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Bonsen LR, Sleijpen K, Hendriks J, Urlings TAJ, Dekkers OM, le Cessie S, van de Velde M, Gurung P, van den Akker T, van der Bom JG, Henriquez DDCA. Prophylactic Radiologic Interventions for Postpartum Hemorrhage Control in Women With Placenta Accreta Spectrum Disorder: A Systematic Review and Meta-analysis. Obstet Gynecol 2024:00006250-990000000-01106. [PMID: 38954828 DOI: 10.1097/aog.0000000000005662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 05/23/2024] [Indexed: 07/04/2024]
Abstract
OBJECTIVE To quantify the association between prophylactic radiologic interventions and perioperative blood loss during cesarean delivery in women with placenta accreta spectrum disorder through a systematic review and network meta-analysis. DATA SOURCES On January 3, 2023, a literature search was conducted in PubMed, EMBASE, Cochrane Library, and Web of Science. We also checked ClinicalTrials.gov retrospectively. Prophylactic radiologic interventions to reduce bleeding during cesarean delivery involved preoperative placement of balloon catheters, distal (internal or common iliac arteries) or proximal (abdominal aorta), or sheaths (uterine arteries). The primary outcome was volume of blood loss; secondary outcomes were the number of red blood cell units transfused and adverse events. Studies including women who received an emergency cesarean delivery were excluded. METHODS OF STUDY SELECTION Two authors independently screened citations for relevance, extracted data, and assessed the risk of bias of individual studies with the Cochrane Risk of Bias in Non-randomized Studies of Interventions tool. TABULTATION, INTEGRATION, AND RESULTS From a total of 1,332 screened studies, 50 were included in the final analysis, comprising 5,962 women. These studies consisted of two randomized controlled trials and 48 observational studies. Thirty studies compared distal balloon occlusion with a control group, with a mean difference in blood loss of -406 mL (95% CI, -645 to -167). Fourteen studies compared proximal balloon occlusion with a control group, with a mean difference of -1,041 mL (95% CI, -1,371 to -710). Sensitivity analysis excluding studies with serious or critical risk of bias provided similar results. Five studies compared uterine artery embolization with a control group, all with serious or critical risk of bias; the mean difference was -936 mL (95% CI, -1,522 to -350). Reported information on adverse events was limited. CONCLUSION Although the predominance of observational studies in the included literature warrants caution in interpreting the findings of this meta-analysis, our findings suggest that prophylactic placement of balloon catheters or sheaths before planned cesarean delivery in women with placenta accreta spectrum disorder may, in some cases, substantially reduce perioperative blood loss. Further study is required to quantify the efficacy according to various severities of placenta accreta spectrum disorder and the associated safety of these radiologic interventions. SYSTEMATIC REVIEW REGISTRATION PROSPERO, CRD42022320922.
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Affiliation(s)
- Lisanne R Bonsen
- Departments of Obstetrics and Gynaecology, Clinical Epidemiology, Clinical Endocrinology, and Biomedical Data Sciences, Leiden University Medical Center, and Leiden University Libraries, Leiden University, Leiden, the Department of Radiology, Catharina Hospital, Eindhoven, the Department of Radiology, Haaglanden Medical Center, The Hague, and Athena Institute, VU University, Amsterdam, the Netherlands; and the Department of Cardiovascular Sciences, Section Anesthesiology, KU Leuven and UZ Leuven, Leuven, Belgium
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Chen D, Xu J, Tian Y, Ling Q, Peng B. Clinical evaluation of the effect for prophylactic balloon occlusion in pregnancies complicated with placenta accreta spectrum disorder: A systematic review and meta-analysis. Int J Gynaecol Obstet 2024. [PMID: 38899567 DOI: 10.1002/ijgo.15704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 04/02/2024] [Accepted: 04/14/2024] [Indexed: 06/21/2024]
Abstract
BACKGROUND Placenta accreta spectrum (PAS) disorder is a critical and severe obstetric condition associated with high risk of intraoperative massive hemorrhage and cesarean hysterectomy. Severe obstetric hemorrhage is currently one of the leading causes of maternal death worldwide. Prophylactic balloon occlusions, including prophylactic balloon occlusion of the abdominal aorta (PBOAA) and prophylactic balloon occlusion of the internal iliac arteries (PBOIIA), are the most common means of controlling hemorrhage in patients with PAS disorder, but their effectiveness is still debated. OBJECTIVE A systematic review and meta-analysis were conducted to evaluate the clinical effectiveness of prophylactic balloon occlusion during cesarean section (CS) in improving maternal outcomes for PAS patients. SEARCH STRATEGY MEDLINE, EMBASE, OVID, PubMed and the Cochrane