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Dong T, Chen X, Zhao B, Jiang Y, Chen Y, Lv M, Pu Y, Chen G, Xu J, Luo Q. Development of prediction models for successful external cephalic version and delivery outcome. Arch Gynecol Obstet 2021; 305:63-75. [PMID: 34128125 DOI: 10.1007/s00404-021-06115-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Accepted: 06/02/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVE To develop prediction models for the chance of successful external cephalic version (ECV) and delivery outcome. STUDY DESIGN This is a single-center retrospective study including 350 pregnant women with a singleton non-cephalic pregnancy at or after 36 weeks of gestational age. We selected 22 factors for ECV prediction and 21 for delivery outcome after successful ECV prediction as candidate predictors. Multivariable logistic regression with a stepwise backward selection procedure was used to construct a prediction model for the chance of successful ECV and the other for the delivery outcome. The discrimination and calibration of the models were assessed and internal validation was done with bootstrapping. RESULTS ECV was successfully performed in 232 cases (66.3%) among 343 women. Eight predictive factors were identified to be associated with a successful ECV: Gestational week at ECV < 39 weeks, multiparous, BMI before pregnancy < 22 kg/m3, palpable fetal head, breech engagement, larger AFI, larger BPD and posterior placenta. This model showed good calibration and good discrimination (c-statistic = 0.82, 95% CI 0.76-0.88). Six predictive factors were identified to be associated with vaginal delivery after successful ECV: age < 35, multiparous, BMI before pregnancy < 22 kg/m3, anterior placenta, lateral placenta and none-front fetal spine position. This model showed fair discrimination (c-statistic = 0.79, 95% CI 0.72-0.85). However, its calibration was not so satisfactory especially when the predicted probability was low. CONCLUSION We validated a prediction model for ECV and delivery outcome, showing that the model's overall performance is good. This can be used in clinical practice after external validation.
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Affiliation(s)
- Tian Dong
- Department of Obstetrics Women's Hospital, Zhejiang University School of Medicine, 1st Xueshi Road, Hangzhou, 310006, Zhejiang, China
| | - Xinjie Chen
- Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Baihui Zhao
- Department of Obstetrics Women's Hospital, Zhejiang University School of Medicine, 1st Xueshi Road, Hangzhou, 310006, Zhejiang, China
| | - Ying Jiang
- Department of Obstetrics Women's Hospital, Zhejiang University School of Medicine, 1st Xueshi Road, Hangzhou, 310006, Zhejiang, China
| | - Yuan Chen
- Department of Obstetrics Women's Hospital, Zhejiang University School of Medicine, 1st Xueshi Road, Hangzhou, 310006, Zhejiang, China
| | - Min Lv
- Department of Obstetrics Women's Hospital, Zhejiang University School of Medicine, 1st Xueshi Road, Hangzhou, 310006, Zhejiang, China
| | - Yuqun Pu
- Department of Obstetrics Women's Hospital, Zhejiang University School of Medicine, 1st Xueshi Road, Hangzhou, 310006, Zhejiang, China
| | - Guangdi Chen
- Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Jian Xu
- Department of Obstetrics Women's Hospital, Zhejiang University School of Medicine, 1st Xueshi Road, Hangzhou, 310006, Zhejiang, China.
| | - Qiong Luo
- Department of Obstetrics Women's Hospital, Zhejiang University School of Medicine, 1st Xueshi Road, Hangzhou, 310006, Zhejiang, China.
