Risk Factors Associated with Unsuccessful Vaginal Birth after One Cesarean (VBAC-1) in Puerto Rico

Background: Cesarean section (CS) has increased steadily over the last decade, with an estimated one-third of women delivering by cesarean section worldwide. Objective: Our study aimed to investigate the demographic and associated factors influencing vaginal birth after one cesarean (VBAC-1) success focusing on variables like pre-pregnancy BMI, diabetes, hypertension, education, and smoking. Study Design and Methods: In this retrospective study, we analyzed 285 cases (81 unsuccessful VBAC-1, 204 successful VBAC-1) from San Juan City Hospital (Puerto Rico) between January 1, 2019, and December 31, 2020. We used odds ratios and model selection comparison to assess the impact of variables on successful VBAC-1, using a significance threshold of 95% CI. Model selection assessed binomial model combinations using a generalized linear approach to identify key risk factors. Results: Unsuccessful VBAC-1 (a repeat cesarean), was associated with diabetes (OR: 0.376, p = 0.086), hypertension (OR: 0.23, p = 0.006), and university-educated women (OR: 1.372, p = 0.711). High school-educated women had an OR of 3.966 (p = 0.105), while overweight women were 0.481 times more likely to have unsuccessful VBAC-1 (p = 0.041). Significant associations were not found with obesity (OR: 0.574, p = 0.122), underweight/normal (OR: 1.01, p = 0.810), or smoking (OR: 1.227, p = 0.990). Conclusion: Results revealed women with higher education levels, hypertension, or diabetes are less likely to have a successful VBAC-1. Understanding the complex interactions affecting these outcomes is aimed at establishing guidelines for healthcare professionals to conduct systematic risk/benefit assessments. This study lays a foundation for evidence-based practices and policies, offering initial insights into VBAC-1 success factors in Puerto Rico.

Vaginal Birth after Cesarean after Zavanelli Maneuver: A Woman’s Right to Choose

Introduction: Vaginal birth after cesarean (VBAC) plays an essential role in lowering cesarean rates. Despite endorsement, trial of labor after cesarean (TOLAC) attempt rates remain low, in part due to fear of lawsuits. Zavanelli maneuver is a last resort procedure in the management of shoulder dystocia. We discuss a case of a woman determined to have a vaginal birth after her prior birth was complicated by shoulder dystocia requiring a Zavanelli maneuver. Her physicians were reluctant to allow her a TOLAC given her prior obstetric history. Case: A 34-year-old para 1 with prior cesarean delivery due to shoulder dystocia that required Zavanelli maneuver presents determined to pursue VBAC in her current pregnancy. She considered her delivery route options and addressed her modifiable risk factors. She consulted with multiple perinatologists who agreed that a TOLAC was reasonable, however she had to travel more than 70 miles (from Pennsylvania to New Jersey) to find an obstetrical practice and hospital willing to consider VBAC. She transferred care and the remainder of her prenatal course was uncomplicated. She went into labor at 41 weeks and had a successful VBAC without complication. In a thank you letter to her obstetrician, she described her birth experience as euphoric. Conclusion: This case illustrates how a woman’s choice of delivery route may be impacted by fear of litigation. Local providers focused on her prior delivery instead of her overall improved risk profile. Delivery route decisions should be based on a thorough evaluation of all risk factors and individualized to meet the reproductive goals of each woman. .

Pre-Induction Cervical Ripening Using a Transcervical Foley Catheter Combined with ISMN Vaginal Tablets for Vaginal Birth after Previous Caesarean Section (VBAC)—A Comparative Study

Objective: To compare the effectiveness, safety and client acceptability of concurrent application of transcervical Foley catheter with vaginal ISMN-sustained release (SR) 60 mg tablet versus transcervical Foley catheter alone for pre-induction cervical ripening in women who are undergoing Vaginal birth after C-section (VBAC). Method: A prospective single blind randomized control study was carried out including 110 pregnant women who had unfavorable cervix (MBS less than 6) at 40 weeks and 3 days of gestation. The two groups received either the trans-cervical foley catheter with a vaginal ISMN 60 mg sustained release (SR) tablet on 40 weeks and 3 days (Treatment arm 1, n = 57), or trans-cervical Foley alone on 40 weeks and 3 days (Treatment arm 2, n = 53). Results: At 40 weeks + 3 days gestation, the mean age, mean parity and the mean modified Bishop Score (MBS) were comparable among the two treatment groups. Majority (n = 98, 89.1%) remained without spontaneously establishing labour at 24 hours of intervention. The difference in mean MBS at 40 weeks + 4 days (24-hours following the intervention) in the two groups was statistically not significant (P > 0.05). The group who received concurrent ISMN vaginal tablets achieved a higher number of successful VBACs (n = 33, 62.3%) over the group who received the Foley catheter only method (n = 29, 50.9%), however, not statistically significant (P > 0.05). Conclusions: The concurrent use of vaginal ISMN tablets (60 mg SR) with a transcervical Foley catheter failed to show higher effectiveness compared to a transcervical Foley catheter alone as an induction method.

