CPAP machines help people with trouble breathing, but they aren't made to replace ventilators. Here's how they compare.

Every night, millions of people stop breathing without knowing it. Not once, but sometimes hundreds of times. Their remedy? A mask, a hum and the steady whisper of pressurised air. It’s not glamorous, ...

"Since 2008, the president has disclosed his history with sleep apnea in thorough medical reports," White House spokesman Andrew Bates said Wednesday. "He used a CPAP machine last night, which is ...