How does CPAP work? The CPAP machine delivers a constant flow of air through tubing and a mask and into your airway. The CPAP machine creates enough pressure in your airway to hold the tissue open, so your airway doesn’t collapse. The soft, steady jet of air from the CPAP machine creates enough pressure to keep the airway open. Your sleep specialist will prescribe a particular CPAP pressure for you, based on ho
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