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Serum Fructosamine Concentration in Uncontrolled Hyperthyroid Diabetic Cats Is within the Population Reference
Arnon Gal1, Brie Trusiano2, Adrienne F French3
1Institute of Veterinary, Animals and Biomedical Sciences, Massey University, Tennent Drive, Palmerston North 4442, New Zealand. a.gal@massey.ac.nz.
Veterinary Sciences
|October 24, 2017
Summary
In diabetic cats, a normal fructosamine level may indicate concurrent hyperthyroidism, not controlled diabetes. Veterinarians should consider other factors besides diabetes that affect fructosamine levels in cats.
Area of Science:
- Veterinary Medicine
- Endocrinology
- Companion Animal Health
Background:
- Diabetes mellitus is a prevalent feline endocrinopathy causing hyperglycemia.
- Stress-induced hyperglycemia can mimic diabetes, complicating diagnosis.
- Fructosamine offers a stress-independent measure of glycemic control but can be influenced by other factors.
Purpose of the Study:
- To compare fructosamine concentrations in diabetic and non-diabetic cats with and without hyperthyroidism.
- To assess the impact of sex, age, and population on fructosamine variability.
- To investigate the interplay between feline diabetes and hyperthyroidism concerning fructosamine levels.
Main Methods:
- Retrospective study design.
- Analysis of serum fructosamine concentrations.
- Comparison of fructosamine levels across different feline cohorts (diabetic, non-diabetic, hyperthyroid, euthyroid).
Main Results:
- Hyperthyroid diabetic cats had mean serum fructosamine within the reference interval (332 ± 24 µmol/L).
- Euthyroid diabetic cats showed significantly higher mean fructosamine (527 ± 10 µmol/L).
- Diabetes explained only about 50% of fructosamine variance; age, sex, and population had minor effects.
Conclusions:
- Normal fructosamine in a diabetic cat warrants investigation for concurrent hyperthyroidism.
- Veterinary clinicians must consider non-diabetic factors influencing serum fructosamine.
- Accurate diagnosis requires evaluating fructosamine in conjunction with other clinical parameters.