Comparative study for success rate of vaginal birth after cesarean section following labor induction by two forms of vaginal dinosprostone: A pilot study

Background: Cesarean delivery has become the most common major surgical procedure in many parts of the world. Induction of labor in women with prior cesarean delivery is an alternative to mitigate the rising cesarean rates. Objectives: To compare the VBAC success rate between two vaginal forms of dinoprostone for labor induction in women with prior cesarean section. Material and Methods: A pilot study was conducted at a large Governmental Hospital, Dhahran, Saudi Arabia, including 200 women with prior cesarean section and planned for labor induction. Participants were randomly allocated into two groups. Group A (n = 100) received dinoprostone 1.5 mg vaginal tablet. Group B (n = 100) received 10 mg dinoprostone sustained release vaginal pessary. Primary outcome was vaginal delivery rate. Secondary outcomes included maternal and neonatal outcomes. Results: The dinoprostone vaginal tablet and dinoprostone vaginal pessary had a comparable vaginal delivery rate (67% and 64%, respectively;p = 0.78). The median patient satisfaction with the birth process was superior in the dinoprostone vaginal pessary group (p = 0.04). Maternal and neonatal outcomes were similar in both groups. Conclusion: Both forms of dinoprostone were effective methods for labor induction in women with prior cesarean section. However, the patient satisfaction with the birth process was in favor of the dinoprostone sustained release vaginal pessary.

Prediction of Success Rates of Vaginal Birth after Cesarean Delivery According to the Previous Indication for Cesarean Delivery

Background: Trial of labor after cesarean delivery (TOLAC) has long been accepted as a safe option for women with previous cesarean delivery. Previous efforts have been exerted in trials to predict the success rates of TOLAC according to specific parameters related to previous cesarean section and before TOLAC. We aimed to investigate the different indications of previous cesarean delivery as independent predictors for successful vaginal birth. Methods: A retrospective study was conducted in Armed Forces Hospitals of the Southern Region between December 15, 2019, and July 1, 2020. The included 566 patients with previous cesarean section who were willing to undergo a trial of labor were divided into two groups according to the success of vaginal birth (VBAC). Results: The nonrecurring indications for previous cesarean delivery were higher in the successful group (fetal distress 54.7% vs 41.1%, malpresentation 26% vs 21.4%, multifetal pregnancy 3.8% vs 2.7%). Additionally, the successful VBAC group had a significantly higher percentage of previous successful VBAC (47.7% vs 21.9%) and prior vaginal deliveries (58.5% vs 44.2%) and less coincidence of medical disorders and meconium-stained liquor (18.1% vs 26.3% and 3.2% vs 8.2%, respectively) than the unsuccessful group. Conclusion: During counseling regarding trial of labor after cesarean section, indications for previous cesarean section not related to arrest of labor can predict higher success of VBAC. Moreover, previous successful vaginal delivery or VBAC improves the success rates.

Vaginal Birth after a Cesarean Section at Good Shepherd Mission Hospital at Tshikaji in Democratic Republic of the Congo (DRC)