Library were systematically searched from the inception dates to June 2022, using the keywords "placenta accreta spectrum disorder/morbidly adherent placenta (placenta previa, placenta accreta, placenta increta, placenta percreta), balloon occlusion, internal iliac arteries, abdominal aorta, hemorrhage, hysterectomy, estimated blood loss (EBL), packed red blood cells (PRBCs)" to identify the systematic reviews or meta-analyses. SELECTION CRITERIA All articles regarding PAS disorders and including the application of balloon occlusion were included in the screening. DATA COLLECTION AND ANALYSIS Two independent researchers performed the data extraction and assessed study quality. EBL volume and PRBC transfusion volume was regarded as the primary endpoints. Random and fixed effects models were used for the meta-analysis (RRs and 95% CIs), and the Newcastle-Ottawa Scale was used for quality assessments. MAIN RESULTS Of 429 studies identified, a total of 35 trials involving the application of balloon occlusion for patients with PAS disorder during CS were included. A total of 19 studies involving 935 patients who underwent PBOIIA were included in the PBOIIA group, and 851 patients were included in control 1 group. Ten studies including 428 patients with PAS who underwent PBOAA were allocated to the PBOAA group, and 324 patients without PBOAA were included in control 2 group. Simultaneously, we compared the effect on PBOAA and PBOIIA including seven studies, which referred to 267 cases in the PBOAA group and 313 cases in the PBOIIA group. The results showed that the PBOIIA group had a reduced EBL volume (MD: 342.06 mL, 95% CI: -509.90 to -174.23 mL, I2 = 77%, P < 0.0001) and PRBC volume (MD: -1.57 U, 95% CI: -2.49 to -0.66 U, I2 = 91%, P = 0.0008) than that in control 1 group. With regard to the EBL volume (MD: -926.42 mL, 95% CI: -1437.07 to -415.77 mL, I2 = 96%, P = 0.0004) and PRBC transfusion volume (MD: -2.42 U, 95% CI: -4.25 to -0.59 U, I2 = 99%, P = 0.009) we found significant differences between the PBOAA group and control 2 group. Prophylactic balloon occlusion (PBOAA and PBOIIA) had a significant effect on reducing intraoperative blood loss and blood transfusion volume in patients with PAS. Moreover, PBOAA was more effective than PBOIIA in reducing intraoperative blood loss (MD: -406.63 mL, 95% CI: -754.12 to -59.13 mL, I2 = 92%, P = 0.020), but no significant difference in controlling PRBCs (MD: -3.48 U, 95% CI: -8.90 to 1.95 U, I2 = 99%, P = 0.210) between the PBOIIA group and the PBOAA group. Hierarchical analysis was conducted by differentiating gestational weeks and maternal age to reduce the high heterogeneity of meta-analysis. Hierarchical analysis results demonstrated the heterogeneities of the study were reduced to some extent, and gestational weeks and maternal age might be the cause of increased heterogeneity. CONCLUSION Prophylactic balloon occlusion is a safe and effective method to control hemorrhage and reduce PRBC transfusion volume for patients with PAS, and PBOAA could reduce more intraoperative blood loss than PBOIIA. However, we found no statistical difference in lessening packed red blood cell transfusion volume for PAS patients. Hence, preoperative prophylactic balloon occlusion is the recommended application for PAS patients in obstetric CSs. Furthermore, PBOAA is preferred for controlling intraoperative bleeding in patients with corresponding medical conditions.
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Affiliation(s)
- Daijuan Chen
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu, Sichuan, China
| | - Jinfeng Xu
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu, Sichuan, China
- West China School of Medicine, Sichuan University, Chengdu, Sichuan, China
| | - Yuan Tian
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu, Sichuan, China
| | - Qiao Ling
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu, Sichuan, China
- West China School of Medicine, Sichuan University, Chengdu, Sichuan, China
| | - Bing Peng
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu, Sichuan, China
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Abouda SH, Aloui H, JAOUAD H, MARZOUK SB, Frikha H, Hammami R, Channoufi MB, Maghrebi H. Prophylactic occlusion balloons of both internal iliac arteries in caesarean hysterectomy for placenta accreta spectrum disorder reduces blood loss: A retrospective comparative study. Eur J Obstet Gynecol Reprod Biol X 2024; 22:100310. [PMID: 38736526 PMCID: PMC11087949 DOI: 10.1016/j.eurox.2024.100310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2024] [Revised: 04/12/2024] [Accepted: 04/25/2024] [Indexed: 05/14/2024] Open
Abstract
Background The 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. Methods A 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. Results A 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. Conclusion The intra-iliac prophylactic occlusion balloons can help reduce the risk of hemorrhage and the morbidities that come with the placenta accreta spectrum disorder.
