8
Wrist Watch Blood Pressure Monitor
measurement arm during the measurement. Use a cushion
for support if necessary.
•
If the wrist artery lies considerably lower (higher) than the
heart, an erroneously higher (lower) blood-pressure will be
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
respective arm, which can lead to false results. Correctly
executed blood-pressure measurements should therefore
first be repeated after a 5 minute pause or after the arm has
been held up in order to allow the accumulated blood to flow
away (after at least 3 minutes).
5.3. Fitting the cuff
1.
Remove all objects and
jewellery (e.g. wristwatch)
from the wrist in question.
2. Draw the cuff over the wrist.
3. The distance between the
cuff and the hand should be
approximately 10 mm.
4. Secure the cuff with the
Velcro fastener, so that it lies
comfortably and not too tight
whereby no space should remain between the cuff and the
wrist.
5. Lay the arm on a table, with the palm upwards. Support the
arm with a rest (cushion), so that the cuff rests at about the
same height as the heart. Take care, that the cuff lies free.
Remain so for 2 minutes sitting quietly, before beginning
with the measurement.
Welch Allyn
0.5 - 1.0 cm
1/4" - 1/2"