primary objective is to evaluate the different methods of induction in labour in pre-cesarian patients, taking into account certain factors such as the characteristics of the patients on admission, maternal and neonatal outcomes. Materials and methods: For the conduct of the study, a literature review was first performed centred on the pivotal topics of the study, i.e. caesarean section, trial labour after caesarean section and induction of labour with specific focus on women with prev CS. The literature review was conducted by consulting the Pubmed and Cochrane Library databases. In addition, guidelines from different societies were considered.186 pregnant women with previous CS who gave birth at the Obstetric Clinic of Padua between December 2021 and September 2022 were considered for the study. Data collection was performed by consulting the paper medical records in the archives of the Clinic and the Obstetric Division of the Hospital of Padua. Data relevant to the study were organised in Excel spreadsheets, while statistical analyses, tables and graphs were performed using SPSS Statistics software. Results: With regard to characteristics to determine maternal outcome, data regarding ethnicity, age of birth and gestational age at the time of delivery, number of previous caesarean sections and vaginal deliveries, indication for previous caesarean section, consent to trial labour, mode of delivery, Bishop's score at the time of admission and induction method applied were considered. The neonatal characteristics examined to determine the outcome were cord pH at birth, base excess and weight.Analysing the total population considered, caesarean section was performed again in 72% of cases, 109 women, or 58% of the total, had no exclusion criteria for TOLAC, but only 62 women wished to undertake trial labour.TOLAC resulted in vaginal delivery in 83% of cases. The data concerning induction of labour in women with a previous CS were significant as induction was used in 69% of women. Induced VBAC was also successful in the majority of cases (84%). Neonatal data reflect those in the literature in that pH and BE tend to be lower in vaginal births than in Caesarean section births. Conclusions: The study shows that VBAC and induced VBAC have a positive outcome in most cases. Despite this, the current evidence as well as the results of this study are not sufficient to make recommendations on one induction method rather than another. The availability of large, high-quality databases can certainly lead to research and audits that are more in line with clinical practice.
Background: I tassi di taglio cesareo sono in aumento a livello globale e il TC iterativo tende a contribuire in modo significativo all’aumento percentuale di questo intervento chirurgico così diffuso. Il VBAC risulta essere un’opzione reale praticabile per le donne precesarizzate che non presentano criteri di esclusione al travaglio di parto. Spesso il termine di una gravidanza coincide con la necessità di ricorrere all’induzione del travaglio di parto, ma nel VBAC coesistono una serie di fattori di rischio che rendono più difficoltosa la scelta del metodo di induzione, così come il timing dello stesso. Scopo dello studio:L’obiettivo primario è quello di andare a valutare i diversi metodi di induzione nel travaglio di parto in pazienti precesarizzate, considerando alcuni fattori come le caratteristiche delle pazienti al momento del ricovero, l’outcome materno e quello neonatale. Materiali e metodi: Per la realizzazione dello studio, è stata dapprima eseguita una revisione della letteratura centrata sui temi cardini dello studio, ossia il taglio cesareo, il travaglio di prova dopo taglio cesareo e l’induzione del travaglio con focus specifico sulle donne precesarizzate. La revisione della letteratura è stata condotta mediante consultazione delle banche dati Pubmed e Cochrane Library. Inoltre, sono state considerate le linee guida di diverse società.Per lo studio sono state prese in considerazione 186 gravide precesarizzate che hanno partorito presso la Clinica Ostetrica di Padova tra dicembre 2021 e settembre 2022. La raccolta dei dati è stata eseguita mediante la consultazione delle cartelle cliniche cartacee presenti negli archivi della Clinica e della Divisione Ostetrica dell’Ospedale di Padova. I dati rilevanti per lo studio sono stati organizzati in fogli di calcolo Excel, mentre le analisi statistiche, le tabelle e i grafici sono stati realizzati con l’ausilio del software SPSS Statistics. Risultati: Per quanto riguarda le caratteristiche atte determinare l’outcome materno sono stati considerati i dati riguardanti l’etnia, l’età anagrafica e l’età gestazionale al momento del parto, il numero di precedenti interventi di taglio cesareo e parti vaginali, l’indicazione al precedente taglio cesareo, il consenso al