Which of the following devices can deliver NIV?

Nasal masks are specifically designed for delivering noninvasive ventilation (NIV), as they fit over the nose and possible part of the mouth in a way that allows air to be delivered directly to the patient's airway without the need for invasive procedures like intubation. This makes them suitable for patients who have respiratory failure but do not require invasive mechanical ventilation.

Nasal masks create a seal around the patient's face, allowing ventilators to provide assisted ventilation without the complications associated with invasive devices. This is especially beneficial for patients with conditions such as obstructive sleep apnea, chronic obstructive pulmonary disease (COPD), or acute respiratory distress, where proper ventilation is critical but can be achieved without intubation.

In contrast, devices like endotracheal tubes and tracheostomy tubes are meant for invasive ventilation, which involves placing a tube directly into the trachea, thus bypassing the upper airway entirely. An invasive ventilator also requires the use of endotracheal or tracheostomy tubes for delivering the necessary pressure support. Therefore, while those devices are integral to mechanical ventilation, they do not deliver NIV, which is the focus of the question.