This short survey assesses the current attitude and practices of preoperative OSA management among endoscopic skull base surgeons. Approximate time needed to complete the survey is 2 minutes. Thank you for taking part in the survey. All questions pertain to ENDOSCOPIC skull base surgery (ESBS) ONLY1. I would define my clinical practice as follows: Academic center, surgical volume less than 50 cases per year, surgical experience of less than 5 years Academic center, surgical volume less than 50 cases per year, surgical experience of more than 5 years Academic center, surgical volume more than 50 cases per year, surgical experience of less than 5 years Academic center, surgical volume more than 50 cases per year, surgical experience of more than 5 years Private practice, surgical volume less than 50 cases per year, surgical experience of less than 5 years Private practice, surgical volume less than 50 cases per year, surgical experience of more than 5 years Private practice, surgical volume more than 50 cases per year, surgical experience of less than 5 years Private practice, surgical volume more than 50 cases per year, surgical experience of more than 5 years 2. Proportion of my ESBS patients that have suspected / confirmed obstructive sleep apnea (OSA) Do not know Less than 5% 5-10% 11-25% More than 25% 3. Proportion of my ESBS patients with suspected OSA that are advised PREOPERATIVE sleep study Do not know Less than 20% 21-50% 51-80% 81-100% 4. Do you have a PRE-OPERATIVE obstructive sleep apnea screening protocol for ESBS patients? Yes Working towards it No 5. For PRE-OPERATIVE OSA screening in my ESBS patients, I currently useUsuallyOccasionallyRarelyBody mass indexHistory taking (apnea, snoring, etc)Screening instruments (STOP-BANG etc.)Sleep StudyOtherPlease specify other 6. In ESBS, PREOPERATIVE knowledge about patientโs SLEEP APNEA STATUS and its SEVERITY has an effect on mySelect all that apply. Intra operative decision making on skull base reconstruction Postoperative monitoring including need for critical care Pulse oximetry monitoring in recovery Advice on hospital stay duration Level of concern for post-operative complications (cardiac, pulmonary, stroke, venous thrombosis) Advice on restarting CPAP Advice on non-CPAP treatment devices for OSA in post-operative period (if CPAP is withheld/never used) None of the above 7. PREOPERATIVE sleep study should ideally be done in all cases of suspected OSA undergoing ESBS Do not know I agree Somewhat agree Do not agree