Why does the electronic blood pressure monitor give different readings each time?
Disease description:
Every time I use an electronic blood pressure monitor to measure my grandfather's blood pressure, the results are different. Why does the electronic blood pressure monitor give different readings each time?
Doctor's answer (1)
Dr. Tian Hongbo
Fluctuations in the measurement results of electronic sphygmomanometers are common phenomena, mainly caused by the following factors:
1. Measurement method: During blood pressure measurement, factors such as the tightness of the cuff, arm position, and body posture may affect the measurement results. Therefore, it is important to follow the instructions manual or guidance from a healthcare professional carefully when taking measurements.
2. Physiological changes: Human blood pressure is not constant; it can be influenced by various factors including emotions, body position, physical activity, diet, and environmental temperature. Blood pressure may fluctuate even within a short period.
3. Device factors: The accuracy and stability of electronic sphygmomanometers are influenced by their design and quality. Long-term use or low battery power may affect the measurement accuracy.
4. Individual differences: Variations in vascular conditions and cardiac function among different individuals may also lead to different results under the same measurement conditions.
To obtain more accurate blood pressure measurements, it is recommended to regularly calibrate the electronic sphygmomanometer and strictly follow the correct measurement procedures. It is also advisable to take three consecutive measurements in a calm state and calculate the average value.
