Uterine rupture: risk factors and pregnancy outcome

Predicting the risks and recognizing the signs: a two-year prospective population-based study on pregnant women with uterine rupture in The Netherlands

OBJECTIVE

To estimate the incidence of uterine rupture in the Netherlands and evaluate risk indicators prelabour and during labor of women with adverse maternal and/or perinatal outcome.

METHODS

This is a population-based nationwide study using the Netherlands Obstetrics Surveillance System (NethOSS). We performed a two-year registration of pregnant women with uterine rupture. The first year of registration included both women with complete uterine rupture and women with incomplete (peritoneum intact) uterine rupture. The second year of registration included women with uterine rupture with adverse maternal and/or perinatal outcome. We collected maternal and obstetric characteristics, clinical signs, and symptoms during labor and CTG abnormalities. The main outcome measures were incidence of complete uterine rupture and uterine rupture with adverse outcome and adverse outcome defined as major obstetric hemorrhage, hysterectomy, embolization, perinatal asphyxia and/or (neonatal) intensive care unit admission.

RESULTS

We registered 41 women with a complete uterine rupture (incidence: 2.5 per 10,000 births) and 35 women with uterine rupture with adverse outcome (incidence: 0.9 per 10,000 births). No adverse outcomes were found among women with incomplete uterine rupture. Risk indicators for adverse outcome included previous cesarean section, higher maternal age, gestational age <37 weeks, augmentation of labor, migration background from Sub-Saharan Africa or Asia. Compared to women with uterine rupture without adverse outcomes, women with adverse outcome more often expressed warning symptoms during labor such as abdominal pain (OR 3.34, 95%CI 1.26-8.90) and CTG abnormalities (OR 9.94, 95%CI 2.17-45.65). These symptoms were present most often 20 to 60 min prior to birth.

CONCLUSION

Uterine rupture is a rare condition for which several risk indicators were identified. Maternal symptoms and CTG abnormalities are associated with adverse outcomes and time dependent. Further analysis could provide guidance to expedite delivery.

Adenomyosis and fertility-sparing surgery: A literature appraisal

Adenomyosis is an intricate pathological condition that negatively impacts the uterus. It is closely related to the more well-known endometriosis, with which it shares parallels in terms of diagnosis, therapy, and both microscopic and macroscopic features. The purpose of this narrative review is to give a clear univocal definition and outlook on the different, patient-adapted, surgical treatments. MEDLINE and PubMed searches on these topics were conducted from 1990 to 2022 using a mix of selected keywords. Papers and articles were identified and included in this narrative review after authors' revision and evaluation. From the literature analysis, authors reported the following surgical techniques: laparoscopic double/triple-flap method, laparotomic wedge resection of the uterine wall, laparotomic transverse H-incision of the uterine wall, laparotomic wedge-shaped excision, and laparotomic complete debulking excision by asymmetric dissection technique. Each of these techniques has strengths and weaknesses, but the literature data on the pregnancy rate are somewhat limited. The only certain information is the risk of uterine rupture up to 6.0% after surgical treatment for uterine adenomyosis. Over the years, the surgical approach continued to reach a positive result by minimally invasive treatment, with less hospitalization, less postoperative pain, and less blood loss. Over the years, the gynecological surgeon has gained the skills, training and increasingly sophisticated surgical techniques to target effective therapy. That's why a hysterectomy is no longer the only surgical resource to treat adenomyosis, but in patients who wish to preserve the fertility, there is a wide variety of surgical alternatives.

A rare case of uterine rupture in the first trimester of pregnancy: Case report and review of literature

Uterine rupture is a serious and potentially life-threatening complication. It is commonly a complication that happens in the third trimester of pregnancy. Its occurrence in early pregnancy is very rare. We report a case of a patient who presented with uterine rupture on a scarred uterus during the termination of pregnancy with misoprostol at 10 weeks' amenorrhea. In this case, we discuss the clinical warning signs, risk factors, and diagnostic methodology, and compare our approach with the literature.

Clinical outcomes and future fertility after uterine artery embolization for postpartum and post-abortion hemorrhage

BACKGROUND

Postpartum hemorrhage (PPH) and post-abortion hemorrhage (PAH) are life-threatening conditions.

PURPOSE

To evaluate the efficacy and safety of uterine arterial embolization (UAE) for PPH and PAH and to investigate future fertility after UAE.

MATERIAL AND METHODS

This study included 57 consecutive patients (mean age = 34 years) who underwent UAE for PPH (n = 46) and PAH (n = 11) at our institution between January 2011 and December 2022. Technical success, non-visualization of the peripheral portion of bilateral uterine arteries on angiography, and clinical success, complete hemostasis after UAE, were assessed. UAE-associated complications and factors related to clinical success were analyzed. Pregnancy outcomes after UAE and complications during subsequent pregnancy were investigated in 16 patients who desired fertility and were followed up for >1 year.

RESULTS

The technical and clinical success rates were 100% and 84.2%, respectively. Sepsis (n = 1) and uterine empyema (n = 1) were observed as severe complications. Placental disorder, bleeding within 24 h after delivery or abortion, ≥1.5 shock index, ≥6 units of transfusion erythrocytes, and ≥8 obstetrical disseminated intravascular coagulation score were significantly associated with unfavorable clinical outcomes. In total, 16 pregnancies were observed in 12 patients after UAE, three of which were miscarriages and 13 were successful live births. During pregnancy, uterine rupture (n = 1) and accreta (n = 1) were observed.

CONCLUSION

UAE is an effective treatment for PPH and PAH. Although UAE could preserve future fertility, careful attention should be paid to perinatal management for unusual complications.

Risk factors for maternal complications following uterine rupture: a 12-year single-center experience

PURPOSE

To determine maternal outcomes and risk factors for composite maternal morbidity following uterine rupture during pregnancy.

METHODS

A retrospective cohort study including all women diagnosed with uterine rupture during pregnancy, between 2011 and 2023, at a single-center. Patients with partial uterine rupture or dehiscence were excluded. We compared women who had composite maternal morbidity following uterine rupture to those without. Composite maternal morbidity was defined as any of the following: maternal death; hysterectomy; severe postpartum hemorrhage; disseminated intravascular coagulation; injury to adjacent organs; admission to the intensive care unit; or the need for relaparotomy. The primary outcome was risk factors associated with composite maternal morbidity following uterine rupture. The secondary outcome was the incidence of maternal and neonatal complications following uterine rupture.

RESULTS

During the study period, 147,037 women delivered. Of them, 120 were diagnosed with uterine rupture. Among these, 44 (36.7%) had composite maternal morbidity. There were no cases of maternal death and two cases of neonatal death (1.7%); packed cell transfusion was the major contributor to maternal morbidity [occurring in 36 patients (30%)]. Patients with composite maternal morbidity, compared to those without, were characterized by: increased maternal age (34.7 vs. 32.8 years, p = 0.03); lower gestational age at delivery (35 + 5 vs. 38 + 1 weeks, p = 0.01); a higher rate of unscarred uteri (22.7% vs. 2.6%, p < 0.01); and rupture occurring outside the lower uterine segment (52.3% vs. 10.5%, p < 0.01).

CONCLUSION

Uterine rupture entails increased risk for several adverse maternal outcomes, though possibly more favorable than previously described. Numerous risk factors for composite maternal morbidity following rupture exist and should be carefully assessed in these patients.

Perinatal outcomes following uterine rupture during a trial of labor after cesarean: A 12-year single-center experience

OBJECTIVE

To determine perinatal outcomes following uterine rupture during a trial of labor after one previous cesarean delivery (CD) at term.

METHODS

A retrospective single-center study examining perinatal outcomes in women with term singleton pregnancies with one prior CD, who underwent a trial of labor after cesarean (TOLAC) and were diagnosed with uterine rupture, between 2011 and 2022. The primary outcome was a composite maternal outcome, and the secondary outcome was a composite neonatal outcome. Additionally, we compared perinatal outcomes between patients receiving oxytocin during labor with those who did not.

RESULTS

Overall, 6873 women attempted a TOLAC, and 116 were diagnosed with uterine rupture. Among them, 63 (54.3%) met the inclusion criteria, and 18 (28%) had the maternal composite outcome, with no cases of maternal death. Sixteen cases (25.4%) had the composite neonatal outcome, with one case (1.6%) of perinatal death. No differences were noted between women receiving oxytocin and those not receiving oxytocin in the rates of maternal composite (35.7% vs 26.5%, P = 0.502, respectively) or neonatal composite outcomes (21.4% vs 26.5%, P = 0.699).

CONCLUSION

Uterine rupture during a TOLAC entails increased risk for myriad adverse outcomes for the mother and neonate, though possibly more favorable than previously described. Oxytocin use does not affect these risks.

