This functionality is designed to identify critical health emergencies by detecting the absence of a pulse and can automatically contact emergency services if the user is unresponsive. The feature is slated to roll out to U.S. devices by the end of March 2025.
The Loss of Pulse Detection operates by continuously monitoring the user's heart rate. Upon detecting a potential loss of pulse, the watch activates infrared and red lights to search for additional pulse signals and utilizes motion sensors to check for movement. An AI algorithm then analyzes these signals to confirm the condition. If no response or movement is detected, the device initiates a call to emergency services, providing the user's status and location.
This feature has been available in 14 European countries since September 2024. The recent FDA clearance enables its introduction to the US market, enhancing the Pixel Watch 3's suite of health and safety tools, which already includes Car Crash Detection, Fall Detection, Irregular Heart Rhythm Notifications, and an ECG app.
It's important to note that while Loss of Pulse Detection adds a significant layer of safety, it may not detect every instance of pulse loss and is not intended for users with preexisting heart conditions or those requiring continuous cardiac monitoring. The feature does not diagnose or treat medical conditions and is dependent on the device being charged and having adequate cellular connectivity.
The FDA's approval of this technology underscores the growing integration of advanced health monitoring features in consumer wearable devices, aiming to provide timely assistance during critical health events.