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Thyroid hormone extraction by plasma exchange: a study of extraction rate
H Puy1, J Lamoril, J M Marcelli
1Laboratoire d'Hormonologie, Hôpital Sud, Amiens, France.
Biomedicine & Pharmacotherapy = Biomedecine & Pharmacotherapie
|January 1, 1992
Summary
Plasma exchange efficiency for hyperthyroidism treatment depends on duration. Measuring hormone levels post-exchange is not useful for assessing thyroid hormone loss.
Area of Science:
- Endocrinology
- Nephrology
- Internal Medicine
Background:
- Severe hyperthyroidism management requires effective thyroid hormone removal.
- The optimal duration and efficiency of plasma exchange (PE) for hyperthyroidism are not well-defined.
Purpose of the Study:
- To evaluate the extraction rate and efficiency of thyroid hormone removal during plasma exchange.
- To determine the necessary duration of plasma exchange for maximal therapeutic effect in hyperthyroidism.
Main Methods:
- Conducted seven plasma exchange sessions in two hyperthyroid patients and three euthyroid subjects.
- Performed serial plasma sampling to measure thyroid hormone concentrations before, during, and after exchanges.
- Analyzed hormonal removal rates throughout the plasma exchange procedure.
Main Results:
- The rate of thyroid hormone removal did not significantly decrease during the plasma exchange sessions.
- The overall efficiency of hormone extraction was directly correlated with the duration of the plasma exchange.
- Post-exchange plasma thyroid hormone concentrations were not reliable indicators of hormone loss due to potential lack of significant change.
Conclusions:
- Plasma exchange duration is a critical factor in achieving optimal efficiency for thyroid hormone extraction.
- Relying solely on post-exchange hormone levels may underestimate the actual hormone removal achieved during plasma exchange.