North Carolina EMT State Practice Exam

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Study for the North Carolina EMT Exam with our engaging resources. Utilize flashcards and multiple choice questions designed to help you grasp critical concepts with hints and explanations. Ace your examination and take the first step towards a rewarding career in emergency medical services!

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What is the flow rate for a non-rebreather mask (NRB)?

6 to 9 L/min
10 to 12 L/min
12 to 15 L/min
16 to 20 L/min

The correct answer is: 12 to 15 L/min

A non-rebreather mask (NRB) is designed to deliver high concentrations of oxygen to a patient who is in respiratory distress or has a critical condition requiring supplemental oxygen. The correct flow rate for an NRB is between 12 to 15 liters per minute. This flow rate ensures that the reservoir bag remains inflated during inhalation, allowing the patient to receive nearly 100% oxygen with minimal dilution by ambient air. This specific flow rate is critical for maintaining a high oxygen concentration as patients with severe hypoxia need it to rapidly improve their oxygen saturation levels. If the flow rate is lower, it can result in the bag collapsing during inhalation, leading to inadequate oxygen delivery. Conversely, excessively high flow rates beyond 15 L/min may not be necessary for effective treatment and could lead to wastage of oxygen.