This book focuses on Flow-controlled Ventilation (FCV), the most recent innovation in the field of airway management and ventilation. In this book, the authors explain how ventilation through a straw-size or ultra-thin endotracheal tube is possible with FCV along with the clinical application of FCV in managing complex cases, particularly those presenting for head and neck surgery for a narrow airway diameter, totally obstructed airway and various cases of cannot intubate, cannot oxygenate situation.Readers will learn: the physical and physiological principles governing how FCV works; how to prepare and setup the FCV ventilators to be used with ultra-thin tube (outer diameter 4.4 mm and inner diameter 2.4 mm); identifying commonly encountered issues and troubleshooting; how to manage various cases of difficult airway encountered in various settings (prehospital or intra-operatively); how to tackle a Cannot intubate, Cannot oxygenate scenario in a simple way.The book is intended to be a reference guide that could be easily carried during the daily clinical work with the aim of providing a better healthcare and promoting patients safety.It is intended for healthcare providers working in various clinical settings including but not limited to intensivists, anaesthetists, pulmonary physicians, medical residents, medical students, medical fellows, anaesthesia residents, nurses, anaesthesia technical staff, respiratory therapists, certified registered nurses in anaesthesia, and paramedics.