Trial of labor after cesarean, vaginal birth after cesarean, and the risk of uterine rupture: an expert review

The decision to pursue a trial of labor after cesarean delivery is complex and depends on patient preference, the likelihood of successful vaginal birth after cesarean delivery, assessment of the risks vs benefits of trial of labor after cesarean delivery, and available resources to support safe trial of labor after cesarean delivery at the planned birthing center. The most feared complication of trial of labor after cesarean delivery is uterine rupture, which can have catastrophic consequences, including substantial maternal and perinatal morbidity and mortality. Although the absolute risk of uterine rupture is low, several clinical, historical, obstetrical, and intrapartum factors have been associated with increased risk. It is therefore critical for clinicians managing patients during trial of labor after cesarean delivery to be aware of these risk factors to appropriately select candidates for trial of labor after cesarean delivery and maximize the safety and benefits while minimizing the risks. Caution is advised when considering labor augmentation and induction in patients with a previous cesarean delivery. With established hospital safety protocols that dictate close maternal and fetal monitoring, avoidance of prostaglandins, and careful titration of oxytocin infusion when induction agents are needed, spontaneous and induced trial of labor after cesarean delivery are safe and should be offered to most patients with 1 previous low transverse, low vertical, or unknown uterine incision after appropriate evaluation, counseling, planning, and shared decision-making. Future research should focus on clarifying true risk factors and identifying the optimal approach to intrapartum and induction management, tools for antenatal prediction, and strategies for prevention of uterine rupture during trial of labor after cesarean delivery. A better understanding will facilitate patient counseling, support efforts to improve trial of labor after cesarean delivery and vaginal birth after cesarean delivery rates, and reduce the morbidity and mortality associated with uterine rupture during trial of labor after cesarean delivery.

Early Labor Posterior Uterine Wall Rupture in a Primigravid Mother with Successful Repair and Live Birth: A Case Report

Background

Posterior uterine wall rupture is extremely uncommon in the absence of any of the commonly recognized risk factors. Even though uterine rupture is more likely in multiparous people, it cannot be believed that the uterus of a primigravid is impervious to rupture. The objective of this case report is to alert obstetricians about atypical posterior uterine wall rupture presentation in the absence of identifiable risk factors and to emphasize the worth of prompt action.

Case Presentation

A 22-year-old primigravid mother with a 12 cm vertical posterior uterine wall rupture of an unscarred uterus at St. Paul's Hospital in Ethiopia was reported to have survived an intrapartum uterine rupture during the latent early stage of labor while taking a low dose of oxytocin. The baby was saved from the abdominal cavity after an emergency laparotomy was performed. Complete hemostasis was achieved when the posterior uterine wall rupture was repaired in two layers. The patient and her baby were discharged on the fifth postoperative day smoothly.

Conclusion

Posterior uterine wall rupture in a primigravid mother with an unscarred uterus is extremely rare, but a high index of suspicion should be kept in mind as expedited intervention is the only way to save the mother and fetus.

Perinatal morbidity among women with a previous caesarean delivery (PRISMA trial): a cluster-randomised trial

BACKGROUND

Women with a previous caesarean delivery face a difficult choice in their next pregnancy: planning another caesarean or attempting vaginal delivery, both of which are associated with potential maternal and perinatal complications. This trial aimed to assess whether a multifaceted intervention, which promoted person-centred decision making and best practices, would reduce the risk of major perinatal morbidity among women with one previous caesarean delivery.

METHODS

We conducted an open, multicentre, cluster-randomised, controlled trial of a multifaceted 2-year intervention in 40 hospitals in Quebec among women with one previous caesarean delivery, in which hospitals were the units of randomisation and women the units of analysis. Randomisation was stratified according to level of care, using blocked randomisation. Hospitals were randomly assigned (1:1) to the intervention group (implementation of best practices and provision of tools that aimed to support decision making about mode of delivery, including an estimation of the probability of vaginal delivery and an ultrasound estimation of the risk of uterine rupture), or the control group (no intervention). The primary outcome was a composite risk of major perinatal morbidity. This trial was registered with ISRCTN, ISRCTN15346559.

FINDINGS

21 281 eligible women delivered during the study period, from April 1, 2016 to Dec 13, 2019 (10 514 in the intervention group and 10 767 in the control group). None were lost to follow-up. There was a significant reduction in the rate of major perinatal morbidity from the baseline period to the intervention period in the intervention group as compared with the control group (adjusted odds ratio [OR] for incremental change over time, 0·72 [95% CI 0·52-0·99]; p=0·042; adjusted risk difference -1·2% [95% CI -2·0 to -0·1]). Major maternal morbidity was significantly reduced in the intervention group as compared with the control group (adjusted OR 0·54 [95% CI 0·33-0·89]; p=0·016). Minor perinatal and maternal morbidity, caesarean delivery, and uterine rupture rates did not differ significantly between groups.

INTERPRETATION

A multifaceted intervention supporting women in their choice of mode of delivery and promoting best practices resulted in a significant reduction in rates of major perinatal and maternal morbidity, without an increase in the rate of caesarean or uterine rupture.

FUNDING

Canadian Institutes of Health Research (CIHR, MOP-142448).

Predictors of Uterine Rupture After One Previous Cesarean Section: An Unmatched Case-Control Study

Background

Uterine rupture is a rare occurrence but has catastrophic complications during pregnancy. The incidence is relatively higher in scarred uteri because there is a promotion of labor after cesarean section. There is a scarcity of evidence from low-income countries regarding the predictors of uterine rupture after trial labor.

Objective

To assess factors determining uterine rupture during labor after the previous cesarean section among mothers delivered at Hawassa University Comprehensive Specialized Hospital from September 2017 to September 2022.

Methods

A facility-based unmatched case-control study was done by reviewing 105 patients, which included 35 cases and 70 controls in a 1:2 case-to-control ratio. The association between dependent and independent variables was sought with running binary and multivariate analyses by using the cut point of a p value < 0.05 and 95% CI.

Results

The prevalence of uterine rupture is 1.6%. The factors significantly associated with uterine rupture after trial of labor are fetal weight >3.8 kg (AOR: 5.21), antenatal care 4 (AOR: 3.6), labor duration >15 hours (AOR: 10.7), and previous successful vaginal delivery (AOR: 3.4). Poor fetal-maternal outcomes like 91.4% fetal death, 29 hysterectomies, 22 blood transfusions, and 1 death.

Conclusion

The prevalence is relatively higher than in developed countries. The number of antenatal care, labor duration, and lower fetal weight are not common findings associated with uterine rupture after trial of labor across the literature, so large-scale studies are needed to develop guidelines for the Ethiopian setup. Improving the quality of obstetrics care given in each level of health system.

Uterine rupture and factors associated with adverse outcomes

PURPOSE

To review cases of uterine rupture and identify risk factors associated with adverse outcomes.

METHODS

This study is a retrospective cohort of complete uterine ruptures diagnosed in a large hospital system in Massachusetts between 2004 and 2018. Baseline demographics, labor characteristics and outcomes of uterine rupture were collected from medical records.

RESULTS

A total of 173 cases of uterine rupture were identified. There were 30 (17.3%) women with an unscarred uterus, while 142 (82.1%) had a scarred uterus. Adverse outcomes (n = 89, 51.4% of cases) included 26 (15.0%) hysterectomies, 55 (31.8%) blood transfusions, 18 (10.4%) bladder/ureteral injuries, 5 (2.9%) reoperations, 25 (14.5%) Apgar scores lower than 5 at 5 min and 9 (5.2%) perinatal deaths. Uterine rupture of a scarred uterus was associated with decreased risk of hemorrhage (OR 0.40, 95% CI 0.17-0.93), blood transfusion (OR 0.27, 95% CI 0.11-0.69), hysterectomy (OR 0.23, 95% CI 0.08-0.69) and any adverse outcome (OR 0.34, 95% CI 0.13-0.91) compared with unscarred rupture. Uterine rupture during vaginal delivery was associated with increased risk of transfusion (OR 6.55, 95% CI 1.53-28.05) and hysterectomy (OR 8.95, 95% CI 2.12-37.72) compared with emergent C-section.

CONCLUSIONS

Although rare, uterine rupture is associated with adverse outcomes in over half of cases. Unscarred rupture and vaginal delivery demonstrate increased risk of adverse outcomes, highlighting the need for early diagnosis and operative intervention.

