choose language

Deutsch Français 日本語 简体中文

Disclaimer: Due to regulation, different ScanWatch health features may be available in your region. Learn more.


Respiratory Scan will measure your heart rate, respiratory rate and movement throughout the night to provide complete maps of your sleep.

During sleep, it is possible to experience trouble breathing and you may not remember it in the morning. Oxygen saturation level drops can be a sign of these breathing disturbances. When the brain senses that oxygen levels are getting too low, it triggers a safety alarm signal, waking you up to take a breath. After falling back to sleep, this can occur repeatedly during the night, which doesn’t allow the body to recover properly.

ScanWatch embeds sensors to scan your night. It uses its PPG (photoplethysmography) sensor to measure your heart rate and heart rhythm, and your breathing rate and respiratory effort. It also uses an accelerometer to monitor your actigraphy (rest and activity cycles). Consequently, ScanWatch can monitor breathing disturbances episodes during your sleep.

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

  • Off: No Respiratory Scan will be launched.
  • Automatic: 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. We recommend this frequency to get the best results from this feature. Note that the battery should be above 10% to launch the series of measurements.
  • Always on: A Respiratory Scan will be completed every night, and you will get the results every morning. Your battery life might suffer from this mode.


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 nights of sleep

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.


Understanding my results

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

  • Low: Low breathing disturbances level on the last monitored night. 
  • Moderate: A moderate amount of breathing disturbances was detected on the last monitored night. 
  • High: A high volume of breathing disturbances was detected on the last monitored night.


Sharing my results

You can find each night scan record and history in the Health Mate app and you can easily share it with someone as a PDF. This can help assist you with maintaining your overall wellness.



  • 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.
  • To enable the Respiratory Scan feature, go to Health Mate > Devices > ScanWatch > Health Features > Respiratory Scan > then select the recurrence of your choice.
Was this article helpful?

Didn't find what you need? Here's how to get in touch.

Contact us
To preserve the Withings Forum as a place of kindness, mutual support, and interest for the products and services provided by Withings, I am committed to:
  • Be courteous and participate in the community with a spirit of friendliness and understanding
  • Respect all users on the forum
  • Avoid controversy or quarrel
  • Ensure that my messages do not infringe on the rights, reputation, image, or privacy of others
  • Avoid any and all discussions which contain insulting or discriminatory comments
  • Abide by the full terms and conditions outlined here

If you need assistance because of an issue which would not be resolved through troubleshooting, such as a product with physical damage, please contact our Support Team.