What does high RDW SD and FT4 thyroid mean in blood test?

High RDW SD and FT4 thyroid can be caused by numerous problems.

High levels of RDW SD and FT4 thyroid in the blood indicate a variety of health problems. If your blood RDW SD level is between 39 fL to 46 fL and the FT4 thyroid level is between 0.89 fL to 1.76 ng/dL, then your body does not have any underlying health problems. But if RDW SD and FT4 thyroid levels exceed these levels, you should see a doctor immediately.

Normal RDW SD range : 39 - 46 fL

Age-wise ideal RDW SD level in blood:
Age Ideal RDW SD value
<5 years 39.722
5-10 years 40.457
10-15 years 41.205
15-20 years 41.967
20-25 years 42.743
25-30 years 43.534
30-35 years 44.339
35-40 years 45.159
40-45 years 45.994
45-50 years 45.978
50-55 years 45.963
55-60 years 45.947
60-70 years 45.931
70-80 years 45.916
80-90 years 45.9
90-100 years 45.884
>100 years 45.868

If you want your blood test report to be interpreted by RDW SD specialist, then you can upload your report. Our RDW SD expert will provide you with the most accurate interpretation of your blood test results and treatment within 12 hours. Upload blood test report now

Your RDW SD result may be wrong. Click to know the reason in detail

Click here to know Symptoms of High RDW SD

Click here to know Symptoms of High FT4 thyroid

Besides Lab test failures, there are many other reasons for inaccurate blood results. Know the common reasons for inaccurate blood test results

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 0.90647
5-10 years 0.92324
10-15 years 0.94032
15-20 years 0.95772
20-25 years 0.97544
25-30 years 0.99349
30-35 years 1.01187
35-40 years 1.03059
40-45 years 1.04966
45-50 years 1.06908
50-55 years 1.08886
55-60 years 1.109
60-70 years 1.12952
70-80 years 1.15042
80-90 years 1.1717
90-100 years 1.19338
>100 years 1.21546

Click here to know Symptoms of High RDW SD

Click here to know Symptoms of High FT4 thyroid

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High RDW SD 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 46 fL for RDW SD 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 RDW SD and FT4 thyroid test. In most hospitals RDW SD 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.

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