Criteria for initiating hyperbaric oxygen (HBO) therapy on an adult patient suspected of suffer-ing from acute carbon monoxide poisoning include which of the following?

1. History of unconsciousness
2. Carboxyhemoglobin saturation less than 20%
3. Presence of neurologic abnormality
4. Presence of cardiac instability
a. 2 and 3 only
b. 1, 3, and 4 only
c. 3 and 4 only
d. 1, 2, 3, and 4


ANS: B
Box 41-7 lists current criteria for selecting patients with acute carbon monoxide poisoning for treatment with HBO.

Health Professions

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