Which reagent strip measurement is typically not negative in routine urinalysis?

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Study for the Clinical Laboratory Science Test: Urinalysis and Body Fluids. Prepare with interactive questions, detailed explanations, and insightful feedback. Ace your examination!

Multiple Choice

Which reagent strip measurement is typically not negative in routine urinalysis?

Explanation:
Protein on a reagent strip is the measurement most likely to be nonnegative in routine urinalysis. The dipstick is highly sensitive to albumin, and even small amounts can be detected, so trace to mild proteinuria can frequently appear in real-world samples—often due to concentration effects, recent exercise, fever, or orthostatic proteinuria. In healthy urine, bilirubin and nitrite are typically negative unless specific conditions are present (liver/biliary disease for bilirubin, infection with nitrate-reducing bacteria for nitrite), and urobilinogen can be low or variable but is not as consistently nonnegative as protein.

Protein on a reagent strip is the measurement most likely to be nonnegative in routine urinalysis. The dipstick is highly sensitive to albumin, and even small amounts can be detected, so trace to mild proteinuria can frequently appear in real-world samples—often due to concentration effects, recent exercise, fever, or orthostatic proteinuria. In healthy urine, bilirubin and nitrite are typically negative unless specific conditions are present (liver/biliary disease for bilirubin, infection with nitrate-reducing bacteria for nitrite), and urobilinogen can be low or variable but is not as consistently nonnegative as protein.

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