Which condition is indicated by a pulse oximetry reading below 90%?

A pulse oximetry reading below 90% indicates hypoxemia, which is a condition characterized by abnormally low levels of oxygen in the blood. Normal oxygen saturation levels typically range from 95% to 100%. When levels fall below 90%, it suggests that the body is not receiving sufficient oxygen, potentially leading to tissue hypoxia. This can result from various respiratory or cardiovascular issues, such as chronic obstructive pulmonary disease (COPD), pneumonia, or pulmonary embolism, among others.

Recognition of hypoxemia is critical in nursing practice, as it often requires prompt assessment and intervention to prevent further complications. Monitoring pulse oximetry can provide valuable information about a patient's respiratory status and guide treatment decisions.