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5. Carrying out a measurement
5.1. Before the measurement
Avoid eating, smoking as well as all forms of exertion directly before the
measurement. All these factors influence the measurement result. Try and
find time to relax by sitting in an armchair in a quite atmosphere for about
ten minutes before the measurement.
Measure always on the same arm (normally left).
Attempt to carry out the measurements regularly at the same time of day,
since the blood-pressure changes during the course of the day.
5.2. Common sources of error
Note: Comparable blood-pressure measurements always require the same
conditions! These are normally always quiet conditions.
All efforts by the patient to support the arm can increase the blood-pres-
sure. Make sure you are in a comfortable, relaxed position and do not
activate any of the muscles in the measurement arm during the measure-
ment. Use a cushion for support if necessary.
The performance of the automated sphygmomanometer can be affected
by extremes of temperature, humidity and altitude.
Avoid compression or restriction of the connection tubing.
A loose cuff causes false measurement values.
With repeated measurements, blood accumulates in the respective arm,
which can lead to false results. Correctly executed blood-pressure mea-
surements should therefore first be repeated after a 5 minute pause or
after the arm has been held up in order to allow the accumulated blood to
flow away (after at least 3 minutes).
5.3. Fitting the cuff
Insert air connector into air outlet shown in right photo and please make sure
the fitting of the air connector completely and properly to avoid air leakage .
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