A nurse is caring for a child who has a urinary tract infection. Which of the following findings should the nurse expect?

Choice A rationale:
Urine osmolality 500 mOsm/kg. Urine osmolality is a measure of urine concentration and is not a reliable indicator of infection. It reflects the kidney's ability to concentrate urine and can vary based on hydration status and other factors. An elevated urine osmolality could suggest dehydration, not necessarily infection.
Choice B rationale:
WBC 17,500/mm3. This is the correct choice. An elevated white blood cell count (WBC) is a hallmark sign of infection. The body's immune response to an infection often includes an increase in WBC count, particularly the neutrophil count. This elevation is known as leukocytosis and is a red flag for infection.
Choice C rationale:
BUN 12 mg/dL. Blood Urea Nitrogen (BUN) measures kidney function and hydration status. While an elevated BUN can indicate dehydration, it is not a specific marker for infection. BUN levels can be influenced by various factors, including diet and renal function.
Choice D rationale:
Urine specific gravity 1.014. Urine-specific gravity reflects the concentration of solutes in urine and the kidney's ability to concentrate or dilute urine. While changes in urine specific gravity can indicate dehydration or overhydration, it is not a direct indicator of infection. An infection is better detected through changes in WBC count and other clinical signs.

Choice A rationale:
Positioning the child sitting with their buttocks at the edge of the table is not appropriate for collecting a bone marrow specimen from a preschooler. This position does not provide adequate access to the bone marrow aspiration site and may lead to discomfort for the child.
Choice B rationale:
Placing the child in a prone position (lying face down) is suitable for collecting a bone marrow specimen from a preschooler. This position exposes the posterior iliac crest, which is a common site for bone marrow aspiration. It allows for easier access to the bone marrow and reduces the risk of injury.
Choice C rationale:
Positioning the child side-lying to expose the vertebrae is not the recommended position for bone marrow aspiration. The iliac crest, not the vertebrae, is the usual site for this procedure in children. Placing the child in a side-lying position would make it difficult to access the appropriate site.
Choice D rationale:
Placing the child supine with legs flexed outward into a frog-like position is suitable for collecting a bone marrow specimen. This position provides access to the iliac crest while allowing for better immobilization of the child. It also ensures the child's safety and comfort during the procedure.