Renal failure and thyroid function tests: the effects of commencing haemodialysis

Area of Science:

• Nephrology
• Endocrinology
• Internal Medicine

Background:

• Patients with chronic renal failure frequently exhibit abnormal thyroid function tests.
• The impact of improved uremic state on thyroid and pituitary function requires further investigation.

Purpose of the Study:

• To investigate thyroid and pituitary function in patients with renal failure.
• To assess the effects of regular hemodialysis on thyroid function tests in these patients.

Main Methods:

• Evaluated thyroid and pituitary function in six patients with renal failure.
• Repeated tests after initiating regular hemodialysis to observe changes.

Main Results:

• Serum thyroxine and free thyroxine levels were at the lower limit of normal before dialysis.
• These levels showed a non-significant increase post-hemodialysis.
• The TSH response to TRH decreased in most patients after dialysis, but this was not statistically significant.

Conclusions:

• Abnormalities in thyroid function tests in clinically euthyroid patients with renal failure do not appear to significantly change after initiating regular dialysis.
• The institution of regular hemodialysis has a limited impact on the observed thyroid function test abnormalities in this patient group.