Placenta Accreta Research Articles

Atypical presentation of placenta accreta spectrum: a case series of spontaneous hemoperitoneum in the third trimester

Atypical presentation of placenta accreta spectrum: a case series of spontaneous hemoperitoneum in the third trimester

Understanding and Managing a Patient With Placenta Accreta Spectrum Disorder

Understanding and Managing a Patient With Placenta Accreta Spectrum Disorder

Longitudinal Parallel Compression Suture To Control PPH Due to Placenta Previa & Accreta.

Objective: To determine the efficacy and safety of longitudinal parallel compression sutures to control postpartum haemorrhage (PPH) in placenta previa/accreta patients. Methodology: This cross-sectional study was conducted at Department of obstetrics and gynaecology, Peoples University of Medical & Health Sciences for Women; Nawab shah for a period of six months from 7th June 2023 to 6th Dec 2023, after getting approval from ERB of People University of Medical & Health Science. Sample size achieved through non-probability consecutive sampling. Women fulfilling inclusion criteria were selected from the operation theatre of Obstetrics & Gynaecology, PUMHS Nawabshah. To control life threatening PPH owing to placenta previa (with or without accreta) during caesarean section, longitudinal parallel compression sutures in operating room. Outcome variables observed includes amount of blood loss, number of days stayed in the hospital, need for concurrent procedure, need of hysterectomy, and maternal death. Data was entered and analysed on SPSS 25. Results: The stitch was applied in 31 patients. The technique was effective, and successful as a single procedure in 11 patients (35.43%). 6 patients (19%) needed additional tamponade; 12 patients (38%) also received concurrent uterine artery ligation while 2 needed ovarian artery ligation. Despite concurrent procedure 3 patients ended up for hysterectomy (9.1%). The most common indication of caesarean section was placenta previa (51%), mostly done at a gestational age of 37 weeks ± 1.84 standard deviation. Mean age of the patient was 29 years. Estimated blood loss was more than 1.5 litre as seen in 22.6% of the patients and 71.6% patients need blood transfusion. Uterine atony was a common cause of PPH (51%). 51.6% of patients discharged within 3 days of surgery. Two patients expired. Conclusion: The innovative suture techniques have shown promise in improving surgical outcomes in resource-constrained environments, especially in developing countries. This effectiveness can help bridge the gap between limited resources and the need for quality surgical care. Key words: PPH, Uterine Compression Suture, Placenta Previa, Placenta Accreta.

MRI Assessed Placental Location as a Diagnostic Tool of Placental Invasiveness and Maternal Peripartum Morbidity.

Placenta accreta spectrum (PAS) disorder is one of the leading causes of peripartum maternal morbidity and mortality; its early identification during pregnancy is of utmost importance to ensure the optimal clinical outcome. The aim of the present study is to investigate the possible association of the presence and type/location of placenta previa on MRI with PAS and maternal peripartum outcome. One hundred eighty-nine pregnant women (mean age: 35 years; mean gestational age: 32 weeks) at high risk for PAS underwent a dedicated placental MRI. All women underwent a C-section within 6 weeks from the MRI. All MRIs were evaluated by two experienced genitourinary radiologists for presence, type (complete/partial vs. marginal/low lying), and location (anterior vs. anterior-posterior vs. posterior) of placenta previa. Statistical analysis was performed for possible association of type/location of previa with placental invasiveness and peripartum outcomes. Intraoperative information was used as a reference standard. Complete/partial previa was detected in 143/189 (75.6%) and marginal/low lying previa in 33/189 (17.5%) women; in 88/189 (46.6%) women, the placenta had anterior-posterior, in 54/189 (28.6%) anterior and in 41/189 (21.7%) posterior. Complete/partial previa had an at least 3-fold probability of invasiveness and was more frequently associated with unfavorable peripartum events, including massive intraoperative blood loss or hysterectomy, compared to low-lying/marginal placenta. Posterior placental location was significantly associated with lower rates of PAS and better clinical outcomes. In conclusion, the type and location of placenta previa shown with MRI seems to be associated with severity of complications during delivery and should be carefully studied.

