General bilateral upper extremity blood pressure difference between 10 ~ 20mmHg, more than the upper limit, suggesting that the body may be in some kind of disease state, but first to exclude the measurement error caused by the blood pressure difference is too large.
Normal people bilateral upper limb blood pressure difference in 10~20mmHg, while the lower limb blood pressure is higher than the upper limb blood pressure of about 20~40mmHg, the normal difference is generally seen in the use of sphygmomanometer measurement. If arterial puncture or cannulation is used directly, there is no significant difference in bilateral blood pressure.
When the difference in blood pressure between the two upper extremities is too large, it suggests the possible presence of subclavian artery stenosis, polyarteritis, thromboembolic vasculitis, and other diseases, as well as a greater risk of cardiovascular disease.
When measuring blood pressure, it should be noted that at least two blood pressure measurements should be taken, with an interval of about 1~2 minutes between measurements, and the average value should be taken at the end, so as to minimize the error of measurement.
Note: If you find that the difference in blood pressure between two sides is too large, you should consult a regular medical institution in a timely manner to clarify the cause of the disease and carry out standardized treatment.