Final answer:
During resuscitation, oxygen concentration is monitored using a pulse oximeter, which measures blood oxygen saturation levels, with normal ranges between 95-100 percent.
Step-by-step explanation:
The oxygen concentration used during resuscitation is guided by the use of a pulse oximeter. This device measures the percent saturation of oxygen in the blood, which is reflective of a patient's metabolic rate. Normal readings from a pulse oximeter range from 95-100 percent. Low readings indicate hypoxemia or hypoxia, conditions where there is insufficient oxygen in the blood. Hemoglobin in red blood cells binds oxygen and facilitates its transport, boosting dissolved oxygen levels significantly compared to what would be achieved with dissolved oxygen alone in body fluids.