What causes high BUN and low Bilirubin direct?

High BUN and low Bilirubin direct can be caused by many reasons.

If your BUN is in between 6 mg/dL and 20 mg/dL and your Bilirubin direct is in between 0 mg/dL and 0.2 mg/dL then you need not worry as these are the normal ranges for BUN and Bilirubin direct 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	6.061
5-10 years	6.123
10-15 years	6.185
15-20 years	6.248
20-25 years	6.312
25-30 years	6.376
30-35 years	6.441
35-40 years	6.507
40-45 years	6.573
45-50 years	6.64
50-55 years	6.708
55-60 years	6.776
60-70 years	6.845
70-80 years	6.915
80-90 years	6.986
90-100 years	7.057
>100 years	7.129

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

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Normal range of Bilirubin direct : 0 - 0.2 mg/dL

Ideal values of Bilirubin direct depending on age :

Age	Ideal Bilirubin direct value
<5 years	0.11112
5-10 years	0.11225
10-15 years	0.11339
15-20 years	0.11455
20-25 years	0.11572
25-30 years	0.1169
30-35 years	0.11809
35-40 years	0.11929
40-45 years	0.12051
45-50 years	0.12174
50-55 years	0.12298
55-60 years	0.12423
60-70 years	0.1255
70-80 years	0.12678
80-90 years	0.12807
90-100 years	0.12938
>100 years	0.1307

High BUN and low Bilirubin direct can be caused by a lot of reasons. If you take BUN and Bilirubin direct blood tests and the results are higher than 20 mg/dL for BUN and lower than 0 mg/dL for Bilirubin direct, 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 Bilirubin direct Tests Are Done :

If your doctor wants BUN and Bilirubin direct tests on you, you may need to go through these tests. During the BUN and Bilirubin direct 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 Bilirubin direct Test reports by your pathologist.