Trial of labor after 2 previous cesareans: a multicenter study

BACKGROUND

Trial of labor after cesarean after 2 cesarean deliveries is linked to a lower success rate of vaginal delivery and higher rates of adverse obstetrical outcomes than trial of labor after cesarean after 1 previous cesarean delivery.

OBJECTIVE

This study aimed to investigate the factors associated with failed trial of labor after cesarean among women with 2 previous cesarean deliveries.

STUDY DESIGN

This was a multicenter retrospective cohort study, which included all women with singleton pregnancies attempting trial of labor after cesarean after 2 previous cesarean deliveries between 2003 and 2021. This study compared labor, maternal, and neonatal characteristics between women with failed trial of labor after cesarean and those with successful trial of labor after cesarean. Univariate analysis was initially performed, followed by multivariable analysis (adjusted odds ratios with 95% confidence intervals).

RESULTS

The study included a total of 1181 women attempting trial of labor after cesarean after 2 previous cesarean deliveries. Among these cases, vaginal birth after cesarean was achieved in 973 women (82.4%). Women with failed trial of labor after cesarean had higher rates of maternal and neonatal morbidities. Several factors were found to be associated with failed trial of labor after cesarean, including longer interpregnancy and interdelivery intervals, lower gravidity and parity, lower rates of previous successful vaginal delivery, smoking, earlier gestational age at delivery (38.3±2.1 vs 39.5±1.3 weeks), late preterm delivery (34-37 weeks of gestation), lower cervical dilation on admission, no use of epidural, and smaller neonatal birthweight. Our multivariable model revealed that late preterm delivery (adjusted odds ratio, 3.79; 95% confidence interval, 1.37-10.47) and cervical dilation on admission for labor <3 cm (adjusted odds ratio, 2.58; 95% confidence interval, 1.47-4.54) were associated with higher odds of failed trial of labor after cesarean.

CONCLUSION

In the investigated population of women with 2 previous cesarean deliveries undergoing trial of labor after cesarean, admission at the late preterm period with a cervical dilation of <3 cm, which reflects the latent phase, may elevate the risk of failed trial of labor after cesarean and a repeated intrapartum cesarean delivery.

Prediction of Intraperitoneal Adhesions in Repeated Cesarean Deliveries with Stria Gravidarum Scoring System: A Cross-sectional Study

BACKGROUND

The preoperative prediction of intraperitoneal adhesion (IPA) before repeated cesarean deliveries (CD), which are becoming more prevalent, is crucial for maternal health.

AIM

The aim of the study was to preoperatively predict IPA in repeated CD with the stria gravidarum (SG) scoring system.

METHODS

A total of 167 patients with at least one previous CD at or beyond 37 weeks of gestation were analyzed. Preoperative SG was calculated according to the Davey scoring system: 0-2 score were defined as mild SG (Group 1; n: 94, 56.2%), and 3-8 score were defined as severe SG (Group 2; n = 73, 43.8%). Preoperative previous cesarean incision features were evaluated according to the Vancouver scar scale. IPA was evaluated according to the Nair's and modified Nair's scoring systems.

RESULTS

Parity, younger age at first pregnancy, higher body mass index, number of previous CDs, rate of scar symptoms, Nair's and the modified Nair's scores were statistically significant in Group 2 (P = 0.01; P = 0.04; P = 0.007; P = 0.004; P < 0.001; P = 0.007; P = 0.02, respectively). Davey score ≥3 and Vancouver score ≥4.5 were determined as the cut-off value to predict IPA (P = 0.1 and 0.07, respectively). According to multivariate analysis, both Davey and Vancouver scores are independent factors in predicting IPA (P = 0.02 and 0.04, respectively).

CONCLUSION

Evaluating the SG score through the Davey score in women with a history of previous CD may assist in predicting IPA status before the planning of a subsequent surgery.

Safety and feasibility of trial of vaginal labor after cesarean section: A retrospective study

By observing and analyzing the success rate of Tai'an City central hospital TOLAC and VBNC and various indicators after delivery, we make sure whether TOLAC is safe and feasible to be promoted in Tai'an area.Between January and December 2017, data of 144 cases undergoing TOLAC, 152 cases undergoing VBNC, 152 cases undergoing RCS and 142 case undergoing PCS in Tai'an City Central Hospital were retrospectively analyzed. The success rate of vaginal delivery, labor time, 24 hours postpartum hemorrhage, hospital stay, Apgar score of newborns and puerperal morbidity were observed.Primary study outcomes: The success rates of the TOLAC and VBNC groups were 93.06% and 93.42%, respectively, where the difference was not statistically significant (P = .901). Secondary study outcomes: There were no significant differences in labor time (P = .0249), amount of 24 hours postpartum hemorrhage (P = .206), Apgar score of newborns (P = .582), hospital stay (P = .194) and puerperal morbidity (P = .942) between the VBAC group and VBNC group. There were statistically significant differences in amount of 24 hours postpartum hemorrhage (P < .001), hospital stay (P < .001) and puerperal morbidity (P = .018), but no difference in Apgar score of newborns (P = .228) between the VBAC group and RCS group. There were significant differences in operation time (P = .011), amount of 24 hours hemorrhage (P = .001), hospital stay (P = .001) and puerperal morbidity (P = .041), but no significant difference in Apgar score of newborns (P = .300) between the RCS and PCS groups.The TOLAC is as safe and feasible as VBNC, and more favorable to the safety of mother and fetus than RCS in Tai'an area.

Outcome of multiple cesarean sections in a tertiary maternity hospital in the United Arab Emirates: A retrospective analysis

TITLE

Outcome of multiple cesarean sections in a tertiary maternity hospital in the United Arab Emirates.

OBJECTIVE

To describe the operative outcomes, clinical findings, maternal morbidity and neonatal outcome associated with increasing numbers of cesarean deliveries.

DESIGN

Retrospective study.

SETTING

Corniche Hospital, Abu Dhabi, United Arab Emirates.

POPULATION

The study cohort was 1008 women giving birth by cesarean section who had previously undergone one or more cesarean sections, who had a singleton pregnancy, and who were not in labor.

METHODS

A retrospective study was undertaken over the one-year period from January 2016 to December 2016. Women were divided into five groups according to number of previous cesarean sections. The first group comprised of women who had one previous cesarean section, the second group women who had two previous cesarean sections, the third group consequently three previous cesarean sections and the fourth group four previous cesarean sections, whereas in the fifth group women had previously five or more previous cesarean sections. The maternal and neonatal outcomes of the groups were retrospectively evaluated.

RESULTS

The risks of placenta previa, placenta accreta, uterine dehiscence or rupture, postpartum hemorrhage, blood transfusion, bladder injury, lengths of operative time and hospital stay, and number of admissions to the high dependency unit increased with increasing numbers of previous cesarean sections. Women with five or more previous cesarean sections had a 10-fold increased risk of placenta previa (odds ratio [OR], 9.8; 95 % confidence interval [CI], 3.3-28.6), a 27 - fold increased risk of placenta accreta (OR, 26.5; 95 % CI, 4.2-166.3), and an 11-fold increased risk of uterine dehiscence or rupture (OR, 11.3; 95 % CI, 1.8-70.8).

DISCUSSION

The results of our study indicate that serious maternal morbidity increases with increasing numbers of previous cesarean sections. Women planning large families should consider the risks of repeat cesarean sections when contemplating elective primary cesarean delivery or attempted vaginal birth after one previous cesarean section.

