Oregon Scientific BPW810 User Manual page 7

Why measure your blood pressure?
Blood pressure measurement can highly reflect one's
health condition. High blood pressure is potentially
linked to serious illnesses such as stroke, heart
disease and kidney failure.
Since there is no symptom most of the time, many
hypertensive people do not realize they are at risk
until their health is seriously threatened.
What is the standard blood pressure
classification?
Figure 3 illustrates the blood pressure classification
mode by World Health Organizatio (WHO) and
International Society of Hypertension(ISH) in 1999.
Grade 3 hypertension(severe)
110
Grade 2 hypertension(moderate)
100
95 Grade 1 hypertension(mild)
Subgroup:borderline
90
High-normal Blood Pressure
85
Normal Blood Pressure
80
Optimal Blood
Pressure
120 130 140
systolic blood pressure(mmHg)
Reference material: 1999 World Health Organization-
International Society of Hypertension Guidelines for the
management of hypertension, Journal of Hypertension,
1999, 17(2): 151-183.
NOTE
•
•
150 160 170 180
6
Blood pressure is considered high when either the
diastolic or systolic blood pressure value exceeds
the normal range. When a patient's systolic and
diastolic blood pressures fall into different
categories, the higher category should apply.
Only a physician can tell you your normal blood
pressure range and the point at which you are at
risk. Consult your physician to obtain these values.
If the measurements taken with these products fall
outside the range, consult your physician.
Why does my blood pressure fluctuate throughout
the day?
Individual blood pressure varies greatly both on a daily
and a seasonal or temperature basis. These variations
may be more pronounced in hypertensive patients.
Normally the blood pressure rises while at work and is
at its lowest during sleep.
The graph below illustrates the variations over a single
day with measurement taken every 5 minutes. The
thick line represents sleep time. The rises in blood
pressure at 4PM (A in the graph) and 12AM (B in the
graph) correspond to an attack of pain and sexual
intercourse (Beven, Honour & Stott, Clin. Sci. 36:329,
1969).