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在怀孕的最后10天期间,牛的多普勒超声波和回声纹理参数的变化
Murat Can Demir1, Merve Sena Demir1, Burak Büyükbaki2
1Department of Obstetrics and Gynaecology, Faculty of Veterinary, University of Kafkas, Kars, Türkiye.
Veterinary medicine and science
|March 17, 2025
概括
超声波检测显示,在怀孕晚期,牛胎盘的回声质,输液和肌体厚度发生了显著的变化. 这些发现,特别是在最后几天,可能表明胎盘成熟过程.
科学领域:
- 兽医超声波检查 兽医超声波检查
- 牛的生殖生理学 在牛中的生殖生理学
背景情况:
- 晚期怀孕在奶牛中涉及复杂的生理适应.
- 监测子宫和胎盘健康是成功怀孕的关键.
研究的目的:
- 检查多普勒超声波对子宫动脉血流的变化.
- 为了评估胎盘回声质和输液的变化.
- 为了评估母乳腺厚度的变化在牛在怀孕的最后10天.
主要方法:
- 研究了8只怀孕的布朗瑞士奶牛.
- 测量包括胎盘面积,子宫厚度 (MT) 和回声纹理的平均灰色值 (MGV).
- 对子宫动脉的多普勒分析记录了脉冲率 (PR),阻力指数 (RI),血液流速 (BFVe),血液流量体积 (BFVo) 和直径 (DM).
主要成果:
- 胎盘面积和MT减少,而胎盘和肌肉膜的MGV随着时间的推移而增加 (p < 0.001).
- 胎盘输液在分娩前3天显著下降 (p < 0.05).
- 在怀孕和非怀孕的子宫角之间发现了BFVe/DM的显著差异;RI和PR也随着时间的推移发生了显著变化.
结论:
- 超声波检测结果显示,晚期怀孕的母牛有明显的变化.
- 观察到的变化,特别是在过去2天,表明与胎盘成熟机制的联系.
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