Background: The success rate of vaginal birth after cesarean section with a single cesarean scar is greater than 50%, the lack of the information about the safety of vaginal birth after cesarean delivery pushes most of obstetricians to increase the num ber of cesarean sections following a previous cesarean section. Guidelines for Vaginal birth after cesarean (VBAC) indicate that TOLAC offers women with no contraindications and one previous transverse low-segment cesarean. The objective of the current study was to study the outcome of trial of labour after caesarean section (TOLAC), the indications for emergency repeat cesarean section and to determine the maternal and fetal prognosis in vaginal birth after caesarian section (VBAC) at Tshikaji Mission Hospital. Patients, Material and Methods: This is a retrospective study of the records of 126 women were selected to undergo the TOLAC in the department of gynecology and obstetrics at the Tshikaji Mission Hospital over the period from January 1st to December 31st, 2021. The data on demography, antenatal care, labour and delivery and outcomes were collected from the maternity unit of this hospital. The data were analyzed using SPSS version 2.0. Results: The TOLAC in 126 studied women. The course of work allowed vaginal delivery 107 parturient women, a success rate of successful VBAC of 85% after the TOLAC. The repeat emergency cesarean section was necessary for delivery in 15% of cases for failed TOLAC. There was no maternal mortality, but we recorded one fetal death or 0.8% of perinatal mortality, 2 cases of cicatricial dehiscence, the incidence of 1.6%. Maternal morbidity after delivery on cicatricial uterus was dominated by postpartum hemorrhages, with 19 cases or 15.1% of cases. Cervical dilatation of more than 3 cm at the time of admission, the parity more than 3 and were the significant factors in favor of a successful VBAC. Birth weight of more than 3500 g, fetal distress and malpresentation were associated with a lower success rate of VBAC. The TOLAC in selected cases has great importance in the present era of the rising rate of primary CS especially in rural areas. Conclusion: Pregnancy on a cicatricial uterus represents a high-risk pregnancy. Trial of VBAC in selected cases has great importance in the present era of the rising rate of primary CS especially in rural areas. There is a significantly high vaginal birth after caesarian section (VBAC) success rate among selected women undergoing trial of scar in Tshikaji Hospital. TOLAC remains the option for childbirth in low resource settings as Kasai region in DRC. Adequate patient education and counselling in addition to appropriate patient selection for TOLAC remain the cornerstone to achieving high VBAC success rate.

Vaginal Cesarean Section, an Alternative to High-Risk Trigger on Scarred Uterus

The objective is to report a clinical case of vaginal cesarean section performed to expel a dead fetus in scarred uterus. For this indication, vaginal hysterectomy constitutes an alternative to vaginal expulsion with a high risk of uterine rupture and to classic abdominal cesarean section with risk of significant surgical trauma, particularly adhesions. However, this surgical technique, described since the 19th century, remains unknown to many practitioners and few publications exist on the subject throughout the world. Considered obsolete by some practitioners, it retains all its advantages in the practice of modern obstetrics. We report this case of expulsion of fetal death on a tri-scarred uterus performed by vaginal cesarean section at the Health District Reference Health Center (District Hospital) of Commune I in Bamako, Mali in a 37-year-old patient with a pregnancy of 27 weeks of amenorrhea.

改良VBAC评分法在剖宫产后阴道试产中的应用

目的探讨改良VBAC评分法在剖宫产后阴道试产中的应用价值。方法选择2014年1月至2019年10月沧州市中心医院产科住院的519例瘢痕子宫再妊娠有阴道分娩要求的孕妇作为研究对象。参考国外的评分方法,即Flamm、Gonen、Grobman、Metz的评分法,进行改良,建立新的评分法,选择与阴道分娩结局相关的各个因素,分为临产前评分及临产后评分两项,利用ROC曲线得到最佳截断值,分析改良的VBAC评分法与试产结局的关系。结果改良的VBAC评分法与Flamm、Metz法比较,ROC曲线下面积(0.979)明显大于Metz法(0.711)、Flamm法(0.623),三者相比,差异具有统计学意义(P<0.05),改良的VBAC评分法得到的最佳截断值为16,大于截断值与小于截断值的阴道分娩率相比,差异有统计学意义(P<0.05);对比分析分值大于截断值的阴道分娩组与非瘢痕子宫阴道分娩组的妊娠结局,肩难产、产后出血、产褥病率、子宫切除、新生儿窒息、产后住院天数比较,差异无统计学意义(P>0.05)。会阴侧切、阴道助产例数较对照组增高,差异具有统计学意义(P<0.05)。结论改良VBAC评分法与其它预测方法比较,能较好的预测剖宫产后阴道分娩的成功率,有一定的临床应用价值。

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

Background：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.Methods：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.Results：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%; χ2 = 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%, χ2 = 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.Conclusions：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.

