Citizen CH-453 Digital Blood Pressure Monitor

General Remarks

This section provides general information on blood pressure and its measurement. It emphasizes the importance of proper technique and understanding the factors that can influence readings.

Precautions for Use and Maintenance

• To deflate the cuff quickly, press the "START/STOP" switch.
• Ensure you select the correct cuff size for your arm circumference:
• Cuff (model: SCN-003): fits arm circumference 22-32 cm
• Large Cuff (model: SCL-005) [OPTION]: fits arm circumference 32-42 cm
• When attaching the cuff, position it so the blue marker is in the center of your arm, and the cuff hem is 1-2 cm (for standard cuff) or 2-3 cm (for large cuff) above your elbow.
• The monitor is intended for home use and is not a diagnostic device. Self-measurement is not a substitute for medical advice or treatment.
• Prepare for measurement by urinating and remaining still for 10-15 minutes prior to measurement. Avoid exercising, eating, drinking, or smoking before measurement as these can affect results.
• Measure blood pressure regularly at the same time each day, as it varies throughout the day.
• Do not overemphasize single readings; keep a record of variations for a complete picture.
• Emotional stress can cause blood pressure to rise.

Tips for Obtaining Accurate Measurements

• Take five or six deep breaths and relax before measuring. Tension can lead to invalid readings.
• Blood pressure can be elevated due to anxiety, lack of sleep, constipation, or recent physical activity or meals.
• Wrap the cuff snugly around your arm, allowing space for one finger between the cuff and your arm.
• Do not measure blood pressure after bathing, drinking, or smoking.
• Urinate before measuring if you feel the need.
• Measure in a room with a temperature around 20°C. Avoid extreme cold (below 10°C) or heat (above 40°C).
• Wait before measuring after consuming coffee or tea.
• Measure blood pressure while relaxed and still. Keep the cuff level with your heart and do not move or talk.
• Do not measure if the cuff has been on your arm for an extended period.
• If the Body Movement Indicator or Irregular Heartbeat (IHB) Indicator is displayed, relax and re-measure. Frequent IHB indication suggests consulting a doctor.

Blood Pressure Classification (WHO Standards)

The following graph provides a guide to blood pressure classifications:

The graph is a guide and not an exact measurement. The device is intended for adult use only.

Intended Use

This device is a non-invasive blood pressure monitor using the oscillometric method. It automatically measures systolic blood pressure (SYS), diastolic blood pressure (DIA), and pulse rate. It is intended for personal health monitoring at home under physician guidance and is not a diagnostic device. It is not intended for neonates, infants, or for automatic cycling measurements.

Measure your blood pressure at the same time each day.

Blood pressure changes constantly. Data gathered over a long period is more significant. Measure daily, ideally at the same time each day.

Precautions for Use

• Consult your physician before use if you have heart disease, high blood pressure, or other circulatory issues.
• If cuff pressure feels abnormal or you experience irregularities, press "START/STOP" to deflate, detach the cuff, or unplug the air hose, and consult your retailer.
• Discontinue use and consult your physician if measurements seem abnormal or make you feel unwell.
• Measurement may not be possible for individuals with a weak pulse or arrhythmia.
• Repeated measurements may cause congestion or swelling in some individuals. Allow at least 1 minute between measurements.
• Consult your physician before use if you have severe arm circulation problems.
• Measurement may be difficult for those with insufficient blood flow or frequent irregular heartbeats. Consult your physician.
• Do not wrap the cuff around an injured arm.
• Do not use the monitor if a drip (intravenous infusion) is inserted or blood transfusion is in progress in the arm, as this could cause injury.
• Do not use near flammable gases (e.g., anesthesia) or in enriched oxygen environments (e.g., hyperbaric chamber, oxygen tent) due to fire or explosion risk.
• Avoid using mobile phones near the monitor to prevent malfunction.
• Consult your physician if you use a cardiac pacemaker.
• Use the monitor only for measuring blood pressure.
• Use only authorized Citizen parts and accessories to avoid damage.
• Do not use on infants.
• Measurement may not be possible for individuals with common arrhythmias like premature beats or atrial fibrillation.

