Correct!
2. The SaO2 is usually decreased

The symptoms of CO poisoning are nonspecific. Table 1 lists some of the most common symptoms of CO poisoning.

CO poisoning should lower SaO2, however, it does not necessarily lower the PaO2. Physical exam signs of CO poisoning are generally nonspecific (2). The “classic” findings of cherry-red lips, skin, and mucus membranes is very rare (2).

Which of the following are true regarding treatment of CO poisoning? (click on the correct answer to be directed to the sixth of seven pages)

1. All patients should receive hyperbaric oxygen to prevent the delayed neuropsychiatric syndrome.
2. High-flow 100% FiO2 continued until carboxyhemoglobin levels have normalized.
3. Pulse oximetry accurately measures SpO2 and if normal, eliminates the diagnosis of CO poisoning.
4. 1 and 3
5. All of the above

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