Name three oxygen delivery methods used in air medical transport and give an indication for each.

Name three oxygen delivery methods used in air medical transport and give an indication for each.

• A. Nasal cannula (mild hypoxemia); Nonrebreather mask (severe hypoxemia or need for high FiO2); Bag-valve-mask ventilation (airway obstruction or patient apneic).
• B. Nonrebreather mask for mild hypoxemia; Nasal cannula for severe; Bag-valve-mask for chest pain.
• C. Bag-valve-mask for mild; Nasal cannula for apneic; Nonrebreather for airway obstruction.
• D. Simple face mask for severe; Nasal cannula for moderate; Bag-valve-mask for comfort.

Answer: (A)

The question focuses on matching an oxygen delivery method to the patient’s breathing needs in air medical transport. Start with a method that provides small, gentle oxygen supplementation and escalate as the patient’s condition requires. Nasal cannula is ideal for mild hypoxemia or to keep baseline oxygenation while preserving comfort and mobility. It delivers low-flow oxygen with an FiO2 roughly 24–44% at about 1–6 liters per minute, making it suitable when the patient is breathing spontaneously but needs a modest increase in oxygen. The nonrebreather mask is used when a higher concentration of oxygen is needed quickly and the patient is still breathing on their own, though not intubated. It can provide a high FiO2—up to about 95% with a good seal and adequate flow—making it the choice for severe hypoxemia or when rapid improvement of oxygenation is required. Bag-valve-mask ventilation is employed when the patient is not breathing adequately or at all, or when there is a significant airway obstruction preventing effective spontaneous breathing. It delivers positive-pressure ventilation and helps oxygenate and oxygen delivery through manual breaths until the airway is secured or advanced support is available. The other options mix indications that aren’t aligned with how these devices are typically used (for example, using a nonrebreather for mild hypoxemia or relying on a bag-valve-mask for conditions like chest pain without ventilation failure).

The question focuses on matching an oxygen delivery method to the patient’s breathing needs in air medical transport. Start with a method that provides small, gentle oxygen supplementation and escalate as the patient’s condition requires.

Nasal cannula is ideal for mild hypoxemia or to keep baseline oxygenation while preserving comfort and mobility. It delivers low-flow oxygen with an FiO2 roughly 24–44% at about 1–6 liters per minute, making it suitable when the patient is breathing spontaneously but needs a modest increase in oxygen.

The nonrebreather mask is used when a higher concentration of oxygen is needed quickly and the patient is still breathing on their own, though not intubated. It can provide a high FiO2—up to about 95% with a good seal and adequate flow—making it the choice for severe hypoxemia or when rapid improvement of oxygenation is required.

Bag-valve-mask ventilation is employed when the patient is not breathing adequately or at all, or when there is a significant airway obstruction preventing effective spontaneous breathing. It delivers positive-pressure ventilation and helps oxygenate and oxygen delivery through manual breaths until the airway is secured or advanced support is available.

The other options mix indications that aren’t aligned with how these devices are typically used (for example, using a nonrebreather for mild hypoxemia or relying on a bag-valve-mask for conditions like chest pain without ventilation failure).