高强交变磁场对绵羊血液黏度的影响

目的：探讨离体绵羊血液黏度在高强交变磁场中的变化及影响机制。方法：选择成年绵羊5只，颈动脉离断处死后取血，置于预先设计好的高强交变磁场中。在暴露前及暴露后分别采取血样，分为对照组及暴露组，并对其进行血液流变学指标检测及透射电镜超微结构分析。结果：与对照组比较，暴露组中全血高切黏度降低(P<0.05)，全血低切黏度及血浆黏度降低尤为明显(均P<0.01)；与对照组比较，暴露组中透射电镜显示红细胞形态发生变化，双凹圆盘状弧度及细胞体积变大。结论：高强交变磁场可能影响血液细胞表面电荷和分子电流的分布，降低细胞的聚集性，从而降低血液黏度。

Effect of high-intensity alternating magnetic field on viscosity of sheep blood

Objective: To explore the changes of blood viscosity in high-intensity alternating magnetic fi eldand the mechanisms.Methods: Five adult sheep were randomly selected and the blood samples were placed in highintensityalternating magnetic field. Before and after exposure, the blood samples were takenand divided into 2 groups: a control group and a magnetic field group. The blood rheology andtransmission electron microscopy (TEM) were performed.Results: Compared to the control group, the high shear viscosity of whole blood was decreased inthe magnetic fi eld group (P<0.05); the whole blood low shear viscosity and plasma viscosity were also decreased (both P<0.01). TEM showed the changes in red blood cell morphology and thedouble concave disc curvature. The radian of double concave disc and cell volume in the magneticfield group was larger than those in the control group.Conclusion: The high intensity alternating magnetic field may affect the distribution of surfacecharge and molecular current in blood cells, which in turn decrease the aggregation of cells and theblood viscosity.