Drug induced Sleep Endoscopy is a valuable examination in sleep disorder surgery for OSA patients. Before surgery I prefer to do a fibre optic naso-pharyngo-laryngoscopy to asses the anatomy and dynamic behavior of upper airway during sleep, induced by IV Propofol given by the anesthetist in OT.
Dynamic MR imaging can also accurately diagnose the cause and level of upper airway narrowing in patients with OSA. But I find Sleep endoscopy gives me more information to plan the multilevel surgery needed in OSA patients. Patients with lax epiglottis direct visual examination of the larynx is better during sleep endoscopy than in Dynamic MRI.
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