<unk> s <unk>  are devices used in mechanically ventilated patients intended to help prevent complications due to "drying of the respiratory mucosa, such as mucus plugging and endotracheal tube (ETT) occlusion."<unk> s are one type of commercial humidification system, which also include non-heated-wire humidifiers and<unk> ed-wire humidifiers.<unk> s have been in clinical use for over 30 years. An<unk>  cassette plays a central part of lung rehabilitation after a total laryngectomy.
Heat and moisture exchanger
Air purifier
Air ioniser
Nebulizer
Vacuum insulated evaporator
Respirometer
Membrane oxygenator
Hand sanitizer