![]() ![]() The reduction rate can be controlled by selecting suitable magnetic field and duration of field application to make blood viscosity within the normal range. While this reduction is not permanent, it lasts for several hours and repeatable. This change in rheology reduces the effective viscosity as high as 20-30%. Therefore, when we apply a strong magnetic field, the red cells make their diameters align in the field direction to form short chains. Red blood cells contain iron and are sensitive to magnetic field. Before we can define viscosity, then, we need to define laminar flow and turbulent flow. ![]() There is a relationship between blood pressure and blood viscosity. The precise definition of viscosity is based on laminar, or nonturbulent, flow. ![]() The effective viscosity of whole blood increases mainly due to the red blood cells, which have a volume fraction about 40% or above. Viscosity of blood is the measure of thickness and stickiness of blood. The base liquid, plasma, has low viscosity. Blood is a suspension of red blood cells (erythrocytes), white blood cells (leukocytes) and platelets in plasma, a complex solution of gases, salts, proteins, carbohydrates, and lipids. Here we report our new finding that the blood viscosity can be reduced by pulsed magnetic field. While this issue is very important, currently the only method to reduce the blood viscosity is to take medicine, such as aspirin. When blood is viscous, in addition to a high blood pressure required for the blood circulation, blood vessel walls are also easy to be damaged. Blood viscosity is a major player in heart disease. ![]()
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