High mid-cut viscosity in whole blood indicates high blood viscosity and is an indicator of blood fluidity. Blood rheology is a test to study the fluidity and viscosity of blood as well as the aggregation and deformation of platelets and red blood cells in blood. It can be used in the diagnosis and treatment of diseases, and is also of great clinical significance in the development and prevention of diseases. Abnormalities in blood rheology are usually indicative of a disease that slows the flow of blood through the blood vessels. Slowed blood flow can lead to insufficient blood supply, and in severe cases, symptoms such as dizziness, blurred vision, confusion, chest tightness and shortness of breath may occur. It is also often associated with diseases such as diabetes, hypertension, leukemia, and peripheral vascular disease. If there are any abnormalities in blood rheology indicators, it is necessary to go to the hospital for medical treatment, and the doctor will formulate a treatment plan based on the patient’s condition.