Tightening the cuff too much during blood pressure measurement may cause the measured blood pressure value to be lower than the actual blood pressure value. It is recommended to learn how to standardize blood pressure measurement under the guidance of a doctor to reduce the error.
If the cuff is wrapped too tightly during blood pressure measurement, an artificial pressure will be added to the brachial artery, resulting in a lower blood pressure value than the actual blood pressure value. A normal cuff binding should be tight enough to fit two fingers underneath the cuff. If the cuff is too loose or too tight, it will have an effect on the blood pressure.
Before measuring blood pressure, rest for 5 to 10 minutes, sit upright or lie down with the upper limbs slightly abducted so that the elbows are at the same level as the heart. Adjust the mercury column on the zero scale line, the cuff will be tied at the upper arm to be measured, so that the lower edge of the cuff from the elbow about 2 ~ 3 centimeters the width of the cuff should be covered by two-thirds of the upper arm. When everything is ready, start measuring blood pressure.
It is recommended that you learn to measure your blood pressure under the supervision of a doctor. Both mercury sphygmomanometers and electronic sphygmomanometers are available. Patients with high blood pressure and those with risk factors should monitor their blood pressure regularly. If you feel unwell, you should seek medical advice.