Choice B is correct. Assessing the client's oxygen saturation is essential because this client is demonstrating manifestations of hypoxia. Early signs of hypoxia include altered mental status and restlessness. Moderate sedation uses multiple medications, such as fentanyl and propofol, to achieve a state of altered consciousness, so procedures like shoulder reductions may be completed with very little pain. These medications are CNS depressants, and during the procedure, the client is often given supplemental oxygen. Post-procedurally, the nurse will monitor the client's vital signs very closely.

Choices A, C, and D are incorrect. Assessing the client's pain level, GCS, and lung sounds will not clue the nurse into the most serious problem of hypoxia. These are key assessments but are not the priority when looking at the client's airway, breathing, and circulation.

✓ A moderate sedation procedure requires informed consent, and the nurse will serve as a witness.

✓ Common medications utilized for moderate (conscious) sedation include fentanyl, midazolam, or propofol.

✓ Anesthesia providers, other physicians, dentists, and oral surgeons are qualified to administer conscious sedation, and the nurse does not administer anesthesia intravenously.

✓ When this type of sedation is utilized for a closed reduction, it is a quick process that requires close monitoring of the client's vital signs, end-tidal carbon dioxide (normal is 20 and 40 mm Hg), cardiac rhythm, and level of consciousness.