This is the most common endoscopic assessment performed in our clinic for patients suspected or diagnosed to have obstructive sleep aponea. This is a very well tolerated procedure, no hospitalization required and usually only a small amount of local anesthetics will needed to be applied to the nose and throat regions. A flexible videolaryngoscope will be introduced through the nostril to examine the whole nasal cavity for local pathology of the nose and possible sites of obstruction. Then the videoendoscope will examine the area of the velopharynx and hypopharynx. The whole procedure will be recorded and images captured.

Muller maneuver is a special technique that by consciously generating a negative pressure state within the upper airway, we would be able to estimate and possibly identify the possible locations and pattern of obstruction. However, since the patient is still fully conscious and is not in sleep, the accuracy of correctly identify the locations in about 80-85%

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