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Related Experiment Videos

Transient hyperthyroxinemia in symptomatic hyponatremic patients.

E Cogan, M Abramow

    Archives of Internal Medicine
    |March 1, 1986
    PubMed
    Summary

    Severe hyponatremia can cause a temporary, asymptomatic rise in serum iodothyronine levels, particularly in patients with neurological symptoms. Thyroid test results require careful interpretation in these acute cases.

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    Area of Science:

    • Endocrinology
    • Neurology

    Background:

    • Severe hyponatremia is a critical electrolyte imbalance.
    • Neurologic manifestations can occur in patients with hyponatremia.

    Purpose of the Study:

    • To investigate the relationship between severe hyponatremia and thyroid hormone levels.
    • To determine if thyroid function is altered in patients with neurologic manifestations of hyponatremia.

    Main Methods:

    • Twenty-two patients with severe hyponatremia were divided into two groups based on neurologic manifestations.
    • Serum iodothyronine, thyrotropin, and thyroxine-binding globulin levels were measured.
    • Hormone levels were compared between groups and monitored during treatment.

    Main Results:

    • Patients with neurologic manifestations showed significantly higher serum iodothyronine concentrations compared to those without.
    • Transient hyperthyroxinemia was observed in some patients with neurologic symptoms.
    • Thyroid-stimulating hormone and thyroxine-binding globulin levels remained normal.
    • Iodothyronine levels normalized within two weeks of correcting hyponatremia.

    Conclusions:

    • A transient, asymptomatic increase in serum iodothyronine levels occurs during acute, severe hyponatremia, especially with neurologic symptoms.
    • These thyroid test abnormalities resolve with correction of the hypo-osmolar state.
    • Thyroid function tests should be interpreted cautiously in patients presenting with acute, severe, symptomatic hyponatremia.

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