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1. Introduction
1.1. Features of the WA-77
Your blood pressure monitor WA-77, is a fully automatic, digital blood pressure measuring device
for use on the upper arm. This monitor enables very fast and reliable measurement of systolic and
diastolic blood pressure as well your pulse by use of oscillometric method.
This device, equipped with large LCD display & phonetic functions, is very convenient and easy to
visualize as well as hear the operational status and cuff pressure during or after a measurement.
This device is easy to use and is proven in clinical studies to provide excellent accuracy.
Please read through this instruction manual carefully before use and then keep it in a safe place. For fu-
rther questions on the subject of blood pressure and its measurement, please contact your doctor.
Attention!
1.2. Important information about self-measurement
Do not forget: self-measurement means Control, not diagnosis or treatment. Unusual values must
always be discussed with your doctor. Under no circumstances should you alter the dosages of
any drugs prescribed by your doctor.
The pulse display is not suitable for checking the frequency of heart pacemakers!
In cases of cardiac irregularity (Arrhythmia), measurements made with this instrument should only
be evaluated after consultation with the doctor.
Electromagnetic interference.
The device contains sensitive electronic components (Microcomputer). Therefore, avoid strong elec-
trical or electromagnetic fields in the direct vicinity of the device (e.g. mobile telephones, microwave
cookers). These can lead to temporary impairment of the measuring accuracy.
2. Important information on the subject of blood-pressure and its measurement
2.1. How does high/low blood-pressure arise?
The level of blood-pressure is determined in a part of the brain, the so-called circulatory centre, and
adapted to the respective situation by way of feedback via the nervous system.
To adjust the blood-pressure, the strength and frequency of the heart (Pulse), as well as the width of
circulatory blood vessels is altered. The latter is effected by way of fine muscles in the blood-vessel
walls.