Diagnosis and Management of Uterine Rupture in the Third Trimester of Pregnancy: A Case Series and Literature Review

BACKGROUND

 Uterine rupture is associated with clinically significant uterine bleeding, fetal distress, expulsion or protrusion of the fetus, placenta or both into the abdominal cavity requiring prompt cesarean delivery and uterine repair or hysterectomy. Previous cesarean section is the most common risk factor. The most consistent early indicator of it is the onset of prolonged and profound fetal bradycardia.

OBJECTIVE

In this study, we present six cases of uterine rupture highlighting risk factors, and challenges in diagnosis and management, along with a review of the literature.

METHOD

A retrospective case series identified eight cases during the five-year study period. All cases from January 1, 2018 to December 31, 2022 were reviewed. Cases with multiple previous cesarean sections were excluded.

RESULT

Six cases meeting the study criteria were included in our case series. Uterine rupture was a rare occurrence with a prevalence of nine in 31,315 births representing 0.03% of deliveries. No maternal mortality or need for hysterectomy occurred in our study. Fifty percent of uterine ruptures were associated with stillbirths. The most common risk factor was a previous cesarean section in 83.3%. The most common presenting sign was non-reassuring fetal status patterns in 66.6%. A single case had a silent rupture.

CONCLUSION

Signs and symptoms of uterine rupture are nonspecific making diagnosis challenging. Delay in definitive management causes significant fetal morbidity and mortality. For best outcomes, vaginal birth after a previous cesarean section needs close monitoring in appropriately prepared units with the ability to perform immediate cesarean delivery and provide advanced neonatal support.

Outcome of subsequent pregnancies post uterine rupture in previous delivery: A case series, a review, and recommendations for appropriate management

OBJECTIVES

To provide clinicians with concrete solutions on the best management of and counseling for patients in a subsequent pregnancy following uterine rupture.

METHODS

A retrospective analysis of patients treated between 2005 and 2020 at Sheba Medical Center was conducted. All patients who had undergone a complete uterine rupture and subsequently had a full-term pregnancy were included. A literature review was conducted using Pubmed database and including previously published literature reviews.

RESULTS

Fifteen patients with subsequent pregnancies following uterine rupture were included in our cohort. Mean interval between rupture and subsequent pregnancy was 3.8 years (range 2.2-6.9 years). One patient had repeat uterine rupture of less than 2 cm at 36⁺⁵ weeksof pregnancy. A total of 17 studies were selected in this literature review, including a total of 774 pregnancies in 635 patients. The risk of repeated uterine rupture was 8.0% (62/774), ranging from 0% to 37.5%. Overall, the risk of maternal death was of 0.6% (4/635), with only four cases reported in three studies.

CONCLUSION

The risk of recurrence after uterine rupture is significant but should not prevent patients from conceiving.

Outcomes of Uterine Rupture in the Setting of the Unscarred Compared With the Scarred Uterus

Uterine rupture is a rare obstetric complication that is associated with maternal and neonatal morbidity and mortality. The aim of this study was to examine uterine rupture and its outcomes in the setting of the unscarred compared with the scarred uterus. A retrospective observational cohort study was performed examining all cases of uterine rupture in three tertiary care hospitals in Dublin, Ireland, over a 20-year period. The primary outcome was perinatal mortality rate with uterine rupture, which was 11.02% (95% CI 6.5-17.3). There was no significant difference in perinatal mortality between cases of scarred and unscarred uterine rupture. Unscarred uterine rupture was associated with higher maternal morbidity , defined as major obstetric hemorrhage or hysterectomy.

Pregnancies in Women with a Previous Complete Uterine Rupture

Objective

To study the outcomes of new pregnancies after a previous complete uterine rupture.

Design

Descriptive study based on population data from the Medical Birth Registry of Norway, the Patient Administration System, and the medical records. Sample. Maternities with a previous complete uterine rupture in Norway during the period 1967-2011 (N = 72), extracted from 2 455 797 maternities.

Method

We measured the rate of new complete ruptures and partial ruptures, as well as the maternal and perinatal outcomes of these pregnancies. The characteristics of both previous ruptures and new ruptures were described.

Results

Among 72 maternities, there were thirty-seven with previous ruptures in the lower segment (LS) and 35 outside the LS. We found three new complete ruptures and six uneventful partial ruptures, resulting in a rate of 4.2% and 8.3%, respectively. All three complete ruptures occurred preterm in scars outside the LS. The rate of the new complete rupture was 0% in those with previous ruptures in the LS and 8.6% in those with previous ruptures outside the LS. The corrected perinatal mortality was 1.3%, and prematurity (<37 weeks) was high (36.1%); this was noticed even in the absence of new ruptures and was mostly iatrogenic. Two hysterectomies were performed in the absence of rupture and two cases had abnormal invasive placenta.

Conclusion

The prognosis for pregnancies after a previous complete uterine rupture is favorable. Prematurity is a problem caused by both obstetrician and mother's anxiety; therefore, the timing of delivery is the most challenging. Management should include careful counseling, vigilance for symptoms, and immediate delivery when a rupture is suspected.

How to boost an obstetrician's confidence in vaginal delivery after high-intensity focused ultrasound: a comparison study on delivery outcomes

OBJECTIVE

To assess the feasibility of vaginal delivery after HIFU.

METHODS

A total of 37 women who met the trial of labor after HIFU (TOLAH) inclusion criteria and 368 women who met the trial of labor after cesarean delivery (TOLAC) inclusion criteria gave birth at Shanghai First Maternity and Infant Hospital between 14^th June 2018 and 24^th September 2021. The delivery outcomes of the two groups were compared. Multivariable logistic regression analysis was used to estimate the adjusted risk of postpartum hemorrhage (PPH).

RESULTS

In the Qualified Candidates for TOLAH group, vaginal delivery is substantially less common (p = 0.000). The prevalence of PPH in the Qualified Candidates for TOLAH group is lower than in the Candidates for TOLAC group (8.82% vs 10.51%, p = 0.534; 0% vs 2.51%, p = 0.418). Hemoglobin drop in the Qualified Candidates for TOLAH group is also lower (7.03 ± 7.39vs 12.11 ± 12.62, p = 0.001). The rate of using more than two types of uterotonic medications to promote contraction is significantly lower in the Qualified Candidates for TOLAH group (54.05% vs 69.84%, p = 0.04), and the percentage of abnormal uterine contraction is lower in the Qualified Candidates for TOLAH group (35.14% vs 49.18%, p = 0.072). PPH is strongly predicted by abnormal uterine contraction (aOR: 17.177, 95% CI:5.046 ∼ 58.472, p = 0.000), but not by HIFU (aOR:1.105; 95% CI:0.240 ∼ 5.087, p = 0.898). No uterine rupture occurred in the cases after HIFU.

CONCLUSIONS

No uterine rupture occurred in our study group after HIFU. HIFU is not a risk for PPH. It is promising for those after HIFU to choose vaginal delivery.

Vaginal birth after cesarean (VBAC): fear it or dare it? An evaluation of potential risk factors

OBJECTIVES

The consultation of women aspiring a vaginal birth after caesarean may be improved by integrating the individual evaluation of factors that predict their chance of success. Retrospective analysis of correlating factors for all trials of labor after caesarean that were conducted at the Department of Obstetrics of Charité-Universitätsmedizin Berlin, Campus Virchow Clinic from 2014 to October 2017.

METHODS

Of 2,151 pregnant women with previous caesarean, 408 (19%) attempted a vaginal birth after cesarean. A total of 348 women could be included in the evaluation of factors, 60 pregnant women were excluded because they had obstetric factors (for example preterm birth, intrauterine fetal death) that required a different management.

RESULTS

Spontaneous delivery occurred in 180 (51.7%) women and 64 (18.4%) had a vacuum extraction. 104 (29.9%) of the women had a repeated caesarean delivery. The three groups showed significant differences in body mass index, the number of prior vaginal deliveries and the child's birth weight at cesarean section. The indication for the previous cesarean section also represents a significant influencing factor. Other factors such as maternal age, gestational age, sex, birth weight and the head circumference of the child at trial of labor after caesarean showed no significant influence.

CONCLUSIONS

The clear majority (70.1%) of trials of labor after caesarean resulted in vaginal delivery. High body mass index, no previous spontaneous delivery, and fetal distress as a cesarean indication correlated negatively with a successful vaginal birth after cesarean. These factors should be used for the consultation of pregnant women.

The incidence, risk factors and maternal and foetal outcomes of uterine rupture during different birth policy periods: an observational study in China

Background

Currently, there are no studies on changes in the incidence of uterine rupture or maternal and foetal outcomes in women with uterine rupture during different birth policy periods in China. Moreover, the results of association studies of maternal age, parity and previous caesarean section number with the risk of maternal and foetal outcomes in women with uterine rupture have not been consistent. This research aims to conduct and discuss the above two aspects.

