Sentences with word «nonthyroidal»

Serum TSH concentration is increased in 8 % — 10 % of dogs with nonthyroidal illness.

In contrast, falsely high serum TSH concentrations (ie, a false - positive result) are occasionally found in euthyroid dogs with nonthyroidal illness.

Peterson ME, Melián C, Nichols CE: Measurement of serum concentrations of total and free T4 in hyperthyroid cats and cats with nonthyroidal disease.

Peterson ME, Gamble, DA: Effect of nonthyroidal disease on serum thyroxine concentrations in cats: 494 cases (1988).

Additionally, some dogs with other non-thyroid diseases may have artificially low T4 and T3 values due to metabolic changes without having hypothyroidism; these cases are called nonthyroidal illness.

Every attempt should be made to exclude nonthyroidal illness before starting a therapeutic trial.

However, in dogs with substantial nonthyroidal illness, the free T4 is likely to be decreased.

Peterson ME, Melián C, Nichols CE: Measurement of serum concentrations of free thyroxine, total thyroxine, and total triiodothyronine in cats with hyperthyroidism and cats with nonthyroidal disease.

This is called «nonthyroidal illness syndrome» or «euthyroid sick syndrome,» and has no known relationship to the development of clinical hypothyroidism in dogs.

Kantrowitz LB, Peterson, ME, Melián C, Nichols R: Serum total thyroxine, total triiodothyronine, free thyroxine, and thyrotropin concentrations in dogs with nonthyroidal disease.

In addition, a variety of nonthyroidal factors (eg, nonthyroidal illness and prior administration of certain drugs) can lead to low serum thyroid hormone measurements in euthyroid dogs, cats, and other species.

However, a subnormal basal T4 concentration alone is not diagnostic; it may indicate an animal that is normal, hypothyroid, or suffering from a nonthyroidal illness with a secondary decrease in the basal T4 concentration (sick euthyroid syndrome; see below).

Testing of thyroid function should be postponed until the nonthyroidal illness is resolved.

Illness not involving the thyroid gland can alter thyroid function tests and has been labeled «nonthyroidal illness» or «euthyroid sick syndrome.»

With quantitative measurement of thyroidal 99mTc uptake, there is little to no overlap between dogs with primary hypothyroidism and dogs with nonthyroidal illness.