Serum thyroxine and thyroid-stimulating hormone concentration in hyperthyroid cats that develop azotaemia after radioiodine therapy

被引：29
作者：
Peterson, M. E. [1 ,2 ]
Nichols, R. [1 ,3 ]
Rishniw, M. [2 ,4 ]
机构：
[1] Anim Endocrine Clin, New York, NY 10025 USA
[2] Cornell Univ, Coll Vet Med, Dept Clin Sci, Ithaca, NY 14853 USA
[3] Antech Diagnost, Lake Success, NY 11042 USA
[4] Vet Informat Network, Davis, CA 95615 USA
来源：
JOURNAL OF SMALL ANIMAL PRACTICE | 2017年 / 58卷 / 09期
关键词：
TC-99M PERTECHNETATE SCINTIGRAPHY; GLOMERULAR-FILTRATION-RATE; UNITED-STATES POPULATION; RENAL-FUNCTION; SUBCLINICAL HYPOTHYROIDISM; CANINE HYPOTHYROIDISM; THYROTROPIN CONCENTRATIONS; IATROGENIC HYPOTHYROIDISM; EQUILIBRIUM DIALYSIS; RADIOACTIVE IODINE;
D O I：
10.1111/jsap.12695
中图分类号：
S85 [动物医学（兽医学）];
学科分类号：
0906 ;
摘要：
OBJECTIVES : The objectives of this study were to determine which serum thyroid hormone test best identifies iatrogenic hypothyroidism in cats that develop azotaemia after radioiodine treatment and to determine which thyroid test best differentiates these azotaemic, hypothyroid cats from azotaemic, radioiodine-treated euthyroid cats, as well as from azotaemic cats with chronic kidney disease and no history of thyroid disease. MATERIALS AND METHODS : A total of 42 hyperthyroid cats that developed azotaemia (serum creatinine >= 220 mu mol/L) after radioiodine treatment had serum concentrations of thyroxine and free thyroxine by dialysis and thyroid-stimulating hormone measured at 3, 6 and 12 months. Iatrogenic hypothyroidism was confirmed (n=28) or excluded (n=14) on the basis of thyroid scintigraphy. A total of 14 cats with chronic kidney disease and 166 clinically normal cats underwent similar serum thyroid testing and scintigraphy. RESULTS : Concentrations of thyroxine and free thyroxine were lower and thyroid-stimulating hormone higher in hypothyroid cats than in all three groups of euthyroid cats (P<0.0001). Of the hypothyroid cats, thyroxine and free thyroxine concentrations were low in 15 (53.6%) and seven (25%), respectively. Low serum thyroxine and free thyroxine concentrations were also detected in seven (50%) and two (14.3%) of the cats with chronic kidney disease. Thyroid-stimulating hormone concentrations were elevated in all hypothyroid cats but remained within the reference interval in all three groups of euthyroid cats. Serum thyroid-stimulating hormone had a higher test sensitivity and specificity than either thyroxine or free thyroxine concentration. CLINICAL SIGNIFICANCE : The finding of high serum thyroid-stimulating hormone concentrations best identifies feline iatrogenic hypothyroidism and differentiates it from non-thyroidal illness syndrome in cats that develop azotaemia after treatment.
引用
收藏
页码：519 / 530
页数：12
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