The Pulse Oximeter Indicates a Patient's Blood Oxygen Level Is

The pulse oximeter indicates a patient's blood oxygen level is 89%. A nurse knows that it is important to

A) Verify the oximeter is placed on a site that has adequate capillary refill.
B) Call the laboratory and order arterial blood gases to get a more accurate oxygen level.
C) Encourage the patient to get out of bed and ambulate more.
D) Let the patient rest quietly to reduce the need for oxygen.