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Affiliation(s)
- Saber Hassine Abouda
- Tunis Maternity and Neonatology Center/Department ‘C′of Gynecology and Obstetrics, Tunisia
| | - Haithem Aloui
- Tunis Maternity and Neonatology Center/Department ‘C′of Gynecology and Obstetrics, Tunisia
| | - Hadhami JAOUAD
- Tunis Maternity and Neonatology Center/Department ‘C′of Gynecology and Obstetrics, Tunisia
| | - Sofiene B. MARZOUK
- Tunis Maternity and Neonatology Center/Department of Anaesthesiology and Intensive Care, Tunisia
| | - Hatem Frikha
- Tunis Maternity and Neonatology Center/Department ‘C′of Gynecology and Obstetrics, Tunisia
| | - Rami Hammami
- Tunis Maternity and Neonatology Center/Department ‘C′of Gynecology and Obstetrics, Tunisia
| | | | - Hayen Maghrebi
- Tunis Maternity and Neonatology Center/Department of Anaesthesiology and Intensive Care, Tunisia
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Li Q, Zhang W, Hu C, Zhao Y, Pei C, Wu X, Fei K, Peng Q, Zhang J, Huang J. Termination of a second-trimester pregnancy with placenta accreta spectrum disorder. Libyan J Med 2023; 18:2258669. [PMID: 37722677 PMCID: PMC10512921 DOI: 10.1080/19932820.2023.2258669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 09/08/2023] [Indexed: 09/20/2023] Open
Abstract
Background: The termination of pregnancy in patients with placenta accreta spectrum disorder (PASD) during the second trimester remains uncertain. In addition, interventional radiology techniques, such as arterial embolization and balloon placement, are potential options. We evaluated the outcomes of pregnancy termination in patients with PASD during the second trimester and the effectiveness of preoperative interventional radiology techniques.Methods: This retrospective study analyzed 48 PASD patients who underwent pregnancy termination during the second trimester between January 2016 and May 2021.Results: Of the 48 patients, 20 (41.67%) underwent transvaginal termination, whereas 28 (58.33%) underwent cesarean section. Notably, no significant differences were observed in success rates between the transvaginal termination and cesarean section groups (80.00% vs. 92.86%, P = 0.38). Furthermore, no statistically significant differences were observed in the success rates (94.12% vs 90.32%, P = 1.00) and blood loss (512.35 ± 727.00 ml vs 804.00 ± 838.98 ml, P = 0.23) between the artery embolization and non-embolization groups. In the vaginal termination group, statistically significant differences were observed in gestational weeks (16.70 ± 3.12 vs 22.67 ± 3.63, P < 0.01) and blood loss (165.00 ± 274.43 ml vs 483.64 ± 333.53 ml, P = 0.04) between the (artery embolization and non-embolization) subgroups. Conversely, in the cesarean section group, no significant differences were observed in gestational weeks (23.59 ± 3.14 vs 23.20 ± 4.37, P = 0.79) and blood loss (811.11 ± 879.55 ml vs 989.47 ± 986.52 ml, P = 0.76) between the subgroups.Conclusions: Further studies are needed to evaluate the efficacy of vaginal termination in PASD patients during the second trimester. Regarding cesarean termination, arterial embolization did not demonstrate increased effectiveness.
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Affiliation(s)
- Qi Li
- Reproductive Medicine Center, Xiangya Hospital Central South University, Changsha, China
| | - Weishe Zhang
- Department of Obstetrics, Xiangya Hospital Central South University, Changsha, China
- Hunan Engineering Research Center of Early Life Development and Disease Prevention, Changsha, China
| | - Caihong Hu
- Department of Obstetrics, Xiangya Hospital Central South University, Changsha, China
| | - Yanhua Zhao
- Department of Obstetrics, Xiangya Hospital Central South University, Changsha, China
| | - Chenlin Pei
- Department of Obstetrics, Xiangya Hospital Central South University, Changsha, China
| | - Xinhua Wu
- Department of Obstetrics, Xiangya Hospital Central South University, Changsha, China
| | - Kuilin Fei
- Department of Obstetrics, Xiangya Hospital Central South University, Changsha, China
| | - Qiaozhen Peng
- Department of Obstetrics, Xiangya Hospital Central South University, Changsha, China
| | - Jiejie Zhang
- Department of Obstetrics, Xiangya Hospital Central South University, Changsha, China
- Hunan Engineering Research Center of Early Life Development and Disease Prevention, Changsha, China
| | - Jingrui Huang
- Department of Obstetrics, Xiangya Hospital Central South University, Changsha, China
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Zhao H, Wang Q, Han M, Xiao X. Current state of interventional procedures to treat pernicious placenta previa accompanied by placenta accreta spectrum: A review. Medicine (Baltimore) 2023; 102:e34770. [PMID: 37713901 PMCID: PMC10508584 DOI: 10.1097/md.0000000000034770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 07/25/2023] [Indexed: 09/17/2023] Open
Abstract
Pernicious placenta previa (PPP) accompanied by placenta accreta spectrum (PAS) is a life-threatening placental implantation that causes a variety of complications, including antepartum hemorrhage, postpartum hemorrhage, hemorrhagic shock, preterm birth, and neonatal asphyxia. Along with continuous improvements in medical technology, interventional procedures have been widely used to prevent intraoperative hemorrhage associated with PPP. The commonly used interventional procedures include abdominal aorta clamping, prophylactic balloon occlusion of the internal or common iliac arteries, and uterine artery embolization. The above-mentioned interventional procedures have their respective advantages and disadvantages. The best procedure for different situations continues to be debated considering the complex pattern of blood supply to the uterus in patients with PPP. The specific choice of interventional procedure depends on the clinical situation of the patient with PPP. For grade III PAS, the need for uterine artery embolization is assessed based on blood loss and preoperative hemostatic effect following abdominal aorta clamping. Repair or hysterectomy may be performed following uterine artery embolization if there is a hybrid operating room for grade III PAS patients with extensive sub-serosal penetration of the uterus and repair difficulty. For grade II PAS (shallow placental implantation), prophylactic balloon occlusion may not be necessary before surgery. Uterine artery embolization can be performed in case of postoperative hemorrhage.
