Prepare for the Paramedic Readiness Exam 4 with our engaging quiz. Hone your skills with targeted questions, hints, and in-depth explanations. Excel on your exam with confidence!

Multiple Choice

In a sickle cell crisis, which device should be used to administer oxygen?

The goal in a sickle cell crisis is to maximize oxygen delivery to keep HbS from polymerizing and causing more sickling. A device with a reservoir and one-way valves delivers the highest concentration of oxygen available from a simple device, making it ideal for rapidly achieving and maintaining high oxygen saturation. The non-rebreather mask fits tightly and uses a reservoir bag so you can push near-ambient oxygen to the patient while preventing exhaled air from diluting the gas in the bag. When used at appropriate flow, it provides the highest FiO2 among common masks, which is especially important in acute distress or hypoxemia. Nasal cannulas deliver relatively low FiO2 and are limited by the patient’s tidal volume and comfort. Simple face masks can provide moderate FiO2 but are less reliable due to mask fit and bag dynamics. Venturi masks offer precise, controlled FiO2 but typically do not reach the highest oxygen concentrations, which is why they’re less ideal when the priority is rapid, high oxygen delivery.

The goal in a sickle cell crisis is to maximize oxygen delivery to keep HbS from polymerizing and causing more sickling. A device with a reservoir and one-way valves delivers the highest concentration of oxygen available from a simple device, making it ideal for rapidly achieving and maintaining high oxygen saturation. The non-rebreather mask fits tightly and uses a reservoir bag so you can push near-ambient oxygen to the patient while preventing exhaled air from diluting the gas in the bag. When used at appropriate flow, it provides the highest FiO2 among common masks, which is especially important in acute distress or hypoxemia.

Nasal cannulas deliver relatively low FiO2 and are limited by the patient’s tidal volume and comfort. Simple face masks can provide moderate FiO2 but are less reliable due to mask fit and bag dynamics. Venturi masks offer precise, controlled FiO2 but typically do not reach the highest oxygen concentrations, which is why they’re less ideal when the priority is rapid, high oxygen delivery.