Which of the following is NOT a vital sign?

Vital signs are key indicators of an individual's basic bodily functions and include measurements that reflect physiological status. The normal set of vital signs typically includes blood pressure, heart rate, and body temperature. Each of these measurements provides essential insights into a person's health condition.

Blood pressure measures the force of blood against the artery walls, heart rate counts the number of heartbeats per minute, and body temperature reflects the body’s ability to generate and dissipate heat, indicating metabolic and physiological balance.

Blood sugar, while an important health metric, does not fall under the category of vital signs. It is a measurement used to assess the body’s glucose levels and is crucial for managing conditions like diabetes. However, it is not routinely classified or monitored as part of the standard set of vital signs used during clinical assessments. Thus, it is the correct answer to the question about which option is NOT considered a vital sign.