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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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V - How to measure high blood pressure?

Principles
5.1 - The most reliable method: to place a probe measuring the pressure directly in the artery
5.2 - The most useful method: The measure of the blood pressure using a sphygmomanometer with a cuff
Measurement of the blood pressure
5.3 - At rest at the doctors
5.4 - At rest at home, using a self-measurement device

5.5 - During a physical exercise
5.6 - Measurement by an ambulatory monitoring of the blood pressure during 24 hours
Description of the device
5.7 - The cuff
5.8 - Method for the measurement of the blood pressure
5.9 - The sphygmomanometer


5.9 - The sphygmomanometer

The pressure existing in the cuff will be transmitted by hollow pipes to a system which will give a legible blood pressure value. Several devices are currently available: those that use a mercury column, and those that use a metal membrane.

- Sphygmomanometer with mercury

It consists in a mercury column, which can allow the reading of the blood pressure.
This technique is the oldest and it is for this reason that the blood pressure unit is the millimetre of mercury. Up to now, this technique has been the basic method for measuring blood pressure. The results obtained are highly reliable in a long run, but the use of mercury will soon be prohibited within the European Community. It will thus be necessary to think of solutions for replacement, and to change the unit of measurement of the blood pressure (millimetre of mercury replaced by the kilopascal?).

This type of sphygmomanometer is exclusively reserved for the measurement of the blood pressure at the level of the arm.

- aneroid sphygmomanometer

This type of device does not contain mercury. A metal membrane located in a case translates the blood pressure transmitted by the cuff. This type of device is very practical to use and is generally reliable if it is regularly controlled.

This method constitutes a good alternative to the sphygmomanometer with mercury, which will be abandoned in a few years.

This device can produce blood pressure at the level of the arm, but also at the level of the wrist or the finger.

File last reviewed on : 18 dec 2011
 

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