OFA Respiratory Emergencies & Airway Management 3

Question 1

At what blood oxygen saturation (SpO₂) level should a first aider generally consider initiating supplemental oxygen therapy?

Accepted Answer

Below 95%

Answer

Below 99%

Answer

Below 80%

Answer

Below 70%

Question 2

What oxygen flow rate is required to maintain an adequate reservoir in a non-rebreather mask?

Accepted Answer

10–15 L/min

Answer

2–4 L/min

Answer

5–7 L/min

Answer

20–25 L/min

Question 3

A nasopharyngeal airway (NPA) is preferred over an oropharyngeal airway (OPA) when the patient:

Accepted Answer

Has an intact gag reflex or is semi-conscious

Answer

Is deeply unconscious with no gag reflex

Answer

Requires intubation in a hospital setting

Answer

Has a confirmed nasal fracture

Question 4

When using a bag-valve-mask (BVM) for rescue breathing, what indicates an appropriate tidal volume has been delivered?

Accepted Answer

Visible, gentle chest rise

Answer

The bag is squeezed completely flat

Answer

A full 2 seconds of forceful ventilation

Answer

Exactly 1 liter of air per breath

Question 5

What is 'agonal breathing' and why is it clinically significant in occupational first aid?

Accepted Answer

Irregular, gasping breaths that can occur after cardiac arrest and should NOT be mistaken for normal breathing

Answer

Normal deep breathing seen during heavy exertion

Answer

Rapid shallow breathing caused by anxiety or panic

Answer

A protective breath-holding response to toxic fumes

Question 6

Which condition is a contraindication to inserting an oropharyngeal airway (OPA)?

Accepted Answer

The patient is conscious or semi-conscious with a gag reflex

Answer

The patient is deeply unconscious

Answer

The patient has no gag reflex

Answer

The patient has dentures that have been removed

Question 7

When applying a pocket face mask for rescue breathing, which hand position correctly seals the mask while maintaining airway alignment?

Accepted Answer

Both thumbs holding the mask on the bridge of the nose and cheeks, fingers lifting the jaw in an E-C grip

Answer

One hand on the forehead, one hand under the neck

Answer

Both palms pressing the mask symmetrically onto the face

Answer

One hand sealing the mask, the other stabilizing the neck