What does high BUN and FT4 thyroid mean in blood test?

High BUN and FT4 thyroid can be caused by numerous problems.

High levels of BUN and FT4 thyroid in the blood indicate a variety of health problems. If your blood BUN level is between 6 mg/dL to 20 mg/dL and the FT4 thyroid level is between 0.89 mg/dL to 1.76 ng/dL, then your body does not have any underlying health problems. But if BUN and FT4 thyroid levels exceed these levels, you should see a doctor immediately.

Normal BUN range : 6 - 20 mg/dL

Age-wise ideal BUN level in blood:

Age	Ideal BUN value
<5 years	6.081
5-10 years	6.163
10-15 years	6.246
15-20 years	6.33
20-25 years	6.415
25-30 years	6.502
30-35 years	6.59
35-40 years	6.679
40-45 years	6.769
45-50 years	6.86
50-55 years	6.953
55-60 years	7.047
60-70 years	7.142
70-80 years	7.238
80-90 years	7.336
90-100 years	7.435
>100 years	7.535

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

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Normal FT4 thyroid range : 0.89 - 1.76 ng/dL

Age-wise ideal FT4 thyroid level in blood:

Age	Ideal FT4 thyroid value
<5 years	0.90202
5-10 years	0.9142
10-15 years	0.92654
15-20 years	0.93905
20-25 years	0.95173
25-30 years	0.96458
30-35 years	0.9776
35-40 years	0.9908
40-45 years	1.00418
45-50 years	1.01774
50-55 years	1.03148
55-60 years	1.0454
60-70 years	1.05951
70-80 years	1.07381
80-90 years	1.08831
90-100 years	1.103
>100 years	1.11789

High BUN and FT4 thyroid levels in the blood can cause a number of health problems. Your GP may recommend follow-up tests to get an important picture of your overall health and well-being. If the results are greater than 20 mg/dL for BUN and more than 1.76 ng/dL for FT4 thyroid, you may also need some follow-up tests that will help detect the underlying disease early.

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How is a blood test performed in the lab?

Depending on the symptoms you are experiencing, your doctor may order a BUN and FT4 thyroid test. In most hospitals BUN and FT4 thyroid results can be obtained within three to six hours after blood is taken. The blood is usually drawn from a vein on the inside of the elbow or the back of the hand. Drink plenty of water before your appointment. If you experience any symptoms that you are concerned about are out of the ordinary, call your doctor immediately.