A sleep apnea implant sends a signal to move the tongue and keep the airway open while you sleep. To qualify for the implant, you must have a BMI of less than 35 and cannot tolerate a CPAP device. The ...

Tidal volume is the amount of air you move in and out of your lungs when breathing normally at rest. Spirometry is a test that measures your tidal volume by recording how much air you breathe in and ...