We tested popular wideband O₂ controllers against lab-grade equipment to see how accurate their lambda readings really are ...

A few of the most important insights are heart rate variability (HRV), which describes the difference in time between the ...

Pulmonary function tests are a group of noninvasive breathing tests that measure how much air your lungs can hold, how quickly you can move air in and out and how efficiently your lungs transfer ...

By Dr. Liji Thomas, MD A major UK study shows that commonly used home pulse oximeters can overestimate oxygen levels in ...