The problem with CPAP is that it prevents full airway collapse and apneas very effectively, but often just converts them into subtler collapse ending with arous

The problem with CPAP is that it prevents full airway collapse and apneas very effectively, but often just converts them into subtler collapse ending with arousals. It also introduces its own disruption through expiratory resistance, reducing arterial CO2, patient-ventilator asynchrony if you're using any EPR or bilevel features, etc... bleh.