What causes high BUN and low Potassium?

High BUN and low Potassium can be caused by many reasons.

If your BUN is in between 6 mg/dL and 20 mg/dL and your Potassium is in between 3.5 mmol/L and 5.1 mmol/L then you need not worry as these are the normal ranges for BUN and Potassium respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.

Normal range of BUN : 6 - 20 mg/dL

Ideal values of BUN depending on age :

Age	Ideal BUN value
<5 years	6.063
5-10 years	6.126
10-15 years	6.19
15-20 years	6.255
20-25 years	6.32
25-30 years	6.386
30-35 years	6.453
35-40 years	6.52
40-45 years	6.588
45-50 years	6.657
50-55 years	6.727
55-60 years	6.797
60-70 years	6.868
70-80 years	6.94
80-90 years	7.013
90-100 years	7.086
>100 years	7.16

*Ideal values are calculated based on our database of patient records

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Normal range of Potassium : 3.5 - 5.1 mmol/L

Ideal values of Potassium depending on age :

Age	Ideal Potassium value
<5 years	3.537
5-10 years	3.574
10-15 years	3.611
15-20 years	3.649
20-25 years	3.687
25-30 years	3.726
30-35 years	3.765
35-40 years	3.804
40-45 years	3.844
45-50 years	3.884
50-55 years	3.925
55-60 years	3.966
60-70 years	4.007
70-80 years	4.049
80-90 years	4.091
90-100 years	4.134
>100 years	4.177

High BUN and low Potassium can be caused by a lot of reasons. If you take BUN and Potassium blood tests and the results are higher than 20 mg/dL for BUN and lower than 3.5 mmol/L for Potassium, your physician may recommend more tests to figure out the problem. You might also get these tests if your physician thinks you have some other disease.

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How the BUN and Potassium Tests Are Done :

If your doctor wants BUN and Potassium tests on you, you may need to go through these tests. During the BUN and Potassium blood tests, a pathologist will put a needle into your veins and take out a small quantity of blood. A pathologist is a physician in the medical field who thoroughly studies the causes and effects of disease. Within a few hours you will get your BUN and Potassium Test reports by your pathologist.

Medical References

• Mayo Clinic – Blood urea nitrogen (BUN) test
• MedlinePlus – BUN (Blood Urea Nitrogen)
• Cleveland Clinic – Blood Urea Nitrogen (BUN): Testing, Levels & Indication