Common Sources Of Error; Fitting The Cuff - Marque Verte BP 3BQ1-3 Mode D'emploi

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-pressure. Make sure
you are in a comfortable, relaxed position and do not activate any of the muscles in the
measurement arm during the measurement. Use a cushion for support if necessary.
• If the wrist artery lies considerably lower (higher) than the heart, an erroneously higher
(lower) blood-pressure will be measured! (Each 15cm difference in height results in a
measurement error of 10mmHg!)
• 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 measurements 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

a) Remove all eventual objects and jewellery (e.g.
wristwatch) from the wrist in question. Draw the
cuff over the wrist. (normally and the left side).
b) The distance between the cuff and the hand should
be approx. 10 mm.
c) Secure the cuff with the Velcro fastener, so that it lies
comfortably and not too tight, whereby no space
should remain between the cuff and the wrist.
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