Association between adenomyosis and placenta accreta and mediation effect of assisted reproductive technology on the association: A nationwide observational study.

To investigate the association between adenomyosis and placenta accreta spectrum (PAS) and to evaluate the effect of assisted reproductive technology (ART) in mediating this association. We retrieved data for singleton women from the Japanese nationwide perinatal registry between 2013 and 2019, excluding women with a history of adenomyomectomy. To investigate the association between adenomyosis and PAS among women, we used a multivariable logistic regression model with multiple imputation for missing data. We evaluated mediation effect of ART including invitro fertilization and intracytoplasmic sperm injection on the association between adenomyosis and PAS using causal mediation analysis based on the counterfactual approach. Of 1 500 173 pregnant women, 1539 (0.10%) had adenomyosis. The number receiving ART was 489/1539 (31.8%) and 117 482/1 498 634 (7.8%) in women with and without adenomyosis, respectively. The proportion of women who developed PAS was 21/1539 (1.4%) in women with adenomyosis and 7530/1 498 634 (0.5%) in women without adenomyosis. Adenomyosis was significantly associated with PAS (odds ratio [OR] 1.95; 95% confidence interval [CI] 1.26-3.00; P = 0.002). Mediation analysis showed that OR of the total effect of adenomyosis on PAS was 1.98 (95% CI 1.13-3.04), OR of natural indirect effect (effect explained by ART) was 1.15 (95% CI 1.01-1.41), and OR of natural direct effect (effect unexplained by ART) was 1.72 (95% CI 0.86-2.82). The proportion mediated (natural indirect effect/total effect) was 26.5%. Adenomyosis was also significantly associated with PAS without previa (OR 1.96; 95% CI 1.23-3.13, P = 0.005). Adenomyosis was significantly associated with PAS. ART mediated 26.5% of the association between adenomyosis and PAS.

Prophylactic occlusion balloons of both internal iliac arteries in caesarean hysterectomy for placenta accreta spectrum disorder reduces blood loss: A retrospective comparative study

BackgroundThe placenta accreta spectrum is a complex disorder characterized by abnormal invasion of the placenta into the uterine wall, posing a significant risk of life-threatening haemorrhage for patients. Its incidence is on the rise, largely attributed to the increasing rates of caesarean sections. Management of this spectrum involves a multidisciplinary approach, although standardized protocols are not yet established. While caesarean hysterectomy remains the standard Gold, several adjunctive treatments have emerged in recent years to mitigate bleeding risk and associated morbidity. Among these, prophylactic occlusion balloons placed in the internal iliac arteries have shown promise. The aim of our study is to demonstrate the effect of prophylactic occlusion balloons in both uterine iliac arteries in the management of placental accreta spectrum disorders. MethodsA retrospective monocentric cohort study was conducted in the Department "C" of Gynaecology and Obstetrics at the Maternity Center of Tunis. The study spanned three years, from January 2nd, 2020, to December 31st, 2022. The study population consisted of two groups: Control Group (CG) comprised patients who underwent caesarean hysterectomy without internal-iliac prophylactic occlusion balloons, and Occlusion balloons of both internal iliac arteries Group (OBIIAG) included patients who underwent caesarean hysterectomy with internal-iliac prophylactic occlusion balloons. ResultsA total of 38 patients were included in the study, all of whom exhibited similar epidemiological characteristics and comparable personal and obstetric histories. The most prevalent risk factor among the patients was a history of caesarean section (92%). On average, patients were diagnosed at 30 weeks of gestation, with third-trimester bleeding being the most common presentation (71% of cases). The median gestational age at delivery was between 36 and 37 weeks. We observed a significant difference in blood loss between the two groups (2888 ml in the control group and 1828 ml in the group with internal-iliac prophylactic occlusion balloons, p < 0.05). Implementation of this technique resulted in a reduced need for massive transfusions (p < 0.01) and shorter operating times (126 min for the control group and 92 min for the group with internal-iliac prophylactic occlusion balloons; p = 0.04). There were no significant differences in morbidity between the two groups. ConclusionThe intra-iliac prophylactic occlusion balloons can help reduce the risk of hemorrhage and the morbidities that come with the placenta accreta spectrum disorder.

