Measurement Procedure; Common Sources Of Error - Wellue B02 Handbuch

Measurement Procedure

Note: You should always be seated and calm before and during
measurement.
Before 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 ten minutes before taking a measurement.
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 pressure changes during the course of the
as 20-40 mmHg.

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
25-30cm 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.
Cuff works Under the pressure range 0-300MMHG
The wide range rigid cuff is: 22 - 40 cm
Note: Only use approved cuffs!
•
A loose cuff or a sideways protruding air pocket causes false
measurement values.
•
With repeated measurements, blood accumulates in the
which can lead to false results. Consecutive blood pressure
11
Measurements should be repeated after a 1 minute pause or after
your arm has been held up in order to allow the accumulated blood
to flow away. If you decide to take your Averaging Mode
measurement again, be sure to wait at least one minute
Fitting the Cuff
Please refer to picture-06
A)
clothing from your upper arm.
B)
should be on the inside of your arm extending downward to your
hand. Make certain the cuff lies approximately
day, as much
cm) above the elbow. Important! The
(Artery Mark) must lie over the artery which runs down the inner
side of the arm.
C)
and loop closure together.
D)
cuff. You should be able to fit 2 fingers between your arm and the
cuff.
Measure your arm circumference if you are not sure of proper fit.
E)
height as your heart. Make sure the tube is not kinked.
F) Remain seated quietly for at least two minutes before you begin
the measurement.
arm,
The cuff is pre-formed for easier use. Remove tight or bulky
Wrap the cuff around your upper left arm. The rubber tube
To secure the cuff, wrap it around your arm and press the hook
There should be little free space between your arm and the
Cuffs that don't fit properly result in false measurement values.
Lay your arm on a table (palm upward) so the cuff is at the same
beforehand.
1/2" to 3/4" (1 to 2
on the edge of the cuff
12