BIOS 3AL1-3E - 3.2 Select the User; 3.3 Obtaining Accurate Measurements; 3.3 A Before Measuring; 3.3 B Common Sources of Error

3.2 Select the User
This blood pressure monitor is designed to store 99 measurements for each of two users. Before taking a
measurement, be certain that the correct user has been selected.
a) Press and hold the button for 3 seconds until the user icon in the upper left corner of
the LCD screen flashes.
b) Press the“ ” button to toggle between users.
c) Press the button again to confirm your selection. You will need to press the icon to cycle through each
time and date settings until you are back in default mode.
3.3 Obtaining Accurate Measurements
Your blood pressure can vary based on numerous factors, physiological conditions and your surroundings.
Follow these guidelines to obtain accurate and error free measurements of your blood pressure and pulse rate.
3.3A Before Measuring
• Avoideating,smokingaswellasallformsofexertiondirectlybeforethemeasurement.Allthesefactors
inuencethemeasurementresult.Relaxbysittinginanarmchairinaquietatmosphereforabout
5 minutes before the measurement.
• Alwaystakemeasurementsonthesamearm(normallyleft)andinthesameposture.Donotswitch
between right and left arms while recording your blood pressure as there may be a difference of up to
10 mmHg pressure between the two arms.
• Attempttocarryoutthemeasurementsregularlyatthesametimeofday,sincebloodpressurechanges
during the course of the day. The ideal time to measure your blood pressure is in the morning after you
wake up, before breakfast and physical activity, and in the absence of the urge to urinate.
• Restfor5minutessittingquietlyandreleaseallthetensioninyourbody—especiallythearmmuscles
— before beginning with the measurement. Remain calm and quiet when the measurement is in process.
Do not speak or move your arm (as well as other body) muscles during the process.
3.3B Common Sources of Error
All efforts by the patient to support the arm can increase the blood pressure. Make sure 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.
ATTENTION
Comparable blood pressure measurements always require the same conditions with a peaceful
and calm environment. Ensure that you take measurements under the same conditions to obtain an
accurate estimate of blood pressure variation patterns.
• Ifthearmarteryliesconsiderablylowerorhigherthantheheart,anerroneousvalueofbloodpressureis
measured. Each 15 cm difference in height results in a measurement error of 10 mmHg.
• Aloosecuff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 at least a 15 second pause or after the arm has
beenheldupinordertoallowtheaccumulatedbloodtoowaway.