Women's Preferences Regarding the Processes and Outcomes of Trial of Labor After Cesarean and Elective Repeat Cesarean Delivery

Background: The decrease in trial of labor after cesarean (TOLAC) at institutions that offer this option suggests that patient preference could be a factor in the declining TOLAC rate. However, data regarding how women value the potential processes and outcomes of TOLAC and elective repeat cesarean delivery (ERCD) are limited. We sought to determine how women view the processes and outcomes of TOLAC and ERCD and identify sociodemographic and clinical factors associated with these preferences. Materials and Methods: This is a multicenter cross-sectional study of mode of delivery preferences among TOLAC-eligible women at 26-34 weeks gestation. The time tradeoff metric was used to obtain utilities for the processes and outcomes of TOLAC and ERCD. Multivariable regression analysis was utilized to identify independent predictors of utilities. Results: The 299 study participants constituted a geographically and racially/ethnically diverse group. Although uncomplicated TOLAC resulting in vaginal birth after cesarean and uncomplicated ERCD resulted in high utility values, any alteration in either the process or outcome resulted in substantial utility decrements. In multivariable regression analysis, race/ethnicity, insurance status, and order of scenario presentation emerged as statistically significant predictors. Conclusions: Information regarding both maternal and infant implications is important to women in discussions about approach to delivery. Both the way in which information regarding labor interventions and potential complications is presented and the characteristics of the women contemplating this information affect its impact. These findings underscore the need for evidence-based decision support to help create realistic expectations and incorporate informed patient preferences into decision-making to optimize both clinical outcomes and individual patient experience for women with a prior cesarean delivery.

Prevalence of Cesarean Section and Its Indications in A Tertiary Care Hospital

Introduction: Cesarean section is a surgical procedure performed to deliver fetus through abdominal route. Increasing rate of cesarean section worldwide is an alarming concern for public health and obstetricians due to increase in financial burden and risk to health of the mother in comparison to vaginal delivery. The aim of the study was to find the prevalence of cesarean section and its most common indication in a tertiary care hospital. Methods: This descriptive cross-sectional study was done in a tertiary care hospital, from July 2016 to June 2018 after taking ethical clearance from institutional review board. Convenience sampling was done to reach the sample size. Data was collected and entry was done in microsoft excel, point estimate at 95% CI was calculated along with frequency and proportion for binary data and analysis was done. Results: Out of total deliveries conducted, 862 (36.8%) were CS deliveries, 1477 (63.1%) were vaginal deliveries, and 12 (0.51%) were instrumental deliveries. Prevalence of CS is 862 (36.8%) at 95% CI (34.82%-38.78%). Mean age±S.D of delivering mother was found to be 26.1±0.25 years. Primi cesarean section was more than repeat cesarean section. Most common indication of cesarean section was fetal distress 243 (28%) followed by previous cesarean section 165 (18%), non-progress of labour 106 (12%), oligohydramnios 59 (7%), malpresentation 59 (7%), cephalo pelvic disorders 52 (6.5%), and hypertensive disorder in pregnancy 33 (4%). Conclusions: Prevalence of cesarean section in a tertiary care hospital is high compared to WHO data. The most common indication of cesarean section are fetal distress and previous cesarean section.

Prevalence and Indications of Cesarean Section in a Community Hospital of Western Region of Nepal

  Introduction: Cesarean section is one of the common obstetric procedures done when the childbirth is not anticipated to occur by the normal vaginal delivery. There has been increased rate of cesarean section globally as well as in our country in recent decades. Methods: This descriptive cross-sectional study has been carried out by reviewing a year of data from maternity ward of Paschimanchal Community Hospital, Prithvi Chowk, Pokhara. The total number of delivery, their modes either vaginal or cesarean, indications for the cesarean section and their outcomes were analyzed. The obtained data was entered and analyzed in Microsoft Excel. Results: Total of 257 cases underwent delivery during the study period and 174 (63.27%) were by cesarean section. Oligohydramnios is the most common indication for cesarean section. Around 25 (14.36%) of the women underwent repeat cesarean section. Conclusions: The rate of cesarean section was quite high in our study and further studies are recommended for understanding of causes and other associated factors with it.

In which groups of pregnant women can the caesarean delivery rate likely be reduced safely in the USA? A multicentre cross-sectional study

OBJECTIVES

To identify obstetrical subgroups in which (1) the caesarean delivery (CD) rate may be reduced without compromising safety and (2) CD may be associated with better perinatal outcomes.

DESIGN

A multicentre cross-sectional study.

SETTING

19 hospitals in the USA that participated in the Consortium on Safe Labor.

PARTICIPANTS

228 562 pregnant women in 2002-2008.

MAIN OUTCOME MEASURES

Maternal and neonatal safety was measured using the individual Weighted Adverse Outcome Score.

METHODS

Women were divided into 10 subgroups according to a modified Robson classification system. Generalised estimated equation model was used to examine the relationships between mode of delivery and Weighted Adverse Outcome Score in each subgroup.

RESULTS

The overall caesarean rate was 31.2%. Repeat CD contributed 29.5% of all CD, followed by nulliparas with labour induction (15.3%) and non-cephalic presentation (14.3%). The caesarean rates in induced nulliparas with a term singleton cephalic pregnancy and women with previous CD were 31.6% and 82.0%, respectively. CD had no clinically meaningful association with perinatal outcomes in most subgroups. However, in singleton preterm breech presentation and preterm twin gestation with the first twin in non-cephalic presentation, CD was associated with substantially improved maternal and perinatal outcomes.

CONCLUSIONS

Women with repeat CD, term non-cephalic presentation, term twins or other multiple gestation and preterm births may be the potential targets for safely reducing prelabour CD rate, while nulliparas or multiparas with spontaneous or induced labour, women with repeat CD, term non-cephalic presentation, term twins or other multiple gestation and preterm births are potential targets for reducing intrapartum CD rate without compromising maternal and neonatal safety in the USA. On the other hand, CD may still be associated with better perinatal outcomes in women with singleton preterm breech presentation or preterm twins with the first twin in non-cephalic presentation.

Changing Patterns and Factors Associated With Mode of Delivery Among Pregnant Women With Human Immunodeficiency Virus Infection in the United States

OBJECTIVE

To describe patterns and factors associated with mode of delivery among pregnant women with human immunodeficiency virus (HIV) infection in the United States in relation to evolving HIV-in-pregnancy guidelines.

METHODS

We conducted an analysis of two observational studies, Pediatric AIDS Clinical Trials Group and International Maternal Pediatric Adolescent AIDS Clinical Trials Network Protocol P1025, which enrolled pregnant women with HIV infection from 1998 to 2013 at more than 60 U.S. acquired immunodeficiency syndrome clinical research sites. Multivariable analyses of factors associated with an HIV-indicated cesarean delivery (ie, for prevention of mother-to-child transmission) compared with other indications were conducted and compared according to prespecified time periods of evolving HIV-in-pregnancy guidelines: 1998-1999, 2000-2008, and 2009-2013.

RESULTS

Among 6,444 pregnant women with HIV infection, 21% delivered in 1998-1999, 58% in 2000-2008, and 21% in 2009-2013; 3,025 (47%) delivered by cesarean. Cesarean delivery increased from 30% in 1998 to 48% in 2013. Of all cesarean deliveries, repeat cesarean deliveries increased from 16% in 1998 to 42% in 2013; HIV-indicated cesarean deliveries peaked at 48% in 2004 and then dropped to 12% by 2013. In multivariable analyses, an HIV diagnosis during pregnancy, initiation of antiretroviral therapy in the third trimester, a plasma viral load 500 copies/mL or greater, and delivery between 37 and 40 weeks of gestation increased the likelihood of an HIV-indicated cesarean delivery. In analyses by time period, an HIV diagnosis during pregnancy, initiation of antiretroviral therapy in the third trimester, and a plasma viral load of 500 copies/mL or greater were progressively more likely to be associated with an HIV-indicated cesarean delivery over time.

CONCLUSION

Almost 50% of pregnant women with HIV infection underwent cesarean delivery. Over time, the rate of repeat cesarean deliveries increased, whereas the rate of HIV-indicated cesarean deliveries decreased; cesarean deliveries were more likely to be performed in women at high risk of mother-to-child transmission. These findings reinforce the need for both early diagnosis and treatment of HIV infection in pregnancy and the option of vaginal delivery after cesarean among pregnant women with HIV infection.

Factors Associated with Trial of Labour and Mode of Delivery in Robson Group 5: A Select Group of Women With Previous Caesarean Section

OBJECTIVE

To determine the proportion of women in Robson group 5 (RG5) who were eligible for a trial of labour after Caesarean (TOLAC) and, among eligible candidates, identify determinants of having a TOLAC and subsequent vaginal delivery (VD).

