A nurse is advising a nursing student who is preparing a teaching presentation f

A nurse is advising a nursing student who is preparing a teaching presentation for fellow students regarding urinalysis. Which of these teaching points, if made by the student, requires intervention by the nurse?
1. Urine culture 150,000 organisms/mL. Female patients should separate the labia with one hand and clean the labia with the other, using sterile cotton swabs saturated with a cleansing solution, wiping back to front.
2. serum creatinine 1.20 mg/dL.
3. urine osmolality 400 mOsm/kg H2O.
4. blood urea nitrogen (BUN) 30 mg/dL.