Arterial pressure refers to the blood pressure of the aorta, which is the lateral pressure of blood against the aortic vessel wall and is divided into systolic and diastolic pressures. Adequate blood volume is a prerequisite for the formation of arterial pressure. Arterial pressure can indicate the magnitude of the pressure of blood flowing into the capillaries. The level of blood pressure is related to the contraction force of the heart, cardiac output, size of the vascular lumen, vascular tone, blood viscosity, and kidney function. Arterial blood pressure must be within a reasonable range; too high or too low can have adverse effects on the body. If the blood pressure is too low, the distal part of the body or the head will not get more blood supply, so there will be dizziness and cold extremities. If the blood pressure is too high, the blood vessels may rupture and bleed. The measurement of arterial pressure is of great significance for the diagnosis and prognosis of cardiovascular diseases, and is one of the important indicators of the body’s circulatory function.