METHODS

This population-based cohort study used data derived from the Nova Scotia Atlee Perinatal Database. Deliveries from 1998-2014 to women in RG5 (≥1 previous CS with a singleton term cephalic fetus) were included. Eligibility for a TOLAC was based on SOGC criteria. Multivariable logistic regression was used to identify characteristics independently associated with TOLAC and VD. The characteristics associated with VD were used in a logistic model to predict the theoretical probability of VD in women who did not have a TOLAC.

RESULTS

Of the 15 111 deliveries in RG5, 75.3% were by CS. Of the 14 763 eligible women, 5488 (37.2%) had a TOLAC, of which 3739 (68.1%) resulted in VD. Predictors of VD included high area-level income and either a CS without labour or a spontaneous VD in the preceding pregnancy. While mode of previous delivery also predicted TOLAC among eligible women, high area-level income was associated with reduced odds of TOLAC. The probability of VD in women who did not undergo TOLAC was estimated to be 47.1%, and the lowest CS rate attainable in RG5 was estimated at 46.3%.

CONCLUSIONS

Sociodemographic factors such as income and previous mode of delivery were associated with the rates of TOLAC and subsequent VD in eligible women, and suggest that the Caesarean section rate in RG5 could be safely reduced.

A Comparative Study of the Spontaneous Labor Rate in Scheduled Elective Cesarean Section at 38 Weeks versus 39 Weeks of Gestation in Parturient with Previous Cesarean Section

OBJECTIVE

To assess the effect of the different scheduled gestational age for a repeat elective cesarean section (CS) on emergency cesarean section rate and adverse pregnancy outcomes in pregnant women with history of previous CS.

MATERIAL AND METHOD

A prospective cohort study of singleton pregnant women who had a history of CS and were scheduled for a repeat elective CS to be performed. The cases were divided into two groups of which the elective CS was appointed at 38 or 39 weeks of gestation as study and control groups, respectively. Emergency cesarean section rate, maternal and neonatal complications were defined as main outcomes.

RESULTS

Of 415 scheduled elective repeat cesarean deliveries performed at 38 weeks of gestation or later, 209 were scheduled between 38 0/7 and 38 6/7 weeks (study group), and 206 were scheduled between 39 0/7 and 39 6/7 weeks (control group). Most of the cases had one previous cesarean delivery. The emergency CS rate before schedule in the study group was significantly less than in the control group (15.3% vs. 51%, p<0.001). Spontaneous labor pain was a major factor to have unplanned delivery. The maternal intra-operative complications were significantly increased in women who had emergency cesarean before schedule compared to elective CS on scheduled in 38 weeks group (25% vs. 12.9%, p<0.001) and 39 weeks group (31.4% vs. 14%, p<0.001). The major intra-operative complication was uterine atony. There were no statistically significant differences in maternal post-operative and neonatal complications in scheduled elective CS in 38 and 39-week group. Transient tachypnea of the newborn (TTNB) was higher in elective CS at 38 week compared to emergency CS.

CONCLUSION

The emergency CS rate in 39 weeks gestation group was significantly higher than 38 weeks group. The incidence of adverse maternal intra-operative complications was statistically difference with emergency CS when compared to elective CS in case and control groups. Recommendation of elective repeated CS at GA39 weeks may be suitable only under some circumstances. The number of prior CS is one of factors that should be considered.

Vaginal birth after caesarean section: why is uptake so low? Insights from a meta-ethnographic synthesis of women's accounts of their birth choices

OBJECTIVE

To identify what women report influences their preferred mode of birth after caesarean section.

DESIGN

Systematic review of qualitative literature using meta-ethnography.

DATA SOURCES

Medline, EMBASE, ASSIA, CINAHL and PsycINFO (1996 until April 2013; updated September 2015). Hand-searched journals, reference lists and abstract authors.

STUDY SELECTION

Primary qualitative studies reporting women's accounts of what influenced their preferred mode of birth after caesarean section.

DATA EXTRACTION AND SYNTHESIS

Primary data (quotations from study participants) and authors' interpretations of these were extracted, compared and contrasted between studies, and grouped into themes to support the development of a 'line of argument' synthesis.

RESULTS

20 papers reporting the views of 507 women from four countries were included. Distinctive clusters of influences were identified for each of three groups of women. Women who confidently sought vaginal birth after a caesarean section were typically driven by a long-standing anticipation of vaginal birth. Women who sought a repeat caesarean section were strongly influenced by distressing previous birth experiences, and at times, by encouragement from social contacts. Women who were more open to information and professional guidance had fewer strong preconceptions and concerns, and viewed a range of considerations as potentially important.

CONCLUSIONS

Women's attitudes towards birth after caesarean section appear to be shaped by distinct clusters of influences, suggesting that opportunities exist for clinicians to stratify and personalise decision support by addressing relevant ideas, concerns and experiences from the first caesarean section birth onwards.

Effect of stage of initial labor dystocia on vaginal birth after cesarean success

OBJECTIVE

The objective of the study was to examine whether the stage of labor dystocia causing a primary cesarean delivery (CD) affects a trial of labor after cesarean (TOLAC) success.

STUDY DESIGN

This was a retrospective cohort study of women who had primary CD of singleton pregnancies for first- or second-stage labor dystocia and attempted TOLAC at a single hospital between 2002 and 2014. We compared TOLAC success rates between women whose primary CD was for first- vs second-stage labor dystocia and investigated whether the effect of prior dystocia stage on TOLAC success was modified by previous vaginal delivery (VD).

RESULTS

A total of 238 women were included; nearly half (49%) achieved vaginal birth after cesarean (VBAC). Women with a history of second-stage labor dystocia were more likely to have VBAC compared with those with first-stage dystocia, although this trend was not statistically significant among the general population (55% vs 45%, adjusted odds ratio, 1.4, 95% confidence interval, 0.8-2.5]). However, among women without a prior VD, those with a history of second-stage dystocia did have statistically higher odds of achieving VBAC than those with prior first-stage dystocia (54% vs 38%, adjusted odds ratio, 1.8 [95% confidence interval, 1.0-3.3], P for interaction = .043).

CONCLUSION

Nearly half of women with a history of primary CD for labor dystocia will achieve VBAC. Women with a history of second-stage labor dystocia have a slightly higher VBAC rate, seen to a statistically significant degree in those without a history of prior VD. TOLAC should be offered to all eligible women and should not be discouraged in women with a prior second-stage arrest.

Caesarean delivery and its correlates in Northern Region of Bangladesh: application of logistic regression and cox proportional hazard model

BACKGROUND

Caesarean delivery (C-section) rates have been increasing dramatically in the past decades around the world. This increase has been attributed to multiple factors such as maternal, socio-demographic and institutional factors and is a burning issue of global aspect like in many developed and developing countries. Therefore, this study examines the relationship between mode of delivery and time to event with provider characteristics (i.e., covariates) respectively.

METHODS

The study is based on a total of 1142 delivery cases from four private and four public hospitals maternity wards. Logistic regression and Cox proportional hazard models were the statistical tools of the present study.

RESULTS

The logistic regression of multivariate analysis indicated that the risk of having a previous C-section, prolonged labour, higher educational level, mother age 25 years and above, lower order of birth, length of baby more than 45 cm and irregular intake of balanced diet were significantly predict for C-section. With regard to survival time, using the Cox model, fetal distress, previous C-section, mother's age, age at marriage and order of birth were also the most independent risk factors for C-section. By the forward stepwise selection, the study reveals that the most common factors were previous C-section, mother's age and order of birth in both analysis. As shown in the above results, the study suggests that these factors may influence the health-seeking behaviour of women.

CONCLUSIONS

Findings suggest that program and policies need to address the increase rate of caesarean delivery in Northern region of Bangladesh. Also, for determinant of risk factors, the result of Akaike Information Criterion (AIC) indicated that logistic model is an efficient model.

Interinstitutional variations in mode of birth after a previous caesarean section: a cross-sectional study in six German hospitals

AIMS

Regional and interinstitutional variations have been recognized in the increasing incidence of caesarean section. Modes of birth after previous caesarean section vary widely, ranging from elective repeat caesarean section (ERCS) and unplanned repeat caesarean section (URCS) after trial of labour to vaginal birth after caesarean section (VBAC). This study describes interinstitutional variations in mode of birth after previous caesarean section in relation to regional indicators in Germany.

