Citizen CH-618 User manual

DIGITAL BLOOD PRESSURE MONITOR
• Design and specifications are subject to change without notice.
• CITIZEN is a registered trademark of Citizen Watch Co., Ltd. Japan.
6-1-12, Tanashi-cho, Nishi-Tokyo-shi,
Tokyo 188-8511, Japan
E-mail: [e-mail]
http://www.citizen-systems.co.jp/
1901

Contents
................
01....... Blood Pressure Monitor Intended Use
02....... 1. What is blood pressure ?
02....... 2. Why is it useful to measure blood
pressure at home ?
.......... A. WHO blood pressure classications
.......... B. Variations in blood pressure
05....... 3. Important information before use of the
device
08....... 4. Device description
.......... A. Name of the parts
.......... B. Description of display symbols
10....... 5. Changing Batteries
11....... 6. Attaching pressure cuff
12....... 7. Correct measurement position
A

Contents
................
13....... 8. Symbol Dinitions.
15....... 9. How to measure.
.......... A. Inserting batteries in position.
.......... B. Setting date and time.
.......... C. Steps to take blood pressure
measurement.
.......... D. Storing recalling and erasing
measurement data.
.......... E. To change batteries.
19....... 10. Maintenance.
20....... 11. Safe-keeping.
20....... 12. To prevent malfunction.
21....... 13. Warning.
22....... 14. Specications.
B

1
MEDICAL DISCLAIMER
This manual and product are not meant to be a
substitute for advice provided by your doctor or other
medical professional.
You are not to use the information contained herein,
or this product for diagnosing or treating a health
problem or prescribing any medication. If you have or
suspect that you have a medical problem, promptly
consult your healthcare provider.
Measures human's Systolic blood pressure, Diastolic blood
pressure and pulse on wrist by oscillometric measurement
method.
The device is designed for home use and recommended for
use by adults aged 18 years and older with wrist circumference
ranging 135 ~ 195 mm (5.3~7.7 inch).
Blood Pressure Monitor Intended Use:

2
Blood pressure is a measurement of the force of blood owing
against the walls of the arteries. Arterial blood pressure is
constantly changing during the course of the cardiac cycle. The
highest pressure in the cycle is called the systolic blood pressure,
the lowest is the diastolic blood pressure. Both pressure readings,
the systolic and the diastolic are necessary to enable a physician
to evaluate the status of a patient's blood pressure. Many factors
such as physical activity, anxiety or the time of day, can inuence
your blood pressure. Blood pressure is typically low in the
morning and increases from the afternoon to the evening. It is on
average lower in the summer and higher in the winter.
1. What is blood pressure ?
Having one's blood pressure measured by a doctor in a hospital or
a clinic, and a group health checks, tend to stimulate nervousness
in the subject and may even create high blood pressure.
2. Why is it useful to measure blood pressure
at home ?
Medical practitioners generally recommend the “Rule of 3”, where
you are encouraged to take your blood pressure three times in a
row (at 1 minute interval), three times a day for three days. After
three days you can average all the results and this will give you
an accurate idea of what your blood pressure really is.

3
Also varies blood pressure in accordance with a variety of
conditions and so judgment is not possible on the basis of a single
measurement.
The blood pressure measured rst thing in the morning after getting
up, before taking any food and with the subject still, is known as the
fundamental blood pressure. In practice it is rather difcult to record
the fundamental blood pressure, but to come as near as possible
to measuring the blood pressure in an environment that is close
to this, is why it is useful to take the measurement at home.
A. WHO blood pressure classications
Standards for assessment
of high or low blood
pressure without regard to
age, have been established
by the World Health
Organization (WHO), as
shown in the chart. * Figure No.1
This chart is intended to be used as a guide in understanding
noninvasive blood pressure measurements. Please consult with
your physician for proper diagnosis.

4
B. Variations in blood pressure
The graph below illustrated the variations in blood pressure over
a whole day with measurement taken every ve minutes.
The thick line represents sleep. The rise in blood pressure at 4
PM (A in the graph) and 12 PM (B in the graph) correspond to an
attack of pain.
* Figure No.2
Individual blood pressures vary greatly both on a daily and a
seasonal basis. These variations are even more pronounced in
hyper tense patients. Normally the blood pressure rises while at
work and is at its lowest during sleeping period.
(Hyper tense: means a person who has high blood pressure
symptom.)
(Direct arterial pressure recording in unrestricted
man. Beven, Honour & Stott: Clin. Sci. 36:329.
1969)

5
Please rest for at least 5~10 minutes before taking the
measurement.
To allow your blood vessels to return to the condition prior to
taking the measurement, please wait at least 3~5 minutes
between measurements. You may need to adjust the wait time
according to your personal physiological situation.
If you have one of the circulatory problems as arteriosclerosis,
diabetes, liver disease, kidney disease, severe hypertension,
peripheral circulation and medical problem, please consult
your doctor or healthcare professional before using the device.
Wait 30 ~ 45 minutes before measurement if you’ve just
consumed caffeinated beverages or smoked cigarettes.
Blood pressure measurements should be interpreted by a
physician or trained health professional who is familiar with
your medical history. By using the unit regularly and recording
the results for your physician to interpret, you keep your
physician informed of the continuing trends in your blood
pressure.
Wind the cuff snugly around your wrist and the cuff must be at
the same level as your heart.
3. Important information before use of the device
* Do not use this manual and product as a substitute for
advice, diagnosing or treating a health problem or prescribing
any medication by your doctor.
* The device is not suitable for clinical use.
* This monitor is not intended for use in the MR environment.

6
Do not vibrate the unit during measurement, or the proper
measurement will not be achieved.
Perform measurement quietly in a relaxed position.
Do not wind the cuff over jacket or sweater sleeve, or
measurement cannot be done.
Keep in mind, that blood pressure naturally varies from time to
time throughout the day and also is affected by lots of different
factors such as smoking, alcohol consumption, medication and
physical activity.
People with a condition that causes circulatory problems
(diabetes, kidney disease, arteriosclerosis or poor peripheral
circulation) may get lower readings with this monitor that with a
blood pressure monitor that is used on the upper arm. Please
consult your physician to determine if your wrist blood pressure
accurately reects your actual blood pressure.
Blood pressure measurement determine with the unit are
equivalent to those obtained by a trained observer using
the cuff / stethoscope auscultation method. Within the limits
prescribed by the Standard of EN 1060-4.
We recommend you using the same wrist (preferably the left
wrist) and measuring around the same time each day.
Perform measurements in a quiet and relaxed environment at
room temperature.
This product is not suitable for:
Pregnant women
People with arrhythmias
Undergoing intravenous injection on any limb
Currently in a dialysis treatment
In pre-eclampsia condition