骨盆尺寸与荷尔斯坦牛分娩时所需的最大引力之间的关系使用生物机械产科模拟器
Angeliki Tsaousioti1, Anastasia Praxitelous1, Michail Patsikas2
1Clinic of Farm Animals, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54627 Thessaloniki, Greece.
Animals : an open access journal from MDPI
|July 13, 2024
概括
荷尔斯坦牛的骨盆尺寸显著影响了小牛的引力,而较小的骨盆需要更大的力. 牛犊的大小的影响较小,但对于安全的产卵,存在关键的骨盆尺寸值.
科学领域:
- 兽医生物力学 兽医生物力学
- 动物繁殖科学 动物繁殖科学
背景情况:
- 评估荷尔斯坦牛的分娩困难对于动物福利和群体生产力至关重要.
- 在分娩期间的引力受到母亲的骨盆尺寸和胎儿生物识别的影响.
- 了解这些关系可以有助于管理dystocia病例.
研究的目的:
- 为了研究霍尔斯坦牛的骨盆尺寸在模拟分娩期间对引力的影响.
- 探索小牛的测量和所需的引力之间的关系.
- 确定关键的骨盆尺寸值,影响分娩辅助.
主要方法:
- 使用一个经过修改的体外生物机械模型,使用六只霍尔斯坦牛骨盆和六只死产小牛.
- 使用计算机断层扫描 (CT) 测量了盆腔入口和腔的参数.
- 执行了36次模拟产科抽出,用专门的软件记录引力.
主要成果:
- 盆腔尺寸与引力呈指数关系,特别是肘部和盆腔入口 (r2 > 0.5).
- 较小的骨盆需要显著更高的力;确定了关键值.
- 牛犊测量显示较弱,主要是与引力 (较低大小) 的线性相关.
- 结合骨盆和小腿参数的多变量模型产生了高预测值 (r2高达0.75).
结论:
- 孕产妇的骨盆尺寸是模拟分娩期间引力的主要决定因素,其作用呈指数级.
- 牛犊生物识别对所需的引力有次要的,较弱的影响.
- 确定关键的骨盆尺寸对于预测和管理霍尔斯坦牛的分娩困难至关重要.
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