Magnetic Resonance Imaging (MRI) Practice Test

A technologist may be permitted to administer oxygen in an emergency situation. What is the most common rate used?

1. 1L/min

2. 2L/min

3. 3L/min

4. 5L/min

The correct answer is: 2L/min

In emergency situations, the administration of oxygen is often crucial for patient care, particularly in cases of respiratory distress or hypoxia. The most common flow rate for delivering supplemental oxygen via a nasal cannula is typically around 2 liters per minute. This rate is effective for providing a moderate increase in the patient's oxygen saturation without risking discomfort or excessive drying of the nasal mucosa. At 2L/min, patients can receive supplemental oxygen while still being able to speak and be mobile, which is important during emergencies when communication may be necessary. Additionally, this flow rate typically provides an FiO2 (Fraction of Inspired Oxygen) in the range of 28-30%, which is usually sufficient for patients who are not in severe respiratory distress. Higher flow rates, such as 3L/min or 5L/min, can lead to discomfort and may not be necessary for every patient in an emergency, as they could potentially cause irritation or pose a risk of drying the airway. Lower flow rates, such as 1L/min, might not provide adequate oxygenation for patients who are in distress. Therefore, administering oxygen at 2L/min strikes a balance between effective treatment and patient comfort in emergency scenarios.