Methods

We included singleton pregnant women with no maternal complications other than uterine rupture from January 2012 to June 2019 in China’s National Maternal Near Miss Surveillance System. The data in this study did not differentiate between complete and partial uterine rupture and uterine dehiscence. Through Poisson regression analysis with a robust variance estimator, we compared the incidences of uterine rupture and maternal and foetal outcomes in women with uterine rupture during different birth policy periods in China and determined the relationship between maternal age, parity or previous caesarean section number and uterine rupture or maternal and foetal outcomes in women with uterine rupture.

Results

This study included 8,637,723 pregnant women. The total incidences of uterine rupture were 0.13% (12,934) overall, 0.05% during the one-child policy, 0.12% during the partial two-child policy (aRR = 1.96; 95% CI: 1.53–2.52) and 0.22% (aRR = 2.89; 95% CI: 1.94 4.29) during the universal two-child policy. The maternal near miss and stillbirth rates in women with uterine rupture were respectively 2.35% (aRR = 17.90; 95% CI: 11.81–27.13) and 2.12% (aRR = 4.10; 95% CI: 3.19 5.26) overall, 5.46 and 8.18% during the first policy, 1.72% (aRR = 0.60; 95% CI: 0.32–1.17) and 2.02% (aRR = 0.57; 95% CI: 0.37–0.83) during the second policy, and 1.99% (aRR = 0.90; 95% CI: 0.52–1.53) and 1.04% (aRR = 0.36; 95% CI: 0.24–0.54) during the third policy. The risk of uterine rupture increased with parity and previous caesarean section number.

Conclusion

The uterine rupture rate in China continues to increase among different birth policy periods, and the risk of maternal near miss among women with uterine rupture has not significantly improved. The Chinese government, obstetricians, and scholars should work together to reverse the rising rate of uterine rupture and improve the pregnancy outcomes in women with uterine rupture.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12884-021-03811-8.

Rupture Uterus in a Tertiary Care Centre: A Descriptive Cross-sectional Study

INTRODUCTION

Rupture uterus is an obstetric catastrophe with poor maternal and fetal outcome. The objective of the study is to determine the prevalence of rupture uterus in pregnancy.

METHODS

This was a descriptive cross sectional study conducted in a tertiary care centre from January 2016 to December 2016 after taking ethical approval (Approval No. F-NMC-510/76/77) from Institutional Review Committee. Convenience sampling method was used. Data were entered in the Microsoft Excel sheet and obtained data was analysed using Statistical Package for Social Sciences version 18 software for central tendency and frequencies.

RESULTS

Out of total 1559 deliveries, prevalence of rupture uterus was found to be 12 (0.0077%). Previous lower segment caesarean scar rupture was the most common risk factor noted in 7 (58.3%) cases. A total of seven patients (58.3%) required intensive care unit admission and blood transfusion. Other maternal complications were surgical site infection 2 (16.67%), sepsis 2 (16.67%), paralytic ileus 1 (8.3%), pelvic collection 1 (8.3%) and vesico vaginal fistula 1 (8.3%). Two maternal deaths (16.67%) and perinatal death was noted in 8 (66.66 % ) cases.

CONCLUSIONS

Rupture uterus most commonly occurred in scarred uterus. Identification of high risk pregnancy, judicious caesarean section, proper labor monitoring, early diagnosis and prompt management are essential in reducing its occurrences.

Maternal and perinatal mortality and morbidity of uterine rupture and its association with prolonged duration of operation in Ethiopia: A systematic review and meta-analysis

Background

Uterine rupture is the leading cause of maternal and perinatal morbidity and it accounts for 36% of the maternal mortality in Ethiopia. The maternal and perinatal outcomes of uterine rupture were inconclusive for the country. Therefore, this systematic review and meta-analysis aimed to estimate the pooled maternal and perinatal mortality and morbidity of uterine rupture and its association with prolonged duration of operation.

Methods

The Preferred Reporting Items for Systematic Reviews and Meta-Analyses checklist was used for this systematic review and meta-analysis. We systematically used PubMed, Cochrane Library, and African Journals online databases for searching. The Newcastle- Ottawa quality assessment scale was used for critical appraisal. Egger’s test and I² statistic used to assess the check for publication bias and heterogeneity. The random-effect model was used to estimate the pooled prevalence and odds ratios with 95% confidence interval (CI).

Results

The pooled maternal mortality and morbidity due to uterine rupture in Ethiopia was 7.75% (95% CI: 4.14, 11.36) and 37.1% (95% CI: 8.44, 65.8), respectively. The highest maternal mortality occurred in Southern region (8.91%) and shock was the commonest maternal morbidity (24.43%) due to uterine rupture. The pooled perinatal death associated with uterine rupture was 86.1% (95% CI: 83.4, 89.9). The highest prevalence of perinatal death was observed in Amhara region (91.36%) and the lowest occurred in Tigray region (78.25%). Prolonged duration of operation was a significant predictor of maternal morbidity (OR = 1.39; 95% CI: 1.06, 1.81).

Conclusions

The percentage of maternal and perinatal deaths due to uterine rupture was high in Ethiopia. Uterine rupture was associated with maternal morbidity and prolonged duration of the operation was found to be associated with maternal morbidities. Therefore, birth preparedness and complication readiness plan, early referral and improving the duration of operation are recommended to improve maternal and perinatal outcomes of uterine rupture.

Spontaneous fundal uterine rupture in a non-labouring 31-week twin pregnancy and unknown previous hysteroscopic adhesiolysis: A case report

A 46-year-old woman presented at 31 weeks of gestation with a twin pregnancy (dichorionic, diamniotic) and with mild abdominal pain, not in labour, leading to complete spontaneous fundal uterine rupture. She underwent prompt surgical intervention and resuscitation with packed red cells, cell-salvage blood and fresh frozen plasma (FFP). Twin 1 survived and twin 2 died. Risk factors for fundal uterine rupture were multiple pregnancy and hysteroscopic adhesiolysis, which was unknown during antenatal care. The mother and twin 1 made excellent progress post-operatively. This case highlights the importance of swift intervention to minimise maternal and perinatal morbidity and mortality.

•

Uterine rupture during pregnancy can occur when the patient is not in labour.

•

Prompt surgical intervention minimises the chance of both maternal and perinatal mortality.

•

Risk factors for uterine rupture include previous hysteroscopic procedure.

•

Uterine rupture has been reported as early as the 10th week of pregnancy.

Ultrasonic manifestations and clinical analysis of 25 uterine rupture cases

PURPOSE

To explore the risk factors, ultrasonic manifestations, clinical features, and maternal and neonatal outcomes associated with complete uterine rupture.

BASIC PROCEDURES

All cases of complete uterine rupture diagnosed and treated in Jiangxi Maternal and Child Health Hospital from January 2012 to July 2018 were retrospectively analyzed. Risk factors, ultrasonic manifestations, clinical features, and maternal and infant outcomes were analyzed.

RESULT

All patients had a history of uterine surgery or induced abortion. Ultrasound examination revealed 15 cases of complete rupture of the uterus, five cases of missed diagnosis, three cases of misdiagnosis, and two cases of direct emergency operation without ultrasonography because of typical clinical manifestations and critical conditions. The clinical manifestations of 25 cases of uterine rupture varied from asymptomatic to clinical signs of "resting" rupture of the uterus to severe pain, hypotension, shock, and coma. All patients underwent surgical treatment, of which one case underwent DIC and died after rescue. The maternal mortality rate was 4% (1/25), the mortality rate of newborns (two pregnant women was twins) was 44% (12/27).

CONCLUSION

A history of uterine surgery is a major risk factor for uterine rupture. Attention should be paid not only to women who are pregnant again after cesarean section but also to those who have undergone other uterine operations (such as laparoscopic myomectomy, laparoscopic cornual pregnancy removal, etc.), delivery plans should be formulated accordingly. In cases of sudden abdominal pain during pregnancy or childbirth, the possibility of uterine rupture should be considered to achieve a timely and correct diagnosis and treatment.

Uterine rupture in patients with a history of multiple curettages: Two case reports

BACKGROUND

Uterine rupture is a serious obstetric emergency, a severe event, and a serious threat to maternal and fetal life. It is a rare and not well characterized by the fact that multiple operations of uterine cavities contribute to uterine rupture during pregnancy. Atypical uterine rupture is easily misdiagnosed as other obstetric or surgical diseases. In current guidelines, abdominocentesis is a contraindication for late pregnancy. Therefore, the cases presented in this report provide new ideas for clinical diagnosis and treatment of uterine rupture.