Risk Factors for Postpartum Hemorrhage in Severe Pre-Eclampsia: A Retrospective Single-Centre Study of 1953 Cases.

BACKGROUND Severe pre-eclampsia (sPE) and postpartum hemorrhage (PPH) in pregnancy have serious impact on maternal and fetal health and life. Co-occurrence of sPE and PPH often leads to poor pregnancy outcomes. We explored risk factors associated with PPH in women with sPE. MATERIAL AND METHODS This retrospective study included 1953 women with sPE who delivered at the Women's Hospital of Nanjing Medical University between April 2015 and April 2023. Risk factors for developing PPH in sPE were analyzed, and subgroups were analyzed by delivery mode (cesarean and vaginal). RESULTS A total of 197 women with PPH and 1756 women without PPH were included. Binary logistic regression results showed twin pregnancy (P<0.001), placenta accreta spectrum disorders (P=0.045), and placenta previa (P<0.001) were independent risk factors for PPH in women with sPE. Subgroup analysis showed risk factors for PPH in cesarean delivery group were the same as in the total population, but vaginal delivery did not reduce risk of PPH. Spinal anesthesia reduced risk of PPH relative to general anesthesia (P=0.034). Vaginal delivery group had no independent risk factors for PPH; however, magnesium sulfate (P=0.041) reduced PPH incidence. CONCLUSIONS Women with twin pregnancy, placenta accreta spectrum disorders, placenta previa, and assisted reproduction with sPE should be alerted to the risk of PPH, and spinal anesthesia should be preferred in cesarean delivery. Magnesium sulfate should be used aggressively in women with sPE; however, the relationship between magnesium sulfate and PPH risk needs further investigation.

Does Near Miss Compromise Sexual Function in Reproductive-Aged Women? A Comparative Cross-Sectional Study in Ahvaz, Iran

Background: Maternal near miss (MNM) is defined as any life-threatening event during pregnancy, delivery, or within six weeks after the termination of pregnancy. Objectives: This cross-sectional study aimed to assess sexual function in women with (n = 140) and without MNM (n = 246). Methods: Eligible participants were women with MNM and basic literacy who had given birth at least 8 - 12 weeks prior to the study. Participants were recruited from Imam Khomeini and Taleghani hospitals, while women without MNM were recruited from two public health centers in Ahvaz. Data collection commenced in December 2020 and concluded in March 2021. A demographic questionnaire and the Female Sexual Function Index were used to collect the data. Data were analyzed using independent t-tests, chi-square tests, and multiple linear regression. Results: The predominant mode of delivery among MNM women was cesarean section (70%, P &lt; 0.05). The most common causes of MNM were preeclampsia (41.43%) and placenta accreta (24.29%), followed by hypertension and diabetes (17.86%). Women without MNM reported significantly higher scores in sexual satisfaction (β = 0.355, 95% CI: 0.019, 0.690, P = 0.035), lubrication (β = 0.707, 95% CI: 0.435, 0.980, P &lt; 0.0001), sexual arousal (β = 0.394, 95% CI: 0.116, 0.522, P = 0.007), sexual desire (β = 0.319, 95% CI: 0.116, 0.522, p = 0.002), and total sexual function score (β = 1.768, 95% CI: 0.306, 3.230, P = 0.018). Women who had undergone cesarean section reported lower scores in sexual satisfaction (β = -0.646, 95% CI: -0.983, -0.309, P &lt; 0.0001), orgasm (β = -0.620, 95% CI: -0.965, -0.275, P &lt; 0.0001), sexual arousal (β = -0.473, 95% CI: 0.159, 0.439, P = 0.001), and total sexual function score (β = -3.181, 95% CI: -4.655, -1.707, P &lt; 0.0001). Older women scored significantly lower in all components of sexual function except for pain. Conclusions: The study results indicated that all components of sexual function, except pain, were lower in women with MNM. A significantly higher number of women who had undergone cesarean section experienced MNM and sexual dysfunction. Health policymakers should focus not only on the causes of MNM, particularly cesarean sections, but also on assessing the sexual function of women affected by MNM.