VBAC试产结局的相关因素分析

目的探讨分析剖宫产后再阴道分娩(VBAC)试产结局的影响因素。方法回顾性分析深圳市罗湖区妇幼保健院妇产科2017年1月-2018年1月收拾的120例VBAC试产孕妇的临床资料,采用多因素logistic回归分析VBAC试产结局的影响因素。结果依据VBAC试产是否成功分为试产成功组和试产失败组,VBAC试产成功率为60.00%;两组在年龄、距离上次剖宫产时间、是否具有阴道分娩史及宫口扩张程度等方面比较具有显著差异(P<0.05);logistic回归分析显示,年龄、距离上次剖宫产时间、阴道分娩史及宫口扩张均是VBAC试产结局的影响因素。结论年龄、距离上次剖宫产时间、阴道分娩史及宫口扩张程度均是VBAC试产结局的重要影响因素,应做好产前检查,提高VBAC试产成功率,改善母婴结局。

剖宫产后阴道试产在无阴道分娩史妇女早产中的应用

目的探讨剖宫产后阴道试产(TOLAC)在无阴道分娩史的妇女早产中的应用。方法回顾性纳入2018年1月至2022年6月在本院接受TOLAC的无阴道分娩史且因早产住院的116名孕妇。根据TOLAC是否成功将研究对象分为TOLAC成功组(n=89)和TOLAC失败组(n=27)。采用最小绝对收缩和选择算子(LASSO)回归筛选TOLAC成功率相关变量,并构建TOLAC成功率预测模型,采用一致性指数(C-index)对预测模型进行内部验证。结果TOLAC成功组及TOLAC失败组的入院时宫颈扩张、入院时宫颈消失、破膜时间比较差异均有统计学意义(t=3.382、3.377、2.027,P<0.05),两组间的入院时硬膜外镇痛、Bishop评分<4、引产、胎膜早破、催产素给药比例比较差异均有统计学意义(χ^(2)值分别为3.517、8.024、14.111、6.570、4.038,P<0.05)。共纳入9个变量(入院时宫颈扩张、入院时宫颈消失、硬膜外镇痛、Bishop评分<4、引产、胎膜早破、破膜时间、催产素给药、分娩时宫颈扩张)用于LASSO回归筛选TOLAC成功率预测变量。应用列线图显示TOLAC成功率模型的预测因子:入院时宫颈扩张(OR=1.11,95%CI:1.04~1.19,P=0.003),引产(OR=0.89,95%CI:0.79~1.00,P=0.049),催产素给药(OR=0.71,95%CI:0.58~0.88,P=0.002),胎膜早破(OR=3.27,95%CI:2.49~4.45,P<0.001),Bishop评分<4(OR=0.33,95%CI:0.17~0.62,P=0.001)和硬膜外麻醉(OR=2.92,95%CI:1.42~6.48,P=0.005)。内部验证的结果显示以C指数衡量的TOLAC成功率的预测准确性为0.89。结论该模型对无阴道分娩史的早产妇女是否可行剖宫产后阴道试产的评估,有一定指导意义。

麦角新碱联合卡孕栓对剖宫产术后再次妊娠阴道分娩产妇产后出血的影响

目的探究麦角新碱联合卡孕栓对剖宫产术后再次妊娠阴道分娩(VBAC)产妇产后出血的影响。方法回顾性选取100例于2019年3月至2021年2月在首都医科大学附属北京妇产医院进行VBAC的产妇作为研究对象,根据产妇分娩后接受预防产后出血用药方案的差异分为观察组(n=50)和对照组(n=50)。对照组使用缩宫素联合卡孕栓治疗,观察组在对照组基础上加用麦角新碱治疗。比较两组产妇出血及止血情况、实验室检查结果、临床表现和安全性。结果对照组产妇的产后2 h及产后24 h出血量均大于观察组,对照组产妇的止血时间也长于观察组(P<0.05);治疗后,两组产妇的活化部分凝血活酶时间(APTT)、凝血酶凝固时间(TT)、血红蛋白(Hb)和纤维蛋白原(FIB)均有所降低,且对照组产妇的APTT、TT、FIB均高于观察组,Hb低于观察组(P<0.05);观察组产妇的宫缩持续时间较对照组更长,恶露持续时间和住院时间较对照组显著更短(P<0.05);观察组和对照组产妇的总不良反应发生率分别为14.00%和18.00%,差异无统计学意义(P>0.05)。结论麦角新碱联合卡孕栓能有效改善VBAC产妇产后出血的情况。

