Patient recruitment, intervention and follow-up
hypopneas
Portable PSG was performed using a 10-channel portable PSG device (Embletta X100; Embla, Broomfield, CO). The PSG was obtained preoperatively (preop) at home and on postoperatively (postop) on N 2 [Apneas were defined as a reduction in airflow from intranasal pressure of at least 90% for 10 s or longer, and hypopneas as reduction in flow of at least 30% for 10 s or longer, associated with ≥ 4% oxygen desaturation [