MATERIAL AND METHODS

A cross-sectional study using the birth registers of six maternity units (n=12,060) in five different German states (n=370,209). Indicators were tested by χ2 and relative deviations from regional values were expressed as relative risks and 95% confidence intervals.

RESULTS

The percentages of women in the six units with previous caesarean section ranged from 11.9% to 15.9% (P=0.002). VBAC was planned for 36.0% to 49.8% (P=0.003) of these women, but actually completed in only 26.2% to 32.8% (P=0.66). Depending on the indicator, the units studied deviated from the regional data by up to 32% [relative risk 0.68 (0.47-0.97)] in respect of completed VBAC among all initiated VBAC.

CONCLUSIONS

There is substantial interinstitutional variation in mode of birth following previous caesarean section. This variation is in addition to regional patterns.

The risk of prelabor and intrapartum cesarean delivery among overweight and obese women: possible preventive actions

OBJECTIVE

The purpose of this study was to investigate prelabor and intrapartum cesarean delivery in overweight and obese women by parity, previous cesarean delivery, and labor induction to assess what preventive actions might be possible.

STUDY DESIGN

We modeled relative risks (RRs) and risk differences of prelabor and intrapartum cesarean delivery by prepregnancy body mass index (obese, ≥30 kg/m(2); overweight, 25-29.9 kg/m(2); normal weight, 18.5-24.9 kg/m(2)) in a nationally representative sample of 12,297 French women. Models were stratified by parity and previous cesarean status. Covariates included maternal sociodemographic characteristics, medical conditions, pregnancy complications, and induction of labor.

RESULTS

Risks of prelabor cesarean delivery were elevated only for obese multiparous women. This reflected not only a higher prevalence of previous cesarean delivery (26.4% vs 17.9% for normal-weight women) but also higher risks of prelabor cesarean delivery for multiparous women with no previous cesarean delivery after adjustment for medico-obstetric factors (RR, 1.82; 95% confidence interval [CI], 1.25-2.64). Obese primiparous women and multiparous women with no previous cesarean delivery had similarly increased adjusted RRs for intrapartum cesarean delivery (RR, 1.64; 95% CI, 1.36-1.98; and RR, 1.66; 95% CI, 1.15-2.39, respectively), but the risk difference was higher for primiparous women, with an absolute increase of 0.10 (95% CI, 0.05-0.14) compared with 0.02 (95% CI, 0.00-0.04) for multiparous women. Increased intrapartum cesarean delivery risks for primiparous women were related to more frequent labor induction (42.6% vs 23.8% for normal-weight women).

CONCLUSION

It may be possible to reduce primary and thus repeat cesarean delivery rates among obese women by preventive actions targeting labor induction in primiparous women and prelabor cesarean deliveries in multiparous women. Further research is needed on the impact of limiting inductions on cesarean delivery risks for obese primiparous women.

Maternal, care provider, and institutional-level risk factors for early term elective repeat cesarean delivery: a population-based cohort study

To identify maternal, care provider, and institutional-level risk factors for early term (37-38 weeks) elective repeat cesarean delivery in a population-based cohort. Retrospective cohort study of women in the British Columbia (BC) Perinatal Data Registry, BC, Canada, 2008-2011, with an elective repeat cesarean delivery at term. Absolute percent differences (risk differences) in early term delivery rates were calculated according to maternal characteristics, type of care provider, calendar time (day of the week, time of year), and annual institutional obstetrical volume. Of the 7,687 elective repeat cesareans at term in BC, 55 % occurred before 39 + 0 weeks. Early term delivery was significantly more common with multiple previous cesareans [8.2 percentage points (95 % CI 5.5, 10.9) for 2 previous cesareans, 11.3 (95 % CI 5.1, 17.4) for 3 or more previous cesareans], obesity [6.7 percentage points (95 % CI 1.6, 11.7)], and a hospital obstetrical volume <2,500 deliveries per year. Type of care provider and calendar time were not significant risk factors for early term delivery. Early term elective repeat cesarean was common across a wide range of maternal, care provider, and institutional characteristics, suggesting that most obstetrical care settings would benefit from quality-improvement programs to reduce elective repeat cesarean deliveries before 39 weeks. A better understanding of the risks and benefits of early term delivery among obese women and women with multiple previous cesareans is needed given the higher rates of early term delivery observed in these women.

[Investigation on the approach of delivery after previous cesarean section of Xinjiang Uyghur women]

OBJECTIVE

To explore the appropriate approach of delivery after cesarean section of Uyghur women in primary hospitals in Xinjiang Uyghur Autonomous Region.

METHODS

A total of 5 154 women delivered in Luopu County People Hospital, Hetian Prefecture, Xinjiang Uyghur Autonomous Region from January 2011 to December 2012. Among them, 178 Uyghur women had cesarean section history. The interval between the previous cesarean section and this delivery varied from 1 year to 17 years. The number of cases attempting vaginal labor and the indications of the previous cesarean section were recorded. The indications for the second cesarean section were analyzed. The gestational weeks at delivery, blood loss in 2 hours after delivery, neonatal birth weight, newborn asphyxia, the rate of postpartum fever (≥ 38 °C) and hospitalization days were compared between the two approaches of delivery.

RESULTS

(1) Among the 178 cases, 119 cases attempted vaginal labor, the rate of attempting vaginal labor was 66.9% (119/178). A total of 113 cases succeeded in vaginal delivery (the vaginal delivery group), with the successful rate of attempting vaginal delivery of 95.0% (113/119), and the successful rate of vaginal delivery was 63.5% (113/178). For those 119 women succeeded in vaginal delivery, the indications of the previous cesarean sections were as following: pregnancy complications (68.1%, 81/119), macrosomia(5.0%, 6/119), dystocia (14.3%, 17/119), pregnancies complicated with other diseases (5.0%, 6/119) and cesarean section on maternal request (7.6%, 9/119). (2) 15 cases in the cesarean section group had postpartum hemorrhage, with the incidence of 13.3% (15/113). The mean total labor time was (507 ± 182) minutes. 6 cases attempting vaginal delivery failed and turned to cesarean section. (3) 59 cases received the second cesarean section (the cesarean section group). The rate of second cesarean section was 33.1% (59/178). The indications of the second cesarean section were as following: contracted pelvis (5%, 3/59), pregnancy complications (42%, 25/59), macrosomia (20%, 12/59), short interval between the two cesarean sections (≤ 2 years); (12%, 7/59) and cesarean section on maternal request (20%, 12/59). (4) Gestational weeks at delivery, rates of newborn asphyxia in the vaginal delivery and cesarean section groups showed no significant statistical difference (P > 0.05). In the vaginal delivery group, the average blood loss in 2 hours after delivery was (259 ± 213) ml, the rate of postpartum fever was 10.6%, the mean fetal birth weight was (3 272 ± 477)g and the mean hospitalization was (1.8 ± 1.6) d. In the cesarean section group, they were (400 ± 320) ml, 54.2%, (3 539 ± 500)g and (8.7 ± 2.2)d, respectively. There was significant statistical difference (P < 0.01) between the two groups.

CONCLUSIONS

Vaginal delivery after cesarean section could be attemped in Uyghur pregnant women in Xinjiang primary hospitals, if doctors could choose the indications strictly and monitor closely. These could increase the success rate and safety of vaginal delivery and therefore reduce the cesarean section rate.

Validation of a prediction model for predicting the probability of morbidity related to a trial of labour in Quebec

BACKGROUND

Pregnant women with a history of previous Caesarean section face the decision either to undergo an elective repeat Caesarean section (ERCS) or to attempt a trial of labour with the goal of achieving a vaginal birth after Caesarean (VBAC). Both choices are associated with their own risks of maternal and neonatal morbidity. We aimed to determine the external validity of a prediction model for the success of trial of labour after Caesarean section (TOLAC) that could help these women in their decision-making.

METHODS

We used a perinatal database including 185,437 deliveries from 32 obstetrical centres in Quebec between 2007 and 2011 and selected women with one previous Caesarean section who were eligible for a TOLAC. We compared the frequency of maternal and neonatal morbidity between women who underwent TOLAC and those who underwent an ERCS according to the probability of success of TOLAC calculated from a published model of prediction.

