The CEO of medical device manufacturer Masimo, who is suing Apple for patent infringement, points out that ``Apple Watch's blood oxygen concentration measurement function is unreliable and should not be used.''

In the Apple Watch series of smart watches developed by Apple, some models are equipped with a `` Blood Oxygen Wellness App '' that can measure blood oxygen concentration. Medical device manufacturer Masimo is suing Apple for patent infringement on this feature, forcing Apple to stop selling the Apple Watch Series 9 and Apple Watch Ultra 2 , which were released in 2023. . Regarding the blood oxygen wellness app on the Apple Watch, Masimo's CEO has become a hot topic by saying, ``The Apple Watch's blood oxygen concentration measurement function is unreliable and should not be used.''

Masimo (MASI) CEO Says Users Better Off Without Apple's (AAPL) Pulse Oximeter - Bloomberg
https://www.bloomberg.com/news/articles/2024-01-18/masimo-ceo-says-users-are-better-off-without-apple-s-oxygen-tool

Masimo claims Apple Watch's blood oxygen feature is unreliable
https://9to5mac.com/2024/01/18/masimo-apple-watch-blood-oxygen/

As a result of Masimo's complaint, Apple has applied to regulatory authorities for a software redesign proposal to remove the Blood Oxygen Wellness app from Apple Watch Series 9 and Apple Watch Ultra 2, which has been approved by January 2024. Starting March 18th, we will resume selling Apple Watch Series 9 and Apple Watch Ultra 2 both online and in physical stores.

Sales of Apple Watch Series 9 and Apple Watch Ultra 2 are banned again in the United States, but Apple plans to remove the blood oxygen concentration measurement function and continue selling them - GIGAZINE

In an interview with Bloomberg, Masimo CEO Joe Chiani criticized the Blood Oxygen Wellness app for 'masquerading as a reliable medical pulse oximeter.' 'Apple is pretending what it's offering to consumers is a reliable medical pulse oximeter, when in fact it's not.' They criticize Apple, saying things like, ``I really wish the Watch didn't have the Blood Oxygen Wellness app,'' and ``Blood oxygen levels are useless unless they are continuously measured.''

The Apple Watch Blood Oxygen Wellness app is a feature added in 2020 and is also available on models such as Apple Watch Series 6, Apple Watch Series 7, Apple Watch Series 8, and Apple Watch Ultra. A study published by the University of São Paulo in 2021 compared the Apple Watch's Blood Oxygen Wellness app to a commercially available pulse oximeter, and found that the Apple Watch sometimes gave better readings, overall. It was concluded that it produces fairly accurate measurements.

Another study published in 2022 compared the Apple Watch's blood oxygen sensor to Masimo's Radical-7 pulse oximeter and concluded that the measurements were very similar. I am.

How to use such a blood oxygen wellness app is summarized in the article below.

Summary of how to use the ``Blood Oxygen Wellness App'' that can measure blood oxygen concentration with ``Apple Watch Series 6'' - GIGAZINE