Very necessary: how to measure blood pressure

summary

How to measure blood pressure, many people think it is not our business, but with the improvement of medical wearable equipment, it is necessary to learn to measure blood pressure, now we widely use the method of blood pressure measurement is the application of sleeve compression of blood vessels. During inflation, once the pressure in the cuff exceeds the arterial systolic pressure, the blood vessel is closed and the blood flow is blocked, and the pulsating sound of the artery can not be heard at the distal end of the blood vessel. After deflation, when the pressure in the cuff is lower than the arterial systolic pressure, the blood vessel opens, the blood flow recovers, and the arterial pulsating sound is produced. When the first arterial pulsating sound (auscultation sound) is heard, the pressure in the cuff is the systolic pressure. When the pressure in the cuff is lower than the diastolic pressure, the blood vessel is completely unobstructed, the blood flow is no longer blocked, and the pulsatile sound of the artery disappears. At this time, the pressure in the cuff is the diastolic pressure. The diastolic blood pressure of children is more accurate to be determined by the pressure of sudden decrease of arterial pulse sound. Because the measurement of blood pressure is affected by many external factors, the correct measurement of blood pressure should be as follows:

Very necessary: how to measure blood pressure

First: choose the right sphygmomanometer: mercury sphygmomanometer is commonly used, barometer sphygmomanometer and electronic sphygmomanometer are also commonly used. The cuff width of sphygmomanometer should cover 2 / 3 of the length of upper arm, and the cuff length should reach 2 / 3 of the circumference of upper arm. If the cuff is too narrow, the measured blood pressure is high, and if the cuff is too long, the measured blood pressure is low.

Second: choose the appropriate pressure measurement environment: patients should rest for 5-10 minutes in a quiet environment with appropriate temperature, and should not be excessively bound between sleeves and arms, so as to avoid pressure measurement under stress state, such as arm filling or smoking, cold, drinking coffee.

Third: choose the correct pressure measurement steps: the patient takes the sitting position, the upper arm should be exposed, the palm should be extended upward, the elbow should be at the level of the heart, and the arm of the upper limb should be 45 degrees from the body. The distance between the lower edge of the cuff and the anterior cubital space is 2-3cm. The maximum inflation level is 4.0kpa (30mmhg) after inflation until the radial artery pulse disappears. If the pressure is too high, the systolic pressure will be too high. If the inflation reaches 40.0 kPa (300 mmHg), it will cause "balloon inflation hypertension". 27 kPa (2 mmHg) / s. The first auscultation sound is systolic blood pressure, and the diastolic blood pressure when the pulsatile sound disappears (the old blood pressure reading should be accurate to 2 mmHg).

matters needing attention

The time of inflation and compression should not be too long, otherwise it is easy to cause the false appearance of elevated blood pressure.