الفهرس 
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Abstract
The current study is a prospective study evaluated twenty three surgically fit patients diagnosed with obstructive sleep apnea. The aim of this study was to compare and correlate the results of Video-fluoroscopy with fiberoptic-nasoendoscopic examination during the awake ”Muller’s maneuver” and during sleep induced with propofol for providing an ideal method in evaluating upper airway obstruction in surgically fit OSA patients for better selection of the suitable surgical maneuver. During Video-fluroscopic examination using Muller’s maneuver; Twenty two cases had multiple level airway collapse in upper airway collapse while one case had a single level collapse. Lateral Shape of upper airway lumen during Muller’s maneuver at the retropalatal level, twelve cases had funnel shaped airway collapse, while eleven cases had a tunnel shape. Upper airway dimensions at rest and during Muller’s maneuver were estimated in millimeters by videofluroscopy. At the lateral view, (soft palatal length, distance between soft palate and posterior pharyngeal wall, distance between tongue base and posterior pharyngeal wall, distance between tip of epiglottis and posterior pharyngeal wall) were estimated while the distance between lateral pharyngeal walls was estimated at the frontal view. Multi view videofluroscopy can provide an accurate preoperative airway assessment with close results to awake fiberoptic nasoendoscopy during Muller’s maneuver and relative close results to DISE. However; there was no single recorded change of the shape of collapse at any level between both techniques. Although videofluroscopy expose the patient to radiation, also it is a bidimentional technique of investigation, it is non invasive, easy applied, don’t require anesthesia or operating theater and for sure it’s a low cost technique suitable for developing countries. It also can provide extra data regarding the estimation of upper airway dimensions, number of structures involved in the collapse and a holistic view of the airway collapse either tunnel or funnel shaped, which serves the target of the surgery.