RESULTS

Of 8508 eligible women, including 3113 who underwent TOLAC, both maternal and neonatal morbidities became less frequent as the predicted chance of VBAC increased (P < 0.05). Women undergoing a TOLAC were more likely to have maternal morbidity than those who underwent an ERCS when the predicted probability of VBAC was less than 60% (relative risk [RR] 2.3; 95% CI 1.4 to 4.0); conversely, maternal morbidity was not different between the two groups when the predicted probability of VBAC was at least 60% (RR 0.8; 95% CI 0.6 to 1.1). Neonatal morbidity was similar between groups when the probability of VBAC success was 70% or greater (RR 1.2; 95% CI 0.9 to 1.5).

CONCLUSION

The use of a prediction model for TOLAC success could be useful in the prediction of TOLAC success and perinatal morbidity in a Canadian population. Neither maternal nor neonatal morbidity are increased with a TOLAC when the probability of VBAC success is at least 70%.

Determinants of cesarean delivery: a classification tree analysis

BACKGROUND

Cesarean delivery (CD) rates are rising in many parts of the world. To define strategies to reduce them, it is important to identify their clinical and organizational determinants. The objective of this cross-sectional study is to identify sub-types of women at higher risk of CD using demographic, clinical and organizational variables.

METHODS

All hospital discharge records of women who delivered between 2005 and mid-2010 in the Emilia-Romagna Region of Italy were retrieved and linked with birth certificates. Sociodemographic and clinical information was retrieved from the two data sources. Organizational variables included activity volume (number of births per year), hospital type, and hour and day of delivery. A classification tree analysis was used to identify the variables and the combinations of variables that best discriminated cesarean from vaginal delivery.

RESULTS

The classification tree analysis indicated that the most important variables discriminating the sub-groups of women at different risk of cesarean section were: previous cesarean, mal-position/mal-presentation, fetal distress, and abruptio placentae or placenta previa or ante-partum hemorrhage. These variables account for more than 60% of all cesarean deliveries. A sensitivity analysis identified multiparity and fetal weight as additional discriminatory variables.

CONCLUSIONS

Clinical variables are important predictors of CD. To reduce the CD rate, audit activities should examine in more detail the clinical conditions for which the need of CD is questionable or inappropriate.

Rate of spontaneous onset of labour before planned repeat caesarean section at term

BACKGROUND

Guidelines recommend that, in the absence of compelling medical indications (low risk) elective caesarean section should occur after 38 completed weeks gestation. However, implementation of these guidelines will mean some women go into labour before the planned date resulting in an intrapartum caesarean section. The aim of this study was to determine the rate at which low-risk women planned for repeat caesarean section go into spontaneous labour before 39 weeks.

METHODS

We conducted a population-based cohort study of women who were planned to have an elective repeat caesarean section (ERCS) at 39-41 weeks gestation in New South Wales Australia, 2007-2010. Labour, delivery and health outcome information was obtained from linked birth and hospital records for the entire population. Women with no pre-existing medical or pregnancy complications were categorized as 'low risk'. The rate of spontaneous labour before 39 weeks was determined and variation in the rate for subgroups of women was examined using univariate and multivariate analysis.

RESULTS

Of 32,934 women who had ERCS as the reported indication for caesarean section, 17,314 (52.6%) were categorised as 'low-risk'. Of these women, 1,473 (8.5% or 1 in 12) had spontaneous labour or prelabour rupture of the membranes before 39 weeks resulting in an intrapartum caesarean section. However the risk of labour <39 weeks varied depending on previous delivery history: 25% (1 in 4) for those with spontaneous preterm labour in a prior pregnancy; 15% (1 in 7) for women with a prior planned preterm birth (by labour induction or prelabour caesarean) and 6% (1 in 17) among those who had only previously had a planned caesarean section at term. Smoking in pregnancy was also associated with spontaneous labour. Women with spontaneous labour prior to a planned CS in the index pregnancy were at increased risk of out-of-hours delivery, and maternal and neonatal morbidity.

CONCLUSIONS

These findings allow clinicians to more accurately determine the likelihood that a planned caesarean section may become an intrapartum caesarean section, and to advise their patients accordingly.

Maternal obesity and risk of postcesarean wound complications

OBJECTIVE

To estimate the effect of increasing severity of obesity on postcesarean wound complications and surgical characteristics.

STUDY DESIGN

We performed a retrospective cohort study of consecutive cesarean deliveries at a tertiary care facility from 2004 to 2008. Four comparison groups were defined by body mass index (BMI; kg/cm2): < 30 (n = 728), 30 to 39.9 (n = 1,087), 40 to 49.9 (n = 428), or ≥ 50 (n = 201). The primary outcome was wound complication, defined as wound disruption or infection within 6 weeks postoperatively. Surgical characteristics were compared between groups including administration of preoperative antibiotics, type of skin incision, estimated blood loss (EBL), operative time, and type of skin closure.

RESULTS

Of the 2,444 women with complete follow-up data, 266 (10.9%) developed a wound complication. Compared with nonobese women (6.6%), increasing BMI was associated with an increased risk of wound complications: BMI 30.0 to 39.9, 9.2%, adjusted odds ratio (aOR) 1.4 (95% confidence interval [CI] 0.99 to 2.0); BMI 40.0 to 49.9, 16.8%, aOR 2.6 (95% CI 1.7 to 3.8); BMI ≥ 50, 22.9%, aOR 3.0 (95% CI 1.9 to 4.9). Increasing BMI was also associated with increased rates of midline vertical incision, longer operative time, higher EBL, and lower rates of subcuticular skin closure.

CONCLUSION

A dose-response relationship exists between increasing BMI and risk of postcesarean wound complications. Increasing obesity also significantly influences operative outcomes.

Factors affecting vaginal birth after caesarean section at Middlemore Hospital, Auckland, New Zealand

AIMS

To determine factors associated with vaginal birth after caesarean section (VBAC) in women delivering at Middlemore Hospital (MMH).

METHOD

Retrospective descriptive study. All women in 2008-2009 who had a previous caesarean section and was deemed suitable for a trial of labour (TOL).

RESULTS

Of the 1543 women who had one or more previous caesarean sections, 806 (52.2%) were deemed suitable for a TOL by an obstetrician and self-selected to have a VBAC. Of the 806 women who had a TOL, 592 (73%) had a VBAC. Of women who had a previous VBAC, 257 (91%) delivered vaginally again compared to 332 (64%) without such a history (OR 3.69; 95%CI 1.83-7.43). Increasing parity increased the chances of another vaginal delivery. Variables that led to a failed VBAC were: a BMI =25 in women of single parity (OR 0.47, 95%CI 0.24-0.91), labour augmentation (OR 0.63, 95%CI 0.43-0.93) and epidural analgesia (OR 0.18, 95%CI 0.12-0.28).

CONCLUSION

The VBAC rate at MMH in 2008-2009 was 73% and was higher in women who had a previous VBAC. The VBAC rate is lower in women with a high BMI of single parity and where progress of labour was slow. This information is important in counselling women with a previous caesarean section who are considering a VBAC.

Interventions for supporting pregnant women's decision-making about mode of birth after a caesarean

BACKGROUND

Pregnant women who have previously had a caesarean birth and who have no contraindication for vaginal birth after caesarean (VBAC) may need to decide whether to choose between a repeat caesarean birth or to commence labour with the intention of achieving a VBAC. Women need information about their options and interventions designed to support decision-making may be helpful. Decision support interventions can be implemented independently, or shared with health professionals during clinical encounters or used in mediated social encounters with others, such as telephone decision coaching services. Decision support interventions can include decision aids, one-on-one counselling, group information or support sessions and decision protocols or algorithms. This review considers any decision support intervention for pregnant women making birth choices after a previous caesarean birth.

OBJECTIVES

To examine the effectiveness of interventions to support decision-making about vaginal birth after a caesarean birth.Secondary objectives are to identify issues related to the acceptability of any interventions to parents and the feasibility of their implementation.

