A 24-hour specimen is an example of what type of specimen?

A 24-hour specimen is classified as a timed specimen because it is collected over a specific period, precisely 24 hours. This method of collection allows for the measurement of substances that may vary in concentration throughout the day, such as hormones, electrolytes, or creatinine levels. Timing is crucial for obtaining an accurate reflection of what is present in the body over the specified interval.

In contrast, random specimens are collected at any time without special timing considerations, spot specimens are typically collected at a single point in time to assess immediate levels of certain substances, and collection specimens refer generally to any specimen gathered for analysis but do not specify timing. The structured approach of a timed specimen like the 24-hour collection provides more detailed information about a patient's condition or the functioning of organs and systems over a specific timeframe.