Urinalysis (UA) is best described as

• A. A test that measures kidney function by blood sampling
• B. A laboratory test that consists of physical, chemical, and microscopic examination of urine
• C. A scan of the urinary tract using contrast
• D. A culture of urine for bacterial growth only

Answer: (D)

A urinalysis is a comprehensive laboratory examination of urine that includes physical, chemical, and microscopic components. The physical part notes characteristics such as color, clarity, odor, and volume. The chemical portion uses a dipstick to detect substances like protein, glucose, ketones, bilirubin, urobilinogen, pH, specific gravity, blood, and leukocyte esterase, helping screen for infection, diabetes, liver issues, stones, and hydration status. The microscopic portion examines cells, crystals, casts, and bacteria to identify infection or other pathology. This broad approach is why urinalysis is described as a multi-faceted urine study rather than just a culture. A urine culture is a separate test performed specifically to identify bacteria and determine antibiotic sensitivities when infection is suspected or confirmed, and it is not the defining description of urinalysis.