4. Carrying out a measurement
4.1. Before the measurement
• Avoideating,smokingaswellasallformsofexertiondirectlybeforethemeasurement.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.
• Removeanygarmentthatfitscloselytoyourupperarm.
• Measurealwaysonthesamewrist(normallyleft).
• Attempttocarryoutthemeasurementsregularlyatthesametimeofday,sincetheblood
pressure changes during the course of the day.
4.2. Common sources of error
Note: Comparable blood pressure measurements always require the same conditions! These are
normally always quiet conditions.
• Alleffortsbythepatienttosupportthearmcanincreasethebloodpressure.Makesure
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.
• Ifthearmarteryliesconsiderablylower(higher)thantheheart,anerroneouslyhigher(lower)
blood pressure will be measured! (Each 15 cm difference in height results in a measurement
error of 10 mmHg!)
• Cuffsthataretoonarrowortooshortresultinfalsemeasurementvalues.Selectingthecorrect
cuff is of extraordinary importance. The cuff size is dependent upon the circumference of the
arm (measured in the centre). The permissible range is printed on the cuff. If this is not suitable
for your use, please contact your dealer. Note: Only use clinically approved Original-Cuffs!
• Aloosecufforasidewaysprotrudingairpocketcausesfalsemeasurementvalues.
4.3. Fitting the cuff
a) Push the cuff over the left upper arm so that the tube
points in the direction of the lower arm.
b) Lay the cuff on the arm as illustrated. Make certain that
the lower edge of the cuff lies approximately
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