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[Changes in serum thyrotropin, thyroxine and triiodothyronine after complete thyroidectomy (author's transl)]
Nihon Naibunpi Gakkai Zasshi
|July 20, 1978
Summary
Following thyroidectomy, thyroid-stimulating hormone (TSH) levels rise, while thyroxine (T4) and triiodothyronine (T3) levels drop. Thyroid hormone levels decrease slowly post-surgery, indicating peripheral conversion and tissue release.
Area of Science:
- Endocrinology
- Thyroid Physiology
- Oncology
Context:
- Thyroid carcinoma treatment often involves complete thyroidectomy.
- Post-surgical monitoring of thyroid hormone levels is crucial for patient management.
- Understanding thyroid hormone dynamics after surgery informs treatment protocols.
Purpose:
- To investigate serum thyroid-stimulating hormone (TSH), thyroxine (T4), and triiodothyronine (T3) changes after complete thyroidectomy.
- To analyze the kinetics of thyroid hormone disappearance and conversion in euthyroid patients post-thyroidectomy.
- To assess the contribution of thyroidal T3 secretion to circulating levels.
Summary:
- Serum TSH levels increased progressively up to 4 weeks post-thyroidectomy, with significant rise by day 3.
- Serum T4 and T3 concentrations decreased significantly at 3 days and 18 hours, respectively.
- The rapid decline in T3 suggests significant thyroidal secretion, while slower T4 and T3 decay rates post-day 3 indicate peripheral conversion and tissue release.
Impact:
- Provides insights into thyroid hormone regulation and metabolism after total thyroidectomy.
- Highlights the importance of monitoring TSH, T4, and T3 levels in thyroid cancer patients.
- Contributes to a better understanding of the physiological adaptation following thyroid removal.