If you have sleep apnea, you might use a CPAP machine to keep your upper airway open. It delivers a steady stream of air pressure through a mask worn over the nose to stop the soft tissues in the back of your throat from collapsing. This prevents an obstruction that can cause frequent pauses in breathing while you’re sleeping. Did you know a CPAP can be used for other purposes as well? Recently, the machines have played an influential role in treating patients with COVID-19.