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https://www.cas.cn/xw/kjsm/gjdt/201106/t20110609_3284674.shtml
Utilizing magnetic fields to reduce human blood viscosity
If a person’s blood is too thick, it can increase blood pressure, damage blood vessels, and increase the risk of heart attack. According to a report by the American Physicists Network on June 8th (Beijing time), physicists at Temple University in the United States recently discovered that using a magnetic field can reduce the viscosity of human blood. The research paper was published in the recently published “Physical Review E Series”.
At present, the only way to dilute blood is to use drugs such as aspirin, but these drugs can bring side effects. Professor Tao Rongjia from Tianpu University, who had previously invented the method of using an electric or magnetic field to reduce the viscosity of oil in engines or pipelines, extended this method to the control of blood viscosity. After testing a large number of blood samples, it was found that using a magnetic field can also dilute blood in the human circulatory system.
Because red blood cells contain iron, applying a magnetic field can polarize them, causing them to move together in short chains and streamline. As these short chains are larger than individual blood cells, their friction with the blood vessel wall decreases when they flow towards the center. This connection effect reduces blood viscosity and helps them flow more smoothly. Applying a 1.3 Tesla magnetic field to the blood for about 1 minute can reduce blood viscosity by 20% to 30%, and this intensity is only equivalent to the magnetic field intensity of magnetic resonance imaging. When the magnetic field is removed, the blood in the blood vessels will slowly return to its original viscous state, but this will take several hours.
By selecting the appropriate magnetic field intensity and pulse time, we can control the size of red blood cell aggregation chains, thereby controlling blood viscosity. This magnetorheological method provides an effective way to control blood viscosity within a selectable range. “Tao Rongjia explained that this method is not only safe, but also repeatable, and can reduce blood viscosity by applying multiple magnetic fields, Moreover, the decrease in viscosity does not affect the normal function of red blood cells.
Tao Rongjia also stated that further research is needed on this method to ultimately develop a new therapy for preventing heart attacks.
如果人的血液太过黏稠，就会使血压增高，损害血管，增加心脏病发作的风险。据美国物理学家组织网6月8日（北京时间）报道，美国天普大学物理学家最近发现，利用磁场可降低人类血液黏度。研究论文发表在近日出版的《物理评论E辑》上。
目前，稀释血液的唯一方法是利用阿司匹林等药物，但这些药会带来副作用。曾发明过用电场或磁场降低发动机或管道中油脂黏度这一方法的天普大学教授陶荣家（音译）将这种方法推广到血液黏度的控制中，通过测试大量血液样本后发现，利用磁场也可稀释人类循环系统中的血液。
因为红细胞含铁，施加磁场能将红血细胞极化，使它们以短链、流线运动的形式连在一起，由于这些短链比单个的血细胞要大，它们向着中心流下来时，与血管壁的摩擦就会减少。这种连接效果降低了血液黏度，有助于它们更加顺畅地流动。给血液施加一个1.3特斯拉的磁场约1分钟，就能将血液黏稠度降低20%到30%，且这个强度只相当于核磁共振成像的磁场强度。当磁场被移开时，血液在血管中会慢慢恢复为原来的黏稠状态，但这要经过几个小时。
“通过选择合适的磁场强度和脉冲时间，我们就能控制红细胞聚集成链的大小，由此控制血液黏度。这种磁流变的方法提供了一个有效的途径，能在可选择的范围内控制血液黏度。”陶荣家解释说，这种方法不仅安全，还可重复，可以通过多次施加磁场的方式来降低血液黏度，而且黏度降低并不影响红细胞的正常功能。
陶荣家还表示，该方法仍需要进一步研究，以此为基础能最终开发出一种预防心脏病发作的新疗法。