Microlife BP3GR1-3P, Instruction Manual

Page: 17 / 61

15
5. How do I take a measurement?
Please note: You should always be seated before and
during measurement.
5.1. Preparing to take a 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 5 minutes before
your measurement.
• Remove any garment that fits closely to your upper arm.
• Always measure on the same arm (normally left).
• Compare measurements 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 errors
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 15 cm (6”) 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
printed on the cuff. If this is not suitable for your use, please
call 1-800-568-4147.
• 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