Tehran University of Medical Sciences Archives of Anesthesiology and Critical Care 2423-5849 12 4 2026 06 26 427 434 Zahid Hussain Khan Department of Anesthesiology and Critical Care, Tehran University of Medical Sciences, Tehran, Iran. Ramooz Hussain Khan Janan Dental Clinic, Andesheh County, Tehran, Iran. 2026 06 26 The human airway has since long remained a subject of debate and controversies; thus, to arrive at a subtle and acceptable solution, airway assessment tests, innovative techniques, and devices have been introduced to solve the enigma. Although human endeavors have made significant advances since time immemorial, the difficult airway still poses a major challenge even in the best of hands and the best centers. https://aacc.tums.ac.ir/index.php/aacc/article/view/1677