Thyroid hormones are essential for normal cellular function, and thyroidal status is usually assessed by measurement of serum concentrations of these hormones. Thyroid hormone levels are altered in a variety of ways by acute illness. In order to evaluate these changes properly and assess thyroidal status, it is essential that one understands normal thyroidal gland physiology and tests of thyroid function. After a discussion of these subjects, we review thyroid hormone bioavailability, tissue effects of thyroid hormone deficiency, and thyroid function in nonthyroidal illness.
ASJC Scopus subject areas
- Pulmonary and Respiratory Medicine