What is the term for an abnormally low concentration of oxygen in the blood?

The correct term for an abnormally low concentration of oxygen in the blood is hypoxemia. This condition specifically refers to low levels of oxygen in the arterial blood, which can lead to various physiological effects and health issues.

Hypoxemia can be caused by a range of factors, including respiratory disorders, high altitudes, or cardiovascular issues that impair the delivery of oxygen to the tissues. Recognizing hypoxemia is crucial for addressing and managing conditions that may arise from insufficient oxygen levels in the body.

While hypoxia refers more generally to a deficiency of oxygen in the tissues, apoxia indicates an absence of oxygen altogether, which is a more extreme condition but not specifically related to blood oxygen levels. Hyperoxia, on the other hand, indicates an excess of oxygen in the tissues, which is not relevant to the definition in question. Understanding these distinctions helps to clarify the specifics of oxygen levels and their implications for health.