Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: thyrotropin

Sortuj według:

Ogranicz wyniki do:

Thyroid hormone and thyreotropin (TSH) association with densitometric parameters in children

Porwik E., Matusik P., Drzyzdzyk K.

Journal of Medical Informatics & Technologies

2009

Vol. 13

141--144

The influence of TSH on bones is still vastly unknown and the information that is known is considered controversial. This important relationship has not been studied in detail. The aim of our research was to assess the correlation between TSH, thyroid hormone and bone mineral density in children measured by DXA scanning. Our study group included 36 children (16 girls and 20 boys) mean age 12.9 š 3.3 years. Basic anthropometrical measurements were performed (height, weight, body mass index-BMI), in all subjects. Blood was collected and measured for TSH and FT4. Bone mineral density of lumbar spine (L2-L4 BMD) and total body (Total Body BMD) were measured by DXA and expressed as bone mineral content (BMC [g]) and bone mineral density (BMD [g/cm2]). BMD Z-Score was also calculated. Correlation between the parameters obtained by DXA and anthropometrical data, TSH and thyroid hormone concentration were calculated. A statistically significant positive correlation was observed between height, weight and BMI and BMD which was calculated. Weight and BMI also had a statically significant correlation with Z-Score and total bone mineral content (BMC – expressed in grams). There was a statistically significant positive correlation between TSH level and Z-Score for both L2-L4 lumbar spine and for total body. TSH did not correlate significantly with BMD [g/cm2] and BMC [g]. FT4 was negatively and significantly correlated with Z-Score for both L2-L4 lumbar spine and for total body. There was also no significant correlation between FT4 and BMD [g/cm2] and BMC [g]. Conclusion: 1. Thyroid stimulating-hormone (TSH) appears to be associated with maintenance of bone mineral density in children. 2. BMD Z-Score especially from L2-L4 lumbar spine assessed by DXA scanning is correlated best with hormonal and biochemical factors potentially influencing bone mineralization in children.

Dylematy diagnostyki czynności tarczycy

Solnica B.

Laboratorium - Przegląd Ogólnopolski

2008

nr 10

56--59

Schorzenia tarczycy wiodące do zaburzeń jej czynności endokrynnej występują często. Laboratoryjna ocena zaburzeń czynności tarczycy jest oparta na oznaczaniu stężenia we krwi hormonu tyreotropowego (TSH) oraz wolnej frakcji tyroksyny (FT4) i trijodotyrniny (FT3). Interpretacja wyników jest zgodna z zasadami regulacji wydzielania TSH, w tym ujemnego sprzężenia zwrotnego ze stężeniem FT3 i FT4. Ocena czynności tarczycy w oparciu o te badania może być utrudniona przy zaburzonej funkcji osi podwzgórze - przysadka - tarczyca. Wyniki powinny być ostrożnie interpretowane w ciężkich chorobach pozatarczycowych i w ciąży. Odmiennego podejścia wymaga monitorowanie leczenia substytucyjnego i tyreostatycznego. Wartości decyzyjne stężenia TSH powinny uwzględniać zmienność populacyjną i być dobierane empirycznie. Odrębny problem stanowi metodyka oznaczania wolnych hormonów tarczycy, która wymaga udoskonalenia.

Diseases of the thyroid gland leading to its endocrine dysfunction are a very common ailment. Labaratory assessment of thyroid dysfunction is based on thyrotropin (TSH), free fractions of thyroxine (FT4) and triiodothyroine (FT3) blood concentration measurements. The interpretation of the results takes place in accordance with the rules of regulation of TSH secretion including negative feedback with FT3 and FT4 levels. However, the assessment of thyroid function based on these tests may be complicated in the case of the dysfunction of the hypothalamic- pituitary- thyroid axis. The results should be interpreted carefully in the case of severe nonthyroidal disorders, as well as during pregnancy. The monitoring of the replacement or thyrostatic treatment requires a different approach. The decision values of TSH concentration should comply population variability and be established empirically. Another issue makes the methodology of free thyroid hormones assays, which are in need of further improvement.