The administration of dry gases during mechanical ventilation makes patients more susceptible/prone to complications, as damages to high respiratory tract mucous membrane, destruction of airway epithelium, airway obstruction and atelectasis. In severe cases, inspissation of airway secretions may cause occlusion of the endotracheal tube. It's advisable to use humidification and heating systems at circuit level, in order to avoid linked complications and to improve comfort during ventilation. Absolute humidity value would be at least 30 mgH20/I for passive humidifiers and 33-44 mgH2O/l for active ones. Humidification systems can be divided into passive systems, which operate passively by storing heat and moisture from the patient's exhaled gas and releasing it to the inhaled gas, and active systems, which provide moisture from outer and mixed systems. Literature does not provide any detail about which is assumed to be the best system; for patients who receive invasive mechanical ventilation it is recommended humidification; for NIV it is suggested active humidification instead of the passive method. Several researches underlined how different elements affect circuit humidity level and ventilation effectiveness (increase inspiratory pressures, room temperature, interface for NIV delivery, air leaks during ventilation): an effectiveness check is thereby essential to choose the suitable system. Furthermore, it is necessary to focus on humidification systems placement, especially during home-ventilation; in the matter of home-care ventilation, it is fundamental an adequate educational plan to manage correctly every humidification system.
|Translated title of the contribution||Humidification during mechanical ventilation: Practical aspects|
|Number of pages||6|
|Journal||Rassegna di Patologia dell'Apparato Respiratorio|
|Publication status||Published - Jun 2013|
ASJC Scopus subject areas
- Pathology and Forensic Medicine
- Pulmonary and Respiratory Medicine