Pulse oximetry will not provide a true assessment of arterial oxygenation in patients with carbon monoxide toxicity because:
A) the device falsely interprets oxyhemoglobin as carboxyhemoglobin.
B) carbon monoxide damages the computer chip inside the pulse oximeter.
C) the device cannot determine whether carbon monoxide or oxygen is bound to the hemoglobin.
D) carbon monoxide turns the blood dark red, which indicates low oxygen content.
Answer: C) the device cannot determine whether carbon monoxide or oxygen is bound to the hemoglobin.
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