Why Is Clean-Catch Midstream Urine Used for a Urine Culture

Multiple Choice

Why is clean-catch midstream urine used for a urine culture as opposed to a clean-catch urine?

A) The first portion of the urine flow washes contaminants from the urethra and the next portion of urine is more representative of the bladder.
B) The name was changed, but the procedure remains the same and the entire amount of urine from the bladder is cultured.
C) No urine is free from contamination, so just wipe the external genitalia and void into the cup.
D) Catheterized specimens are also called clean-catch midstream urine specimen.