Library/Kidney/BUN/23

BUN of 23 mg/dLWhat it means, and what usually happens next

23mg/dL BUN
Slightly high
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A BUN of 23 mg/dL is a little above the usual 7 to 20 mg/dL.

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BUN23mg/dL
In mmol/L urea8.2
The usual rangeabout 7 to 20 mg/dL (some labs 6 to 24)

What usually happens next

Not drinking enough and a high-protein diet are the common reasons, and BUN creeps up with age.

If creatinine and eGFR are normal, a repeat when well hydrated usually reads lower.

What a high BUN usually means, and its common causes

When a BUN can read wrong

BUN rises with dehydration, a big protein intake, steroids and bleeding in the gut, none of which mean the kidneys are failing. Creatinine and eGFR are the better kidney measures.

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Questions

Is a BUN of 23 mg/dL normal?

A BUN of 23 mg/dL is a little above the usual 7 to 20 mg/dL. The usual range is about 7 to 20 mg/dL (some labs 6 to 24).

What is 23 mg/dL in mmol/L urea?

8.2 mmol/L urea. Labs in different countries print BUN in different units; the meaning is the same.

Worked out by LifeFrom from the usual lab range (Clinical Methods), and not yet reviewed by a clinician. For your own understanding: only a lab test, read by your clinician, diagnoses anything.