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NBRC Certified Respiratory Therapist Practice Tests & Test Prep by Exam Edge - Review



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NBRC Certified Respiratory Therapist - Reviews


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Based on 200 reviews


See Why Our Users from 154 Countries Love Us!

Exam Edge is an industry leader in online test prep. We work with institutional partners to offer a wide array of practice tests that will help you prepare for your big exam. No matter how niche your field of interest might be, we are here to help you prepare for test day.



See why our users from 154 countries love us for their exam prep! Including 200 reviews for the NBRC CRT exam.

Exam Edge is an industry leader in online test prep. We work with institutional partners to offer a wide array of practice tests that will help you prepare for your big exam. No matter how niche your field of interest might be, we're here to help you prepare for test day.

   Excellent -- Based on 200 reviews

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NBRC Certified Respiratory Therapist - Test Reviews Sample Questions

If you have a patient who relies on a hypoxic respiratory drive, you would use which of the following types of oxygen delivery devices which is designed to deliver O2 concentrations of 30% to 40%?

Correct Answer:
venturi mask


the correct choice of oxygen delivery device for a patient who relies on a hypoxic respiratory drive is crucial in ensuring that their oxygen needs are met without causing potential harm. patients with chronic obstructive pulmonary disease (copd) and certain other conditions often rely on a hypoxic drive to breathe. in such patients, administering too much oxygen can suppress their natural respiratory drive, leading to a decrease in respiratory rate and potentially life-threatening situations.

among the options provided, the venturi mask is specifically designed to deliver precise concentrations of oxygen, typically ranging from 24% to 50%. this feature makes it the ideal choice for patients who rely on a hypoxic respiratory drive. the ability to control the fraction of inspired oxygen (fio2) is crucial for these patients to avoid the risk of hyperoxia, which can suppress their natural urge to breathe.

the mechanism of the venturi mask involves using a specific adaptor with different sized nozzles or entrainment ports that allows a fixed amount of air to mix with oxygen, thus controlling the concentration of oxygen delivered. it uses the bernoulli principle and venturi effect to draw in ambient air through these ports, which mixes with the pure oxygen coming from the oxygen supply. this results in a more predictable and accurate fio2 compared to other masks.

in contrast, other masks such as the nonrebreather mask, partial rebreather mask, and simple face mask do not offer the same level of precision in oxygen delivery. a nonrebreather mask is designed for higher concentrations of oxygen (typically 60% to 100%), which can be dangerous for patients with a hypoxic drive. similarly, partial rebreather and simple masks do not allow precise control over the oxygen concentration, making them unsuitable for patients who require controlled oxygen therapy.

therefore, for a patient with a dependency on a hypoxic respiratory drive, the venturi mask is the most appropriate choice among the given options. it ensures the delivery of a controlled amount of oxygen, which is critical in managing their respiratory status effectively without compromising their natural breathing mechanisms.