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Affiliation(s)
- Hu Zhao
- Department of Gynecology and Obstetrics, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Qiong Wang
- Department of Obstetrics and Gynecology, Chengdu Women and Children’s Central Hospital, Chengdu, China
| | - Mou Han
- Department of Intervention, Chengdu Women and Children’s Central Hospital, Chengdu, China
| | - Xue Xiao
- Department of Gynecology and Obstetrics, West China Second University Hospital, Sichuan University, Chengdu, China
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Yang Z, Yang Y, Yin Z, Yao J. The role of internal iliac artery intraoperative vascular clamp temporary occlusion in abnormally invasive placenta. Int J Gynaecol Obstet 2023; 161:175-181. [PMID: 35986614 DOI: 10.1002/ijgo.14422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 07/22/2022] [Accepted: 08/15/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE To investigate the efficacy of internal iliac artery intraoperative vascular clamp temporary occlusion in the treatment of abnormally invasive placenta. METHOD This retrospective study enrolled 153 patients diagnosed with abnormally invasive placenta between January 2018 and December 2021. The patients were divided into a study group (n = 88, undergoing cesarean section followed by internal iliac artery vascular clamp temporary occlusion) and a control group (n = 65, receiving routine cesarean section). The general situation, intraoperative conditions, postoperative complications, and neonatal outcomes were compared between the two groups. RESULTS The hysterectomy rate in the study group was significantly lower than that in the control group. However, there were no significant differences in intraoperative blood loss, blood transfusion, postoperative intensive care unit transfer rate, or neonatal outcome between the groups. Further subgrouping showed that in patients with placenta increta, the hysterectomy rate and intraoperative bleeding amount were significantly lower in the occlusion group. Nevertheless, these advantages were not significantly different between the groups in patients with placenta percreta. CONCLUSION Vascular clamp temporary occlusion of internal iliac artery is an effective method for controlling hemorrhage and decreasing the incidence of hysterectomy in patients with placenta increta. For patients with placenta percreta, the benefit is limited.
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Affiliation(s)
- Ziling Yang
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Yuanyuan Yang
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Zongzhi Yin
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,NHC Key Laboratory of the Study of Abnormal Gametes and the Reproductive Tract, Anhui Medical University, Hefei, China
| | - Jie Yao
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
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Baldwin HJ, Randall DA, Maher R, West SP, Torvaldsen S, Morris JM, Patterson JA. Interventional radiology in obstetric patients: A population-based record linkage study of use and outcomes. Acta Obstet Gynecol Scand 2023; 102:370-377. [PMID: 36700375 PMCID: PMC9951351 DOI: 10.1111/aogs.14508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 12/07/2022] [Accepted: 12/21/2022] [Indexed: 01/27/2023]
Abstract
INTRODUCTION Interventional radiology (IR) is a technique for controlling hemorrhage and preserving fertility for women with serious obstetric conditions such as placenta accreta spectrum (PAS) or postpartum hemorrhage. This study examined maternal, pregnancy and hospital characteristics and outcomes for women receiving IR in pregnancy and postpartum. MATERIAL AND METHODS A population-based record linkage study was conducted, including all women who gave birth in hospital in New South Wales or the major tertiary hospital in the neighboring Australian Capital Territory, Australia, between 2003 and 2019. Data were obtained from birth and hospital records. Characteristics and outcomes of women who underwent IR in pregnancy or postpartum are described. Outcomes following IR were compared in a high-risk cohort of women: those with PAS who had a planned cesarean with hysterectomy. Women were grouped by those who did and those who did did not have IR and were matched using propensity score and other factors. RESULTS We identified IR in 236 pregnancies of 1 584 708 (15.0 per 100 000), including 208 in the delivery and 26 in a postpartum admission. Two-thirds of women receiving IR in the birth admission received a transfusion of red cells or blood products, 28% underwent hysterectomy and 12.5% were readmitted within 6 weeks. Other complications included: severe maternal morbidity (29.8%), genitourinary tract trauma/repair (17.3%) and deep vein thrombosis/pulmonary embolism (4.3%). Outcomes for women with PAS who underwent planned cesarean with hysterectomy were similar for those who did and did not receive IR, with a small reduction in transfusion requirement for those who received IR. CONCLUSIONS Interventional radiology is infrequently used in pregnant women. In our study it was performed at a limited number of hospitals, largely tertiary centers, with the level of adverse outcomes reflecting use in a high-risk population. For women with PAS undergoing planned cesarean with hysterectomy, most outcomes were similar for those receiving IR and those not receiving IR, but IR may reduce bleeding.
