Patient Care Technician Certification (PCTC) Terminology Practice Test

Which description best matches a 24-hour urine specimen?

A Random Urine Sample The 24-Hour Specimen A Clean-Catch Specimen A First-Morning Specimen

Correct Answer:

The 24-Hour Specimen

Explanation:

Collecting urine over a 24-hour period to measure the total daily excretion of a substance. This type of specimen isn’t a single random void; it requires starting after an emptying and then gathering every urine output for the next 24 hours, ending with the final void at the end of the period. The first morning urine is typically discarded to establish an accurate start time. This approach provides the complete 24-hour total needed for accurate measurements of substances like electrolytes, creatinine, protein, or hormones. In contrast, a random urine sample is just one void at an arbitrary time, a clean-catch is a midstream sample for culture, and a first-morning specimen is simply the initial urine after waking, not a full 24-hour collection.

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