What is an early sign of hypoxia?

Confusion is an early sign of hypoxia because it reflects the brain's reaction to inadequate oxygen supply. The brain is highly sensitive to oxygen levels, and when these levels drop, cognitive function can decline, leading to confusion or disorientation. This symptom indicates that the brain is not receiving sufficient oxygen to perform optimally, which may escalate if the hypoxia continues without intervention. Identifying confusion as a symptom allows for timely assessment and appropriate action, such as administering supplemental oxygen or other necessary treatments to restore adequate oxygen levels.

In contrast, changes in skin appearance can indicate various conditions but are often considered later signs of hypoxia. Chest pain may arise from several medical issues, including but not limited to cardiac events, and is not specific to hypoxia. An SpO2 reading of 95% or higher typically indicates that oxygen saturation is within normal limits, suggesting that hypoxia is not present at that level. Therefore, confusion is a crucial early indicator for recognizing hypoxia promptly.