奶牛围产期血液流变学主要指标的变化规律

为了解健康奶牛围产期血液流变学的变化规律，对１５头围产期（产前９０ｄ至产后３０ｄ）奶牛血液流变学的全血高、低切变率粘度，全血高、低切变率还原粘度，红细胞聚积指数，红细胞压积（ＰＣＶ），血浆粘度等５项指标进行了系统检测。结果表明，在产前９０～５ｄ，上述５项指标均呈下降趋势，且分别于分娩前１０、８、５、３、１ｄ降至最低水平；产后１～３ｄ内，除ＰＣＶ外，上述４项指标迅速升高达最高值，产后１周以后，随着泌乳量的逐日增加而逐渐恢复到常态。

Changes of Main Hemorgheological Parameters of Dairy Cows During Perinatal Period

Main hemorheological parameters of 15 healthy dairy cows during perinatal period (from 90 days preparturition through 30 days postparturition) were measured and analyzed with the basical change regulation or general trends of whole blood viscosity (at high and low shear rates), whole blood reduced viscosity, hematocrit(%), erythrocyte accumulation index, plasma viscosity (ratio) to be described. The results are as follows: all of above mentioned five hemorheological parameters are getting decrease on 90-5 days preparturition and at the lowest level on 10, 8, 5, 3, 1 days preparturition respectively, then 4 out of the 5 hemorheological parameters except PCV are increasing quickly, reaching up to its highest level on 1-3 days postparturition and gradually return to the normal level since 1 week postparturition.