Why should urine samples be examined within 1 hour of voiding?
A. RBCs, leukocytes and casts agglutinate on standing for several hours at room temperature B. Urobilinogen increases and bilirubin decreases after prolonged exposure to light C. Bacterial contamination will cause alkalinization of the urine D. Ketones will increase due to bacterial and cellular metabolism
Bacterial contamination will cause alkalinization of the urine
Evaluate each statement. (a) is incorrect because these cells dont agglutinate. (b) is partially correct, but urobilinogen decreases in light. (c) is true, bacterial overgrowth does lead to an alkaline urine. (d) is false, ketones are produced by fat metabolism in the patient