This book analyses the basic rationale of noninvasive respiratory management in upper airways medical and perioperative disorders and key interactions and clinical implications. It offers key diagnostic tools to detect early and late failure of upper airway disorders whit a noninvasive approach. Furthermore, all medical and post-operative clinical indications of acute and chronic diseases in upper airway respiratory disorders and outcomes are summarized.The book can be considered unique from various perspectives: from the physiological and practical point of view as well as from the side of the therapeutic approach. As a matter of fact, from the physiological perspective, noninvasive mechanical ventilation has been shown to have several beneficial effects on the elasticity, musculature, and resistance of the upper and lower airways.