SEARCH METHODS

We searched the Cochrane Pregnancy and Childbirth Group's Trials Register (30 June 2013), Current Controlled Trials (22 July 2013), the WHO International Clinical Trials Registry Platform Search Portal (ICTRP) (22 July 2013) and reference lists of retrieved articles. We also conducted citation searches of included studies to identify possible concurrent qualitative studies.

SELECTION CRITERIA

All published, unpublished, and ongoing randomised controlled trials (RCTs) and quasi-randomised trials with reported data of any intervention designed to support pregnant women who have previously had a caesarean birth make decisions about their options for birth. Studies using a cluster-randomised design were eligible for inclusion but none were identified. Studies using a cross-over design were not eligible for inclusion. Studies published in abstract form only would have been eligible for inclusion if data were able to be extracted.

DATA COLLECTION AND ANALYSIS

Two review authors independently applied the selection criteria and carried out data extraction and quality assessment of studies. Data were checked for accuracy. We contacted authors of included trials for additional information. All included interventions were classified as independent, shared or mediated decision supports. Consensus was obtained for classifications. Verification of the final list of included studies was undertaken by three review authors.

MAIN RESULTS

Three randomised controlled trials involving 2270 women from high-income countries were eligible for inclusion in the review. Outcomes were reported for 1280 infants in one study. The interventions assessed in the trials were designed to be used either independently by women or mediated through the involvement of independent support. No studies looked at shared decision supports, that is, interventions designed to facilitate shared decision-making with health professionals during clinical encounters.We found no difference in planned mode of birth: VBAC (risk ratio (RR) 1.03, 95% confidence interval (CI) 0.97 to 1.10; I² = 0%) or caesarean birth (RR 0.96, 95% CI 0.84 to 1.10; I² = 0%). The proportion of women unsure about preference did not change (RR 0.87, 95% CI 0.62 to 1.20; I² = 0%).There was no difference in adverse outcomes reported between intervention and control groups (one trial, 1275 women/1280 babies): permanent (RR 0.66, 95% CI 0.32 to 1.36); severe (RR 1.02, 95% CI 0.77 to 1.36); unclear (0.66, 95% CI 0.27, 1.61). Overall, 64.8% of those indicating preference for VBAC achieved it, while 97.1% of those planning caesarean birth achieved this mode of birth. We found no difference in the proportion of women achieving congruence between preferred and actual mode of birth (RR 1.02, 95% CI 0.96 to 1.07) (three trials, 1921 women).More women had caesarean births (57.3%), including 535 women where it was unplanned (42.6% all caesarean deliveries and 24.4% all births). We found no difference in actual mode of birth between groups, (average RR 0.97, 95% CI 0.89 to 1.06) (three trials, 2190 women).Decisional conflict about preferred mode of birth was lower (less uncertainty) for women with decisional support (standardised mean difference (SMD) -0.25, 95% CI -0.47 to -0.02; two trials, 787 women; I² = 48%). There was also a significant increase in knowledge among women with decision support compared with those in the control group (SMD 0.74, 95% CI 0.46 to 1.03; two trials, 787 women; I² = 65%). However, there was considerable heterogeneity between the two studies contributing to this outcome ( I² = 65%) and attrition was greater than 15 per cent and the evidence for this outcome is considered to be moderate quality only. There was no difference in satisfaction between women with decision support and those without it (SMD 0.06, 95% CI -0.09 to 0.20; two trials, 797 women; I² = 0%). No study assessed decisional regret or whether women's information needs were met.Qualitative data gathered in interviews with women and health professionals provided information about acceptability of the decision support and its feasibility of implementation. While women liked the decision support there was concern among health professionals about their impact on their time and workload.

AUTHORS' CONCLUSIONS

Evidence is limited to independent and mediated decision supports. Research is needed on shared decision support interventions for women considering mode of birth in a pregnancy after a caesarean birth to use with their care providers.

Caesarean section surgical techniques (CORONIS): a fractional, factorial, unmasked, randomised controlled trial

BACKGROUND

Variations exist in the surgical techniques used for caesarean section and many have not been rigorously assessed in randomised controlled trials. We aimed to assess whether any surgical techniques were associated with improved outcomes for women and babies.

METHODS

CORONIS was a pragmatic international 2×2×2×2×2 non-regular fractional, factorial, unmasked, randomised controlled trial that examined five elements of the caesarean section technique in intervention pairs. CORONIS was undertaken at 19 sites in Argentina, Chile, Ghana, India, Kenya, Pakistan, and Sudan. Each site was assigned to three of the five intervention pairs: blunt versus sharp abdominal entry; exteriorisation of the uterus for repair versus intra-abdominal repair; single-layer versus double-layer closure of the uterus; closure versus non-closure of the peritoneum (pelvic and parietal); and chromic catgut versus polyglactin-910 for uterine repair. Pregnant women were eligible if they were to undergo their first or second caesarean section through a planned transverse abdominal incision. Women were randomly assigned by a secure web-based number allocation system to one intervention from each of the three assigned pairs. All investigators, surgeons, and participants were unmasked to treatment allocation. The primary outcome was the composite of death, maternal infectious morbidity, further operative procedures, or blood transfusion (>1 unit) up to the 6-week follow-up visit. Women were analysed in the groups into which they were allocated. The CORONIS Trial is registered with Current Controlled Trials: ISRCTN31089967.

FINDINGS

Between May 20, 2007, and Dec 31, 2010, 15 935 women were recruited. There were no statistically significant differences within any of the intervention pairs for the primary outcome: blunt versus sharp entry risk ratio 1·03 (95% CI 0·91-1·17), exterior versus intra-abdominal repair 0·96 (0·84-1·08), single-layer versus double-layer closure 0·96 (0·85-1·08), closure versus non-closure 1·06 (0·94-1·20), and chromic catgut versus polyglactin-910 0·90 (0·78-1·04). 144 serious adverse events were reported, of which 26 were possibly related to the intervention. Most of the reported serious adverse events were known complications of surgery or complications of the reasons for the caesarean section.

INTERPRETATION

These findings suggest that any of these surgical techniques is acceptable. However, longer-term follow-up is needed to assess whether the absence of evidence of short-term effects will translate into an absence of long-term effects.

FUNDING

UK Medical Research Council and WHO.

How do good candidates for trial of labor after cesarean (TOLAC) who undergo elective repeat cesarean differ from those who choose TOLAC?

OBJECTIVE

Our aim was to compare good candidates for trial of labor after cesarean (TOLAC) who underwent repeat cesarean to those who chose TOLAC.

STUDY DESIGN

Data for all deliveries at 14 regional hospitals over an 8-year period were reviewed. Women with a primary cesarean and 1 subsequent delivery in the dataset were included. The choice of elective repeat cesarean vs TOLAC was assessed in the first delivery following the primary cesarean. Women with ≥70% chance of successful vaginal birth after cesarean as calculated by a published nomogram were considered good candidates for TOLAC. Good candidates who chose an elective repeat cesarean were compared to those who chose TOLAC. Women who were delivered at 2 preselected tertiary centers by a general obstetrician-gynecologist practice were subanalyzed to determine whether there was an effect of physician group.

RESULTS

In all, 5445 women had a primary cesarean and a subsequent delivery. A total of 3120 women were calculated to be good TOLAC candidates. Of this group, 925 (29.7%) chose TOLAC. Women managed by a family practitioner or who were obese were less likely to choose TOLAC while women who were managed by a midwife or had a prior vaginal delivery were more likely to choose TOLAC. At the 2 tertiary centers, 1 general obstetrician-gynecologist group had significantly more patients who chose TOLAC compared to the other obstetrician-gynecologist physician groups (P < .001), with 63% of their patients choosing TOLAC.

CONCLUSION

Less than one-third of the good candidates for TOLAC chose TOLAC. Managing provider influences this decision.

Incidence and determinants of peripartum hysterectomy in the metropolitan area of the District of Columbia

OBJECTIVE

To review the impact of the changes that have occurred in the standard of care in obstetrics and in the trend of cesarean delivery rates in recent times and factors associated with peripartum hysterectomy procedure.

STUDY DESIGN

A retrospective analysis of all cases of peripartum hysterectomies among inpatient hospitalizations at 4 major hospitals in the Washington metropolitan areas of the District of Columbia from January 1, 2000, through December 31, 2009, was conducted.

