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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 meas-
urement. These factors influence the measurement result. Find time to relax by
sitting in an armchair in a quiet atmosphere for about ten minutes before meas-
urement.
• 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 pres-
sure changes during the course of the day.
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 erroneously
high or low blood pressure will be measured! Each 15cm (6 inch) difference 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 print-
ed on the cuff. If this is not suitable for your use, please call 1-800-568-4147.
Note: Only use clinically approved 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 repeated after
a 1 minute pause or after your arm has been held up in order to allow the accumu-
lated blood to flow away.
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