Canadian Society for Medical Laboratory Science (CSMLS) Practice Exam

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What is the meaning of MSU?

Median standard of urine
Maximum strength urine
Mid stream urine
Maximum standard unit

The correct answer is: Mid stream urine

The term "MSU" stands for "Mid Stream Urine." This method of urine collection is utilized to minimize contamination from the initial flow of urine, which may contain bacteria or other impurities from the urethra. By asking the patient to collect urine after discarding the first portion, healthcare professionals can obtain a cleaner sample that provides a more accurate assessment of the urinary tract and helps in diagnosing conditions related to kidney and bladder function. This method is a standard practice in laboratory medicine when conducting urinalysis or cultures, leading to more reliable results for clinical decision-making.