What is a key indicator of the need for oxygen supplementation in a patient?

Oxygen supplementation is often indicated when a patient exhibits low pulse oximetry readings. This device measures the saturation of oxygen in the blood. Normal readings typically range from 95% to 100% for healthy individuals. When readings fall below these levels, it suggests that the patient's oxygen levels are inadequate for their body's needs, which may be due to various underlying conditions such as respiratory distress, hypoxia, or other medical emergencies.

While a normal respiratory rate, clear lung sounds, and the ability to speak in full sentences can suggest that a patient is stable and not in immediate respiratory distress, they do not necessarily provide a complete picture of the patient's oxygenation status. For example, a patient may have a normal respiratory rate but still be experiencing low oxygen levels due to a condition such as pneumonia or a pulmonary embolism. Therefore, identifying low pulse oximetry readings is crucial in determining the need for oxygen therapy and ensuring effective patient care.