(Select all that apply): A nurse is educating a group of patients about different oxygen delivery devices. Which of the following are examples of low-flow oxygen delivery systems?

Choice A rationale:

Nasal cannula delivers low to moderate concentrations of oxygen and may not be effective for a client with thick secretions, dry mucous membranes, or upper airway edema. Additionally, the nasal cannula may not provide sufficient humidification to alleviate these conditions.

Choice B rationale:

The simple face mask is not ideal for a client with thick secretions, dry mucous membranes, or upper airway edema as it may not provide enough humidification and could be uncomfortable for the patient.

Choice C rationale:

A partial rebreather mask also may not be the most appropriate choice for this client as it has a reservoir bag that may not adequately humidify the oxygen, leading to discomfort and potential worsening of dry mucous membranes.

Choice D rationale:

The aerosol mask is the most appropriate choice because it delivers humidified oxygen in the form of small aerosol particles, which can help alleviate thick secretions, moisturize dry mucous membranes, and reduce upper airway edema. This mask is beneficial for patients who require higher humidity levels to maintain airway patency and comfort.

The correct answer is choice a. PaO2 80 mmHg.

Choice A rationale:

PaO2 (partial pressure of oxygen in arterial blood) of 80 mmHg indicates that the oxygen therapy has been effective. Normal PaO2 levels range from 75 to 100 mmHg, so a value of 80 mmHg suggests adequate oxygenation.

Choice B rationale:

SaO2 (arterial oxygen saturation) of 88% is below the normal range (typically 95-100%) and indicates hypoxemia, suggesting that the oxygen therapy has not been fully effective.

Choice C rationale:

A respiratory rate (RR) of 32 breaths per minute is significantly higher than the normal range (12-20 breaths per minute) and indicates respiratory distress, suggesting that the oxygen therapy has not been effective.

Choice D rationale:

Blood pressure (BP) of 160/90 mmHg is elevated and indicates hypertension, which is not a direct measure of the effectiveness of oxygen therapy. This finding does not provide information about the patient’s oxygenation status.