**1. Introduction**

The difficult airway has been defined as "the clinical situation in which a conventionally trained anesthesiologist experiences difficulty with face mask ventilation or difficulty with tracheal intubation or both." Failure to assess or identify a difficult airway and not make an organized plan for the management of the airway may lead to a poor outcome. Assessment of the airway goes beyond bedside clinical tests and should emphasize the identification of problems during each step of airway

management [1]. This should involve the proper assessment of variations in anatomy, various airway pathologies, and the previous approach used in prior cases. These variable factors play decisive role in determining the success of any equipment or technique or adjunct used and most importantly incorporate the skill and knowledge of anesthetist about various techniques and equipment.
