Clinical Laboratory DX Exam 2 Practice

Which item is listed as a cause of increased BUN in the third group?

Shock Starvation Ureteral obstruction Sepsis

Correct Answer:

Sepsis

Explanation:

BUN rises when the kidneys aren’t clearing urea effectively or when more urea is produced from protein breakdown. Sepsis fits this by commonly causing acute kidney injury from reduced blood flow and inflammatory damage, along with a hypercatabolic state that increases protein breakdown and urea production. This combination pushes BUN higher. While other conditions can influence BUN, sepsis is the scenario here that most consistently leads to an elevated BUN due to both impaired clearance and increased production.

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