Which assessment finding would best indicate a need for increased oxygen flow in a patient receiving supplemental oxygen?

A pulse oximetry reading below 90% is a critical indicator of inadequate oxygenation in a patient receiving supplemental oxygen. Normal oxygen saturation levels typically range from 95% to 100%. When readings fall below 90%, it suggests that the patient's blood is not carrying enough oxygen, which can lead to tissue hypoxia.

In this situation, the need for increased oxygen flow becomes evident because maintaining adequate oxygen levels is essential for cellular metabolism and overall organ function. When oxygen saturation levels are compromised, immediate action, such as increasing the flow of supplemental oxygen, is often required to ensure proper oxygen delivery to vital organs and maintain homeostasis.

While other signs like increased respiratory rate, decreased level of consciousness, and increased heart rate can indicate respiratory distress or a hypoxic state, the pulse oximetry reading provides a direct measurement of oxygen saturation, making it the most objective and reliable indicator for needing an adjustment in oxygen therapy.