Risk Scoring System with MRI for Intraoperative Massive Hemorrhage in Placenta Previa and Accreta in Fayoum university hospital

Risk Scoring System with MRI for Intraoperative Massive Hemorrhage in Placenta Previa and Accreta in Fayoum university hospital

Association between Antenatal Vaginal Bleeding and Adverse Perinatal Outcomes in Placenta Accreta Spectrum.

Background and Objectives: Placenta accreta spectrum (PAS) disorders are placental conditions associated with significant maternal morbidity and mortality. While antenatal vaginal bleeding in the setting of PAS is common, the implications of this on overall outcomes remain unknown. Our primary objective was to identify the implications of antenatal vaginal bleeding in the setting of suspected PAS on both maternal and fetal outcomes. Materials and Methods: We performed a case-control study of patients referred to our PAS center of excellence delivered by cesarean hysterectomy from 2012 to 2022. Subsequently, antenatal vaginal bleeding episodes were quantified, and components of maternal morbidity were assessed. A maternal composite of surgical morbidity was utilized, comprised of blood loss ≥ 2 L, transfusion ≥ 4 units of blood, intensive care unit (ICU) admission, and post-operative length of stay ≥ 4 days. Results: During the time period, 135 cases of confirmed PAS were managed by cesarean hysterectomy. A total of 61/135 (45.2%) had at least one episode of bleeding antenatally, and 36 (59%) of these had two or more bleeding episodes. Increasing episodes of antenatal vaginal bleeding were associated with emergent delivery (p < 0.01), delivery at an earlier gestational age (35 vs. 34 vs. 33 weeks, p < 0.01), and increased composite maternal morbidity (76, 84, and 94%, p = 0.03). Conclusions: Antenatal vaginal bleeding in the setting of PAS is associated with increased emergent deliveries, earlier gestational ages, and maternal composite morbidity. This important antenatal event may aid in not only counseling patients but also in the coordination of multidisciplinary teams caring for these complex patients.

Placenta accreta spectrum disorders: A retrospective continuous audit of clinical outcomes of 82 cases over 18 years in a large outer London associated teaching hospital

AbstractObjectiveTo analyse and describe the clinical outcomes for the women with placenta accreta spectrum (PAS) disorders managed in our Trust over the last 18 years.DesignHospital‐based retrospective continuous audit.SettingContinuous audit of the women diagnosed with PAS between 2005 and 2023.PopulationLarge outer London teaching hospital.MethodsAll women with low‐lying placenta on a previous caesarean scar were screened during their anomaly scan. Those with suspected PAS were referred to foetal medicine and once confirmed, managed using a multidisciplinary team approach.Main Outcome MeasuresTime of diagnosis, risk factors, timing of and gestation at delivery, type of surgical procedure, length of stay, intensive therapy unit admission, blood transfusion requirements, use of cell salvage, haemostatic techniques, histology, in‐utero transfer rate, need for emergency delivery and complications.ResultsOf the 82 women, 61% were nonwhite and 76% overweight or obese. Thirty‐four percent occurred in women with one previous caesarean. The number managed each year increased, with 39% occurring since 2018. Twenty‐two percent were transferred from other Trusts. Eighty‐four percent delivered &gt;32 weeks gestation with only two women delivering live births &lt;28 weeks. Eighty‐three percent delivered by planned caesarean. Complication rates were low overall, haemorrhage &gt;3 L occurred in 35%. Since 2018, 72% had excision and these cases had better surgical outcomes and fewer complications.ConclusionsOur data demonstrates that our cohort of women are a high‐risk population but despite this, our results are favourable and demonstrate a move to excision surgery with associated reduced morbidity, low rate of complications, a short hospital stay and very low rates of extremely premature deliveries.

