494961 tn?1250745677
low bun
I am needing to know what causes a low BUN?
I had some lab work done because of fatigue and other symptoms
I only have one kidney and my labs on my BUN and total protein serum have always been in the normal range.

this is my blood work.....I hope someone can help me

THESE ARE THE ONES THAT CAME BACK HIGH OR LOW

NE# - 5.5 -     HIGH      2.2 - 4.8      10 ^ 3
RBC - 4.68-    LOW      4.70 - 6.10   10 ^ 6UL
MCH - 31.9     HIGH      27 - 31         PG
BUN -  6         LOW       7 - 17          MG/DL
TOTAL PROTEIN SERUM -  8.4   HIGH   6.3 - 8.2     G/DL
CL - 108          HIGH      98 - 107        MMOL/L

my BUN has never been that low before it always stayed around 9 -10
I have never had the total protein  to be elevated

should I be concerned with these numbers with only having the one kidney?
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494961 tn?1250745677
I forgot to mention the SED - RATE      21     HIGH     0 - 20
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Hi, “blood urea nitrogen (BUN) measures the amount of urea nitrogen, a waste product of protein metabolism, in the blood. Urea is formed by the liver and carried by the blood to the kidneys for excretion. Because urea is cleared from the bloodstream by the kidneys, a test measuring how much urea nitrogen remains in the blood can be used as a test of renal function. However, there are many factors besides renal disease that can cause BUN alterations, including protein breakdown, hydration status, and liver failure.

A decreased BUN may be seen in:
• Liver failure
• Malnutrition
• Anabolic steroid use
• Overhydration, Which can result from prolonged intravenous fluids
• Pregnancy (due to increased plasma volume)
• Impaired nutrient absorption
• Syndrome of inappropriate anti-diuretic secretion (SIADH) “

Taken from website http://www.rnceus.com/renal/renalbun.html

But, in your case, relax; it does not seem to worrisome as your other parameters are more or less ok.
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584064 tn?1218213546
Yups, Low BUN means that your kidney functions are at the lowest and thing cannot be good, if it is continued for long...... :(
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