Purpose: To assess the efficacy and safety of abdominal aortic (AA) balloon occlusion versus internal iliac arteries (IIA) balloon occlusion in patients with placenta accreta spectrum (PAS) disorders.
Methods: Databases of Embase, PubMed, Web of Science and Cochrane Library were systematically searched from inception to May 2020. The relevant literature was screened and the quality was assessed. RevMan software 5.3 was used to analyze the data.
Results: Six studies involving 239 patients in AA occlusion and 281 patients in IIA occlusion were included. The results demonstrated that the intraoperative hemorrhage volume (MD - 410.61 ml, 95% CI -779.74 to -41.47 ml, p < 0.001), balloon dilatation duration (MD -5.34 min, 95% CI -9.91 to -0.77 min, p = 0.02) and fetus radiation dose (MD-20.81 mGy, 95% CI -31.84 to -9.78 mGy, p < 0.001) were significantly less in AA occlusion compared to IIA occlusion. There was no significant difference in the rate of lower extremity thrombosis between AA occlusion and IIA occlusion (OR 0.21, 95% CI 0.02 to 2.21, p = 0.19); similarly, no significant differences were found in blood transfusion volume (MD -344.50 ml, 95% CI -735.74 to 46.74 ml, p = 0.08), the rate of hysterectomy (OR 0.99, 95% CI 0.22 to 4.44, p = 0.99) and other outcome variables.
Conclusion: The available data demonstrated AA occlusion was more effective in reducing intraoperative hemorrhage volume and fetus radiation dose compared with IIA occlusion in patients with PAS disorders. Larger studies or randomized controlled trials are needed to further assert this evidence.
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