"Humidification in the Intensive Care Unit" is a professional book that addresses the importance of adequate humidification of inhaled gases in intensive care medicine. In modern intensive care, humidification is a crucial aspect, as insufficient moisture can lead to serious complications. This book provides a comprehensive practical guide for healthcare professionals, covering both the theoretical foundations and the practical application of humidification devices. It begins with an examination of the physiological principles of humidification and then discusses current devices, taking into account factors that influence their performance as well as methods for evaluating their effectiveness. The book covers various scenarios, including mechanical and non-mechanical ventilation, and extensively addresses the topic of ventilator-associated pneumonia. Additional chapters discuss humidification after tracheostomies, the humidification of artificial airways during secretions management, and the measurement of inhaled gas temperature in ventilated newborns.