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 DENOMINATION
- Determination of the levels of thyroid hormone T3.
DEFINITION
It is an analysis that is realized separately or in a general biochemistry request in the blood. It measures the quantity of thyroid hormone T3 present in the whey.
The triyodotironina (T3) is a hormone produced by the gland thyroid gland and she plays an important role in the corporal control of the metabolism.
WHY IS THE ANALYSIS REALIZED?
This study is realized like part of an evaluation of the thyroid function and the doctor can arrange it if the person has signs of a thyroid illness. The function of the gland thyroid gland is complex and it depends on the action of many different hormones, including the stimulant hormone of the thyroid gland (TSH) and the T4.
Sometimes, when the function of the thyroid gland is examined, it can be useful to measure both the T3 and the T4. For example, in some cases of hyperthyroid goiter the T3 it can be raised, but the T4 can be normal.
The examination of T3 measures the T3 that is joined to proteins and free in the blood.
SKILL OF SECURING
To realize this analysis to be on an empty stomach is not needed.
- It is possible to realize the capture in an appropriate place (consultation, clinic, hospital) but sometimes it is realized in the proper domicile of the patient.
- To realize the capture it is needed of locating an appropriate vein and in general there are used the veins placed in the flexura of the elbow. The person entrusted to take the sample will use sanitary gloves, a needle (with a syringe or pipe of extraction).
- It will put a tortor (tape of gum - latex) in the arm so that the veins retain more blood and turn out to be more visible and accessible.
- It will clean the area of the prick with an antiseptic one and by means of a palpación it will locate the appropriate vein and will gain access to her with the needle. They will release the tortor.
- When the blood flows for the needle the sanitary one will realize an aspiration (by means of the syringe or by means of the application of a pipe with gap).
On having finished the capture, it extracts the needle to itself and the area is pressed with a cotton or similar torunda to favor the coagulation and it will indicate him to itself that flexione the arm and the area pressed with a Band-Aid supports for some hours.
PROBLEMS AND POSSIBLE RISKS
- The securing by means of a prick of the vein can produce certain pain.
- The possible difficulty in finding the appropriate vein can give place to several pricks.
- Appearance of a haematoma (bruise or cardinal) in the extraction area, is due usually to the fact that the vein has not closed well after the later pressure and blood has kept on going out producing this problem. Type Hirudoid can apply an ointment to itself ® or Trombocid ® in the area.
- Inflammation of the vein (phlebitis), sometimes the vein turns out to be shaken, well be for a cause merely physically or why it has become infected. It will have to support the relaxed area a few days and type Hirudoid can apply an ointment to itself ® or Trombocid ® in the area. If the problem persists or appears fever will have to consult it with his doctor.
NORMAL VALUES OF T3 EN WHEY
The T3 decides for radioinmunoanálisis, with a normality interval between 1,2 and 3,4 nmol/l (75 to 220 ng/dl).
POSSIBLE DIAGNOSES IN ABNORMAL VALUES
It can appear high levels of T3 in whey in:
- Illness of Serious
- Tirotoxicosis
- Thyroid cancer
It can appear low levels of T3 in whey in:
- Hypothyroid goiter
- Long illness
- Undernourishment
TO SEE ALSO
WHAT DOCTOR CAN TREAT ME?
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DENOMINATION 
