The minimum acceptable volume of urine for routine urinalysis is ____ mL.

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The minimum volume for routine urinalysis is usually 12 mL,but 50 mL is preferable.Twelve milliliters is the minimum amount necessary for the usual processing procedure,in which 12 mL of urine is placed in a disposable centrifuge tube,centrifuged,and concentrated 12:1,so that 1 mL of sediment is retained for microscopic analysis of the sediment.This volume also allows for a convenient,standardized volume of urine for assessment of physical properties,such as color and transparency,which are often observed in the centrifuge tube.
 Smaller volumes may be accepted for chemical analysis from oliguric patients or from infants.If only 3 mL of urine is collected,a 12:1 concentration of sediment may still be made.A drop of unconcentrated urine placed on the desired portion of a reagent strip or observed microscopically may be all that is possible in some situations.

The Minimum Acceptable Volume of Urine for Routine Urinalysis Is