What is Considered Normal Blood Pressure?

The normal range of blood pressure is 90-139 mmHg for systolic pressure and 60-89 mmHg for diastolic pressure. If there are any abnormal phenomena, medical attention should be sought as soon as possible. The blood pressure range in a normal adult at rest is relatively stable, with a normal range of 90-139 mmHg for systolic pressure, 60-89 mmHg for diastolic pressure, and 30-40 mmHg for pulse pressure.

(1) The brachial artery and the heart should be at the same level. When in the supine position, the cuff should be aligned with the mid-axillary line, and when in the sitting position, it should be aligned with the fourth rib.

(2) Roll up the sleeve to expose the arm, straighten the elbow, and place the palm upward.

(3) Turn on the sphygmomanometer, place it vertically and securely, and open the mercury trough switch.

(4) Remove all air from the cuff and wrap it around the middle of the upper arm, with the lower edge 2-3 cm from the cubital fossa, adjusting the tightness so that one finger can be inserted.

(5) Locate the brachial artery pulse and place the stethoscope head over the prominent pulse, securing it with one hand and gently applying pressure. Close the valve and inflate until the brachial artery pulse disappears, then increase the pressure by 20-30 mmHg.

(6) Gradually deflate the cuff at a rate of 4 mmHg/second, paying attention to the changes in the mercury column scale and the brachial artery sound.

(7) The scale indicated by the mercury column when the first audible pulse sound is heard through the stethoscope is the systolic pressure, and the scale indicated when the pulse sound suddenly becomes weak or disappears is the diastolic pressure.

(8) After the measurement is complete, deflate the cuff completely, tighten the valve screw cap, unwrap the cuff, put it away in the box, and close the mercury trough switch.

(9) Record the measured values using the fraction format, i.e., systolic pressure/diastolic pressure.

(1) The sphygmomanometer should be regularly inspected and calibrated to maintain accuracy.

(2) For individuals who require close monitoring of blood pressure, it is important to follow the "four fixes" principle: fixed time, fixed location, fixed position, and fixed sphygmomanometer.

(3) Avoid vigorous exercise, smoking, emotional changes, and other factors that may affect blood pressure within 30 minutes before measurement. Maintain a stable mood and ensure that the cuff is not too tight.

(4) Select an appropriate cuff based on the requirements.

(5) Avoid inflating the cuff too quickly or too forcefully to prevent mercury spillage. Deflation should also be neither too fast nor too slow to avoid reading errors.

(6) If the blood pressure is unclear or abnormal, a repeat measurement should be taken. Before retaking the measurement, ensure that the mercury column has returned to the "0" point.

(7) For patients with hemiplegia, measurements should be taken on the unaffected arm.