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Explanation of display and symbols
a.  Systolic pressure
b.  Diastolic pressure
c.  Pulse
d.  Symbol for new
measurement
e.  Symbol for pulse
measurement
f.  Symbol for emptying of
cuff
g.  Battery symbol
ABOUT BLOOD PRESSURE
What is blood pressure?
When the heart pumps blood around the body, the
blood exerts pressure on the walls of the blood
vessels. This is known as blood pressure.
Blood pressure is different in different parts of the
body and depends on the pulse, how elastic the
blood vessels are and how thick the blood is.
The pressure that can be measured when the heart
pumps out into the body is known as systolic blood
pressure. The pressure that can be measured when
blood runs back from the body towards the heart is
known as diastolic blood pressure.
The two types of blood pressure are usually given
together, with the systolic blood pressure always
given first. If the blood pressure is shown as 
“20/70” (pronounced “20 over 70”), it means that
the systolic blood pressure is 20 and the diastolic
pressure is 70.
The reading unit for blood pressure is mmHg
(millimetres of mercury).
Why does blood pressure vary?
Blood pressure varies throughout the day and over
a person’s life. Many different factors affect your
blood pressure, something you should be aware of
when taking your blood pressure. For instance, be
aware of the following:
•  Blood pressure is higher during the day than at
night.
•  Blood pressure increases slightly after you have
just eaten. A lot of salt in food can also increase
blood pressure.
•  Light exercise (e.g. walking and jogging) causes
the systolic blood pressure to rise slightly, while
hard exercise will cause it to rise dramatically.
However, it will fall again when the body
relaxes. A lack of exercise raises blood pressure
permanently.
•  Blood pressure can increase if you are excited,
stressed or tense.
•  Sudden climatic changes can cause blood
pressure to rise.
•  The systolic pressure increases with age.
•  Women have a greater risk of increased blood
pressure after the menopause.
•  Insufficient sleep, smoking, obesity, alcohol and 
certain illnesses cause blood pressure to rise.
•  Bathing and toilet visits may cause blood
pressure to rise.
•  If the cuff is too loose or too tight or not level
with the heart, the measured blood pressure
may be lower than the actual blood pressure.
When is my blood pressure too high or too low?
High blood pressure is also called hypertension.
Low blood pressure is also called hypotension.
The table below provides general guidelines for
when your blood pressure is too high or too low.
You should always consult your doctor for exact
readings.
Range Systolic
Diastolic
Very high blood
pressure (hypertension)
High normal
Normal
Erittäin matala Very 
low blood pressure
(hypotension)
> 40 mmHg > 90 mmHg
30-39 mmHg 85-89 mmHg
9-29 mmHg 5-84 mmHg
< 90 mmHg < 50 mmHg
630015_IM.indd   24
2008-7-2   16:06:30