Which pair correctly matches the minimum specimen amounts for urinalysis and steroid testing?

Which pair correctly matches the minimum specimen amounts for urinalysis and steroid testing?

• A. Thirty milliliters and Sixty milliliters
• B. Sixty milliliters and Thirty milliliters
• C. Fifty milliliters and Seventy milliliters
• D. Ten milliliters and Twenty milliliters

Answer: (A)

Understanding why different urine volumes are required for urinalysis versus steroid testing helps ensure the lab has enough material for all steps and possible confirmatory tests. For a routine urinalysis, about 30 milliliters of urine provides enough volume to perform chemical dipstick analysis, microscopic examination, and still leave a portion in reserve for any quick reflex tests or rechecks without wasting sample. Using significantly more than is necessary can add handling steps without added benefit, while too little can compromise accuracy. Steroid testing, especially when profiling or using confirmatory methods like GC-MS or LC-MS/MS, needs more starting material because the analysis involves extraction, concentration, and sometimes multiple aliquots for screening and confirmation. Sixty milliliters provides a practical amount that supports these preparation steps and potential reanalysis while preserving sample integrity. So pairing 30 milliliters for urinalysis with 60 milliliters for steroid testing aligns with the workflow demands of each test, making it the best match.

Understanding why different urine volumes are required for urinalysis versus steroid testing helps ensure the lab has enough material for all steps and possible confirmatory tests. For a routine urinalysis, about 30 milliliters of urine provides enough volume to perform chemical dipstick analysis, microscopic examination, and still leave a portion in reserve for any quick reflex tests or rechecks without wasting sample. Using significantly more than is necessary can add handling steps without added benefit, while too little can compromise accuracy.

Steroid testing, especially when profiling or using confirmatory methods like GC-MS or LC-MS/MS, needs more starting material because the analysis involves extraction, concentration, and sometimes multiple aliquots for screening and confirmation. Sixty milliliters provides a practical amount that supports these preparation steps and potential reanalysis while preserving sample integrity.

So pairing 30 milliliters for urinalysis with 60 milliliters for steroid testing aligns with the workflow demands of each test, making it the best match.