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Affiliation(s)
- Heather J. Baldwin
- The University of Sydney Northern Clinical SchoolWomen and Babies ResearchSt LeonardsNew South WalesAustralia,Northern Sydney Local Health DistrictKolling InstituteSt LeonardsNew South WalesAustralia
| | - Deborah A. Randall
- The University of Sydney Northern Clinical SchoolWomen and Babies ResearchSt LeonardsNew South WalesAustralia,Northern Sydney Local Health DistrictKolling InstituteSt LeonardsNew South WalesAustralia
| | - Richard Maher
- Department of RadiologyRoyal North Shore HospitalSt LeonardsNew South WalesAustralia
| | - Simon P. West
- Department of Obstetrics and GynaecologyRoyal North Shore HospitalSt LeonardsNew South WalesAustralia,The University of SydneySydney Medical School‐ NorthernSt LeonardsNew South WalesAustralia
| | - Siranda Torvaldsen
- The University of Sydney Northern Clinical SchoolWomen and Babies ResearchSt LeonardsNew South WalesAustralia,Northern Sydney Local Health DistrictKolling InstituteSt LeonardsNew South WalesAustralia,School of Population HealthUNSWSydneyNew South WalesAustralia
| | - Jonathan M. Morris
- The University of Sydney Northern Clinical SchoolWomen and Babies ResearchSt LeonardsNew South WalesAustralia,Northern Sydney Local Health DistrictKolling InstituteSt LeonardsNew South WalesAustralia,Department of Obstetrics and GynaecologyRoyal North Shore HospitalSt LeonardsNew South WalesAustralia
| | - Jillian A. Patterson
- The University of Sydney Northern Clinical SchoolWomen and Babies ResearchSt LeonardsNew South WalesAustralia,Northern Sydney Local Health DistrictKolling InstituteSt LeonardsNew South WalesAustralia
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A Review and Comparison of the Efficacy of Prophylactic Interventional Radiological Arterial Occlusions in Placenta Accreta Spectrum Patients: A Meta-analysis. Acad Radiol 2022:S1076-6332(22)00575-X. [DOI: 10.1016/j.acra.2022.10.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 10/05/2022] [Accepted: 10/19/2022] [Indexed: 11/15/2022]
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Enste R, Cricchio P, Dewandre PY, Braun T, Leonards CO, Niggemann P, Spies C, Henrich W, Kaufner L. Placenta accreta spectrum part I: anesthesia considerations based on an extended review of the literature. J Perinat Med 2022; 51:439-454. [PMID: 36181730 DOI: 10.1515/jpm-2022-0232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 09/05/2022] [Indexed: 11/15/2022]
Abstract
"Placenta accreta spectrum" (PAS) describes abnormal placental adherence to the uterine wall without spontaneous separation at delivery. Though relatively rare, PAS presents a particular challenge to anesthesiologists, as it is associated with massive peripartum hemorrhage and high maternal morbidity and mortality. Standardized evidence-based PAS management strategies are currently evolving and emphasize: "PAS centers of excellence", multidisciplinary teams, novel diagnostics/pharmaceuticals (especially regarding hemostasis, hemostatic agents, point-of-care diagnostics), and novel operative/interventional approaches (expectant management, balloon occlusion, embolization). Though available data are heterogeneous, these developments affect anesthetic management and must be considered in planed anesthetic approaches. This two-part review provides a critical overview of the current evidence and offers structured evidence-based recommendations to help anesthesiologists improve outcomes for women with PAS. This first part discusses PAS management in centers of excellence, multidisciplinary care team, anesthetic approach and monitoring, surgical approaches, patient safety checklists, temperature management, interventional radiology, postoperative care and pain therapy. The diagnosis and treatment of hemostatic disturbances and preoperative prepartum anemia, blood loss, transfusion management and postpartum venous thromboembolism will be addressed in the second part of this series.
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Affiliation(s)
- Rick Enste
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM, CVK), Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Patrick Cricchio
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM, CVK), Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Pierre-Yves Dewandre
- Department of Anesthesia and Intensive Care Medicine, Université de Liège, Liege, Belgium
| | - Thorsten Braun
- Department of Obstetrics and 'Exp. Obstetrics', Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Christopher O Leonards
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM, CVK), Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Phil Niggemann
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM, CVK), Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Claudia Spies
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM, CVK), Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Wolfgang Henrich
- Department of Obstetrics and 'Exp. Obstetrics', Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Lutz Kaufner
- Department of Anesthesiology and Operative Intensive Care Medicine (CCM, CVK), Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
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Ming Y, Zeng X, Zheng T, Luo Q, Zhang J, Zhang L. Epidemiology of placenta accreta spectrum disorders in Chinese pregnant women: A multicenter hospital-based study. Placenta 2022; 126:133-139. [DOI: 10.1016/j.placenta.2022.06.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 05/26/2022] [Accepted: 06/20/2022] [Indexed: 01/10/2023]
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11
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Luo Y, Qin Q, Zhao Y, Yin H. Application of Abdominal Aortic Balloon Occlusion Combined with Tourniquet in Pregnant Women with Severe Placenta Accreta Spectrum. Curr Med Sci 2022; 42:606-612. [PMID: 35460462 DOI: 10.1007/s11596-022-2584-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 01/07/2022] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Abdominal aortic balloon occlusion (AABO) is a vascular intervention method that has been widely used in the treatment of severe placenta accreta spectrum (PAS). The aim of this study was to investigate the benefits, potential risks, and characteristics of AABO combined with tourniquet binding of the lower uterine segment (LUS) in treatment of pregnant women with PAS. METHODS In this study, 64 pregnant women with PAS scores greater than 5 were enrolled as research subjects and divided into two groups. Group A (n=34) underwent normal operative procedures including tourniquet binding of the LUS. Group B (n=30) underwent AABO combined with tourniquet binding of the LUS. General clinical characteristics, ultrasonography PAS score, intraoperative blood loss (IBL), blood loss within 24 h after surgery (24-h BL), postoperative complications, and neonatal data of the two groups were retrospectively reviewed. The influencing factors of IBL for the two groups were analyzed. RESULTS The amounts of IBL, 24-h BL, total input red blood cell, and the incidence of disseminated intravascular coagulation were significantly lower in group B than in group A (P<0.05), and this difference was even more significant in the subgroup of placenta percreta (PAS scores ≥10). Further multivariate linear analysis showed that the combined therapy of AABO and tourniquet could independently predict lower IBL than normal operative procedures did (P=0.001). CONCLUSION AABO combined with tourniquet binding of the LUS could improve the outcomes of pregnant women with severe PAS and reduce serious peripartum complications of AABO.