RESULTS

The total number of deliveries and postpartum hysterectomies that occurred at all 4 locations was 150,847 and 128, respectively. The rate of peripartum hysterectomies per 1,000 deliveries was 0.85. Primary and repeat cesarean deliveries, advanced maternal age, obesity, and grand multiparity have direct association with peripartum hysterectomy. Up to 80% of all cases of peripartum hysterectomy are accounted for by class III and IV hemorrhage. Peripartum hysterectomy is associated with increased prevalence of uterine atony, placenta previa, and placenta accreta.

CONCLUSION

Our results suggest that primary and repeat cesarean deliveries, advanced maternal age, obesity, and grand multiparity, uterine atony, placenta previa, and placental accreta, and class III and IV hemorrhage are independently associated with an increased risk for peripartum hysterectomy. These findings may be of concern given the increasing rate of cesarean deliveries in the District.

Alarming rise of cesarean births: a single center experience

BACKGROUND AND OBJECTIVES

The increase in cesarean section rates requires detailed investigation worldwide. The goal of this study was to analyze the distribution of indications and rates of cesarean sections in a developing country and to introduce the measures for controlling increased cesarean deliveries.

MATERIAL AND METHODS

Electronic medical records of the patients who underwent cesarean section were retrospectively evaluated between the years of 2006 and 2008.

RESULTS

Total of 42,547 vaginal delivery, 104 instrumental vaginal delivery and 28357 cesarean section were performed. The instrumental delivery and cesarean section rates were 0.14 and 39.9%, respectively. The most common indication was repeat cesarean that was present in 9224 patients (32.5%) followed by fetal distress in 6427 patients (22.6%).

CONCLUSIONS

Encouraging vaginal delivery for patients with previous cesarean by community based national approaches seems the leading measure to control the increased rates of cesarean section in developing countries.

Preoperative scar hyperalgesia is associated with post-operative pain in women undergoing a repeat Caesarean delivery

BACKGROUND

Over 1.4 million Caesarean deliveries are performed annually in the United States, out of which 30% are elective repeat procedures. Post-operative hyperalgesia is associated with an increased risk for persistent post-surgical pain; however, there are no data on whether residual scar hyperalgesia (SHA) from a previous Caesarean delivery (CD) persists until the next delivery. We hypothesized that residual SHA may be present in a substantial proportion of women and is associated with increased post-operative pain.

METHODS

One hundred and sixty-three women scheduled for a repeat CD under spinal anaesthesia were enrolled into the study. Mechanical temporal summation (mTS) and SHA index were measured preoperatively. SHA was considered present when the index was >0. Post-operative pain scores at 12, 24 and 48 h and wound hyperalgesia (WHA) at 48 h were recorded.

RESULTS

SHA was present in 67 women 41% with a median SHA index of 0.42 (Q (25)  = 0.25; Q (75)  = 1.1, range 0.03-4.25). Women with SHA had overall higher post-operative pain scores and SHA was correlated with preoperative mTS (r = 0.164, p < 0.05), post-operative pain severity (r = 0.25, p < 0.002) and WHA at 48 h (r = 0.608, p < 0.001). Severe pain (visual analogue pain scale-S48 ≥ 7, n = 20) was predicted with a sensitivity and specificity of 60% and 62%, respectively. Positive predictive value was 18% and negative predictive value was 92%.

CONCLUSIONS

Preoperative SHA is present in 41% of women scheduled for repeat CD and is associated with increased mTS and post-operative pain. Screening for preoperative SHA may predict women at risk for increased post-operative pain, and guide post-operative analgesia to include anti-hyperalgesic drugs.

[Rates of caesarean sections tn two types of private hospitals: restriced-access and open-access]

BACKGROUND

In recent years, rising rates of caesarean section are of concern in the medical community in many countries, especially in Latin America.

OBJECTIVE

Determine if there is a difference in the rate of Caesarean sections in a restricted-access hospital (HC) and an open-access hospital (HA) using the Robson classification to explain potential differences.

MATERIAL AND METHOD

A prospective cohort study was conducted. This in volved all patients that attended the obstetrics sector in the two hospitals in Buenos Aires where they gave birth between 1 June 2009 and 25h January 2010. The open-access hospital is open to doctors with varying professional training and differing clinical practice. The restricted-access hospital, on the other hand, can only be attended by specified doctors with certain professional training; their medical) conduct is based on service standards and clinical practice.

RESULTS

Over the study period 762 patients who fulfilled the study criteria were included from the open-access hospital and 768 from the restricted-access hospital. The global rate of caesarean sections in the HAwas 53.5%, and 48.7% in the HC, RR 1.09 (CI 0.99-1.21) a difference that was not statistically significant (p = 0.058). The onset of spontaneous labour in the HAwas significantly more than in the HC (74.9% vs. 41.8%) RR 2.66 (CU.98-3.57). The induced labour was significantly lower in HA (9,7% vs. 28,3%); RR 0.34 (CI 0.27-0.44). Elective caesarean sections were significantly lower in the HA (15.3% vs. 29.9%) RR 0.51 (CI 0.42-0.62).

CONCLUSION

This study reveals a similar rate of caesarean sections in two private hospitals with different systems of care. However, it observed that the HA has a greater tendency to operate on patients at the onset of spontaneous labour and the HC has a greater number of induced labour and elective caesarean section.

Resolution of complete placenta previa: does prior cesarean delivery matter?

OBJECTIVES

The purpose of this study was to prospectively assess the rate of resolution of complete placenta previa diagnosed at second-trimester sonography in patients with and without previous cesarean delivery.

METHODS

This prospective study evaluated patients at 3 institutions with complete placenta previa diagnosed at second-trimester screening sonography. All patients were followed with sonography every 4 to 6 weeks until either resolution of the previa or delivery occurred. Patients with persistent/nonresolving complete placenta previa underwent cesarean delivery.

RESULTS

A total of 67 patients were enrolled in the study; 18 patients had a prior cesarean delivery. Resolution of placenta previa occurred in 11 of 18 patients (61%) with a prior cesarean delivery, whereas 44 of 49 patients (90%) without a prior cesarean delivery had resolution of placenta previa (P = .012, Fisher exact test). Placental location per se (anterior or posterior) was not associated with resolution of placenta previa (P = .22). Complete placenta previa persisted to delivery in 5 of 9 patients (56%) with a prior cesarean delivery and an anterior placental location.

CONCLUSIONS

This prospective study indicates that patients with a prior cesarean delivery and complete placenta previa diagnosed at second-trimester sonography are less likely to have subsequent resolution of the previa when compared to those without a history of cesarean delivery.

Elective repeat cesarean delivery compared with spontaneous trial of labor after a prior cesarean delivery: a propensity score analysis

OBJECTIVE

The purpose of this study was to determine outcomes, after the use of propensity score techniques, to create balanced groups according to whether a woman undergoes elective repeat cesarean delivery (ERCD) or trial of labor (TOL).

STUDY DESIGN

Women who were eligible for a TOL with 1 previous low transverse incision were categorized according to whether they underwent an ERCD or TOL. A propensity score technique was used to develop ERCD and TOL groups with comparable baseline characteristics. Outcomes were assessed with conditional logistic regression.

RESULTS

The rates of endometritis, operative injury, respiratory distress syndrome, and newborn infant infection were lower and the rates of hysterectomy and wound complication were higher in the ERCD group.

CONCLUSION

Propensity score techniques can be used to generate comparable ERCD and TOL groups. Some types of maternal morbidity (such as hysterectomy) are higher; other types (such as operative injury) are lower in the ERCD group. Although the absolute risk is low, neonatal morbidity appears to be lower in the ERCD group.

[Trial of labor after two cesarean sections: the policy in Israel and four years experience]

INTRODUCTION

Trial of vaginal birth after caesarean is considered acceptable after one caesarean section. However, trial of vaginal birth after more than one caesarean section is still unaccepted by most clinicians. Birth rates in Israel are within the highest in the western world and many women are interested in a trial of labor after two previous caesarean sections. Therefore, it is crucial to establish evidence based guidelines for this issue.

OBJECTIVE

To perform a systematic review of literature on success rate of vaginal birth after two caesarean sections and to present our experience in trial of labor after two caesarean sections.

