Which statement best describes the procedure for a basic urinalysis using dipstick testing and sediment examination?

• A. Collect midstream urine; perform dipstick test per manufacturer; read results; centrifuge a portion to examine sediment under a microscope for cells, crystals, and casts
• B. Collect a 24-hour sample only
• C. Use catheterized sample only
• D. Skip dipstick and go straight to microscopy

Answer: (A)

A basic urinalysis combines a rapid chemical screen with microscopic sediment analysis, starting with a clean midstream collection to minimize contamination. After collecting the urine, the dipstick is used and read according to the manufacturer’s instructions, giving quick information about chemical markers such as pH, protein, glucose, ketones, blood, nitrites, and leukocyte esterase. This screening helps flag abnormalities that guide what to look for next. A portion of the urine is then centrifuged to concentrate the sediment, which is examined under a microscope for cells, crystals, and casts. This microscopic view reveals visible evidence of infection, inflammation, stone formation, or tubular damage that the dipstick can’t quantify or identify.

Why this sequence fits basic practice: the dipstick provides fast, broad screening, while sediment examination adds detailed cellular and particulate information. A 24-hour sample is used for different kinds of quantitative investigations, not a routine screening. A catheterized sample is reserved for particular clinical situations and isn’t the standard starting material for a basic urinalysis. Skipping the dipstick ignores valuable chemical information, and going straight to microscopy misses those initial screening markers.