1. Introduction
This manual provides essential information for the safe and effective use of your OMRON HEM-6161 Wrist Blood Pressure Monitor. This device is designed for non-invasive measurement of systolic and diastolic blood pressure for home health management. Please read this manual thoroughly before use and keep it for future reference.

Image 1.1: OMRON HEM-6161 Wrist Blood Pressure Monitor. This image shows the compact design of the blood pressure monitor with its wrist cuff.
2. Important Safety Information
To ensure safe operation and accurate measurements, observe the following contraindications and precautions:
2.1. Contraindications / Prohibitions
- Self-diagnosis or treatment based on self-diagnosis of measurement results: This may lead to a worsening of symptoms. Always consult a healthcare professional.
- Measurement on an injured or treated arm: This may lead to a worsening of symptoms.
- Measurement on an arm undergoing intravenous drip or blood transfusion: This may lead to a worsening of symptoms.
- Use near flammable or combustible gases: This may cause ignition, fire, or explosion.
- Use beyond the service life: This may result in incorrect measurements.
- Use by an unspecified number of people in medical institutions or public places: This may cause accidents or problems.
2.2. Precautions for Use
- Individuals with severe blood disorders or blood diseases should use this device only under the guidance of a physician.
- Temporary internal bleeding may occur due to cuff compression.
- Do not use on infants or individuals who cannot express themselves.
- Do not use for purposes other than blood pressure measurement.
- Do not disassemble or modify the main unit or the dedicated cuff.
- Insert batteries with correct polarity (⊕⊖).
- Use only the specified batteries.
- Remove batteries when the device will not be used for a long period.
3. Product Overview and Contents
The OMRON HEM-6161 is a compact wrist blood pressure monitor designed for ease of use and portability. It records up to 30 measurements.
3.1. Package Contents
Verify that all items are present in the package:
- Main Unit (OMRON HEM-6161)
- Dedicated Wrist Cuff
- Storage Case
- AAA Alkaline Batteries (2 pcs for trial use)
- Instruction Manual (this document)

Image 3.1: Package contents including the main unit, cuff, storage case, and batteries.
4. Setup
4.1. Battery Installation
- Open the battery compartment cover on the back of the main unit.
- Insert two AAA alkaline batteries, ensuring the correct polarity (⊕⊖) as indicated inside the compartment.
- Close the battery compartment cover securely.
The device is now ready for use.
5. Operating Instructions
Follow these steps for accurate blood pressure measurement:
5.1. Applying the Wrist Cuff
- Sit in a comfortable position with your feet flat on the floor.
- Wrap the cuff around your left wrist, approximately 1-2 cm above your wrist joint. Ensure the display faces upwards.
- Tighten the cuff so it is snug but not uncomfortably tight. There should be enough space to insert one finger between the cuff and your wrist.

Image 5.1: This image illustrates how to correctly apply the wrist cuff and initiate a measurement by pressing the start button.
5.2. Proper Measurement Position
For accurate readings, it is crucial to position your wrist at heart level during measurement.
- Rest your elbow on a table and raise your wrist so the monitor is at the same height as your heart.
- Keep your body still and avoid talking during the measurement.

Image 5.2: This diagram shows the importance of aligning the wrist blood pressure monitor with heart level for accurate readings. Incorrect positions (too low or too high) are also depicted.
5.3. Starting Measurement
- Press the START/STOP button. The cuff will begin to inflate automatically.
- Remain still and quiet until the measurement is complete and the results are displayed.
- The monitor will display your systolic pressure, diastolic pressure, and pulse rate.

Image 5.3: A user demonstrating the measurement process with the OMRON HEM-6161 on their wrist.
6. Understanding Your Readings
6.1. Irregular Heartbeat Detection
This monitor can detect irregular heartbeats during measurement. If an irregular heartbeat is detected, a specific icon will appear on the display after the measurement. If this icon appears frequently, consult your physician.

Image 6.1: Icon indicating the detection of an irregular heartbeat.
7. Specifications
| Feature | Specification |
|---|---|
| Product Name | OMRON Wrist Blood Pressure Monitor HEM-6161 |
| General Name | Automatic Electronic Blood Pressure Monitor |
| External Dimensions | Approx. 84 (width) × 62 (height) × 21 (depth) mm (excluding cuff) |
| Weight | Approx. 85 g (excluding batteries) |
| Operating Environment | +10 to +40°C / 15 to 90% RH (non-condensing) / 800 to 1060 hPa |
| Applicable Wrist Circumference | 13.5 to 21.5 cm |
| Power Supply | Two AAA alkaline batteries (DC 3 V 3.0 W) |
| Protection against Electric Shock | Internally powered equipment, Type BF applied part (cuff) |
| IP Protection Rating | IP22 |
| Measurement Error (Clinical) | Mean error with auscultatory method: within ± 5 mmHg; Standard deviation: within 8 mmHg |
| Pressure Display Error | Pressure range 0 to 299 mmHg: within ± 3 mmHg |
| Rapid Deflation Time | From 260 mmHg to 15 mmHg: 10 seconds or less |
| Reproducibility of Measurement | 3 mmHg or less |
| Maximum Cuff Pressure | 299 mmHg |

Image 7.1: The OMRON HEM-6161 monitor displaying its physical dimensions and wrist circumference range.
8. Maintenance
To ensure the longevity and accuracy of your blood pressure monitor, follow these general maintenance guidelines:
- Clean the monitor and cuff with a soft, dry cloth. Do not use abrasive cleaners or immerse the device in water.
- Store the device in its protective case when not in use to prevent damage.
- Avoid exposing the device to extreme temperatures, humidity, direct sunlight, or strong vibrations.
- Replace batteries promptly when the low battery indicator appears.
9. Troubleshooting
If you encounter issues with your blood pressure monitor, try the following general troubleshooting steps:
- No display or device does not turn on: Check battery installation and ensure correct polarity. Replace batteries if they are old or depleted.
- Inaccurate readings: Ensure the cuff is applied correctly and snugly. Verify your wrist is at heart level during measurement. Avoid movement or talking during measurement.
- Cuff does not inflate or inflates incorrectly: Check for any kinks in the cuff tubing (if applicable, though this is a wrist unit). Ensure the cuff is properly attached to the main unit.
If problems persist after attempting these steps, please contact OMRON Customer Service.
10. Warranty and Support
Your OMRON HEM-6161 Wrist Blood Pressure Monitor comes with a manufacturer's warranty of 1 year.
10.1. Manufacturer and Distributor Information
Manufacturer/Distributor: OMRON Healthcare Co., Ltd.
10.2. Customer Service
For inquiries or support, please contact OMRON Customer Service Center.
Phone: 0120-30-6606
Service hours: 9:00 - 17:00 (excluding Saturdays, Sundays, national holidays, and New Year holidays)
Before contacting, please have the following information ready:
- Product model (HEM-6161)
- Manufacturing number (if available)
- Date and place of purchase
- Description of the issue (e.g., no display, abnormal display)

Image 10.1: Contact details for OMRON Customer Service, including phone number and operating hours.