CASE SUMMARY

Case 1, a 34-year-old woman (gravida 5, para 2), 32 wk and 4 d of gestation, presented with acute upper abdominal pain for 8 h with nausea and vomiting. Computed tomography (CT) revealed pelvic and abdominal effusion. We extracted 3 mL unclotted blood from her abdominal cavity. An emergency caesarean section was performed. A uterine rupture was found, and the fimbrial portion of the left fallopian tube was completely adhered to the rupture. The prognosis of both the mother and the infant was good. Case 2, a 39-year-old woman (gravida 10, para 1) at 34 wk and 3 d of gestation complained of persistent lower abdominal pain for half a day. Her vital signs were normal. CT revealed a high probability of pelvic and abdominal hemoperitoneum. We extracted 4 mL dark red blood without coagulation. An emergency laparotomy was performed. Uterine rupture was identified during the operation. Postoperative course in both the mother and infant was uneventful.

CONCLUSION

For pregnant women in the second or the third trimester with persistent abdominal pain, abdominal effusion, fetal distress and even fetal death, the possibility of uterine rupture should be highly suspected. CT can identify acute abdominal surgical or gynecological and obstetric diseases. Abdominocentesis is helpful for diagnosing and clarifying the nature of effusion, but its clinical value need to be confirmed by further clinical studies.

Prevalence and predictors of uterine rupture among Ethiopian women: A systematic review and meta-analysis

Background

Uterine rupture has a significant public health importance, contributing to 13% of maternal mortality and 74%-92% of perinatal mortality in Sub-Saharan Africa, and 36% of maternal mortality in Ethiopia. The prevalence and predictors of uterine rupture were highly variable and inconclusive across studies in the country. Therefore, this systematic review and meta-analysis aimed to estimate the pooled prevalence and predictor of uterine rupture in Ethiopia.

Methods

This systematic review and meta-analysis followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses 2009 checklist. PubMed, Cochrane Library, Google Scholar, and African Journals Online databases were searched. The Newcastle- Ottawa quality assessment tool was used for critical appraisal. I² statistic and Egger’s tests were used to assess the heterogeneity and publication bias, respectively. The random-effects model was used to estimate the pooled prevalence and odds ratios with a 95% confidence interval.

Results

Sixteen studies were included, with a total of 91,784 women in the meta-analysis. The pooled prevalence of uterine rupture was 2% (95% CI: 1.99, 3.01). The highest prevalence was observed in the Amhara regional state (5%) and the lowest was in Tigray region (1%). Previous cesarean delivery (OR = 9.95, 95% CI: 3.09, 32.0), lack of antenatal care visit (OR = 8.40, 95% CI: 4.5, 15.7), rural residence (OR = 4.75, 95% CI: 1.17, 19.3), grand multiparity (OR = 4.49, 95% CI: 2.83, 7.11) and obstructed labor (OR = 6.75, 95%CI: 1.92, 23.8) were predictors of uterine rupture.

Conclusion

Uterine rupture is still high in Ethiopia. Therefore, proper auditing on the appropriateness of cesarean section and proper labor monitoring, improving antenatal care visit, and birth preparedness and complication readiness plan are needed. Moreover, early referral and family planning utilization are the recommended interventions to reduce the burden of uterine rupture among Ethiopia women.

Maternal and perinatal outcomes of uterine rupture in Lubumbashi, Democratic Republic of Congo

Introduction: Uterine rupture is one of the peripartum complications, which cause nearly about one out of thirteen maternal deaths. This study aimed to assess the prevalence and associated factors of mortality among women with uterine rupture in referral hospitals of Lubumbashi, in the south east part of the Democratic Republic of Congo. Methods: Institution based cross sectional study was conducted from December 1st, 2012 to 31st, 2016 on uterine rupture. During the study selected 158 women were included by using exhaustive sampling method. Data were checked, coded and analyzed into STATA version 12. Chi-square test was used to identify the predictors of maternal and perinatal mortalities in women with uterine rupture and 95% Confidence Interval of odds ratio at p - value less than 0.05 was taken as a significance level. Results: The overall prevalence of uterine rupture was 0.49%. The average age of the patients was 29.5 ± 6.2 years and 71.52% of them were between 20 and 34 years old; more than 60% had a parity ≥4 (average parity: 4.7 ± 2.5). 81.17% of the cases had a fully ruptured uterus and 51.17% of the uterine ruptures were located in the lower segment. Repair of the pregnant ruptured uterus was performed in 93.04% of the cases and hysterectomy in 5.06%. Maternal and perinatal mortalities were 8.86% and 72.04% respectively. Regarding maternal mortality, no parameter showed a significant association with maternal death. As for perinatal mortality, parity ≥4, complete rupture and segmento-corporeal lesion were significantly associated with perinatal death (p < 0.05). Conclusion: Uterine rupture remains one of the causes of maternal and perinatal mortality in Lubumbashi. The place occupied by uterine ruptures in obstetric activity requires joint and urgent action by all stakeholders in the health system in order to combat this scourge, witness to poor quality obstetric care.

Uterine rupture and long-term cardiovascular hospitalization of the offspring

BACKGROUND

Uterine rupture is associated with severely adverse maternal and neonatal outcomes. The association between uterine rupture and long-term cardiovascular hospitalization of the offspring has not been investigated yet.

METHODS

In a population-based cohort study, the incidence of cardiovascular related hospitalizations was compared between singletons born to mothers with and without uterine rupture in the current pregnancy. Cardiovascular hospitalization up to the age of 18 years was assessed according to a predefined set of ICD-9 codes associated with offspring hospitalization. Multiple gestations, perinatal deaths, lacking prenatal care, and children with congenital malformations or chromosomal abnormalities were excluded from the study. A Kaplan-Meier survival curve was used to assess cumulative incidence of cardiovascular hospitalization of the offspring. A Cox proportional hazards model was performed to control for confounders.

RESULTS

During the study period, 238,622 newborns met the inclusion criteria, of which 0.053% (n = 127) were born to mothers with uterine rupture in the current pregnancy. Children born to mothers with uterine rupture had significantly higher rates of cardiovascular related hospitalization (Kaplan-Meier's survival curve log-rank test, p=.005).

CONCLUSION

Being born following uterine rupture is an independent risk factor for long-term pediatric cardiovascular hospitalization. Highlights Uterine rupture is a risk factor for long-term pediatric cardiovascular related hospitalization. Rising rate of CS potentially associate to long-term offspring cardiovascular disease. Cardiovascular surveillance is needed for newborns delivered after uterine rupture.

The Impact of Severe Maternal Morbidity on Perinatal Outcomes in High Income Countries: Systematic Review and Meta-Analysis

While there is clear evidence that severe maternal morbidity (SMM) contributes significantly to poor maternal health outcomes, limited data exist on its impact on perinatal outcomes. We undertook a systematic review and meta-analysis to ascertain the association between SMM and adverse perinatal outcomes in high-income countries (HICs). We searched for full-text publications in PubMed, Embase, Cumulative Index of Nursing and Allied Health Literature (CINAHL), and Scopus databases. Studies that reported data on the association of SMM and adverse perinatal outcomes, either as a composite or individual outcome, were included. Two authors independently assessed study eligibility, extracted data, and performed quality assessment using the Newcastle-Ottawa Scale. We used random-effects modelling to calculate odds ratios (ORs) with 95% confidence intervals. We also assessed the risk of publication bias and statistical heterogeneity using funnel plots and Higgins I2, respectively. We defined sub-groups of SMM as hemorrhagic disorders, hypertensive disorders, cardiovascular disorders, hepatic disorders, renal disorders, and thromboembolic disorders. Adverse perinatal outcome was defined as preterm birth (before 37 weeks gestation), small for gestational age (SGA) (birth weight (BW) < 10th centile for gestation), low birthweight (LBW) (BW < 2.5 kg), Apgar score < 7 at 5 min, neonatal intensive care unit (NICU) admission, stillbirth and perinatal death (stillbirth and neonatal deaths up to 28 days). A total of 35 studies consisting of 38,909,426 women were included in the final analysis. SMMs associated with obstetric hemorrhage (OR 3.42, 95% CI: 2.55-4.58), severe hypertensive disorders (OR 6.79, 95% CI: 6.06-7.60), hepatic (OR 3.19, 95% CI: 2.46-4.13) and thromboembolic disorders (OR 2.40, 95% CI: 1.67-3.46) were significantly associated with preterm birth. SMMs from hypertensive disorders (OR 2.86, 95% CI: 2.51-3.25) or thromboembolic disorders (OR 1.48, 95% CI: 1.09-1.99) were associated with greater odds of having SGA infant. Women with severe hemorrhage had increased odds of LBW infant (OR 2.31, 95% CI: 1.57-3.40). SMMs from obstetric hemorrhage (OR 4.16, 95% CI: 2.54-6.81) or hypertensive disorders (OR 4.61, 95% CI: 1.17-18.20) were associated with an increased odds of low 5-min Apgar score and NICU admission (Severe obstetric hemorrhage: OR 3.34, 95% CI: 2.26-4.94 and hypertensive disorders: OR 3.63, 95% CI: 2.63-5.02, respectively). Overall, women with SMM were 4 times more likely to experience stillbirth (OR 3.98, 95%C 3.12-7.60) compared to those without SMM with cardiovascular disease (OR 15.2, 95% CI: 1.29-180.60) and thromboembolic disorders (OR 9.43, 95% CI: 4.38-20.29) conferring greatest risk of this complication. The odds of neonatal death were significantly higher in women with SMM (OR 3.98, 95% CI: 2.44-6.47), with those experiencing hemorrhagic (OR 7.33, 95% CI: 3.06-17.53) and hypertensive complications (OR 3.0, 95% CI: 1.78-5.07) at highest risk. Overall, SMM was also associated with higher odds of perinatal death (OR 4.74, 95% CI: 2.47-9.12) mainly driven by the increased risk in women experiencing severe obstetric hemorrhage (OR 6.18, 95% CI: 2.55-14.96). Our results highlight the importance of mitigating the impact of SMM not only to improve maternal health but also to ameliorate its consequences on perinatal outcomes.