METHODS

We searched MEDLINE, using search terms "Caesarean section", "caesarian", "C*rean", "C*rian", "Vaginal birth after caesarean section", "Trial of labor".

RESULTS

The literature revealed a success rate of 60-80%. The main complication is rupture of the uterus and its rate is 0-3%. During the years 2006-2009, 67 trials of labor after two caesarean sections were performed in our medical center. Our success rate is 88%. There were no cases of rupture of the uterus.

CONCLUSION

A trial of labor after two caesarean sections is possible for carefully selected women and when appropriate medical resources are available.

The timing of elective caesarean delivery between 2000 and 2009 in England

BACKGROUND

In 2004, the National Institute for Clinical Excellence (NICE) recommended that an elective caesarean section for an uncomplicated pregnancy should not be carried out before 39 completed weeks due to increased risk of respiratory morbidity in newborns. We describe the trends and variation across 63 English NHS trusts in the timing of elective caesarean section (CS) for low-risk singleton deliveries.

METHODS

We identified elective CS deliveries between 1st April 2000 and 28th February 2009 in English NHS trusts using the Hospital Episode Statistics. We selected women with uncomplicated pregnancies who had an elective CS delivery after 34 completed weeks of gestation, and analysed the trends and the trust-level variation in the timing of elective CS. The impact of the NICE guidance on the monthly rate of elective CS deliveries performed after 39 weeks was estimated using an interrupted time-series design with autoregressive integrated moving average (ARIMA).

RESULTS

There were 118,456 elective CS deliveries at the 63 NHS trusts. The overall proportion of elective CS deliveries done after 39 completed weeks steadily increased from 39% in 2000/01 to 63% in 2008/09. The proportions rose from 43% to 67% for women with breech presentation and from 35% to 62% for women with a previous CS. There was significant variation across NHS trusts in each year; in 2008/09, with the proportions of elective CS done after 39 weeks ranging from 28% to 89% (Inter-quartile range limits: 54% to 72%). We found a small but statistically significant increase in the proportion immediately after the publication of the NICE guidance, but its rate of growth rate declined slightly thereafter.

CONCLUSIONS

NHS trusts in our study have responded to the new evidence on the benefits of delaying elective CS to after 39 weeks gestation. However, substantial differences between NHS trusts remain, which indicates there is room for further improvement. We suggest that maternity services and commissioners adopt the "timing of elective caesarean" as a quality indicator to support clinical practice.

Effect of prior cesarean delivery on neonatal outcomes

AIMS

To examine the effect of a prior cesarean delivery on neonatal outcomes.

METHODS

We conducted a retrospective cohort study on all women with a prior livebirth who delivered at the Royal Victoria Hospital between 2001 and 2006. We defined our exposure as a positive history for cesarean delivery and used unconditional logistic regression analysis to estimate the adjusted effect of a previous cesarean delivery on adverse neonatal outcomes.

RESULTS

A total of 18,673 births took place of which 9708 were in women with a prior livebirth (77.0% with no previous cesarean delivery and 23.0% with a previous cesarean delivery). As compared to newborns delivered by mothers with no prior cesarean delivery, increasing number of prior cesarean deliveries was associated with an increasing risk of preterm birth [odds ratio (OR) 1.23, 95% confidence interval (CI) 1.09-1.39]; respiratory distress syndrome (OR 3.54, 95% CI 2.02-5.91); and admission to the neonatal intensive care unit (OR 1.41, 95% CI 1.25-1.60). These findings were predominantly due to differences in gestational age and mode of delivery.

CONCLUSION

Having a prior cesarean delivery is associated with an increased risk of adverse neonatal outcomes. Adverse neonatal outcomes in subsequent pregnancies is additional evidence to suggest that unless specifically indicated, cesarean delivery should be avoided.

[Cesarean birth: justifying indication or justified concern?]

BACKGROUND

Caesarean section is the most common surgery performed in all hospitals of second level of care in the health sector and more frequently in private hospitals in Mexico.

OBJECTIVE

To determine the behavior that caesarean section in different hospitals in the health sector in the city of Aguascalientes and analyze the indications during the same period.

MATERIAL AND METHOD

A descriptive and cross in the top four secondary hospitals in the health sector of the state of Aguascalientes, which together account for 81% of obstetric care in the state, from 1 September to 31 October 2008. Were analyzed: indication of cesarean section and their classification, previous pregnancies, marital status, gestational age, weight and minute Apgar newborn and given birth control during the event.

RESULTS

were recorded during the study period, 2.964 pregnancies after 29 weeks, of whom 1.195 were resolved by Caesarean section with an overall rate of 40.3%. We found 45 different indications, which undoubtedly reflect the great diversity of views on the institutional medical staff to schedule a cesarean section.

CONCLUSIONS

Although each institution has different resources and a population with different characteristics, treatment protocols should be developed by staff of each hospital to have the test as a cornerstone of labor, also request a second opinion before a caesarean section, all try to reduce the frequency of cesarean section.

Trend in cesarean section rate

OBJECTIVE

To investigate factors influencing the increase in cesarean section CS rates, and to implement control measures.

METHODS

This retrospective analysis reviewed the birth registry of the Department of Obstetrics and Gynecology, King Fahd Armed Forces Hospital, Jeddah, Saudi Arabia. We compared the frequency of different indications for CS between January 2007 and December 2008. The numbers of CS studied were 1105 in 2007, while they were 1226 in the year 2008. Thus, the sample size studied was 2331 cesarean deliveries. Approval of the ethical committee for publication was obtained.

RESULTS

The CS rate exceeded the acceptable 15% rate suggested by the World Health Organization (WHO) at our institution, and probably in many other hospitals in Saudi Arabia. Fetal distress, previous single CS, previous multiple CS, and breech presentation were the most common indications for CS.

CONCLUSION

This high rate of CS will continue to increase due to the tendency to have large families, and the self-perpetuating character of each CS. Efforts should be made at each hospital level, and nationwide, to control this tendency.

The change in the rate of vaginal birth after caesarean section

The objective of this study was to determine whether, and to what degree, the change in the vaginal birth after caesarean section (VBAC) rate is due to a change in the characteristics of the obstetric population, the undertaking of a trial of labour (TOL), or the tendency to abandon a TOL once it has been initiated. All women with one prior low transverse caesarean section (CS) and a vertex singleton gestation at term were identified in a registry of CS deliveries occurring at eight academic centres during a 4-year period (1999-2002). Women were classified by their predicted chance of VBAC and year-to-year differences were analysed. Of the 9643 women who met criteria for analysis, 5334 (55.3%) underwent a TOL. From 1999 to 2002, the VBAC rate underwent a steady decline: 51.8% to 45.1% to 37.4% to 29.8% (P < 0.001). Although there were some changes in the characteristics of the population that predispose to successful VBAC, as well as some reduction in the chance that a VBAC is successful once a TOL is undertaken, the most pervasive reason for this decline was that women became increasingly likely to forego a TOL, regardless of their likelihood of vaginal delivery. Based on these results, it appears that the change over time in the VBAC rate is multifactorial, although the greatest change has been a decrease in the frequency with which women undertake a TOL, and this change is observed in all categories of the chance of a successful TOL.

Contemporary cesarean delivery practice in the United States

OBJECTIVE

To describe contemporary cesarean delivery practice in the United States.

STUDY DESIGN

Consortium on Safe Labor collected detailed labor and delivery information from 228,668 electronic medical records from 19 hospitals across the United States, 2002-2008.

RESULTS

The overall cesarean delivery rate was 30.5%. The 31.2% of nulliparous women were delivered by cesarean section. Prelabor repeat cesarean delivery due to a previous uterine scar contributed 30.9% of all cesarean sections. The 28.8% of women with a uterine scar had a trial of labor and the success rate was 57.1%. The 43.8% women attempting vaginal delivery had induction. Half of cesarean for dystocia in induced labor were performed before 6 cm of cervical dilation.

CONCLUSION

To decrease cesarean delivery rate in the United States, reducing primary cesarean delivery is the key. Increasing vaginal birth after previous cesarean rate is urgently needed. Cesarean section for dystocia should be avoided before the active phase is established, particularly in nulliparous women and in induced labor.