Evaluation of first-trimester complete blood count inflammatory indices in placenta previa

Aim: To evaluate systemic inflammation in pregnant women diagnosed with placenta previa (PP). First-trimester complete blood count indices of PP patients were assessed. Materials and Method: This cross-sectional study was conducted with 346 singleton pregnant women, including 115 PP cases (study group) and 231 healthy pregnant women (control group) who were operated on in a tertiary center for one year. The study group was then divided into two subgroups. Those who underwent peripartum hysterectomy due to placenta accreta spectrum (PAS) were determined as PAS-positive, and those without invasion were PAS-negative. Demographic and obstetric characteristics laboratory results were recorded retrospectively. Systemic immune-inflammation index (SII) and systemic inflammatory response index (SIRI) values were calculated. Data were presented as mean and standard deviation using the independent sample t-test. Results: The mean value of maternal age, body mass index, and gestational weeks at which hemograms were evaluated were similar between the study and control groups. While white blood cell and neutrophil counts were significantly higher in the PP group, red blood cell and hemoglobin counts were lower (p

The relationship between cervical length and area measurements evaluated by MRI and the amount of hemorrhage in PAS cases

BackgroundPlacenta accreta spectrum often leads to massive hemorrhage and even maternal shock and death. This study aims to identify whether cervical length and cervical area measured by magnetic resonance imaging correlate with massive hemorrhage in patients with placenta accreta spectrum.MethodsThe study was conducted at our hospital, and 158 placenta previa patients with placenta accreta spectrum underwent preoperative magnetic resonance imaging examination were included. The cervical length and cervical area were measured and evaluated their ability to identify massive hemorrhage in patients with placenta accreta spectrum.ResultsThe cervical length and area in patients with massive hemorrhage were both significantly smaller than those in patients without massive hemorrhage. The results of multivariate analysis show that cervical length and cervical area were significantly associated with massive hemorrhage. In all patients, a negative linear was found between cervical length and amount of blood loss (r =−0.613), and between cervical area and amount of blood loss (r =−0.629). Combined with cervical length and cervical area, the sensitivity, specificity, and the area under the curve for the predictive massive hemorrhage were 88.618%, 90.209%, and 0.890, respectively.ConclusionThe cervical length and area might be used to recognize massive hemorrhage in placenta previa patients with placenta accreta spectrum.

The predictive value of conventional magnetic resonance imaging combined with intravoxel incoherent motion parameters for evaluating maternal and neonatal clinical outcomes in patients with placenta accreta spectrum disorders

IntroductionWe aimed to identify factors predictive of adverse maternal and neonatal outcomes in patients with placenta accreta spectrum (PAS) disorders using magnetic resonance imaging (MRI) and intravoxel incoherent motion (IVIM) parameters. MethodFifty-six normal singleton pregnancies at 33–39 weeks of gestation underwent MRI examination at 1.5 T. The IVIM parameters were obtained from the placenta. The correlation between the f value and postpartum hemorrhage (PPH) and between the f value and transfused units of red blood cells (RBCs) was estimated by linear regression. The correlation between various influencing factors (clinical risk factors, MRI features, and IVIM parameters) and poor outcomes was investigated using univariate and multivariate analyses. ResultThe interobserver agreement ranged from fair to excellent (k = 0.30–0.88). Multivariate analyses showed that previous cesarean sections, low signal intensity bands on T2WI and the D value were independent risk factors for adverse outcomes. The combination of three risk factors demonstrated the highest AUC of 0.903, with a sensitivity and specificity of 73.10 % and 96.90 %, respectively. Last, f was positively correlated with PPH and units of RBCs transfused. DiscussionPreoperative MRI features and IVIM parameters may be used to predict poor outcomes in patients with invasive placental disorders like PAS.

Risk factors for placenta accreta spectrum without prior cesarean section: A case-control study in China.

