A nurse is admitting a client who is dehydrated. Which BUN level should the nurse expect the client to have upon admission? (Normal BUN 10-20)

The correct answer is D: 31 mg/dL. When a client is dehydrated, the blood urea nitrogen (BUN) level is expected to be elevated due to inadequate fluid intake. A BUN level of 31 mg/dL falls within the normal range of 10-20 mg/dL but is on the higher side, reflecting dehydration. Choice A (165 mg/dL) is significantly elevated and indicates severe dehydration or kidney dysfunction. Choice B (35 mg/dL) is slightly elevated but not as high as expected in dehydration. Choice C (10 mg/dL) is within the normal range and does not reflect dehydration. Therefore, the most appropriate choice is D as it aligns with the expected BUN level in a dehydrated client.