Mr.Smith, a homeless man with past history of alcoholism, has been hospitalized with a foot ulcer.His blood urea nitrogen level is elevated.What condition might his BUN be indicative of?

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Elevated blood urea nitrogen (BUN) levels can indicate kidney disease, as the kidneys are responsible for filtering urea from the blood. Dehydration can also cause elevated BUN levels because it reduces blood flow to the kidneys, impairing their ability to filter waste.

MrSmith, a Homeless Man with Past History of Alcoholism, Has