Uterine rupture and the risk for offspring long-term respiratory morbidity

Introduction: Uterine rupture during labor is a life-threatening event associated with high morbidity for both mother and fetus. While the immediate maternal and neonatal outcomes of uterine rupture are well established, less is known regarding the long-term respiratory morbidity of offspring which survived uterine rupture.Aim: To assess whether a history of uterine rupture at birth, is associated with an increased risk for future offspring respiratory morbidity.Materials and methods: In this population-based retrospective cohort study, all singleton deliveries between 1991 and 2014 were included. Known offspring chromosomal or congenital anomalies and cases of perinatal mortality were excluded from the analysis. The incidence of hospitalizations with respiratory morbidities, predefined in a set of ICD-9 codes, was compared between offspring delivered with or without uterine rupture. Cox proportional hazards models were conducted, to control for each confounder separately.Results: During the study period 238,622 deliveries met the inclusion criteria, of those 127 (0.053%) were complicated by uterine rupture. Rates of respiratory related hospitalizations were 7.1 and 4.9%, among offspring delivered with or without uterine rupture, respectively (p = .22), and in the Kaplan- Meier survival curves, no significant differences were found between the groups (log rank test p = .241). While using Cox proportional hazards models and controlling for each confounder separately, uterine rupture was not found to be an independent risk factor for long-term respiratory morbidity of the offspring.Conclusion: Uterine rupture was not found as an independent risk factor for offspring long-term respiratory morbidity. The limited number of cases in the exposed group, could only demonstrate a trend with no significance, and therefore further investigation is required.

Misdiagnosis of a twin pregnancy with double-corner uterine rupture following salpingectomy and protrusion of the amniotic sac as an adnexal cyst: a case report

Background

Salpingectomy-associated uterine rupture during intrauterine pregnancy is rare in the clinic. We report a case of pregnancy with bilateral rupture of the uterine horns after bilateral salpingectomy.

Case presentation

A 30-year-old woman of Han ethnicity presented with right epigastric pain at 28 weeks and 6 days of gestation. Examination by colour Doppler ultrasound showed the following: “Twin live births with normal foetal umbilical artery blood flow indexes and a 183 mm × 112 mm anechoic zone in the right front of the uterus”. Initially, we made an incorrect judgement wherein we considered the amniotic sac that was protruding into the abdominal cavity to be an adnexal cyst. Fortunately, the diagnosis of uterine rupture was confirmed before the protruded amniotic sac broke. The mother did not bleed much, and the twin foetuses survived in our case.

Conclusion

A previous history of salpingectomy via laparoscopy could be a risk factor for uterine rupture in pregnant women. Attention should be paid to rare complications of pregnancy. To avoid adverse events, we should pay special attention to women with a history of laparoscopic salpingectomy who complain about abdominal discomfort and offer them a relevant ultrasound examination.

Urogenital and pelvic complications in the Ehlers-Danlos syndromes and associated hypermobility spectrum disorders: A scoping review

The Ehlers-Danlos syndromes (EDS) and associated hypermobility spectrum disorders (HSD) are a heterogenous group of connective tissue disorders associated with significant morbidity. The urogenital aspects of these disorders are understudied and there is little guidance on the prevalence, types, or outcomes of urogenital complications in EDS/HSD. Our objective was to perform a scoping review to characterize and synthesize the literature reporting urogenital and pelvic complications in EDS/HSD patients. We performed a systematic search of three databases (Medline, CINAHL, Embase) to January 2019. English language, full-text articles reporting on urogenital or pelvic complications in EDS/HSD were included. A total of 105 studies were included (62 case reports/series, 43 observational) involving patients with hypermobile (23%), vascular (20%), classical (12%) EDS, and HSD (24%). Some studies looked at multiple subtypes (11%) or did not report subtype (33%). Reported complications included urinary (41%), gynecological (36%), obstetrical (25%), renal (9%), and men's health problems (7%), with some studies reporting on multiple areas. Urinary and gynecological complications were most prevalent in patients with HSD, while a broad range of complications were reported in EDS. While further research is required, results suggest a higher index of suspicion for urogenital problems is probably warranted in this population.

Induction of labor in women with a scarred uterus: does grand multiparity affect the risk of uterine rupture?

BACKGROUND

Previous cesarean delivery is the most important risk factor for subsequent uterine rupture. Data are inconsistent regarding grand multiparity (≥6th delivery) and a risk for uterine rupture. Specifically, no data exist regarding the risk that is associated with labor induction or augmentation in grand multiparous women after cesarean delivery.

OBJECTIVE

This study aimed to examine whether grand multiparity elevates the risk for uterine rupture in trials of labor after 1 previous cesarean that involved induction or augmentation of labor.

STUDY DESIGN

A retrospective multicenter study was conducted that included all trials of labor after cesarean delivery at 24-42 gestational weeks with vertex presentation between the years 2003-2015. The study groups were defined in the following manner: (1) grand multiparous parturients (current delivery ≥6) who underwent labor induction or augmentation; (2) multiparous parturients (delivery 2-5) who underwent induction or augmentation; (3) grand multiparous parturients with no induction or augmentation of labor. The primary outcome was uterine rupture rate, which was defined as complete separation of all uterine layers. Secondary outcomes were obstetric and neonatal complications.

RESULTS

A total of 12,679 labors were included in the study. The study group included 1304 labors of grand multiparous parturients after 1 previous cesarean delivery, of which 800 parturients underwent induction of labor and 504 parturients received labor augmentation. The multiparous group included 3681 parturients with either labor induction or augmentation. The third group included 7694 grand multiparous parturients without induction or augmentation. Incidence of uterine rupture was similar among the 3 study groups (0.3%, 0.3%, and 0.2%, respectively; P=.847). In the multivariable model that was adjusted for maternal age, ethnicity, diabetes mellitus, birthweight, and prolonged second stage of labor, no association was found between grand multiparity and uterine rupture in women with a scarred uterus who underwent labor induction or augmentation.

CONCLUSION

Labor induction/augmentation during trial of labor after cesarean delivery in grand multiparous parturients appears to be a reasonable option that has a similar uterine rupture risk as in multiparous parturients. Avoiding a mandatory cesarean delivery enables reduction of the risk for future multiple cesarean deliveries.

Atypical presentation of hemorrhagic shock in pregnancy: a case highlighting the developing field of emergency medicine in Israel

BACKGROUND

Occult hemorrhagic shock secondary to uterine rupture represents a true obstetric emergency and can result in significant morbidity and mortality for both the patient and the fetus. Multiparity and prior cesarean sections are known risk factors. Typically, these patients present late in gestation, often secondary to the physiologic stresses on the uterus related to contractions. This pathology is less common earlier in pregnancy and can often be overlooked in the acute setting.

CASE PRESENTATION

We present the case of a 31-year-old female with three prior gestations, two parities and two prior cesarean sections, resulting in three live births, who presented to the Emergency Department (ED) 22-weeks pregnant with acute onset dyspnea and an episode of syncope. Due to her altered mental status there was concern for occult shock, despite normal vital signs. Large amounts of free fluid in the abdomen were noted on bedside ultrasonography with a high suspicion for uterine pathology. She was resuscitated with blood and taken immediately to the operating room for surgical management where she was found to have had a uterine rupture.