To identify the risk factors for placenta accreta spectrum (PAS) disorders in women without prior cesarean section (CS). This retrospective case-control study investigated patients without prior CS who gave birth at Peking University Third Hospital between January 1, 2015 and December 31, 2021. Patients diagnosed with PAS according to the clinical diagnostic criteria of the 2019 International Federation of Gynecology and Obstetrics (FIGO) classification were included as the study group. Patients were matched as the control group according to delivery date and placenta previa, in a 1:2 allocation ratio. Maternal characteristics were compared between the two groups. The study included 348 patients in the study group and 696 in the control group. The multivariate analysis showed that the independent risk factors of PAS consisted of operative hysteroscopy (once: adjusted odds ratio [aOR] 2.38, 95% CI 1.28-4.24, P = 0.006; twice or more: aOR 5.43, 95% CI 1.04-28.32, P = 0.045), uterine curettage (once: aOR 2.54, 95% CI 1.80-3.58, P < 0.001; twice: aOR 3.01, 95% CI 1.81-5.02, P < 0.001; three or more times: aOR 9.18, 95% CI 4.64-18.18, P < 0.001), multifetal pregnancy (aOR 5.64, 95% CI 3.01-10.57, P < 0.001), adenomyosis (aOR 2.77, 95% CI 1.23-6.22, P = 0.014), invitro fertilization (aOR 1.51, 95% CI 1.04-2.20, P = 0.030) and pre-eclampsia (aOR 2.72, 95% CI 1.36-5.45, P = 0.005), and the independent protective factor was being multiparous (aOR 0.37, 95% CI 0.25-0.54, P < 0.001). After controlling the effect of placenta previa, we found that patients with PAS without prior CS had unique maternal characteristics. Classification and quantification of the intrauterine surgeries they have undergone is essential for identifying high-risk patients. Early identification of high-risk groups by risk factors has the potential to improve the prognosis considerably.

Prognosis of subsequent pregnancy in uterine necrosis after uterine artery embolization.

In an 8-year period at two medical center, 138 patients underwent uterine artery embolization, and 11 of them were diagnosed with uterine necrosis. Among them, three were successfully conceived. However, one of them developed an arteriovenous malformation after an artificial abortion, and another experienced complications, including placenta previa and placenta accreta spectrum, which resulted in early preterm delivery and recurrent postpartum hemorrhage, necessitating subtotal hysterectomy. Therefore, it is crucial to prepare for potential adverse pregnancy outcomes in subsequent pregnancies for patients with a history of uterine necrosis.

Matrix Metalloproteinase-9 in the Etiopathogenesis of Placenta Accreta Spectrum: A Literature Review

Abstract The recent increase in placenta accreta spectrum has been correlated with a rise in the rate of cesarean sections. A recent study provides evidence that hampered wound healing results in cesarean scar defects that lead to a failure in the normal process of decidualization and deeper adherence of trophoblasts. Matrix metalloproteinase (MMP) is crucial in every step of wound healing as it alters the wound matrix, facilitating cell migration, as well as tissue remodeling. MMP-9 expression is higher in placental and decidual tissue in cases of placenta accreta. Based on these findings, assessment of MMP-9 expression can shed new light on the etiopathology of placenta accreta spectrum disorder and can be a potential diagnostic marker.

Placenta accreta outcomes and risk factors in a referral hospital in north of Iran: A case control study.

Placenta accreta syndrome (PAS) may led to heavy blood loss and maternal death. Here we analyzed the main risk factors of PAS+ pregnancies and its complications in a referral hospital in the north of Iran. In a case control study, all pregnant women with PAS referred to our department during 2016 till 2021 were enrolled and divided in two groups case (PAS+) and control (PAS-) based on preoperative imaging, intraoperative findings, and pathological reports. The sociodemographic features and neonatal-maternal outcomes also were recorded. The most frequent reason for cesarean (C/S) was repeated C/S (62.9%, 56/89). A significant difference showed up in the time lag between previous C/S and the present delivery (p < 0.001) which shows that when the time distance is longer, the risk of PAS rises (OR: 1.01 [95% CI: 1.003-1.017]). Also, a positive history of prior abortion and elective type of previous C/S were related to PAS+ pregnancies. Our other finding showed that PAS+ pregnancies will end in lower gestational age and have a longer duration of operation and hospitalization, heavy blood transfusion, and hysterectomy. Also, PAS+ pregnancies were not related to poor neonatal outcomes. It seems that, in addition to repeated C/S as a strong risk factor, previous abortion is a forgotten key which leads to incomplete evacuation or damage the endometrial-myometrial layers.