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Birene B, Ishaque U, Chrusciel J, Bonneau S, Gabriel R, Graesslin O. Influence of the external cephalic version attempt on the Cesarean section rate: experience of a type 3 maternity hospital in France. Arch Gynecol Obstet 2020; 303:443-454. [PMID: 32895742 DOI: 10.1007/s00404-020-05765-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Accepted: 08/24/2020] [Indexed: 11/29/2022]
Abstract
PURPOSE To define the effects of attempted external cephalic version (ECV) in a low-risk population for breech delivery in a maternity hospital where breech vaginal delivery is widely practiced. MATERIALS AND METHODS Retrospective exposed-unexposed study including 204 patients presented with a live singleton fetus breech presentation on third-trimester ultrasound and who delivered at Reims University Hospital between January 1st, 2013 and July 1st, 2018. RESULTS 121 patients received ECV. Cesarean section rate was lower (OR with no adjustment 0.42 [0.24-0.76] p = 0.004) but without significant difference in the exposed patients after adjustment. This difference was significant between exposed and unexposed patients in the subgroup of 51 primiparous (OR = 0.14 [0.04-0.52] p = 0.002) and 51 multiparous (OR = 0.26 [0.08-0.89] p = 0.028) but not in the subgroup of 102 nulliparous. There was no difference in fetal impact other than neonatal management in the delivery room, which is less needed in exposed primiparous women. Attempted ECV significantly decreased the breech rate (72.5 vs 100%, p < 0.001). There were 7 (5.79%) complications. Three factors favored success: high uterine height (p = 0.011), a non-elevated BMI (p = 0.006) and an earlier term at ECV (p = 0.003). CONCLUSION The attempt of ECV in the Reims University Hospital does not significantly reduce the Cesarean section rate and has no effect on neonatal status.
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Affiliation(s)
- Benjamin Birene
- Department of Obstetrics and Gynecology, Reims University Hospital, Reims, France.
| | - U Ishaque
- Department of Obstetrics and Gynecology, Reims University Hospital, Reims, France
| | - J Chrusciel
- Department of Research and Public Health, Reims University Hospital, Reims, France
| | - S Bonneau
- Department of Obstetrics and Gynecology, Reims University Hospital, Reims, France
| | - R Gabriel
- Department of Obstetrics and Gynecology, Reims University Hospital, Reims, France
| | - O Graesslin
- Department of Obstetrics and Gynecology, Reims University Hospital, Reims, France
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Wastlund D, Moraitis AA, Dacey A, Sovio U, Wilson ECF, Smith GCS. Screening for breech presentation using universal late-pregnancy ultrasonography: A prospective cohort study and cost effectiveness analysis. PLoS Med 2019; 16:e1002778. [PMID: 30990808 PMCID: PMC6467368 DOI: 10.1371/journal.pmed.1002778] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 03/11/2019] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Despite the relative ease with which breech presentation can be identified through ultrasound screening, the assessment of foetal presentation at term is often based on clinical examination only. Due to limitations in this approach, many women present in labour with an undiagnosed breech presentation, with increased risk of foetal morbidity and mortality. This study sought to determine the cost effectiveness of universal ultrasound scanning for breech presentation near term (36 weeks of gestational age [wkGA]) in nulliparous women. METHODS AND FINDINGS The Pregnancy Outcome Prediction (POP) study was a prospective cohort study between January 14, 2008 and July 31, 2012, including 3,879 nulliparous women who attended for a research screening ultrasound examination at 36 wkGA. Foetal presentation was assessed and compared for the groups with and without a clinically indicated ultrasound. Where breech presentation was detected, an external cephalic version (ECV) was routinely offered. If the ECV was unsuccessful or not performed, the women were offered either planned cesarean section at 39 weeks or attempted vaginal breech delivery. To compare the likelihood of different mode of deliveries and associated long-term health outcomes for universal ultrasound to current practice, a probabilistic economic simulation model was constructed. Parameter values were obtained from the POP study, and costs were mainly obtained from the English National Health Service (NHS). One hundred seventy-nine out of 3,879 women (4.6%) were diagnosed with breech presentation at 36 weeks. For most women (96), there had been no prior suspicion of noncephalic presentation. ECV was attempted for 84 (46.9%) women and was successful in 12 (success rate: 14.3%). Overall, 19 of the 179 women delivered vaginally (10.6%), 110 delivered by elective cesarean section (ELCS) (61.5%) and 50 delivered by emergency cesarean section (EMCS) (27.9%). There were no women with undiagnosed breech presentation in labour in the entire cohort. On average, 40 scans were needed per detection of a previously undiagnosed breech presentation. The economic analysis indicated that, compared to current practice, universal late-pregnancy ultrasound would identify around 14,826 otherwise undiagnosed breech presentations across England annually. It would also reduce EMCS and vaginal breech deliveries by 0.7 and 1.0 percentage points, respectively: around 4,196 and 6,061 deliveries across England annually. Universal ultrasound would also prevent 7.89 neonatal mortalities annually. The strategy would be cost effective if foetal presentation could be assessed for £19.80 or less per woman. Limitations to this study included that foetal presentation was revealed to all women and that the health economic analysis may be altered by parity. CONCLUSIONS According to our estimates, universal late pregnancy ultrasound in nulliparous women (1) would virtually eliminate undiagnosed breech presentation, (2) would be expected to reduce foetal mortality in breech presentation, and (3) would be cost effective if foetal presentation could be assessed for less than £19.80 per woman.
