Continuous positive airway pressure (CPAP) and BiPAP (bi-level) therapy are used to treat sleep apnea. CPAP is the most ...

If a CPAP machine doesn’t help, bilevel positive airway pressure (BiPAP or BPAP) may help you tolerate the pressures. Sometimes, an oral appliance or surgery may be necessary. More on sleep apnea.

Instead, this device fits into or over the nostrils. It helps to maintain positive airway pressure and prevents airway collapse by creating resistance in a person’s exhalations (breaths out).