A nurse is caring for a critically ill client who is receiving oxygen through a nonrebreather mask. The nurse should remember that the client becomes at risk of oxygen toxicity at what concentration and length of administration?
A) Oxygen concentration of more than 25% given for longer than 24 hours
B) Oxygen concentration of more than 30% given for longer than 48 hours
C) Oxygen concentration of more than 25% given for longer than 36 hours
D) Oxygen concentration of more than 50% given for longer than 48 hours
D
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When administering oxygen to a critically ill client using a nonrebreather mask, the nurse should remember that an oxygen concentration of more than 50% given for longer than 48 hours can cause oxygen toxicity in the client. Oxygen toxicity means lung damage that develops when oxygen concentrations of more than 50% are administered for longer than 48 to 72 hours. The best way to prevent oxygen toxicity is to administer the lowest FiO2 possible for the shortest amount of time.
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