What should be done if pulse oximetry may be inaccurate in burn patients with suspected carbon monoxide poisoning?

1. Ignore CO risk entirely if the measured SpO2 reading is normal
2. Obtain CO-oximetry and give 100% oxygen if CO poisoning is suspected
3. Use a non-rebreather mask only when SpO2 stays above 98 percent
4. Delay all oxygen therapy until arterial blood gas labs return

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