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 DENOMINATION
- Determination of the levels of stimulant hormone of the thyroid gland (TSH)
DEFINITION
It is an analysis that is realized separately or in a general biochemistry request in the blood. It measures the quantity of hormone of origin hipofisario present in the whey.
His determination serves to discriminate that a thyroid problem is of primary origin (of the thyroid gland) or secondarily (of the hyponuptial bed).
WHY IS THE ANALYSIS REALIZED?
When the thyroid hormone (T4 or T3) they are low, the hyponuptial bed will receive an order to produce more TSH, and by it it will be raised before a primary problem of the thyroid gland.
If on the contrary because of a hemorrhage, a traumatism or tumor in the hyponuptial bed can lower this secretion and by it the thyroid gland is not stimulated and they lower the levels of T3 and T4 producing a secondary goiter to him.
His determination will serve as control when there is administered hormonal or regulatory treatment of the thyroid function. If the TSH reaches normal levels the fact is that the substitute or regulatory treatment is adapted in dose and is called the state eutiroideo.
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 STIMULANT HORMONE OF THE THYROID GLAND IN WHEY
The reference interval is from 0,4 to 4 mU/l approximately. The most used analyses methods are: radioinmunoanálisis, inmunoluminometría based on the beginning of quimioluminiscencia and other essays inmunoenzimáticos, inmunorradiométricos.
POSSIBLE DIAGNOSES IN ABNORMAL VALUES
It can appear high TSH levels in whey in:
- Congenital Hipotiroidismo
- Primary Hipotiroidismo
- Resistance to the thyroid hormone
- Thyroid impotence
It can appear low TSH levels in whey in:
- Illness of Serious
- Tirotoxicosis
- Hypofunction hipofisaria
TO SEE ALSO
WHAT DOCTOR CAN TREAT ME?
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DENOMINATION 
