Noninvasive mask at 12 L/min can deliver FiO2 in which approximate range, depending on fit?

Study for the Respiratory Therapy Test. Use flashcards and multiple choice questions, featuring hints and explanations. Prepare for your exam successfully!

Multiple Choice

Noninvasive mask at 12 L/min can deliver FiO2 in which approximate range, depending on fit?

Noninvasive oxygen delivery depends on the device, the flow, and how well it seals on the face. A nonrebreather mask uses a reservoir and one‑way valves to minimize rebreathing of exhaled gas, so with enough flow to keep the bag full, the patient inhales mainly what’s in the reservoir rather than room air. At 12 L/min, a well‑fitted mask reduces entrainment and can deliver FiO2 close to the high end—roughly 0.80–0.95. If the fit is poor or flow isn’t enough to keep the reservoir filled, FiO2 drops toward lower values.

Noninvasive oxygen delivery depends on the device, the flow, and how well it seals on the face. A nonrebreather mask uses a reservoir and one‑way valves to minimize rebreathing of exhaled gas, so with enough flow to keep the bag full, the patient inhales mainly what’s in the reservoir rather than room air. At 12 L/min, a well‑fitted mask reduces entrainment and can deliver FiO2 close to the high end—roughly 0.80–0.95. If the fit is poor or flow isn’t enough to keep the reservoir filled, FiO2 drops toward lower values.

More practice questions