The urinalysis procedure specifies a 30ml specimen volume.

The urinalysis procedure specifies a 30ml specimen volume.

• A. 10ml
• B. 20ml
• C. 30ml
• D. 40ml

Answer: (C)

The key idea is to follow the procedure’s specified specimen volume so there’s enough urine for all parts of the analysis without wasting sample. Thirty milliliters is a common minimum for routine urinalysis because it provides sufficient volume for chemical tests, microscopic sediment examination, and any needed repeats or aliquots for culture if required. Collecting less than that can leave too little sample for accurate testing or for repeat testing, while collecting more than 30 mL doesn’t improve accuracy and simply uses extra sample. Therefore, the specified volume of 30 mL is the correct target.

The key idea is to follow the procedure’s specified specimen volume so there’s enough urine for all parts of the analysis without wasting sample. Thirty milliliters is a common minimum for routine urinalysis because it provides sufficient volume for chemical tests, microscopic sediment examination, and any needed repeats or aliquots for culture if required. Collecting less than that can leave too little sample for accurate testing or for repeat testing, while collecting more than 30 mL doesn’t improve accuracy and simply uses extra sample. Therefore, the specified volume of 30 mL is the correct target.