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What Do These BUN And Creatinine Levels Indicate?

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Posted on Sat, 17 Dec 2016
Question: Hi I have blood work with BUN 15 creatinine 1.27 should I be concerned?
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Answered by Dr. Panagiotis Zografakis (2 days later)
Brief Answer:
probably not...

Detailed Answer:
Hello,

if your doctor says it's normal then you shouldn't worry. The information you've provided is not enough for a complete answer but I'll explain how it can be interpreted. The creatinine value can be affected by the renal function (obviously) but it can also be affected by other factors. One of the most important factors is muscular mass reflected in body weight. The patient's weight, age and creatinine levels can be used to calculate the estimated glomerular filtration rate (eGFR) which the value of interest regarding renal function.

So if your weight is 80Kg then your eGFR is 86mL/min.
If your weight is 60Kg then your eGFR is 64mL/min.
If your weight is 100Kg then your eGFR is 107mL/in.

In certain patients 24h urine samples provide more accurate information about the GFR.

Certain transient conditions (like dehydration) may cause eGFR underestimation.

So in conclusion, if your body weight is low, then your eGFR could raise some concerns particularly if repeat measurements confirm it. If your body weight is high or you use creatine supplements then your eGFR (and renal function) are probably just fine.

I hope it helps!
Please contact me again, if you'd like any clarification or further information.

Kind Regards!
Note: For further queries related to kidney problems and comprehensive renal care, talk to a Nephrologist. Click here to Book a Consultation.
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Panagiotis Zografakis

Internal Medicine Specialist

Practicing since :1999

Answered : 3819 Questions

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What Do These BUN And Creatinine Levels Indicate?

Brief Answer: probably not... Detailed Answer: Hello, if your doctor says it's normal then you shouldn't worry. The information you've provided is not enough for a complete answer but I'll explain how it can be interpreted. The creatinine value can be affected by the renal function (obviously) but it can also be affected by other factors. One of the most important factors is muscular mass reflected in body weight. The patient's weight, age and creatinine levels can be used to calculate the estimated glomerular filtration rate (eGFR) which the value of interest regarding renal function. So if your weight is 80Kg then your eGFR is 86mL/min. If your weight is 60Kg then your eGFR is 64mL/min. If your weight is 100Kg then your eGFR is 107mL/in. In certain patients 24h urine samples provide more accurate information about the GFR. Certain transient conditions (like dehydration) may cause eGFR underestimation. So in conclusion, if your body weight is low, then your eGFR could raise some concerns particularly if repeat measurements confirm it. If your body weight is high or you use creatine supplements then your eGFR (and renal function) are probably just fine. I hope it helps! Please contact me again, if you'd like any clarification or further information. Kind Regards!