What is the correct specimen volume required for a urinalysis test?

What is the correct specimen volume required for a urinalysis test?

• A. 10ml
• B. 50ml
• C. 30ml
• D. 20ml

Answer: (C)

For a complete urinalysis, you need enough urine to run the chemical tests, examine the sediment microscopically, and still have material left if culture or repeat testing is needed. Thirty milliliters is the commonly recommended volume because it provides ample sample for all these steps without wasting more than necessary. Too little—like 10 or 20 mL—can be insufficient for accurate analysis or for a culture if required, while 50 mL is more than needed for routine testing. So the standard, practical volume is thirty milliliters.

For a complete urinalysis, you need enough urine to run the chemical tests, examine the sediment microscopically, and still have material left if culture or repeat testing is needed. Thirty milliliters is the commonly recommended volume because it provides ample sample for all these steps without wasting more than necessary. Too little—like 10 or 20 mL—can be insufficient for accurate analysis or for a culture if required, while 50 mL is more than needed for routine testing. So the standard, practical volume is thirty milliliters.