气囊仿生助产联合硬膜外麻醉分娩镇痛对剖宫产后阴道分娩女性盆底功能的影响

目的探讨气囊仿生助产联合硬膜外麻醉分娩镇痛对剖宫产后阴道分娩(vaginal birth after cesarean section,VBAC)女性盆底功能的影响。方法选取2020年1月至2021年12月南宁市妇幼保健院剖宫产后再次妊娠并成功阴道分娩的经产妇120例为研究对象,根据随机数字表法将其分为观察组和对照组,每组各60例。观察组产妇在分娩过程中采用气囊仿生助产联合硬膜外麻醉分娩镇痛,对照组产妇单纯采用硬膜外麻醉分娩镇痛。比较两组产妇的疼痛视觉模拟评分法(visual analogue scale,VAS)评分、会阴裂伤情况、总产程、产后出血量、新生儿窒息率及产妇产后6~8周尿失禁发生率、阴道或子宫脱垂发生率、盆底肌肌力及功能状态。结果观察组产妇的总产程显著短于对照组,产后出血量显著少于对照组,尿失禁发生率显著低于对照组(P<0.05)。观察组产妇的盆底肌肌力、盆底肌疲劳度、盆底动态压力均显著优于对照组(P<0.05)。两组产妇的会阴裂伤或侧切、阴道和子宫脱垂发生率比较差异均无统计学意义(P>0.05)。结论剖宫产后阴道试产时采用气囊仿生助产联合硬膜外麻醉镇痛可缩短产程,减少产后出血,改善产后盆底功能状况。

前次剖宫产手术时机对再孕阴道分娩母婴并发症的影响

目的探讨前次剖宫产手术时机对再孕阴道分娩母婴并发症的影响。方法回顾性分析本院收治的1034例足月剖宫产术后阴道分娩(VBAC)孕产妇资料。按前次剖宫产手术时机分为择期组(择期行剖宫产术)426例、第一产程组(第一产程行剖宫产术)278例、第二产程组(第二产程行剖宫产术)330例。分析前次剖宫产手术时机对VBAC孕产妇的产程、产后并发症及新生儿出生情况的影响。结果第二产程组子宫收缩乏力比例、产后24 h出血量、产后出血发生率及产后住院天数均大于择期组和第一产程组(P<0.05),而择期组与第一产程组比较,以上指标差异无统计学意义(P>0.05)。3组间第二、第三产程时限、助产率、会阴裂伤率、产后尿潴留率、发热比例及新生儿1 min Apgar评分、新生儿窒息发生率及转入新生儿科比例比较,差异无统计学意义(P>0.05)。结论前次第二产程剖宫产手术孕产妇再孕阴道分娩时发生子宫收缩乏力及产后出血风险增加。

低浓度罗哌卡因复合小剂量舒芬太尼椎管内分娩镇痛在剖宫产术后再次妊娠阴道分娩中的应用

目的:探讨低浓度罗哌卡因复合小剂量舒芬太尼椎管内分娩镇痛用于剖宫产术后再次妊娠阴道分娩(VBAC)的可行性。方法:回顾分析2012年1月至2013年12月于我院建卡的剖宫产术后再次妊娠要求阴道试产的单胎、足月病例83例,按是否接受椎管内分娩镇痛将研究对象分为镇痛组(37例)和非镇痛组(46例)。比较两组的产程时间、催产素使用情况、分娩方式、产后出血量、新生儿体重及新生儿Apgar评分。结果:两组产妇的年龄、体重指数、孕周比较,差异均无统计学意义。镇痛组的催产素使用率为62.2%,显著高于非镇痛组(21.7%)(P<0.01)。镇痛组镇痛后的VAS评分显著低于镇痛前[(9.43±0.50)分vs(3.16±0.69)分,P<0.01]。两组的产程时间、产后出血量、新生儿体重、Apgar评分比较,差异无统计学意义(P>0.05)。两组均无子宫破裂等严重并发症发生。结论:低浓度罗哌卡因复合小剂量舒芬太尼应用于VBAC安全有效,值得推广。

剖宫术后再次妊娠阴道试产成功因素的分析

目的 通过 6 2例剖宫术后再次妊娠的孕妇进行阴道试产 ,分析影响其成功的因素。方法 了解6 2例孕妇前次剖宫产的指征及妊娠间隔时间、手术方式 ,用B超检查胎儿双顶径、胎位、子宫疤痕愈合情况 ,严密观察产程进展 ,必要时加用催产素。结果 5 0例成功地阴道分娩 ,成功率为 80 .6 5 % ,产后常规宫腔探查 ,无子宫疤痕破裂 ,无孕产妇死亡 ,新生儿Apgar评分均为 10分。 结论 剖宫术后阴道分娩是可行的 ,并有助于降低剖宫产率。

