Heppelmann Maike, Krüger Lars, Leidl Stephanie, Bollwein Heinrich
Clinic for Cattle, University of Veterinary Medicine, Foundation, 30173 Hannover,
J Vet Sci. 2013;14(3):323-7. doi: 10.4142/jvs.2013.14.3.323. Epub 2013 Jun 28.
Transrectal Doppler sonography was used to evaluate uterine blood flow during the first two weeks after parturition in six primiparous Simmental cows. The uterine blood flow was evaluated on the day of parturition (Day 0), once daily from Days 1 to 8 and then every other day until Day 14. Blood flow was quantified by determining the diameter (D), the time-averaged maximum velocity (TAMV), the pulsatility index (PI) and the blood flow volume (BFV) of the uterine arteries ipsilateral and contralateral to the formerly pregnant uterine horn. During the first four days after calving D, TAMV and BFV declined (ipsilateral: TAMV 70%, BFV 87%, contralateral: D 47%, BFV 84%; p < 0.05), while PI increased (ipsilateral 158%, contralateral 100%; p < 0.05) distinctly. Between Days 4 and 14 only the ipsilateral D (12%) and the BFV of both arteries (ipsilateral 5%, contralateral 8%) decreased (p < 0.05). Blood flow variables were very strongly correlated with each other (r > ±0.75, p < 0.05), with negative correlations with PI and positive correlations with all other investigated factors. Overall, this study revealed characteristic changes in uterine perfusion during the first two weeks after parturition in cows that were pronounced during the first four days postpartum.
采用经直肠多普勒超声检查法，对6头初产西门塔尔奶牛产后前两周的子宫血流情况进行评估。在分娩当天（第0天）评估子宫血流，从第1天到第8天每天评估一次，然后每隔一天评估一次，直至第14天。通过测定与先前怀孕子宫角同侧和对侧子宫动脉的直径（D）、时间平均最大流速（TAMV）、搏动指数（PI）和血流量（BFV）来量化血流情况。产犊后的前四天，D、TAMV和BFV下降（同侧：TAMV下降70%，BFV下降87%；对侧：D下降47%，BFV下降84%；p<0.05），而PI显著升高（同侧升高158%，对侧升高100%；p<0.05）。在第4天至第14天期间，仅同侧D（下降12%）以及两侧动脉的BFV（同侧下降5%，对侧下降8%）下降（p<0.05）。血流变量之间相关性非常强（r>±0.75，p<0.05），与PI呈负相关，与所有其他研究因素呈正相关。总体而言，本研究揭示了奶牛产后前两周子宫灌注的特征性变化，这些变化在产后的前四天最为明显。
