No abstract available.
Thyroid Function Tests* ; Thyroid Gland*

No abstract available.
Thyroid Function Tests* ; Thyroid Gland*

Background: The interpretation of thyroid hormone function during pregnancy is difficult due to its physiologic changes. Differences in iodine status in previous studies led to different intervals; therefore the use of trimester-specific, method-specific and probably country-specific reference values is advocated. Objective: To establish trimester-specific reference interval for thyroid function tests in pregnant Filipino women. Methodology: Six hundred sixteen pregnant patients (5–40 weeks gestation) attending a tertiary center were recruited. Level of serum thyroid stimulating hormone (TSH) was measured using immunoradiometric assay while free thyroxine (FT4), free triiodothyronine (FT3) and thyroid peroxidase antibodies (TPOAb) were measured by radioimmunoassay method. Main outcome measures are trimester-specific reference interval based on 2.5th and 97.5th percentiles for TSH, FT4 and FT3 among TPOAb-negative pregnant patients. Results: The reference intervals for each trimester were as follows: TSH (0.05-4.24, 0.13-3.95, and 0.20-3.00 uIU/mL); FT4 (9.80-21.88, 9.10-18.95 and 9.16-18.64 pmol/L) and FT3 (2.40-6.20, 2.77-5.00 and 2.09-3.70 pmol/L). FT4 and FT3 are strongly and negatively correlated with age of gestation (p=<0.01and <0.01 respectively). No correlation is found with TSH and age of gestation (p=0.52). Conclusions Trimester-specific intervals among pregnant Filipino women are different from their non-pregnant counterparts and laboratory cutoffs. Thus, these reference values should be used in the country.
Thyroid Function Tests

The study was conducted in 82 simple goiter patients and 91 patients with Basedow’s disease after at least one year using iodized salt daily. The result showed:- The uptake of radioactive iodine (RAIU) by the thyroid gland of simple goiter and patients with Basedow’s disease decreased after 2 and 24 hours taking an oral dose of radioactive iodine, specially in simple goiter patients decreased 40-50%. -The serum concentrations of T3, T4, TSH were following: in simple goiter patients, the serum concentrations of T3 and TSH were little decreased and the T4 serum concentration was increased. However, all the values were still in the normal range of euthyroidism. In patients with Basedow’s diseased the serum concentrations of T3,T4,TSH have not been changed
Nuclear Medicine ; Thyroid Function Tests

The thyroid function was evaluated by the radio angiography. This method involved the use of intravenous Tc- 99 m gamma camera with the image display of 1 picture/ second or 2 pictures/second has been setup before. The picture and the duration of the first radioactive transfer into the carotid and duration of radioactive transfer from carotid to the thyroid were monitored to evaluate the thyroid function.
Radionuclide Angiography ; Thyroid Function Tests

Some methods of diagnosis by using the nuclear medicine have been applied in Vietnam including the functional diagnosis in vivo, the image writing and in vitro method.
Nuclear Medicine ; Thyroid Function Tests

No abstract available.
Prevalence* ; Thyroid Function Tests* ; Thyroid Gland*

The authors present the results of clinical recovering and hormonal changing at 98 patients with Basedow’ treated by I-131. The clinical clearly and quickly changed symptoms were putting on body weight, decreasing finger’s tremor, cardiovascular troubles. The volume of goiter and opthalmological signes decreasing more slowly. The seum concentrations of TSH, T3, T4, FT4 were clearly changed related to patients’s status (euthyrosis or hyperthyroidism) after treatment.
Graves Disease ; Thyroid Function Tests ; nuclear medicine

Thyrotoxicosis (thyroid crisis) is a known cause of sudden death; however, only a few cases of death resulting from thyrotoxicosis have been reported. Histopathologic examination and postmortem thyroid function tests may be helpful in postmortem diagnosis, but their usefulness seems to be limited. We report three autopsy cases associated with thyrotoxicosis.
Autopsy ; Death, Sudden ; Thyroid Crisis ; Thyroid Function Tests ; Thyrotoxicosis

BACKGROUND AND OBJECTIVES: The level of thyroid-stimulating hormone (TSH)-stimulated thyroglobulin (Tg) after thyroid hormone withdrawal (THW) is the most sensitive marker for detecting recurrence of differentiated thyroid cancer (DTC). In DTC, Tg production is regulated by TSH; however, TSH values after THW are never identical, even in the same patient. The objective of this study was to evaluate the influence of TSH on Tg levels after THW. MATERIALS AND METHODS: TSH and Tg concentrations were measured twice at 2 and 3 weeks after THW in 309 patients with DTC. TSH and Tg levels at these time points were compared. The percent change in TSH (ΔTSH) and change in Tg level (%ΔTg) from 2 to 3 weeks after THW were calculated, and Pearson's correlation coefficients were calculated to determine whether ΔTSH could affect %ΔTg. Tg cutoff value for diagnostic imaging was 2 ng/mL. RESULTS: The TSH and Tg values at 3 weeks were significantly higher than those at 2 weeks after THW. Tg values increased significantly to >2 ng/mL after 1 week in 38.5% of the patients with Tg values of 0.2-2 ng/mL at 2 weeks after THW. In patients with Tg values ≥2 ng/mL at 2 weeks after THW, Tg values increased significantly after an additional week of THW. ΔTSH correlated significantly with %ΔTg. CONCLUSION: TSH values differed according to time after THW, and Tg values differed significantly according to TSH values. Therefore, TSH values should be considered carefully when interpreting the meaning of Tg levels in patients with DTC.
Diagnostic Imaging ; Humans ; Recurrence ; Thyroglobulin* ; Thyroid Function Tests ; Thyroid Gland* ; Thyroid Neoplasms* ; Thyrotropin*