Patient: How are you, doctor? Three years ago, he underwent surgery to remove an enlarged inferior turbinate due to sleep apnea, recovered well after surgery, lost weight to 160 (original 190) and went home with ResMed ventilator. I would like to thank you again for your reply. Zhang Xiaowen, Department of Otorhinolaryngology, The First Affiliated Hospital of Guangzhou Medical College: From the information you provided: 1) nasal turbinate hypertrophy surgery is related to your weight loss and improvement of sleep breathing disease symptoms, but probably weight loss is more related because 2) weight loss from 190 to 160, sleep breathing disease symptoms improved well after surgery, and then 160 rose to 180 drowsiness is worse than before, probably weight gain is an important factor in your morbidity. Important factors. Treatment suggestions: 1) Weight loss is definitely the most important; 2) Ask ResMed ventilator company and experts to find out the reason of mechanical ineffectiveness and whether it is necessary to redeploy; 3) Clarify the site of upper airway obstruction, consider surgery to lift the obstruction, and definitely sequential treatment after surgery. My sequential treatment method is still in the summary stage, you can provide reference when you need. Thank you!