What causes high Hematocrit and low FT3 thyroid?

High Hematocrit and low FT3 thyroid can be caused by many reasons.

If your Hematocrit is in between 40 % and 50 % and your FT3 thyroid is in between 2.3 pg/mL and 4.2 pg/mL then you need not worry as these are the normal ranges for Hematocrit and FT3 thyroid respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.

Some examples of conditions that can increase or decrease Hematocrit levels include:

• Damage to the bone marrow
• Kidney failure
• Excessive destruction of red blood cells
• Chronic inflammatory diseases
• Congenital heart disease

Hematocrit treatment - Click to read 10 GOLDEN ARTICLES on Anemia

Normal range of Hematocrit : 40 - 50 %

Ideal values of Hematocrit depending on age :

Age	Ideal Hematocrit value
<5 years	40.876
5-10 years	41.771
10-15 years	42.686
15-20 years	43.621
20-25 years	44.576
25-30 years	45.552
30-35 years	46.55
35-40 years	47.569
40-45 years	48.611
45-50 years	49.676
50-55 years	49.652
55-60 years	49.628
60-70 years	49.604
70-80 years	49.58
80-90 years	49.556
90-100 years	49.532
>100 years	49.508

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

Normal range of FT3 thyroid : 2.3 - 4.2 pg/mL

Ideal values of FT3 thyroid depending on age :

Age	Ideal FT3 thyroid value
<5 years	2.35
5-10 years	2.401
10-15 years	2.454
15-20 years	2.508
20-25 years	2.563
25-30 years	2.619
30-35 years	2.676
35-40 years	2.735
40-45 years	2.795
45-50 years	2.856
50-55 years	2.919
55-60 years	2.983
60-70 years	3.048
70-80 years	3.115
80-90 years	3.183
90-100 years	3.253
>100 years	3.324

High Hematocrit and low FT3 thyroid can be caused by a lot of reasons. If you take Hematocrit and FT3 thyroid blood tests and the results are higher than 50 % for Hematocrit and lower than 2.3 pg/mL for FT3 thyroid, 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 Hematocrit and FT3 thyroid Tests Are Done :

If your doctor wants Hematocrit and FT3 thyroid tests on you, you may need to go through these tests. During the Hematocrit and FT3 thyroid 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 Hematocrit and FT3 thyroid Test reports by your pathologist.

Medical References

• Cleveland Clinic – Hematocrit Test: What It Is, Levels, and High & Low Range
• Mayo Clinic – Hematocrit test
• MedlinePlus – Hematocrit Test