초록 close

Background and Objectives:The upper airway caliber shows rhythmic changes according to the respiratory cycle. The dyna-mic imaging technique is needed to demonstrate nonfixed oropharyngeal obstruction in patients with snoring and/or obstructive from the dynamic view of the oropharynx and to estimate the usefulnes of electron beam tomography (EBT) in the snoring and/or obstructive sleep apnea patients. Materials and Method:The upper airway was scanned in 18 patients with snoring by using EBT while awake, asleep, pre and post UPPP (six patients), and pre and post oral appliance (seven patients) during at least two full respiratory cycles. Results:The oropharyngeal stenosis and collapsibility were increased during slep, especialy in the minimum cross sectional area level. In most cases, the sites of stenosis of wakefulness and slep did not coincide. The degre of stenosis as well as collapsibility of the oropharynx were reduced after UPPP and oral appliance. Conclusion:The dynamic study during sleep is needed to evaluate slep induced airway disease. EBT has the potential to provide information quickly and non-invasively on upper airway dynamics and has certain definite advantages over conventional studies. (Korean J Otolaryngol 2003 ;46 :120-5)