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ABOUT “BLOOD PRESSURE”
What is blood pressure?
The heart is a pump that circulates blood throughout your body. Blood is pumped
from the heart at a constant pressure into arteries. This pressure is called the
arterial blood pressure and represents, in general terms, your blood pressure. Blood
pressure is indicated by several kinds of pressures, including the systolic pressure
that occurs when the heart pumps blood, and the diastolic pressure that occurs
when blood returns to the heart.
Your blood pressure changes all the time.
Your blood pressure differs according to your age, gender and a range of other
factors. It is likely to be affected by your biorhythm during the day and by your
posture, physical activities, mental activities, level of stress and even by the air
temperature. The blood pressure of a healthy person generally varies within a day.
(Systolic) (Diastolic)
Artery
Left atrium
Left
ventricle
The artery wall
expands.
Contraction
Artery
Left atrium
Left
ventricle
Normal state is restored
to the artery wall.
Dilation
Systolic blood
pressure
Diastolic blood
pressure
Time of day
Blood pressure value (mmHg)
160
140
120
100
80
60
40
12 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7 8 9 10 11
Sleeping
(Blood pressure values measured at fi ve-minute intervals through the day)
● Bevan AT, Honour AJ, Stott FH. Clin Sci 1969;36:329–44.
[Example of blood pressure variations within a day]
Icon displayed Condition/Cause
Displayed during
measurement.
Lit Measurement is under way.
Blinking Pulse detected.
Displayed during
measurement.
“PUL Err” is displayed when the pulse
value is below 40 or above 181.
If any of the following marks is displayed, take the specifi ed action, then
repeat the operation.
Icon displayed Condition/Cause Corrective action
• Appears when the
blood-pressure could
not be measured
accurately.
Apply cuff properly and
measure again.
The pressure is
281 mmHg or higher.
If the pressure does not
automatically decline
during measurement,
immediately press the
“START/STOP” switch
and turn the unit off. Take
the measurement again.
Appears when the
batteries are running low.
Replace the batteries.
Detected problem in the
device.
Contact the vendor.
KEY TO DISPLAY ICONS