Which patient interface is associated with negative pressure ventilation?

Which patient interface is associated with negative pressure ventilation?

• A. Nasal mask
• B. Tracheostomy tube
• C. Chest cuirass
• D. Oral endotracheal tube

Answer: (C)

The chest cuirass is associated with negative pressure ventilation because it is designed to create a negative pressure environment around the thorax. This type of ventilation relies on the principle of creating a vacuum around the chest wall, which induces inhalation by drawing air into the lungs as the pressure inside the thoracic cavity decreases. This non-invasive method contrasts with positive pressure ventilation devices that push air into the lungs. Other interfaces, such as nasal masks, tracheostomy tubes, and oral endotracheal tubes, are used primarily in positive pressure ventilation systems. They function by delivering air into the lungs through a conduit but do not create the negative pressure necessary for the distinct mode of negative pressure ventilation. Hence, the chest cuirass is the correct answer for this question.

The chest cuirass is associated with negative pressure ventilation because it is designed to create a negative pressure environment around the thorax. This type of ventilation relies on the principle of creating a vacuum around the chest wall, which induces inhalation by drawing air into the lungs as the pressure inside the thoracic cavity decreases. This non-invasive method contrasts with positive pressure ventilation devices that push air into the lungs.

Other interfaces, such as nasal masks, tracheostomy tubes, and oral endotracheal tubes, are used primarily in positive pressure ventilation systems. They function by delivering air into the lungs through a conduit but do not create the negative pressure necessary for the distinct mode of negative pressure ventilation. Hence, the chest cuirass is the correct answer for this question.