Richardson G F, Klemmer A D, Knudsen D B
Can Vet J. 1981 Jun;22(6):189-91.
Serum samples were obtained from 26 beef cows with uterine prolapse and from 15 with minor dystocia (controls). The serum of animals with uterine prolapse had significantly lower calcium concentration (mean +/- S.D. = 8,22 +/- 0,69 mg/dL, P</=0,01), higher phosphorus concentration (mean +/- S.D. = 4,78 +/- 1,75 mg/dL, P</=0,05) and lower calcium to phosphorus ratios (mean +/- S.D. = 1,99 +/- 0,88, P</=0,01) than for the control animals (means +/- S.D. = 8,91 +/- 0,75 mg/dL, 3,54 +/- 1,41 mg/dL and 2,99 +/- 1,41 respectively). Mild hypocalcemia (6,9 mg/dL-7,9 mg/dL) was present in 11 (42,3%) of the cows with prolapse as compared to only one (6,7%) of the controls. Hypophosphatemia was present in 11 (42,3%) of the animals with prolapse and in ten (66,7%) of the controls. Eighteen (69,2%) of the animals with prolapse were alert and ambulatory when treated and 15 (57,7%) were known to have required help to deliver the calf. Of the cattle group with uterine prolapse, 14 (53,8%) were two years old, six (23,1%) were three years old, and six (23,1%) were four years of age or older. It was concluded that mild hypocalcemia and some degree of dystocia were associated with the uterine prolapses. The phosphorus results were equivocal but the high incidence of hypophosphatemia may reflect a phosphorus deficient diet.
从26头患有子宫脱垂的奶牛和15头患有轻度难产的奶牛（对照组）采集血清样本。子宫脱垂奶牛的血清钙浓度显著较低（均值±标准差 = 8.22±0.69mg/dL，P≤0.01），磷浓度较高（均值±标准差 = 4.78±1.75mg/dL，P≤0.05），钙磷比更低（均值±标准差 = 1.99±0.88，P≤0.01），而对照组奶牛的相应指标分别为（均值±标准差 = 8.91±0.75mg/dL、3.54±1.41mg/dL和2.99±1.41）。11头（42.3%）子宫脱垂奶牛存在轻度低钙血症（6.9mg/dL - 7.9mg/dL），而对照组只有1头（6.7%）。11头（42.3%）子宫脱垂奶牛和10头（66.7%）对照组奶牛存在低磷血症。18头（69.2%）子宫脱垂奶牛在接受治疗时警觉且能走动，已知有15头（57.7%）在分娩时需要帮助。在子宫脱垂的牛群中，14头（53.8%）为两岁，6头（23.1%）为三岁，6头（23.1%）为四岁及以上。研究得出结论，轻度低钙血症和一定程度的难产与子宫脱垂有关。磷的检测结果不明确，但低磷血症的高发生率可能反映了磷缺乏的饮食。