travaglio di parto di prova, la modalità di espletamento del parto, il punteggio di Bishop al momento del ricovero e il metodo di induzione applicato. Le caratteristiche neonatali prese in esame per determinare l’outcome sono state il pH cordonale alla nascita, l’eccesso di basi e il peso.Analizzando il totale della popolazione considerata , il taglio cesareo è stato nuovamente eseguito nel 72% dei casi, 109 donne, pari al 58% sul totale, non presentavano criteri di esclusione al TOLAC, ma solo 62 donne hanno voluto intraprendere il travaglio di parto di prova.Il TOLAC è esitato in parto vaginale nell’83% dei casi. I dati riguardanti l’induzione del travaglio nelle precesarizzate sono risultati essere significativi in quanto il ricorso all’induzione ha interessato il 69% delle donne. Anche il VBAC indotto ha esito positivo nella maggior parte dei casi (84%). I dati neonatali riflettono quelli presenti in letteratura in quanto pH e BE tendono a essere inferiori nei nati da parto vaginale rispetto ai nati da taglio cesareo. Conclusioni: Lo studio evidenzia che il VBAC e il VBAC indotto hanno nella maggior parte dei casi un esito positivo. Nonostante questo, le evidenze attuali così come i risultati di questo studio non risultano essere sufficienti nel formulare raccomandazioni su un metodo di induzione piuttosto che un altro. La disponibilità di database ampi e di qualità può sicuramente portare alla conduzione di ricerche e audit più più aderenti alla pratica clinica.
Studio sui metodi di induzione nel VBAC
SANTI, EMMA
2021/2022
Abstract
Background: Caesarean section rates are increasing globally and iterative CS tends to contribute significantly to the increased rates of this widespread surgery. VBAC appears to be a viable real option for pre-cesarean women who do not present labour exclusion criteria. Often the end of pregnancy coincides with the need to resort to induction of labour, but in VBAC a number of risk factors coexist that make the choice of induction method, as well as its timing, more difficult. Aim of the study: The primary objective is to evaluate the different methods of induction in labour in pre-cesarian patients, taking into account certain factors such as the characteristics of the patients on admission, maternal and neonatal outcomes. Materials and methods: For the conduct of the study, a literature review was first performed centred on the pivotal topics of the study, i.e. caesarean section, trial labour after caesarean section and induction of labour with specific focus on women with prev CS. The literature review was conducted by consulting the Pubmed and Cochrane Library databases. In addition, guidelines from different societies were considered.186 pregnant women with previous CS who gave birth at the Obstetric Clinic of Padua between December 2021 and September 2022 were considered for the study. Data collection was performed by consulting the paper medical records in the archives of the Clinic and the Obstetric Division of the Hospital of Padua. Data relevant to the study were organised in Excel spreadsheets, while statistical analyses, tables and graphs were performed using SPSS Statistics software. Results: With regard to characteristics to determine maternal outcome, data regarding ethnicity, age of birth and gestational age at the time of delivery, number of previous caesarean sections and vaginal deliveries, indication for previous caesarean section, consent to trial labour, mode of delivery, Bishop's score at the time of admission and induction method applied were considered. The neonatal characteristics examined to determine the outcome were cord pH at birth, base excess and weight.Analysing the total population considered, caesarean section was performed again in 72% of cases, 109 women, or 58% of the total, had no exclusion criteria for TOLAC, but only 62 women wished to undertake trial labour.TOLAC resulted in vaginal delivery in 83% of cases. The data concerning induction of labour in women with a previous CS were significant as induction was used in 69% of women. Induced VBAC was also successful in the majority of cases (84%). Neonatal data reflect those in the literature in that pH and BE tend to be lower in vaginal births than in Caesarean section births. Conclusions: The study shows that VBAC and induced VBAC have a positive outcome in most cases. Despite this, the current evidence as well as the results of this study are not sufficient to make recommendations on one induction method rather than another. The availability of large, high-quality databases can certainly lead to research and audits that are more in line with clinical practice.The text of this website © Università degli studi di Padova. Full Text are published under a non-exclusive license. Metadata are under a CC0 License
https://hdl.handle.net/20.500.12608/38356