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

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

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

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 0.94963
5-10 years 1.01326
10-15 years 1.08115
15-20 years 1.15359
20-25 years 1.23088
25-30 years 1.31335
30-35 years 1.40134
35-40 years 1.49523
40-45 years 1.59541
45-50 years 1.7023
50-55 years 1.69465
55-60 years 1.68704
60-70 years 1.67947
70-80 years 1.67193
80-90 years 1.66443
90-100 years 1.65696
>100 years 1.64953

If you want your blood test report to be interpreted by FT4 thyroid specialist, then you can upload your report. Our FT4 thyroid 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 FT4 thyroid result may be wrong. Click to know the reason in detail

Click here to know Symptoms of High FT4 thyroid

Click here to know Symptoms of High RDW SD

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

Normal RDW SD range : 39 - 46 fL

Age-wise ideal RDW SD level in blood:
Age Ideal RDW SD value
<5 years 41.613
5-10 years 44.401
10-15 years 44.202
15-20 years 44.004
20-25 years 43.806
25-30 years 43.609
30-35 years 43.413
35-40 years 43.218
40-45 years 43.024
45-50 years 45.907
50-55 years 45.701
55-60 years 45.496
60-70 years 45.292
70-80 years 45.089
80-90 years 44.887
90-100 years 44.685
>100 years 44.485

Click here to know Symptoms of High FT4 thyroid

Click here to know Symptoms of High RDW SD

Click here to upload your blood test report

Click here to consult a doctor for your Low FT4 thyroid problem

High FT4 thyroid and RDW SD 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 1.76 ng/dL for FT4 thyroid and more than 46 fL for RDW SD, 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 FT4 thyroid and RDW SD test. In most hospitals FT4 thyroid and RDW SD 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.

Click here to upload your blood test report

Click here to consult a doctor for your Low FT4 thyroid problem

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