- Google’s Pixel Watch 3 now has loss of pulse detection in the US
- The company has revealed how it created the function
- It’s about opportunistic detection and prevention of ignorant heart events
Google’s loss of pulse detection recently began to roll out to the United States after receiving the approval of the health authorities in February. Now, Google has revealed how it exactly created the life -saving feature and what makes it so important.
Google Pixel Watch 3 is the best Android smartwatch on the market due to its excellent performance, stylish design and decent battery life. At the launch, it was revealed with loss of heart rate detection that can warn relief services and spectators if the user suffers from a cardiac arrest.
Now, Google has revealed some of the behind the scenes that went into the feature of the pursuit of solving “a seemingly indispensable public health challenge.”
As Google notes, events outside the hospital cause cardiac arrest (OHCA) events millions of deaths all over the world, half to three -quarters of events are ignoring.
Per Google, “About half Of effortless OHCA victims receive no resuscitation because they exist too late and attempts at resuscitation are destined to be meaningless. “
OHCA and successful revival are about time. The chain of survival that ends with advanced care starts with access to relief or spectators who can provide CPR or manage treatment with a defibrillator. However, timely awareness that someone is experiencing OHCA is crucial.
Witnessing events have a 7.7x higher survival rate than unconscious events, and that is why loss of pulse detection is so important.
How Google Did Loss of Pulse Detection
Google says its loss of pulse detection is dependent on a multimodal algorithm using photoplethysmography (PPG), a process that uses light to measure the changes in blood volume along with accelerometer data from on board sensors.
There are several “gates” that need to be transferred because the events are so rare and false positive things are less than ideal.
Before an alarm goes out, there is data from the PPG sensor (usually used to monitor your heartbeat), a machine learning algorithm to check the transition from pulsating (with a heart rate) to pulseless and additional sensorcheck to confirm the absence of a weak heart rate using additional LEDs and photododes.
The whole thing is a very technical way of saying that your pixelur must be absolutely sure that your heart has stopped beating before you trigger an alarm, rather than warn because, for example, a user has taken their watch.
Google says it collaborated with heart electrophysiologists and their patients, including patients with planned testing of implanted heart fibrillators, where Google measured planned temporary cardiac arrest.
Google says the second vital aspect of developing the feature, other than accuracy, is responsibility. It further detailed the efforts it has done to minimize false positives, and also notes that skin color is not a barrier to the efficiency of the function.
Google also says the design is accountable to maximize battery life using data from sensors that would already be activated to trigger subsequent further control, rather than running a background monitoring system all the time.
The full blog is a fascinating insight and it is worth reading. As noted, there is now loss of pulse detection in the United States along with all the other territories already alive in, including the UK and 14 other European countries.