Maintenance Precautions

• Store the monitor away from direct sunlight, extreme temperatures (below -20°C or above 60°C), high humidity (over 95%), or excessive dust. Keep out of reach of children, pets, and pests.
• Do not drop or subject the monitor to shocks or vibration.
• Remove batteries if the monitor will be unused for an extended period.
• Do not attempt to disassemble the monitor.
• Do not bend the cuff or air hose excessively.
• Clean the monitor with a cloth moistened with sterilizing alcohol or neutral detergent, then wipe dry. Never use thinners or benzene.
• Clean the cuff with a moist cloth. Avoid hard rubbing to prevent air leaks. Ensure no water enters the air hose.

Warning

No modification of this device is allowed.

Symbols Explanation

• CE marking: Information for market inspectors in EU member countries.
• Type BF applied part: Indicates the part of the equipment that contacts the patient.
• Keep dry: Protect from moisture.
• Warning: Indicates potential hazards.
• Refer to instruction manual: Consult the manual before use.
• Appliance compliance WEEE directive: Indicates compliance with the Waste Electrical and Electronic Equipment Directive.
• Accumulators and battery packs: For separate collection.
• Manufacturer: Identifies the maker of the product.

The device is tested for EMC according to EN60601-1-2. Avoid use in high electromagnetic environments.

Nature and frequency of maintenance

Inspection every two years is recommended for proper function and performance.

Protect the nature environment

Dispose of batteries and the product according to national and/or local recycling regulations.

WEEE MARK

Do not mix this product with general household waste. Use separate collection systems for used electronics as per WEEE Directive (2002/96/EC) within the European Union.

Information for Users on Collection and Disposal of used Batteries

Used batteries should not be mixed with general household waste. Take them to applicable collection points for proper treatment, recovery, and recycling. Contact local authorities or the point of sale for disposal information.

Information on Disposal in other Countries outside the European Union

This symbol is valid only in the EU. For disposal outside the EU, contact local authorities or your dealer.

Note for the battery symbol

The symbol may be used with a chemical symbol, indicating compliance with directives for that chemical.

Reference European standard

The device complies with EN60601-1, EN1060-1, EN1060-3, EN1060-4.

Calibration

The device should be inspected every two years for correct functioning and accuracy. Contact a distributor.

Identification of Parts

Main Unit

The main unit features a display, START/STOP switch, MEMORY switch, and an air hose socket.

Cuff

The cuff includes an air hose, blue marker, and metal hoop for attachment.

Display

The display shows systolic and diastolic blood pressure, pulse rate, and various indicators:

• Memory icon (M)
• Body Movement Indicator (person with wavy lines)
• Irregular Heartbeat (IHB) Indicator (heart with exclamation mark)
• Battery icon (indicates battery status)
• No. (memory number)
• Pulse display

Loading the Batteries

1. Open the battery compartment cover by pressing the hook and pulling the cover.
2. Insert four AA batteries, observing the positive (⊕) and negative (⊖) terminal markings.
3. Close the battery cover by fitting the lugs into the recesses and securing the hook.

Removing the Batteries

• Replace batteries when the ⏹ icon is displayed or the display is blank. Change all four batteries at once.
• Memory data is erased when batteries are removed. Note stored data before replacement.
• Do not use rechargeable batteries.
• Do not mix alkaline (LR6) and manganese (R6P) batteries.
• Included batteries are for demonstration; actual battery life may vary.
• Dispose of used batteries according to local regulations.

Measuring Your Blood Pressure

Attaching the Cuff

1. Unroll the cuff and thread the end through the metal hoop, ensuring the hook-and-loop fastener side is outward.
2. Wrap the cuff around your bare arm (or over light underwear) with the blue marker towards the palm side.
3. Position the cuff so the blue marker is centered on your arm, and the cuff hem is 1-2 cm (standard) or 2-3 cm (large) above your elbow. Remove heavy clothing.
4. Secure the cuff snugly with the hook-and-loop fastener. The fit is correct if a finger can slide between the cuff and arm.
5. Place your arm on a table, ensuring the cuff is level with your heart. Relax your arm with your palm facing upward.

