Apple has been improving the functions that the smart watch has since it was put on the market. The new watches that have been presented from last 2015 to today, they have always added improvements in health aspects and this seems to continue to be the case in the next generation of the watch.
According to the medium 9to5Mac, Apple would be prepared to launch a new function on its smartwatch, in this case the blood oxygen detection. This is a function that we have been rumored for some time could reach the firm's watch and it seems clear that the new version of the watch or even through a software update will be seen very soon.
We do not really know if this feature could be activated by a new version of watchOS, but hopefully yes, as has happened with the implementation of "Noise" detection from the Apple Watch to warn us if we have been exposed to too loud noise for too long. Everything indicates that the blood oxygen saturation reader will be a new sensor, we will see what finally happens.
In 9to5Mac they also point to an improvement in the electrocardiogram function that we have active from the Series 4 to the Series 5. This function seems to be limited when heart rate is above 120ppm something that could be improved simply with a software revision in the next version of watchOS. Several novelties are expected for the next Apple Watch model and we also hope that the Series 4 and Series 5 will add as much new features as possible by updating the software, we will see where the users of these watches are left out when it is launched in a new system operational and the new watch this year.