What is the maximum level of FIO2 in the case below? - ProProfs Discuss
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What is the maximum level of FIO2 in the case below?



A male client with pneumonia develops respiratory failure and has a partial pressure of arterial oxygen of 55 mm Hg. Hes placed on mechanical ventilation with a fraction of inspired oxygen (FIO2) of 0.9.

A. 0.21
B. 0.35
C. 0.5
D. 0.7

This question is part of NCLEX Practice Test for Respiratory System 1 (Exam Mode) by RNpedia.com
Asked by RN pedia, Last updated: Sep 09, 2018

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2 Answers

d.Anthonyda

D.Anthonyda

Answered on Jan 15, 2018

If a male client with pneumonia develops respiratory failure with a partial pressure of arterial oxygen of 55 mm Hg he will be placed on a mechanical ventilator with a fraction of inspired oxygen (FIO2) of 0.9. In this case the goal goal for the nurses should be to reduce the FIO2 to no greater than a range of 0.18 to 0.21.

If an FIO2 is greater than 0.5 for even as little as 16 to 24 hours it can be toxic and result in decreased gas diffusion and surfactant activity. FIO2 is a fraction of oxygen that is enhanced to have a higher than atmosphere concentration of oxygen. This is vital for patients that are expereincing difficulty breathing.

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John Smith

John Smith

Answered on Sep 16, 2016

0.5

An FO2 greater than 0.5 for as little as 16 to 24 hours can be toxic and can lead to decreased gas diffusion and surfactant activity. The ideal oxygen source is room air F IO 2 0.18 to 0.21.
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