A nodding motion of the sacrum that rocks the top of the sacrum in a posterior direction

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.

Which of the following is NOT a first aid treatment for minor wounds without severe bleeding?

A) put on gloves to avoid contamination B) wash the wound with soap and water C) use sterile gauze to blot the wound dry D) apply an antibiotic ointment