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Cesarean hysterectomy in pregnancies complicated with placenta previa accreta: a retrospective hospital-based study
Yongchi Zhan1,2, Enfan Lu2,3, Tingting Xu1,2
1Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, China.
Background:
Placenta previa accreta (PPA) is a severe obstetric condition that can cause massive postpartum hemorrhage and transfusion. Cesarean hysterectomy is necessary in some severe cases of PPA to stop the life-threatening bleeding, but cesarean hysterectomy can be associated with significant surgical blood loss and major complications. The current study is conducted to investigate the potential risk factors of excessive blood loss during cesarean hysterectomy in women with PPA.
Methods:
This is a retrospective study including singleton pregnancies after 28 weeks of gestation in women with placenta previa and pathologically confirmed placenta accreta spectrum who received hysterectomy during cesarean sections. A total of 199 women from January 2012 to August 2023 were included in this study and were divided into Group 1 (estimated surgical blood loss (EBL) ≤ 3500 mL, n = 103) and Group 2 (EBL > 3500 mL, n = 96). The primary outcome was defined as an EBL over 3500 mL. Baseline characteristics and surgical outcomes were compared between the two groups. A multivariate logistic regression model was applied to find potential risk factors of the primary outcome.
Results:
Massive surgical blood loss was prevalent in our study group, with a median EBL of 3500 mL. The multivariate logistic analysis showed that emergency surgery (OR 2.18, 95% CI 1.08-4.41, p = 0.029), cervical invasion of the placenta (OR 2.70, 95% CI 1.43-5.10, p = 0.002), and intraoperative bladder injury (OR 5.18, 95% CI 2.02-13.28, p = 0.001) were all associated with the primary outcome. Bilateral internal iliac arteries balloon occlusion (OR 0.57, 95% CI 0.34-0.97) and abdominal aortic balloon occlusion (OR 0.33, 95% CI 0.19-0.56) were negatively associated with the primary outcome.
Conclusions:
Emergency surgery, cervical invasion of the placenta, and intraoperative bladder injury were potential risk factors for additional EBL during cesarean hysterectomy in women with PPA. Future prospective studies are needed to confirm the effect of intra-arterial balloon occlusion in cesarean hysterectomy of PPA.