中国部分医疗保健机构剖宫产术使用状况调查

目的:描述2002年中国医疗保健机构剖宫产术的使用情况。方法:对中国31个省/自治区/直辖市中部分医疗保健机构进行问卷调查,对调查结果进行描述性分析。结果:①在被调查的887家医疗保健机构中有70.1%开展了剖宫产,在普通乡卫生院开展率也达到了41.0%;②被调查的医疗保健机构中产妇接受剖宫产的比例平均达到38.0%;③被调查的医疗保健机构的剖宫产费用是阴道产的2～4倍。结论:目前剖宫产在我国得到广泛开展,但是在其使用中还存在很多问题,需要引起各方重视。

剖宫产术后经阴道分娩的7种预测模型在中国的临床应用

目的:初步探讨国外文献报道的7种预测模型在国内临床中对剖宫产术后经阴道分娩(vaginal birth after cesarean,VBAC)的预测价值。方法:收集2007年1月1日至2014年11月31日共53例剖宫产术后再次妊娠阴道试产(trial of labor after cesarean,TOLAC)产妇的相关资料及其临床结局,采用Troyer、Weinstein、Flamm、Gonen、Smith、Grobman、Torri所建立的预测模型对每例患者进行评分,t检验比较应用每种模型预测VBAC失败组与成功组的分值。对成功组及失败组的评分进行分层,采用秩和检验比较每种评分对于成功率预测的相关性;应用受试者工作特征(receiver operating characteristic,ROC)曲线及曲线下面积(area under curve,AUC)评价预测模型的分辨力。结果:53例产妇中,VBAC成功者44例,失败者9例,成功率83.0%。成功组及失败组的分值在Weinstein及Grobman预测模型中差异有统计学意义,在其他各预测模型无明显差异。评分经分层后,VBAC的成功率在各层与原文献中各模型的预测相符,各层间的成功率差异仅在Weinstein预测模型中存在统计学差异。Weinstein预测模型的ROC曲线AUC最大(0.746),但各预测模型间无显著差异。结论:7种预测模型中,Weinstein对本研究人群VBAC成功率的预测优于其他6个模型,但仍需建立符合我国具体情况的VBAC预测模型。

椎管内分娩镇痛在剖宫产术后再次妊娠阴道分娩中的应用

目的探讨椎管内分娩镇痛用于剖宫产术后再次妊娠阴道分娩(vaginal birth after cesarean section,VBAC)的可行性和安全性。方法回顾性分析2016年1月~2017年3月于我院阴道分娩的剖宫产术后再次妊娠的单胎足月孕妇资料,其中接受椎管内分娩镇痛25例(镇痛组),43例未接受(非镇痛组)。2组产妇年龄、体重指数、分娩孕周、新生儿体重差异均无统计学意义(P>0.05)。比较2组产程时间、产后出血率、产后尿潴留率及新生儿窒息率。结果镇痛组镇痛后半小时的疼痛视觉模拟评分(2.2±1.0)分,显著低于镇痛前的(8.6±1.0)分(配对t检验,t=22.09,P=0.00)。2组第一产程时间、第二产程时间、产钳率、新生儿窒息率、产后出血率差异无统计学意义(P>0.05)。2组均无子宫破裂等严重并发症发生。结论椎管内麻醉应用于VBAC安全有效,在有条件的医院可推广应用。

助产士连续性服务模式在瘢痕子宫孕妇阴道分娩中的应用

目的探讨助产士连续性服务模式在瘢痕子宫孕妇阴道分娩中的应用效果。方法便利抽样法选择2016年4月至2017年3月在上海交通大学医学院附属国际和平妇幼保健院就诊的有阴道分娩意愿、符合剖宫产术后再次妊娠阴道试产(trial of labor after cesarean section,TOLAC)条件且自愿参加助产士咨询门诊的孕妇635例为研究对象,对其实施助产士连续性服务模式,对该模式开展前后瘢痕子宫孕妇剖宫产术后再次妊娠阴道分娩(vaginal birth after cesarean,VBAC)的情况及母婴结局进行比较。结果开展助产士连续性服务模式后,635例孕妇中,最终VBAC 130例,与开展前(2013-2015年)比较,剖宫产率、VBAC产妇的会阴侧切率及新生儿窒息发生率均有所降低,差异均有统计学意义(均P<0.05)。结论助产士连续性服务模式的应用,有利于提高瘢痕子宫孕妇TOLAC的成功率,保障母婴安全。