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Affiliation(s)
- David Wastlund
- Cambridge Centre for Health Services Research, Cambridge Institute of Public Health, Cambridge, United Kingdom
- The Primary Care Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom
| | - Alexandros A. Moraitis
- Department of Obstetrics and Gynaecology, University of Cambridge, NIHR Cambridge Comprehensive Biomedical Research Centre, Cambridge, United Kingdom
| | - Alison Dacey
- Department of Obstetrics and Gynaecology, University of Cambridge, NIHR Cambridge Comprehensive Biomedical Research Centre, Cambridge, United Kingdom
| | - Ulla Sovio
- Department of Obstetrics and Gynaecology, University of Cambridge, NIHR Cambridge Comprehensive Biomedical Research Centre, Cambridge, United Kingdom
| | - Edward C. F. Wilson
- Cambridge Centre for Health Services Research, Cambridge Institute of Public Health, Cambridge, United Kingdom
- Health Economics Group, Norwich Medical School, University of East Anglia, Norwich, United Kingdom
| | - Gordon C. S. Smith
- Department of Obstetrics and Gynaecology, University of Cambridge, NIHR Cambridge Comprehensive Biomedical Research Centre, Cambridge, United Kingdom
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Fullerton J, Butler M, Aman C, Reid T. Global competencies for midwives: external cephalic version; ultrasonography, and tobacco cessation intervention. Women Birth 2018; 32:e413-e420. [PMID: 30174206 DOI: 10.1016/j.wombi.2018.08.166] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 08/17/2018] [Accepted: 08/21/2018] [Indexed: 11/16/2022]
Abstract
PROBLEM AND BACKGROUND The International Confederation of Midwives (ICM) conducts regular updates to the Essential Competencies for Basic Midwifery Practice to determine the introduction or retention of items in the global scope of midwifery practice guidance document. AIM This article presents the review process that underpinned the deliberation about three specific clinical practices: external cephalic version, prenatal ultrasonography, and tobacco cessation interventions that occurred during the 2016-2017 global update study. METHODS A brief outline of the research methodology used in the 2016-2017 study is provided. Literature summaries about safety and effectiveness of three clinical skills are offered. Data addressing global and regional variations in support of each practice and final disposition of the items are documented. FINDINGS External cephalic version did not receive sufficient document support for inclusion in the initial list of items to be tested in the study. Prenatal ultrasonography was supported as an advanced (76.6%) or country-specific (18.8%) skill that midwives could acquire, to promote wider global access for pregnant women. Midwives' participation in tobacco cessation counselling was supported (≥85%) in each of ICM's regions. Knowledge about World Health Organization recommendations for nicotine replacement therapy was endorsed as an additional (62.4%) or country-specific (29.3%) skill. DISCUSSION AND CONCLUSION The current evidence of safety of midwives performing external cephalic version led to the recommendation that it be considered in the next document update. Conflicting views of midwives' role in acquiring skills to conduct prenatal ultrasound were evident. There was strong support for participation in smoking cessation counselling, but knowledge of World Health Organization recommendations was not highly endorsed.
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Affiliation(s)
| | - Michelle Butler
- Faculty of Science and Health, Dublin City University, Glasnevin, Dublin 9, Ireland.
| | - Cheryl Aman
- Midwifery Program, Department of Family Practice, University of British Columbia, Vancouver, BC, Canada.
| | - Tobi Reid
- Midwifery Program, Department of Family Practice, University of British Columbia, Vancouver, BC, Canada.
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