Which of the Following Is a Disadvantage of Pulse Oximetry

Multiple Choice

Which of the following is a disadvantage of pulse oximetry?

A) Tissue hypoxia may be present even with a normal SaO₂ reading.
B) Pulse oximetry cannot differentiate between hemoglobin bound to oxygen and hemoglobin bound to carbon monoxide.
C) Pulse oximetry gives no information about the amount of carbon dioxide in the blood.
D) All of the above are disadvantages.