A member asked:

Male 70, urea nitrogen test bun : high- 30, creatine test low- .72 bun/creatine ratio- 42 serious kidney problem ?

A doctor has provided 1 answer
Dr. Hiep Le answered

Specializes in Nephrology and Dialysis

High BUN is only relevant to kidney function when creatinine is high at the same time. Two common causes of high BUN with normal creatinine: mild dehydration and poor heart function. The other possibilities are high protein intake in the previous day before test or taking corticosteroids.

Answered 11/13/2022

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