Starting the Measurement

1. Plug the air hose connector firmly into the air hose socket on the main unit.
2. Press the START/STOP switch (blue button).
3. The monitor will perform an initial display check, then automatically pressurize the cuff.
4. Measurement begins automatically after pressurization. The monitor may repressurize if insufficient pressure is detected.
5. A pulse icon (❤️) blinks with each pulse detection.
6. Upon completion, the cuff deflates, and results (systolic/diastolic pressure, pulse) are displayed alternately. Measurements are stored automatically if no errors occur.

Indicators During Measurement

• Body Movement Indicator: Appears if movement during measurement causes significant pressure changes. Re-measure if this indicator is shown.
• Irregular Heartbeat (IHB) Indicator: Appears if an irregular heartbeat is detected. An irregular heartbeat is defined as a variation of ±25% from the average of 5 heartbeat intervals. If the IHB indicator appears frequently, consult a doctor.

Finishing Measurement

• Press the "START/STOP" switch to turn off the monitor.
• To stop measurement mid-process, press "START/STOP" to deflate the cuff.

Manual Pressurization

For expected systolic pressures over 200 mmHg, use manual pressurization. Press and hold the "START/STOP" switch until the desired pressure (approx. 40 mmHg above expected systolic) is reached, then release. The upper limit is 280 mmHg.

Automatic Power Off Feature

The monitor automatically turns off after 3 minutes of inactivity if the "START/STOP" switch is not pressed.

Tips for Obtaining Accurate Measurements

Measure in the same posture at the same time daily for consistent results, as blood pressure varies with posture, time of day, and other factors.

Taking measurements while sitting

Place your arm on a table, forearm extended, cuff level with your heart. Keep your hand open, palm up, fingers relaxed. Remain still and do not talk during measurement.

Measurement in a reclining posture

Lie facing upwards, arm extended, palm up, fingers relaxed. Relax your body and arm. Do not move or talk during measurement.

Using the Right Arm

Blood pressure may differ between arms by up to 10 mmHg. Measure on the same arm each day for consistency.

Calling Up the Data Stored in Memory

The monitor can store up to 90 measurement results. Data is stored automatically if no errors occur during measurement.

How to Call Up the Data

1. Press the "MEMORY" switch (M).
2. The display may show "3A" and the average value (if 2 or more measurements are stored).
3. Press the "MEMORY" switch again to view the latest stored measurement (memory number "1").
4. Subsequent presses of the "MEMORY" switch will display earlier measurements (memory number "2", "3", etc.).
5. Data is numbered sequentially, with "1" being the most recent.
6. Pressing and holding the "MEMORY" switch allows fast-forwarding through the data numbers.
7. To erase all data, remove the batteries.

Key to Display Icons

If error marks are displayed, take the specified action and repeat the operation:

About "Blood Pressure"

What is blood pressure?

Blood pressure is the force of circulating blood against artery walls. It's measured as systolic pressure (when the heart pumps) and diastolic pressure (when the heart rests between beats).

Your blood pressure changes all the time.

Blood pressure varies based on age, gender, biorhythms, posture, activity, stress, and temperature. Healthy individuals experience daily fluctuations.

Example of blood pressure variations within a day:

Measurements taken at five-minute intervals throughout a day show significant variations, influenced by daily activities and rest periods.

Benefit of Measuring Blood Pressure at Home

Home measurements provide reliable data in a stable, relaxed condition. Physicians value this data. Measure at the same time daily and record variations. Always consult your physician for interpretation and treatment.

Before Requesting Repairs or Testing

Specifications

Note: Applied part for this device is the Cuff. Barometric pressure range: 105 kPa to 70 kPa. Altitude range: -300 m to 3000 m. Overall system accuracy meets EN1060-3 requirements. CITIZEN is a registered trademark of Citizen Holdings Co., Ltd., Japan. Design and specifications are subject to change without notice.