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Affiliation(s)
- Yan Luo
- Department of Obstetrics, Maternal and Child Health Hospital of Hubei Province, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430070, China
| | - Qi Qin
- Health Science Center, Yangtze University, Jingzhou, 434023, China
| | - Yun Zhao
- Department of Obstetrics, Maternal and Child Health Hospital of Hubei Province, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430070, China
| | - Heng Yin
- Department of Obstetrics, Maternal and Child Health Hospital of Hubei Province, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430070, China.
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Chao WT, Ke HH, Shen SH, Yeh CC, Wang PH, Ho CM, Horng HC. A theoretical analysis of prophylactic common iliac arterial occlusion for potential massive bleeding during cesarean delivery: Decision-making considerations — A 2-year retrospective study. Taiwan J Obstet Gynecol 2022; 61:282-289. [DOI: 10.1016/j.tjog.2022.02.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/04/2021] [Indexed: 10/18/2022] Open
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13
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Xu X, Zhu X. Combined Efficacy of Balloon Occlusion and Uterine Artery Embolization on Coagulation Function in Patients with High-Risk Placenta Previa during Cesarean Section. Int J Clin Pract 2022; 2022:7750598. [PMID: 35685595 PMCID: PMC9159222 DOI: 10.1155/2022/7750598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 01/28/2022] [Accepted: 02/21/2022] [Indexed: 11/17/2022] Open
Abstract
PURPOSE The present study was performed in order to investigate the conbined effect of balloon occlusion and uterine artery embolization on coagulation function in patients with high-risk placenta previa during cesarean section. METHODS There involved a total of 38 patients with high-risk placenta previa undergoing cesarean section in our hospital from August 2019 to January 2021. The patients enrolled were randomly divided into study group (19 cases, receiving balloon occlusion combined with uterine artery embolization) and control group (19 cases, receiving conventional cesarean section). The operation time, intraoperative blood loss, plasma injection volume and hospital stay of the two groups were recorded. Moreover, the postoperative coagulation function indexes, including thrombin time (TT), fibrinogen (FBI), activated partial thromboplastin time (APTT) and prothrombin time (PT), were monitored and compared. Neonatal Apgar score and postoperative complications of the two groups were regarded as parameters for comparison. RESULTS The intraoperative blood loss, plasma injection volume and hospital stay of the study group were significantly lower compared with the control group (P < 0.05), whereas the operation time of the two groups was comparable (P > 0.05). Compared with the control group, the levels of TT, APTT and PT were lower while the level of FBI was higher in the study group (P < 0.05). The Apgar 1-min and 5-min scores of newborns were compared between the two groups (P > 0.05). However, the incidence of postoperative complications in the study group showed evidently lower outcomes compared with the control group (P < 0.05). CONCLUSION The combined approach of balloon occlusion and uterine artery embolization offered potential for improving the coagulation function of patients with high-risk placenta previa during cesarean section. In addition, the approach reduced the amount of blood loss and plasma injection, shortened the length of hospital stay, which was believed available for wide clinical application.
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Affiliation(s)
- Xiaoli Xu
- Department of Obstetrics and Gynecology, Gezhouba Central Hospital of Sinopharm, China Three Gorges University, Yichang, Hubei, China
| | - Xiayun Zhu
- Department of Obstetrics and Gynecology, Gezhouba Central Hospital of Sinopharm, China Three Gorges University, Yichang, Hubei, China
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14
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Riveros-Perez E, Sanchez MG, Odo N, Shukla M, Rungruang B. Supra-massive transfusion and interdisciplinary approach to cesarean hysterectomy due to complex placenta percreta: Case report. SAGE Open Med Case Rep 2021; 9:2050313X211010011. [PMID: 33959282 PMCID: PMC8060747 DOI: 10.1177/2050313x211010011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 03/22/2021] [Indexed: 11/29/2022] Open
Abstract
Placenta accreta spectrum encompasses a group of conditions of abnormal placental infiltration of the uterine wall and surrounding tissues. It is associated with significant blood loss, perioperative morbidity, and risk of death. A coordinated interdisciplinary approach to these complex cases and early resuscitation with blood products are critical factors in the successful management of patients affected by this disease. We describe the successful management of a patient with placenta percreta who required supra-massive transfusion of blood products and interventions by different specialized teams in a tertiary care center.
