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Disclaimer: Due to health regulations and clearances, some ScanWatch features may not be available or may not have clinical validation in your region. Learn more.

The Respiratory Scan will measure your heart rate, respiratory rate and oxygen saturation level throughout the night to provide a complete map of your night.


How does it work?

ScanWatch employs a multitude of sensors to scan your night. It uses its PPG (photoplethysmography) sensor to continuously measure heart rate and heart rhythm, breathing rate and respiratory effort, and oxygen saturation (SpO2). It also uses an accelerometer to monitor your actigraphy (rest and activity cycles). Consequently, ScanWatch can detect episodes of breathing disturbances during your sleep thanks to our exclusive algorithm developed with sleep experts.


  • ScanWatch uses green LED lights to take measurements. It is possible for you to notice it if your wristband is worn loose.
  • During a Respiratory Scan, LED lights will be continuously on. Otherwise, LED lights are on at the most for a minute every ten minutes.
  • If the sensor remains constantly on, even when no measurement is launched nor scheduled, resetting the watch by pressing and holding the button for 20 seconds should resolve the problem.

What are breathing disturbances?

During sleep, it is possible to experience interruptions in breathing, and you may not remember it in the morning. Paused breathing during sleep is not uncommon, and it’s often totally normal to have them a few times during the night, and a few pauses won’t have any noticeable impact on one’s sleep, health, and daily life. But when breathing problems occur too many times during sleep, they can be bad for your health.

Breathing disturbances can be a symptom of sleep apnea, a serious yet under-diagnosed condition. Clinical studies are currently underway to obtain medical certification for sleep apnea detection via ScanWatch. The study consists of comparing ScanWatch results with those obtained by a polysomnography device analyzed by a sleep physician.

When activating the Respiratory Scan, you will be able to choose between three types of experiences:

  • Automatic (recommended): Based on the results of the first night, ScanWatch will repeat the recording when necessary. It will notify you the day before and ask if you want to reschedule later. This frequency is recommended by doctors to get the best results from this feature. Note that the battery should be above 10% to launch the series of measurements.
  • Off: No Respiratory Scan will be launched.
  • Always on: A Respiratory Scan will be completed every night, and you will get the results every morning. Note that your battery life will be seriously reduced if using this mode.



Understanding my results

ScanWatch provides three categories to grade the severity of breathing disturbances:

  • Few : A few breathing disturbances were detected on the last tracked night.
  • Moderate : A moderate amount of breathing disturbances were detected on the last tracked night, which may be a sign of sleep apnea.
  • High : A high volume of breathing disturbances were detected on the last tracked night, which may be a sign of sleep apnea.
  • Graph: The evolution of the breathing disturbances detected during the last night is transcribed in a graph. A color code makes it possible to understand the severity of possible episodes, in the case of moderate to severe disturbances.

Medical advice should be sought if you experience moderate or severe breathing disturbances, or if you experience symptoms and have concerns. ScanWatch data can be read and interpreted by health professionals.

Understanding the Automatic measurement frequency

Based on your first Respiratory Scan result, the feature will implement a batch of scans. The batch consists in one to three Respiratory Scans in a row. The first scan of the batch is by default scheduled for the next sleep. You can postpone it if you want to.

Each scan of the batch will occur on a specific time according to the results of the previous scan:

  • Low breathing disturbance : the batch ends
  • Medium breathing disturbance : the batch continues for the next sleep
  • High breathing disturbance : the batch continues for the two next sleeps

The next batch will occur according to the most severe scan result of the previous batch:

  • Low breathing disturbance : the next batch will occur in three months
  • Medium breathing disturbance : the next batch will occur in three months
  • High breathing disturbance : the next batch will occur in one month

Note: if the Respiratory Scan cannot be performed or completed, another one will be automatically scheduled for the next week. You will be reminded of the process with a notification.

Sharing my results

You can find each night's scan record and history in the Health Mate app, and you can easily share it as a PDF with a doctor or a healthcare professional. This can help you share any breathing disturbances, which may be a symptom of sleep apnea, or share any other abnormalities or concerns you may be experiencing.

  • Notes:
    The Respiratory Scan functionality will impact the battery life of the watch.
  • When the Respiratory Scan is activated, a moon icon appears under the time on the screen of the watch.
  • ScanWatch is not intended to diagnose apneic episodes or assist with a diagnosis. Please seek medical advice if you need a personal sleep apnea diagnosis.
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