5. Measurement Procedure
Please note: You should always be seated before and during measurement.
5.1. Before measurement:
• Avoid eating and smoking as well as all forms of exertion directly before
measurement. These factors influence the measurement result. Find time to
relax by sitting in an armchair in a quiet atmosphere for about ten minutes
before taking a measurement.
• Remove any garment that fits closely to your upper arm.
• Always measure on the same arm (normally left).
• Always compare measurements taken at the same time of day, since blood
pressure changes during the course of the day, as much as 20-40 mmHg.
5.2. Common sources of error:
Note: Comparable blood pressure measurements always require the
same conditions! Conditions should always be quiet.
• All efforts by the user to support the arm can increase blood pressure. Make
sure you are in a comfortable, relaxed position and do not flex any of the
muscles in the measurement arm during the measurement. Use a cushion for
support if necessary.
• If the arm artery lies considerably lower or higher than the heart, an erro-
neously high or low blood pressure will be measured! Each 15cm (6 inch) dif-
ference in height between your heart and the cuff results in a measurement
error of 10 mmHg!
• Cuffs that are too narrow or too short result in false measurement values.
Selecting the correct cuff is extremely important. Cuff size is dependent upon
the circumference of the arm (measured in the center). The permissible range
is printed on the cuff. If this is not suitable for your use, please call 1-800-
568-4147.
Note: Only use clinically approved Microlife cuffs!
• A loose cuff or a sideways protruding air pocket causes false measurement values.
• With repeated measurements, blood accumulates in the arm, which can lead
to false results. Consecutive blood pressure measurements should be repeat-
ed after a 1 minute pause or after your arm has been held up in order to allow
the accumulated blood to flow away.
If you decide to take your Averaging Mode measurement again, be sure to
wait at least one minute beforehand.
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