Common Blood Pressure Measurement Mistakes Can Skew Results

A blood pressure reading may appear higher or lower than a person’s actual level if the measurement is not taken correctly. Paying attention to preparation, posture and equipment can help produce more reliable results.

Before taking a reading, sit quietly and allow time to rest. Exercise, smoking and caffeine shortly before a check can temporarily affect blood pressure, making the result less representative of a resting measurement.

Position also matters. Sit with your back supported, feet flat on the floor and legs uncrossed. Support the arm at heart level, and avoid talking or moving while the monitor is working.

Use a cuff that fits the upper arm properly and place it against bare skin rather than over clothing. An unsuitable cuff size or incorrect placement can distort the result, even when the monitor itself is functioning correctly.

An unexpected reading should not be treated as a diagnosis on its own. Repeat the measurement after resting, keep a record of results and seek medical advice if readings remain unusually high or low. Do not change prescribed medication based on a single home reading.