Mouse Surgical Model of Mechanical Uterine Injury and Subsequent Embryo Defects.

Uterine injury from procedures such as Cesarean sections (C-sections) often have severe consequences on subsequent pregnancies, leading to disorders such as uterine placenta previa, placenta accreta spectrum (PAS), and Cesarean scar pregnancy. With rates of C-section at ∼30% of deliveries in the US and projected to continue to climb, an understanding of the mechanisms by which these pregnancy disorders arise and opportunities for intervention are sorely needed. However, there are currently very few animal models of uterine injury and its subsequent impacts on maternal as well as in utero and postnatal fetal outcomes. Here, we describe a procedure for a novel model of surgically induced uterine injury in the genetically tractable laboratory mouse (Mus musculus). We describe preparatory steps for surgery, the induction of uterine injury itself, and post-surgical recovery. We then provide supporting information regarding downstream dissection of pregnant mice. Lastly, we include additional information regarding estrous cycle staging in order to perform surgeries and dissections at the relevant phase in non-pregnant mice. This procedure for incurring uterine injury in a mouse model presents an important step forward in understanding uterine damage and its associated pregnancy disorders. © 2024 Wiley Periodicals LLC. Basic Protocol 1: Preparation for surgery Basic Protocol 2: Surgery and induction of uterine injury Basic Protocol 3: Mating and dissection of pregnant mice as endpoint analyses Support Protocol: Estrous staging of animals.

Efficacy and safety of prophylactic balloon occlusion in the management of placenta accreta spectrum disorder: a retrospective cohort study

ObjectivePlacenta accreta spectrum disorder (PAS) is a serious obstetric complication associated with significant maternal morbidity and mortality. Prophylactic balloon occlusion (PBO), as an intravascular interventional therapies, has emerged as a potential management strategy for controlling massive hemorrhage in patients with PAS. However, current evidence about the clinical application of PBO in PAS patients are still controversial. This study aimed to evaluate the effectiveness and safety of PBO in the management of PAS.MethodsA retrospective cohort study including PAS patients underwent cesarean delivery was conducted in a tertiary hospital from January 2015 to March 2022. Included PAS patients were further divided into balloon and control groups by whether PBO was performed. Groups were compared for demographic characteristics, intraoperative and postoperative parameters, maternal and neonatal outcomes, PBO-related complication and follow up outcomes. Additionally, multivariate-logistic regression analysis was performed to determine the definitive associations between PBO and risk of massive hemorrhage and hysterectomy.ResultsA total of 285 PAS patients met the inclusion criteria were included, of which 57 PAS patients underwent PBO (PBO group) and 228 women performed cesarean section (CS) without PBO (control group). Irrespective of the differences of baseline characteristics between the two groups, PBO intervention did not reduce the blood loss, hysterectomy rate and postoperative hospital stay, but it prolonged the operation time and increased the cost of hospitalization (All P < 0.05) Additionally, there were no significant differences in postoperative complications, neonatal outcomes, and follow-up outcomes(All P > 0.05). In particular, patients undergoing PBO were more likely to develop the venous thrombosis postoperatively (P = 0.001). However, multivariate logistic regression analysis showed that PBO significantly decreased the risk of massive hemorrhage (OR 0.289, 95%CI:0.109–0.766, P = 0.013). The grade of PAS and MRI with S2 invasion were the significant risk factors affecting massive hemorrhage(OR:6.232 and OR:5.380, P<0.001).ConclusionPBO has the potential to reduce massive hemorrhage in PAS patients undergoing CS. Obstetricians should, however, be aware of potential complications arising from the PBO. Additionally, MRI with S2 invasion and PAS grade will be useful to identify PAS patients who at high risk and may benefit from PBO. In brief, PBO seem to be a promising alternative for management of PAS, yet well-designed randomized controlled trials are needed to convincingly demonstrate its benefits and triage the necessity of PBO.