Effects of Methods Used For Blood Collection on Plasma Concentrations of Luteinising Hormone, Testosterone, And Cortisol In Male Dogs

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Abstract
The effects of two putative stressors relative to the collection of blood, namely the environment of the treatment room and the pain associated with venepuncture, on plasma levels of luteinising hormone (LH), testosterone and cortisol were examined in six trained male experimental dogs. Blood samples were collected from the dogs in a treatment room as well as in the kennels (control), and by venepuncture as well as via an indwelling’ intravenous catheter (control). No significant influence of either stressor on plasma levels of LH, testosterone or cortisol was found Plasma concentrations of these hormones varied considerably both between and within dogs. Mean (± SEM; n = 6) plasma concentrations were 4.3 ± 1.0 μg/l for LH, 4.6 ± 1.9 nmol/l for testosterone and 68 ± 10 nmol/l for cortisol It was concluded that the putative stressors, the environment of the treatment room and the pain associated with venepuncture, did not significantly influence plasma levels of LH, testosterone or cortisol in trained male experimental dogs.

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