Hospitals and other facilities use pulse oximeters in a lot of situations. Pulse oximeters monitor patients during surgery and recovery, as well as in intensive care and other emergency states. They are valuable pieces of medical device that provide a constant stream of data and information for medical personnel. Usually, a pulse oximeter delivers digital figures of the percentage of oxygenation in the blood, as well as a highly audible sound that signifies the heartbeat or the pulse of the patient.