Measurement of blood pressure includes direct and indirect methods. Direct measurement is invasive, while indirect measurement is done with a sphygmomanometer. 1. Direct measurement: The catheter is sent to the peripheral arteries, such as the radial artery, through a skin puncture. The end of the catheter is connected to a pressure measuring device, which automatically displays the value of the blood pressure, although accurate, but it is an invasive operation, which is mainly used for difficult and critical cases. 2. Indirect measurement method: the examinee is forbidden to drink coffee for half an hour, rest for 5 minutes in a quiet state, sitting position, elbow and heart in the same plane, cuff wrapped around the elbow socket in 2.5 cm, stethoscope placed in the brachial artery under the cuff to auscultate, pressurize to the brachial artery pulsation disappears and then rise 30mmHg, slowly deflate to hear the first pulsation sound for systolic blood pressure, and then continue to deflate to the disappearance of pulsation sound for the diastolic blood pressure readings. In daily life, we should pay attention to monitor the blood pressure, non-same day more than three times found that blood pressure is elevated, it is recommended to consult the hospital as soon as possible.