CONCLUSION

This case highlights a rare presentation of a well-known obstetric emergency, due to the patient's development of uterine rupture early in gestation. Consequently, emergency physicians should consider atraumatic hypovolemic shock, secondary to this obstetric catastrophe, even at a stage that far precedes its expected presentation. In addition, we make note of how this case validated our department's integrated emergency medicine model, the first in the State of Israel.

Influence of Caesarean section-pregnancy interval on uterine rupture risk and IVF pregnancy rates: systematic review and mathematical modelling

RESEARCH QUESTION

What is the influence of the Caesarean section-pregnancy interval (CSPI) on the risk of uterine rupture, and what are the repercussions on IVF pregnancy rates of prolonging it?

STUDY DESIGN

Systematic searches were performed using PubMed MEDLINE to identify studies published up until July 2017 for articles with the following keywords: 'interdelivery interval' and 'uterine rupture'; 'interpregnancy interval' and 'uterine rupture'; 'interpregnancy interval' and 'cesarean section'; and 'uterine rupture' and 'cesarean section'. The search identified 1609 articles, of which six were included (involving 56,419 women). Four reported significantly higher uterine rupture rates in cases of a short CSPI.

RESULTS

From the analysis, the uterine rupture rate can be modelled by a formula corresponding to a hyperbolic curve. There is no clear cut-off in uterine rupture in relation to CSPI. The curve showed a sharp decrease in uterine rupture until the 10th month of CSPI (uterine rupture rate 0.7%), then a moderate and steady decrease until the 40th month (uterine rupture rate 0.4%) and afterwards a very mild decrease. From the data it is possible to calculate, according to the age of the woman, the expected reduction in IVF rates and uterine rupture as CSPI increases.

CONCLUSION

The risk of uterine rupture in relation to CSPI can be represented by means of a hyperbolic curve. After a 10-month CSPI, the expected uterine rupture rate is close to 0.7%. The impact of prolonging or reducing this interval on IVF pregnancy rates can be easily obtained from the table included in the article. This should be helpful in the decision-making process for both patients and physicians.

Grandmultiparity, maternal age, and the risk for uterine rupture-A multicenter cohort study

INTRODUCTION

Uterine rupture is a critical complication causing fetal and maternal morbidity and mortality. Data are conflicting regarding whether grandmultiparity (parity ≥ 6) is a risk factor. This multicenter cohort study aimed to determine whether grandmultiparity (parity ≥ 6) poses a risk for uterine rupture in women with no previous cesarean delivery.

MATERIAL AND METHODS

A multicenter retrospective study of deliveries that occurred between the years 2003 and 2015 in three tertiary medical centers. Deliveries of grandmultiparous women were compared with those of multiparous women (parity 2-5). Women with previous cesarean deliveries were excluded. Multivariable regression modeling was applied to control for possible confounders.

RESULTS

A total of 388 784 deliveries of multiparous women with unscarred uteri were recorded during the study period, including 53 965 deliveries of grandmultiparous women and 334 819 deliveries of multiparous women. Grandmultiparous women were significantly older (33.9 ± 5 vs 27.3 ± 5 years; P < 0.0001). Fourteen cases of uterine rupture were recorded in the grandmultiparae group (1 per 3855 labors) vs 41 in the multiparae group (1 per 8166 labors) (odds ratio [OR] 2.07, 95% confidence interval [95% CI] 1.13-3.81; P = 0.030). However, in a multivariable model controlling for maternal age, the association between grandmultiparity and uterine rupture lost its significance (adjusted OR 1.26, 95% CI 0.66-2.41; P = 0.491), and maternal age emerged as an independent predictor of uterine rupture (adjusted OR 1.08, 95% CI 1.04-1.13; P < 0.0001). Additionally, the risk for uterine rupture was elevated in a linear fashion, concomitant with age.

CONCLUSIONS

Maternal age is a risk factor for uterine rupture. Grandmultiparity does not increase the risk beyond that associated with maternal age.

Maternal outcome after complete uterine rupture

INTRODUCTION

Complete uterine rupture, a rare peripartum complication, is often associated with a catastrophic outcome for both mother and child. However, few studies have investigated large datasets to evaluate maternal outcomes after complete ruptures, particularly in unscarred uteri. This paucity of studies is partly due to the rarity of both the event and the serious outcomes, such as peripartum hysterectomy and maternal death. The incidence of uterine rupture is expected to increase, due to increasing cesarean section rates worldwide. Thus, it is important to have more complete knowledge about the immediate maternal outcome following a complete uterine rupture. The objective was to identify maternal outcomes and their risk factors following complete uterine ruptures.

MATERIAL AND METHODS

This was a population-based study using data from the Medical Birth Registry of Norway, the Patient Administration System and medical records. Maternities with complete uterine rupture after start of labor in Norway during 1967-2008 (n = 247 births), identified among 2 209 506 women. Uterine ruptures were identified from both registries and were further studied through a review of medical records. Only complete ruptures were included in analysis. The associations between maternal outcomes and demographic and labor risk factors were estimated. Odds ratios (ORs) were determined with crude logistic regressions for each risk factor. Separate multivariable logistic regressions were performed to calculate adjusted odds ratios and 95% confidence intervals (CIs).

RESULTS

We identified 88 (35.6%) healthy mothers, 107 (43.3%) severe postpartum hemorrhages without hysterectomy, 51 (20.6%) peripartum hysterectomies, and three (1.2%) maternal deaths. Peripartum hysterectomy decreased significantly in the last years of study. Unscarred uterine ruptures significantly increased the risk of peripartum hysterectomy compared with scarred uterine ruptures (AOR 2.6, 95% CI 1.3-5.3). Other factors that increased the risk of peripartum hysterectomy following rupture were: maternal age ≥35 years (AOR 2.3, 95% CI 1.1-5.0), parity ≥3 vs parity 1-2 (AOR 2.8, 95% CI 1.2-6.7), and rupture detection after vaginal delivery (AOR 2.2, 95% CI 1.1-4.8).

CONCLUSIONS

Unscarred uteri, older maternal age, parity ≥3, and rupture detection after vaginal delivery showed the highest associations with the risk of peripartum hysterectomy after complete uterine rupture.

Rupture of the scarred and unscarred gravid uterus: Outcomes and risk factors analysis

OBJECTIVE

To study the maternal and fetal outcomes and assess the risk factors in patients with rupture at the lower-segment or non-lower-segment scarred, or unscarred gravid uterus.

MATERIALS AND METHODS

Gravid patients with uterine rupture were retrospectively collected in Chang-Gung Memorial Hospital from November 2004 to July 2017. The rupture timing and location in association with maternal and fetal outcomes were collected as well as the possible risk factors including surgical history and interval prior to conception were analyzed.

RESULTS

Thirty patients were included [mean age (±SEM), 34.4 ± 0.7 years; mean body mass index, 25.0 ± 0.6 kg/m²] with mean onset of rupture at 34.2 ± 0.9 weeks, in which, 12 occurred at term and 18 at preterm (range 20-34 weeks). Four fetal demises, 22 transferals to neonatal intensive care unit, and 17 maternal blood transfusions without maternal mortality were noted. Twenty-two patients presented with acute abdominal pain and/or abnormal fetal heart rate tracing were managed with emergent cesarean delivery. Four ruptures were found in postpartum of vaginal delivery, in which 3 were after trials of labor after cesarean delivery and 1 was unscarred uterus, and two of the four eventually underwent hysterectomy. Unscarred uterus (n = 6) without identifiable risk factor ruptured in significantly later gestation associated with higher fetal birthweights than those of the scarred uterus (n = 24) (both p < 0.05), both of which yielded morbidity. The rupture timing between patients of non-lower-segment scar (n = 14) and lower-segment scar (n = 10) were not significantly different.

CONCLUSION

Rupture of gravid uterus prevalently occurred after 30 weeks of gestation with remarkable morbidity. Unscarred uterus could rupture in later gestation than the scarred ones without identifiable risk factor. Alertness to the acute abdominal pain, atypical from uterine contraction or the suspicious fetal heart rate tracing is the key to the timely rescue and successful management.

Determinants of uterine rupture among cases of Adama city public and private hospitals, Oromia, Ethiopia: a case control study

BACKGROUND

Ethiopia is among the ten world countries with highest maternal death rates that accounts for more than 59% of global maternal deaths. Uterine rupture is one of the dangerous obstetric problems with high potential of causing maternal and neonatal morbidity and mortality. The case fatality rate of uterine rupture is high and hence identifying factors associated with uterine rupture remains important to guide decision makers and practitioners. The study aimed to identify factors associated with uterine rupture among clients managed in Adama city public and private hospitals during January 2011 to December, 2015.

