M-BP 3BU1-3_E&TR.qxd 09.11.2004 10:47 Page 10
10) The exact time can now be entered by pressing the 5.2. Common sources of error:
MEMORY button. (Example: 30 x presses) 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
11) Now after all settings have been made, press the are in a comfortable, relaxed position and do not activate any of the muscles in the
TIME button once again. The date is briefly displayed measurement arm during the measurement. Use a cushion for support if necessary.
and then the time. The input is now confirmed and • If the wrist artery lies considerably lower (higher) than the heart, an erroneously higher
the clock begins to run. (lower) blood-pressure will be measured! (Each 15cm difference in height results in a
measurement error of10mmHg!)
• A loose cuff causes false measurement values.
• With repeated measurements, blood accumulates in the respective arm, which can lead to
~ Further Information false results. Correctly executed blood-pressure measurements should therefore first be
With each press of the button (TIME, MEMORY) one input is made (e.g. switching over from hours repeated after a 5 minute pause or after the arm has been held up in order to allow the
to minutes mode, or altering the value by +1). accumulated blood to flow away (after at least 3 minutes).
However, if you keep the respective button depressed, you can switch more quickly to the desired
mode, or find the desired value respectively. 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.
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 wrist (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.
10 11