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Affiliation(s)
- Efrain Riveros-Perez
- Department of Anesthesiology and
Perioperative Medicine, Medical College of Georgia at Augusta University,
Augusta, GA, USA
- Outcomes Research Consortium,
Cleveland Clinic, Cleveland, OH, USA
| | - Maria Gabriela Sanchez
- Department of Anesthesiology and
Perioperative Medicine, Medical College of Georgia at Augusta University,
Augusta, GA, USA
| | - Nadine Odo
- Department of Anesthesiology and
Perioperative Medicine, Medical College of Georgia at Augusta University,
Augusta, GA, USA
| | - Mrinal Shukla
- Vascular Surgery Division,
Department of Surgery, Medical College of Georgia at Augusta University,
Augusta, GA, USA
| | - Bunya Rungruang
- Division of Gynecologic Oncology,
Department of Obstetrics and Gynecology, Medical College of Georgia at
Augusta University, Augusta, GA, USA
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15
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Liang D, Zhao H, Liu D, Lin Y. Internal iliac artery balloon occlusion in the management of placenta accreta: A systematic review and meta-analysis. Eur J Radiol 2021; 139:109711. [PMID: 33910145 DOI: 10.1016/j.ejrad.2021.109711] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 04/05/2021] [Accepted: 04/07/2021] [Indexed: 12/29/2022]
Abstract
PURPOSE To examine the effectiveness and safety of prophylactic internal iliac artery balloon occlusion for hemorrhage control in placenta accreta. METHOD EMBASE, PubMed, and the Cochrane Central Register of Controlled Trials data-bases were searched through November 2020. Clinical trials comparing the management of placenta accreta with and without internal iliac artery balloon occlusion were included. The meta-analysis results were expressed as the risk ratio (RR) or mean difference, with 95 % CIs. RESULTS Fifteen studies including 1098 women were eligible. No statistically significant difference was found between the internal arterial balloon occlusion group and the control group with respect to estimated blood loss volume (-0.525 mL, [95 % CI, -1.112 to -0.061], p = 0.079.), red blood cells (RBCs) transfused in observational studies (-0.682 mL, [95 % CI, -1.540 to 0.176], p = 0.119.) and in randomized controlled trials (0.134 mL, [95 % CI, -0.214 to 0.482], p = 0.451.), intensive care unit admission (p = 0.197), hysterectomy in observational studies (p = 0.969) and in randomized controlled trials (p = 0.323), urinary system injury in observational studies (p = 0.182) and in randomized controlled trials (p = 0.956), Apgar score at 5 min (p = 0.641), and neonatal intensive care unit admission (p = 0.973). CONCLUSIONS The currently available data demonstrate no significant differences between the internal iliac artery balloon occlusion group and the control group in blood loss and packed RBCs transfused for women with placenta accreta. Further large randomized controlled studies are needed to confirm our findings.
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Affiliation(s)
- Deku Liang
- Department of Obstetrics and Gynecology, Chengdu Women and Children's Central Hospital Affiliated to University of Electronic Science and Technology of China, Chengdu, 1617 Riyue Avenue, Qingyang District, Sichuan Province, China
| | - Hu Zhao
- Department of Obstetrics and Gynecology, Chengdu Women and Children's Central Hospital Affiliated to University of Electronic Science and Technology of China, Chengdu, 1617 Riyue Avenue, Qingyang District, Sichuan Province, China
| | - Dandan Liu
- Department of Obstetrics and Gynecology, Chengdu Women and Children's Central Hospital Affiliated to University of Electronic Science and Technology of China, Chengdu, 1617 Riyue Avenue, Qingyang District, Sichuan Province, China
| | - Yonghong Lin
- Department of Obstetrics and Gynecology, Chengdu Women and Children's Central Hospital Affiliated to University of Electronic Science and Technology of China, Chengdu, 1617 Riyue Avenue, Qingyang District, Sichuan Province, China.
