Which of the following statements is true about the use of O2 during advanced cardiac life sup-port (ACLS)?
a. Expired air ventilation is sufficient during provision of ACLS.
b. The highest possible FiO2 should be applied as quickly as possible.
c. Lack of O2 (hypoxia) has little effect on other ACLS procedures.
d. An FiO2 of 0.5 is most optimal for avoiding toxicity.
ANS: B
Because low cardiac output, pulmonary shunting, and abnormalities during CPR lead to hypoxia, the highest possible concentration of O2 should be administered as soon as possible.
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