大型宫静脉:胎盘前期出血的关键危险因素
Akio Kamiya1, Takahiro Yamada1,2, Aya Yoshida1
1Department of Obstetrics and Gynecology, Kansai Medical University, Osaka, Japan.
Gynecologic and obstetric investigation
|July 8, 2025
概括
通过MRI检测到的大型宫静脉,是胎盘前期剖腹产期间大量流血的重要预测因素. 这一发现有助于对高风险怀孕进行更好的术前计划.
科学领域:
- 产科和妇科 产科和妇科
- 放射学 放射学是一门学科.
- 孕产妇和胎儿医学 孕产妇和胎儿医学
背景情况:
- 前胎盘在剖腹产期间存在大量手术内流血的重大风险.
- 宫静脉,宫的血管异常,越来越被认可,但它们对胎盘前出血的预测价值仍然不清楚.
研究的目的:
- 为了确定宫静脉的体积,通过MRI测量,预测巨大的手术内流血在患有胎盘前列病的患者.
- 探索宫静脉体积和胎盘位置,超声波结果和活跃出血之间的关联.
主要方法:
- 追溯性队列研究,对98名经过剖腹产的有胎盘前置的孕妇进行了研究.
- 磁共振成像 (MRI) 用于量化宫静脉体积 (aVCV).
- 接收器操作特征 (ROC) 分析和后勤回归确定了大规模失血 (≥1500毫升) 的预测因素.
主要成果:
- 在94.9%的病例中,通过MRI检测出宫静脉.
- 大约36.0厘米的宫静脉体积 (aVCV) 切线预测了大量的血液损失 (AUC:0.63).
- 大型宫静脉 (aVCV>36.0厘米3) 独立地与大量出血有关 (aOR:9.44) 并与后胎盘位置和海绵状超声检查结果相关.
结论:
- 大型宫静脉是巨大的手术内流血流失的重要独立预测因子.
- 这种关联在没有胎盘增生谱 (PAS) 的胎盘前后病例中尤为明显.
- 识别宫静脉扩张有助于进行术前风险评估,并为分娩期间出血做好准备.
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