A Before Measuring; B Common Sources Of Error; C Fitting The Wide Range Cuff - BIOS Diagnostics PROTOCOL 7D MII BD250 Instruction Manual

3.3A Before Measuring

• Avoid eating, smoking as well as all forms of exertion directly before the measurement. All these factors
influence the measurement result. Relax by sitting in an armchair or at a table 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 10mmHg
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.
• Ideally, you will be sitting at a table with both feet on the floor and your arm resting on the table with the
cuff at heart level.

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 and reliable 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 flow away.

3.3C Fitting the Wide Range Cuff

a) Put the end of the cuff (with fastener) through the metal ring,
making the cuff a cylinder (ignore this step if your cuff is already
set up). Proper assembly allows the Velcro
b) Place the cuff with the monitor around your arm. When the cuff is
on your arm, the monitor should be facing towards you so you can
read the screen. Make sure the bottom edge of the cuff is about 1"
(2-3 cm) above the elbow joint. Adjust the cuff so that the brachial
artery mark is positioned over the brachial artery, which runs on
the inside of the arm (see Fig. B). The red material should be over
the brachial artery.
to match up properly.
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a)
b)