<unk>  therapy uses machines specifically designed to deliver a flow of air at a constant pressure.<unk>  machines possess a motor that pressurizes room temperature air and delivers it through a hose connected to a mask or tube worn by the patient. This constant stream of air opens and keeps the upper airway unobstructed during inhalation and exhalation. Some<unk>  machines have other features as well, such as heated humidifiers. The therapy is an alternative to<unk>  end-expiratory pressure (PEEP). Both modalities stent open the alveoli in the lungs and thus, recruit more of the lung surface area for ventilation, but, while PEEP refers to devices that impose<unk>  pressure only at the end of the exhalation,<unk>  devices apply<unk>  throughout the breathing cycle. Thus, the ventilator does not cycle during<unk> , no additional pressure greater than the level of<unk>  is provided, and patients must initiate all of their breaths.An example of a nasal mask for<unk> <unk>  setup for adults in a low resource setting Method of delivery of<unk>  Nasal<unk>  Nasal prongs or a nasal mask is the most common modality of treatment. Nasal prongs are placed directly in the person's nostrils. A nasal mask is a small mask that covers the nose. There are also nasal pillow masks which have a cushion at the base of the nostrils, and are considered the least invasive option.Frequently, nasal<unk>  is used for infants, although this use is controversial. Studies have shown nasal<unk>  reduces ventilator time, but an increased occurrence of pneumothorax also was prevalent. Nasopharyngeal<unk>  Nasopharyngeal<unk>  is administered by a tube that is placed through the person's nose and ends in the nasopharynx. This tube bypasses the nasal cavity in order to deliver the<unk>  farther down in the upper respiratory system. Face mask A full face mask over the mouth and nose is another approach for people who breathe out of their mouths when they sleep. Often, oral masks and naso-oral masks are used when nasal congestion or obstruction is an issue. Devices that combine nasal pressure with mandibular advancement devices (MAD) also exist. Example of a full face mask<unk>  Compliance A large portion of people do not adhere to the recommended method of<unk>  therapy, with more than 50% of people discontinuing use in the first year. A significant change in behaviour is required in order to commit to long-term use of<unk>  therapy and this can be difficult for many people. In addition, people with moderate to severe obstructive sleep apnea have a higher risk of concomitant symptoms such as anxiety and depression, which can make it more difficult to change their sleep habits and to use<unk>  on a regular basis. Educational and supportive approaches have been shown to help motivate people who need<unk>  therapy to use their devices more often.
Continuous positive airway pressure
Positive airway pressure
Airway clearance therapy
Oxygen therapy
Hyperinflation therapy
Mechanical ventilation
Intermittent positive pressure breathing
Pulmonary hygiene