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Nankali A, Salari N, Kazeminia M, Mohammadi M, Rasoulinya S, Hosseinian-Far M. The effect prophylactic internal iliac artery balloon occlusion in patients with placenta previa or placental accreta spectrum: a systematic review and meta-analysis. Reprod Biol Endocrinol 2021; 19:40. [PMID: 33663536 PMCID: PMC7931359 DOI: 10.1186/s12958-021-00722-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 02/23/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Placenta previa describes a placenta that extends partially or completely over the internal cervical oss. Placenta previa is one of the leading causes of widespread postpartum hemorrhage and maternal mortality worldwide. Another cause of bleeding in pregnant women is Placenta accreta spectrum. Therefore, the aim of the present systematic review and meta-analysis is to determine the effect of prophylactic balloon occlusion of the internal iliac arteries in patients with placenta previa or placental accreta spectrum (PAS). METHODS In this systematic review and meta-analysis, to identify and select relevant studies, the SID, MagIran, ScienceDirect, Embase, Scopus, PubMed, Web of Science, and Google Scholar databases were searched, using the keywords of internal iliac artery balloon, placenta, previa, balloon, accreta, increta and percreta, without a lower time limit and until 2020. The heterogeneity of the studies was examined using the I2 index, and subsequently a random effects model was applied. Data analysis was performed within the Comprehensive Meta-Analysis software (version 2). RESULTS In the review of 29 articles with a total sample size of 1140 in the control group, and 1225 in the balloon occlusion group, the mean difference between the two groups was calculated in terms of Intraoperative blood loss index (mL) and it was derived as 3.21 ± 0.38; moreover, in 15 studies with a sample size of 887 in the control group, and 760 in the balloon occlusion group, the mean difference between the two groups in terms of gestation index (weeks) was found as 2.84 ± 0.49; and also with regards to hysterectomy balloon occlusion after prophylactic closure of the iliac artery, hysterectomy (%) balloon occlusion was calculated as 8.9 %, and this, in the hysterectomy control group (%) was obtained as 31.2 %; these differences were statistically significant and showed a positive effect of the intervention (P < 0.05). CONCLUSION The results of this study show that the use of prophylactic internal iliac artery balloon occlusion in patients with placenta previa or Placenta accreta spectrum has benefits such as reduced intraoperative blood loss, reduced hysterectomy and increased gestation (weeks), which can be considered by midwives and obstetricians.
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Affiliation(s)
- Anisodowleh Nankali
- grid.412112.50000 0001 2012 5829Department of Obstetrics and Gynecology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Nader Salari
- grid.412112.50000 0001 2012 5829Department of Biostatistics, School of Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mohsen Kazeminia
- grid.412112.50000 0001 2012 5829Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Masoud Mohammadi
- grid.412112.50000 0001 2012 5829Department of Nursing, School of Nursing and Midwifery, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Samira Rasoulinya
- grid.412112.50000 0001 2012 5829Department of Obstetrics and Gynecology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Melika Hosseinian-Far
- grid.411301.60000 0001 0666 1211Department of Food Science & Technology, Faculty of Agriculture, Ferdowsi University of Mashhad (FUM), Mashhad, Iran
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17
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Zhu H, Wang S, Shi J, Yao L, Wang L, Chen H, Fang X. Prophylactic endovascular balloon occlusion of the aorta in cases of placenta accreta spectrum during caesarean section: points from the anaesthesiologist's perspective. BMC Pregnancy Childbirth 2020; 20:446. [PMID: 32758173 PMCID: PMC7404919 DOI: 10.1186/s12884-020-03136-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Accepted: 07/26/2020] [Indexed: 01/28/2023] Open
Abstract
Background The placenta accreta spectrum (PAS) is a severe complication of pregnancy and is associated with massive haemorrhage, hysterectomy, and even perinatal maternal-foetal death. Prophylactic abdominal aortic balloon occlusion (PAABO) is a novel and efficient therapy for these patients. The aim of this study was to investigate the benefits, potential risks, and characteristics of anaesthesia management. Methods A total of 48 parturients with PAS were enrolled and divided into two groups. Group A (n = 25) received PAABO, and Group B (n = 23) underwent a normal operative procedure. The characteristics of the general parameters, anaesthesia, and operative procedure were noted. Data on vital signs including systolic blood pressure (SBP), diastolic blood pressure (DBP) and heart rate (HR) during the operation were recorded. Before and after the procedure, hepatic and renal function and lactate dehydrogenase (LDH) were also measured. Results The characteristics of the groups were comparable. PAABO significantly reduced estimated blood loss, which was ≥ 1000 ml. Drastic fluctuations in SBP, DBP and HR were observed during inflation and deflation in Group B. After the operation, increased LDH and glutamic oxaloacetic transaminase (GOT) were observed in both groups, and increased glutamic-pyruvic transaminase (GTP) was observed in Group B. Conclusions PAABO reduced perioperative blood loss and the risk of hysterectomy among parturients with PAS. Sophisticated anaesthetic management should be implemented to prevent or reduce perioperative complications and address internal disorders that are caused by massive blood loss.
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Affiliation(s)
- Haijuan Zhu
- Department of Anaesthesiology, Anhui Women and Child Health Care Hospital, 230601, Hefei, China
| | - Shengyou Wang
- Department of Anaesthesiology, Anhui Women and Child Health Care Hospital, 230601, Hefei, China
| | - Jingfa Shi
- Department of Anaesthesiology, Anhui Women and Child Health Care Hospital, 230601, Hefei, China
| | - Lamei Yao
- Department of Anaesthesiology, Anhui Women and Child Health Care Hospital, 230601, Hefei, China
| | - Li Wang
- Department of Anaesthesiology, Anhui Women and Child Health Care Hospital, 230601, Hefei, China
| | - Hongbo Chen
- Department of Obstetrics and Gynecology, Anhui Women and Child Health Care Hospital, 230601, Hefei, China
| | - Xiangdong Fang
- Department of Anaesthesiology, Anhui Women and Child Health Care Hospital, 230601, Hefei, China.
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