Blood oxygen levels refer to the amount of oxygen circulating in the blood. Normal blood oxygen levels fall between 75 and 100 millimeters of mercury (mm Hg) on arterial blood gas (ABG) test results.

A new sensor could soon allow hospital patients' blood oxygen levels to be checked via their breath. The technology is claimed to be more reliable and less painful than existing traditional methods.

Monitoring your blood oxygen levels may not seem as exciting as step counting or be as obvious in its benefits as something like sleep tracking, but it's still a useful option for managing your health ...

Apple Watch excels in bringing health-intensive features to every user. One of the most notable capabilities that it can do is to measure your blood oxygen levels through its SpO2 sensor. Did you know ...

Dartmouth researchers have developed a cell phone-based tool that monitors tissue health by using a naturally occurring molecule to measure the oxygen level in cells. The tool could provide a simple ...

A dangerously low oxygen level—usually below 92%—can cause shortness of breath, confusion, chest pain, or fainting. It’s often triggered by lung or heart conditions like COPD, asthma, or heart ...

Taking a flight may be routine for some, but not much attention is paid to the physiological changes that take a toll on your ...

Apple is bringing blood oxygen monitoring back to some Apple Watch models after a US Customs ruling. It began pulling the feature in 2024, following a patent dispute with medtech company Masimo. An OS ...

One of the major selling points of Apple Watches in recent years has been the ability to test users’ blood oxygen levels. Unfortunately, ongoing litigation has prevented this feature from being ...

Apple removed all mentions of the blood oxygen feature from the Apple Watch's features overview page. Credit: Apple We knew it was coming, but now it's official: Apple Watch Series 9 and Ultra 2 no ...