Lege Artis Medicinae

[Thyroid disorders during pregnancy]


DECEMBER 21, 2011

Lege Artis Medicinae - 2011;21(12)

[The hormones of the thyroid gland play a basic role in human reproduction and in the early development of the fetal brain, too. The frequency of hypo- and hyperthyroidism occuring in a pregnancy is between 1-2 per cent. Abnormal maternal thyroid function could result in harmful effects for both the mothers and their offsprings. An illness (gestational throphoblast disease) that is known to have an influence on the maternal thyroid function. Thyroid diseases occuring in pregnancy can result in diagnostical problems: the existing complaints and symptoms may be misdiagnosed as a consequence of pregnancy. Because of the changes in thyroid metabolism, which are typical to pregnancy, the analysis of the results of thyroid function may be difficult. Several diagnostical and therapeutical procedures (i. e. radioiodine techniques) are absolutely contraindicated during pregnancy. In the case of thyroid hormone replacement therapy one must take into consideration the continously changing maternal demand. Propylthiouracil is the choice of therapy regarding the treatment of the hyperthyreoidism during pregnancy. The incidence of thyroid cancer in pregnancy is 1 per 1000. Pregnancy itself does not appear to increase the risk of malignant tranformation or alter the course of thyroid cancer. The preferred period of the surgical intervention of the thyroid gland is the second trimester of the pregnancy. The introduction of a thyroid functional test (thyroid-stimulating hormone) as a screening method in the first trimester would be advisable in our country. Achieving this new procedure would reflect and expand a way of thinking in respect of prevention in our pregnancy care practice.]



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[INTRODUCTION - Shift workers have an impaired circadian rhythm, which might have an adverse effect on their health. In order to assess cardiometabolic risk in shift workers, a cross-sectional study was performed among active workers (aged 25-66 years, with a minimal shift working experience of 5 years). METHODS - In total 481 workers (121 men, 360 women) registered by the occupational health service were enrolled in our study. Most participants worked in the light industry (58.2%) or in public service (23.9%). Following questionnaire-based data recording, anthropometric measurements and physical examination were performed and fasting venous blood sample was taken for measuring laboratory parameters. Data from shift workers (n=234, 54 men and 180 women, age: 43.9±8.1 years) were compared with those of day workers (n=247, 67 men and 180 women, age: 42.8±8.5 years). RESULTS - Compared with day workers, shift workers had bigger weight (76.6±16.1 vs 73.9±17.6 kg; p<0.05), higher BMI index (27.5±5.3 vs 26.0±4.9 kg/m2; p<0.01) and systolic blood pressure (123±19 vs 119±16 mmHg, p<0.01), and higher prevalence rate of diabetes (4.3 vs 1.2 %; p<0.05) and cardiovascular diseases (3.8 vs 0.8 %; p<0.05). In addition, the proportion of participants who performed regular physical activity was lower (20.6 vs 38.7 %; p<0.001) and that of current smokers were higher (35.0 % vs 19.5 %; p<0.001) in shift workers than in day workers. In laboratory findings, only one difference has been found: HDL-cholesterol level was lower among women (shift workers versus workers: 1.56±0.32 vs 1.68±0.36 mmol/l; p<0.01). CONCLUSION - Long-term shift work (day-night) results in a less healthy lifestyle and worse cardiometabolic risk factors compared with day work. Thus, our study highlights the importance of measures for preventing cardiovascular diseases in shift workers.]

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