1. Equipment factors
Quality issues: Some inferior or counterfeit Digital Sphygmomanometers may have inaccurate measurements due to poor production processes and component quality.
Aging and damage: Digital Sphygmomanometers that have been used for a long time may have problems such as sensor aging and cuff leakage, which affect the accuracy of the measurement results.
Uncalibrated: Digital Sphygmomanometers need to be calibrated regularly. If they are not calibrated for a long time, the measurement results may be biased.
2. Usage factors
Incorrect posture: When measuring, the arm position is too high or too low, the body is tilted, and the cuff is wrapped too loosely or too tightly, which will cause errors in the measurement results.
Measurement environment: Measuring in a cold, noisy or tense environment may cause vasoconstriction or emotional fluctuations in the human body, affecting the blood pressure measurement results.
Measurement time: Human blood pressure fluctuates throughout the day. If measured during a period of unstable blood pressure, such as just after exercise or shortly after a meal, inaccurate results may be obtained.
Improper operation: such as rapid inflation or deflation, talking or moving the arm during measurement, etc., can also interfere with the accuracy of the measurement.
3. Individual factors
Special populations: For some special populations with severe arrhythmias, peripheral vascular diseases, etc., the measurement results of the Digital Sphygmomanometer may not be accurate enough, because these diseases affect the normal conduction and detection of arterial pulsation.
Obesity: Obese patients have more upper arm fat, which may prevent the cuff from fitting well to the blood vessels, resulting in higher measurement results.