METHODS

Unmatched case control study design was employed. The sample size was determined using computer software considering the basic statistical assumptions and accordingly a total of 432 women, (144 with uterine rupture as cases and 288 with spontaneous vaginal delivery as controls) managed in all hospitals during the study period were included in the study. A data collection tool that contains available variables was designed and used to extract data from log books and client cards. Data were entered into EPI-Info-7 and exported to Stata-12 for cleaning and analysis. The study participants were characterized using descriptive statistics. The associations between uterine rupture and independent variables were modeled using binary logistic regression analysis. The association between independent variables and uterine rupture was estimated using odds ratio with 95% confidence intervals. The statistical significance of the association was declared at P-value < 0.05.

RESULTS

The odds of having a uterine rupture were found to be more than six times higher among rural residents (AOR = 6.29; 95% CI: 3.39, 11.66) compared to urban. Other independent predictors include gravidity of five or more (AOR = 27.89; 95% CI: 8.42, 92.34), having a history of cesarean section scar (AOR = 9.94; 95% CI: 3.39, 11.66) and not having an antenatal care visit (AOR = 9.64; 95% CI: 4.37, 21.29).

CONCLUSION

Rural residence, multigravidas, cesarean section scar and not having an antenatal care visit were independent predictors of uterine rupture in the current study. Therefore, improving access and strengthening essential obstetric care, antenatal and family planning services with complete packages are crucial interventions in the reduction of the odds of having uterine rupture. In addition, the strengthening of the referral system is mandatory for women residing in rural areas.

Obstetric emergencies as antecedents to neonatal hypoxic ischemic encephalopathy, does parity matter?

INTRODUCTION

Our aim was to investigate the risk of moderate to severe hypoxic ischemic encephalopathy (HIE) by obstetric emergencies, with focus on the distribution of obstetric emergencies by parity, taking the history of a previous cesarean into account.

MATERIAL AND METHODS

Population-based cohort study of 692 428 live births at ≥ 36 weeks of gestation in Sweden, 2009-2015. Data were retrieved by linking the Swedish Medical Birth Register with the Swedish Neonatal Quality Register. Therapeutic hypothermia served as surrogate for moderate to severe HIE. Logistic regression analysis was used to estimate associations between HIE and placental abruption, eclampsia, cord prolapse, uterine rupture, and shoulder dystocia, presented as adjusted odds ratios (aORs) with 95% CI.

RESULTS

An obstetric emergency occurred in 133/464 (29%) of all HIE cases, more commonly in the parous (overall 37%; 48% with and 31% without a previous cesarean) than in the nulliparous (21%). Among nulliparas, shoulder dystocia was the most common obstetric emergency with the strongest association with HIE (aOR 48.2; 95% CI 28.2-82.6). In parous women without a previous cesarean, shoulder dystocia was most common, but placental abruption had the strongest association with HIE. Among parous women with a previous cesarean, uterine rupture was the most prevalent obstetric emergency with the strongest association with HIE (aOR 45.6; 95% CI 24.5-84.6).

CONCLUSIONS

Obstetric emergencies are common among cases of moderate to severe HIE. The strong association with shoulder dystocia in nullipara, and with uterine rupture in women with previous cesarean deliveries, implies an opportunity for reducing the incidence of HIE.

Infant outcome after complete uterine rupture

BACKGROUND

Complete uterine rupture is a rare peripartum complication often associated with a catastrophic outcome for both mother and child. However, little has been written based on large data sets about maternal and infant outcome after complete ruptures. This is partly due to the rarity of the event and the serious maternal and infant outcome; it is also partly due to the use of international diagnostic codes that do not differentiate between the less catastrophic partial rupture and more catastrophic complete uterine rupture. As uterine rupture is expected to increase due to increased cesarean delivery rates worldwide, it is important to know more completely about the outcome following complete uterine rupture.

OBJECTIVE

We sought to explore risk factors associated with poor infant outcome in cases of complete uterine rupture.

STUDY DESIGN

This population-based study used data from the Medical Birth Registry of Norway, the Patient Administration System, and medical records. We included births with complete uterine rupture after start of labor in all maternity units in Norway during the period 1967 through 2008 (n = 244 births), identified among 2,455,797 births. Uterine ruptures were identified and further studied through a review of medical records. We estimated the associations between infant outcomes and demographic and labor risk factors using logistic regression analyses. Odds ratios with 95% confidence intervals for each risk factor were determined after adjustment for demographic factors and period of birth. The main outcome measure was infant outcome: healthy infant, intrapartum/infant deaths, hypoxic ischemic encephalopathy, and admission to the neonatal intensive care unit.

RESULTS

We identified 109 (44.7%) healthy infants, 56 (23.0%) infants needing neonatal intensive care unit admission, 64 (26.2%) intrapartum/infant deaths, and 15 (6.1%) infants with hypoxic ischemic encephalopathy. The highest number of intrapartum/infant deaths occurred in 1967 through 1977 (51.6%) and the fewest in 2000 through 2008 (15.0%). Unscarred uterine ruptures did not significantly increase intrapartum/infant deaths compared to scarred uterine ruptures. Placental separation and/or fetal extrusion had the highest odds ratio for intrapartum/infant deaths (odds ratio, 17.9; 95% confidence interval, 7.5-42.4). Time-to-delivery interval <20 minutes resulted in fewest intrapartum/infant deaths (9.9%), although there were 2 deaths at 10-minute interval. Time to delivery >30 minutes vs <20 minutes increased risk of death (odds ratio, 16.7; 95% confidence interval, 6.4-43.5).

CONCLUSION

Intrapartum/infant death after complete uterine rupture decreased significantly over the decades. Time to delivery >30 minutes and placental separation and/or fetal extrusion had the highest association with intrapartum/infant deaths after complete uterine rupture. Time to delivery <20 minutes limited the incidence of intrapartum/infant deaths.

Associated Factors and Outcome of Uterine Rupture at Suhul General Hospital, Shire Town, North West Tigray, Ethiopia 2016: A Case-Control Study

Background

Uterine rupture is tearing of the uterine wall during pregnancy or delivery. It may extend to partial or whole thickness of the uterine wall. It is usually a case where obstetric care is poor. In extensive damage, death of the baby and sometimes even maternal death are evident.

Objective

This study assesses associated factors and outcome of uterine rupture at Suhul General Hospital, Tigray Region, Ethiopia, 2016.

Methodology

A case-control study was conducted by review of data from September 2012 to August 2016. A total of 336 samples were studied after calculating by EPI-INFO using proportion of multiparity (53%) and ratio of 1 : 2 for cases and controls, respectively. Analysis was done using SPSS version 20. Bivariate and multivariate logistic regression was applied with p < 0.05.

Result

ANC, grand multiparity, malpresentation, and obstructed labor had association, but previous cesarean delivery was not significant. Perinatal mortality was 105 (93%) versus 13 (5.8%) in cases and controls, respectively. Anemia was highest for both groups (53.7% versus 32.1%).

Conclusion

Majority of uterine rupture is attributed to prolonged or obstructed labor. Cases of uterine rupture had prompt management preventing maternal mortality, but burden of perinatal death is still high.

Risk factors and symptoms associated with maternal and neonatal complications in women with uterine rupture. A 16 years multicentric experience

OBJECTIVE

high maternal and fetal morbidity and mortality levels have been associated with uterine ruptures. The aims of our study were to determine risk factors and signs for maternal and fetal complications in patients with uterine rupture.

STUDY DESIGN

retrospective, population-based study, in all Val d'Oise public obstetrics departments, France, between 2000 and 2015. All patients with uterine rupture were analyzed using medical records. To identify risk factors and signs for maternal and fetal complications, patients were divided into two groups according to adverse maternal and fetal outcomes or not, and compared.

RESULTS

During the study period, 126 patients with complete uterine rupture were identified. In all, 74 (58.7%) had maternal and fetal complications, and these were more frequently observed in patients with unscarred uterus (N=18; p<0.001 and OR 5.52, 95% CI 2.09-14.55), lateral injured uterus (N=21; p<0.001), after labour induction (N=21, p=0.01 and OR 3.69, 95% CI 1.22-13.53), and when a sudden onset of abdominal pain, in patients with previous successful epidural analgesia, occurred (75.9% vs 39.2%, p<0.001 and OR 4.88, 95% CI 1.9-12.13).

CONCLUSION

Unscarred and lateral ruptures of uterus were associated with maternal vascular injuries, and higher maternal and fetal complications. Sudden onset of abdominal pain in woman with previous successful epidural analgesia might be predictive of complicated uterine rupture.