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Definition of high blood pressure
What to do in case of hypertension?
For a better understanding of blood pressure The follow-up of a high blood pressure
High blood pressure damage High blood pressure and special cases
Why does high blood pressure exist? The self-measurement of blood pressure
How to measure high blood pressure? About Us
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IX - A good means of controling high blood pressure : The self-measurement of blood pressure

10.1 - Why using a self-measurement device?
10.2 - The self-measurement device
10.3 - The Inflation and deflating of the cuff
10.4 - Ideal anatomical site for the measurement of the blood pressure
10.5 - Validation of the device
10.6 - Conditions and number of measurements


10.4 - Ideal anatomical site for the measurement of the blood pressure

10.4.1 - Anatomical site of reference

The blood pressure must be measured as close as possible to the aorta, the artery which comes out directly from the heart.

Thus, the reference measurement of the blood pressure is established by a measurement at the level of the artery of the arm (humeral artery), because this artery is the closest to the heart and most easily accessible.

10.4.2 - Other sites of measurement

The blood pressure can also be recorded at the level of the arteries of the wrist and even of the fingers. Nevertheless, these sites are by themselves source of error because their distance from the heart is responsible for an artificial rise in the blood pressure.


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Moreover, during the measurement, it is very important to place the site of measurement at the level of the heart because gravity is also another source of error.

Indeed, if the subject takes its blood pressure upright, with an outstretched arm along the body, the blood pressure measured at the level of the arm could be raised on an average of 3 millimetres of mercury, whereas if it is measured at the level of the wrist, this increase could be of 15 millimetres of mercury, compared to the blood pressure measured in the aorta!

If the patient is seated, blood pressure variation along the arterial tree is less important, and value of the blood pressure at the brachial site is closed to the value measured at the wrist. For that reason, the device that measure blood pressure at the wrist could perfectly be used in clinical practice.

We thus recommend to choose a self-measurement device of blood pressure, which preferably measures the blood pressure at the level of the arm, or at the wrist, compared to a device measuring the blood pressure at the level the fingers.

File last reviewed on : 18 dec 2011
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