Daily blood pressure measurements are the primary means of diagnosing, treating, and evaluating the severity and classification of hypertension. It is usually measured clinically indirectly (the direct method is intra-arterial), i.e., at the brachial artery in the upper arm, usually in the right upper arm. In general, systolic blood pressure (SBP) and diastolic blood pressure (DBP) vary at different parts of the brachial tree, with SBP increasing and DBP decreasing at the more distal radial and finger arteries (wrist or finger ends). Therefore, the mercury sphygmomanometer is always considered the gold standard for clinical blood pressure measurement, and the standard position for measurement is the upper arm and the standard body position is sitting. The key points of daily blood pressure measurement: 1, the person being measured is sitting comfortably against the back, do not talk, the upper arm is bare or only the shirt sleeve is left, do not curl the clothes upward, the legs should not be crossed, five fingers are relaxed and straight; 2, the lower end of the cuff should be 2-3 cm above the elbow fossa, the stethoscope bell-shaped hearing head is bare at the brachial artery that can be traced in the elbow fossa, the middle of the cuff should be at the level of the right atrium (midpoint of the sternum); 3, the cuff bundle should Wrap at least 80% of the circumference of the upper arm. In the case of <80% (thicker upper arm), the radial artery blood pressure can be measured, again the lower end of the cuff should be 2-3 cm above the radial artery pulsation, and the bell-shaped stethoscope tip should be placed at the palpable radial artery pulsation;< p=""> 4. The cuff should be inflated to at least 30 mmHg plane above the vanishing point of the radial artery pulse at the beginning of the measurement, and the mercury column should drop 2-3 mmHg per second during deflation; 5. The first ( Cochrane 1) and the last (Cochrane 5) heard should be used as SBP and DBP. blood pressure on both upper arms should be measured for the first time for comparison. The main deviations to be noted and corrected are: 1. Measuring blood pressure too high or too low When a peripheral artery is stiff due to severe atherosclerosis, the cuff must have a higher pressure to compress it. If the pressure is not sufficient, the measured blood pressure will be high. This may lead to postural hypotension or other adverse effects as the patient is over-medicated with antihypertensive drugs. In most cases the right upper arm is used for daily measurement, if the left side data is used as the basis for treatment, it will be underestimated and less antihypertensive drugs will be used, affecting the blood pressure to meet the standard; 2. Correctly judge DBP Pregnant women, patients with arteriovenous leakage, those with incomplete closure of the aortic office and elderly patients with target organ damage with wide pulse pressure, when Koch’s sound stage 5 is usually difficult to disappear for a while, Koch’s sound stage 4 should be regarded as DBP; 3. Pay attention to the prone blood pressure measured by the nurse As the SBP and DBP are higher in the prone position than in the sitting position in both healthy people and hypertensive patients, and the increase in SBP is significant, and the blood pressure of the right upper limb is higher than that of the left upper limb, and this phenomenon is more prominent in hypertensive patients. Therefore, in the daily treatment, especially in the daily nursing work of cardiovascular department, geriatric department, nephrology department and neurology department, nurses should pay attention to this difference when measuring blood pressure, and should record on the first page of nursing whether the left upper limb or right upper limb is measured. Especially when measuring the blood pressure of the left upper extremity of a patient in shock in the prone position, the blood pressure measured by the nurse in clinical operation should be analyzed. In addition, the blood pressure of the elderly, obese, shorter, women and those with low sitting blood pressure are more vulnerable, so the blood pressure of the above groups should be cared for by routine sitting and lying blood pressure measurement. Because the prolonged increase of blood pressure in the recumbent position also leads to target organ damage; 4, alert to the unreliability of blood pressure when the radial artery pulsation disappears Aortic arch syndrome, also known as “pulseless disease”, is due to the narrowing or occlusion of the head and arm vessels causing the radial artery pulsation to weaken or disappear. It is common in aortitis, atherosclerosis, Raynaud’s disease, and diabetes mellitus. In the above cases, the lower extremity can be measured without narrowing or occlusion of the caddis artery, tibial artery, etc. to analyze; 5, pay attention to the change of blood pressure when the heart rhythm is very irregular, the amount of heartbeat and blood pressure of each heartbeat can be very different, should be measured several times and take its average. For example, in the presence of atrial fibrillation, 2-24 hour ambulatory observation can provide data similar to those in normal rhythm; in the presence of severe bradycardia (rhythm <47 beats/min), deflation should be slower than usual to avoid underestimation of SBP and overestimation of DBP. Given the consequences of inaccurate measurements, including the dangers of both over- and under-treatment, it is recommended that those observing and analyzing blood pressure be trained and that measurement sites be documented in outpatient and ward medical records.