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Endocrinology |
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| Code | Test Description * Indicates send out test |
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| T495 | T4, Total Centrifugal Flotation Examination |
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| Specimen | 1 ml serum | ||||
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| Method | RIA | ||||
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| Schedule | Daily | ||||
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| T460 | Free T4 by Equilibrium Dialysis | ||||
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| Specimen | 1 ml serum | ||||
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| Method | Equilibrium Dialysis | ||||
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| Schedule | 2–4 days | ||||
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| Indication | Evaluation of thyroid status | ||||
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| SA360 | Total T3 and T4 | ||||
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| Specimen | 1 ml serum | ||||
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| Method | RIA | ||||
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| Schedule | Daily | ||||
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| SA365 | Total T3, T4, and Free T4 (ED) | ||||
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| Specimen | 2 ml serum | ||||
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| Method | RIA and Equilibrium Dialysis | ||||
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| Schedule | 2–4 days | ||||
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| SA370 | Total T4, and Free T4 (ED) | ||||
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| Specimen | 2 ml serum | ||||
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| Method | RIA and Eqlilibrium Dialysis | ||||
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| Schedule | 2–4 days | ||||
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| T940 | TRH Stimulation Test | ||||
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| Tests | Pre and Post Cortisol assays | ||||
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| Specimen | 2 ml serum for both pre and 30 minute post TRH administration | ||||
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| Method | RIA | ||||
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| Schedule | 1–2 days | ||||
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| T225 | Bile Acids, resting | ||||
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| Specimen | 1 ml serum or heparinized plasma | ||||
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| Method | Enzymatic | ||||
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| Schedule | 1–2 days | ||||
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| Indication | Useful as an indicator of decreased hepatobiliary function. | ||||
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| Interpretive Guidelines |
Elevated levels are seen with decreased hepatic function. Hepatopathies may cause mild to moderate elevations. | ||||
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| Parasite IdentificationCortisol Series / Adrenal Function | |||||
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| T435 | ACTH (endogenous level) | ||||
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| Specimen | Plasma from LT containing Aprotinin. | ||||
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| Method | RIA | ||||
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| Schedule | 7 days | ||||
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| Indication | Aids in the diagnosis of pars intermedia pituitary adenomas. | ||||
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| Comments | Use LT containing Aprotinin for sample collection, centrifuge immediately and transfer plasma to a plastic vial. (Antech will provide the necessary tubes.) Transport on ice or cold packs. Do not use any plain, uncoated glass tubes or pipettes. | ||||
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| T445 | Cortisol, resting | ||||
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| Specimen | 1 ml serum | ||||
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| Method | RIA | ||||
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| Schedule | 1–2 days | ||||
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| Comments | If animal is on Prednisone, wait 24 hours before drawing. If Methyl Prednisone acetate has
been administered, wait 6 weeks before drawing. A 24-hour or overnight dexamethasone suppression test is necessary for the diagnosis of equine Cushing’s syndrome. |
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| T450 | Dexamethasone Suppression Test (3 samples) | ||||
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| Specimen | 1 ml separated serum or heparinized plasma for each pre and post | ||||
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| Method | RIA | ||||
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| Schedule | 1–2 days | ||||
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| Indication | Dexamethasone suppression series are used to help identify pituitary adenomas of the pars intermedia. | ||||
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| Special Drawing Instructions |
24-HOUR DEXAMETHASONE SUPPRESSION (3 Samples) Draw a pre, eight-hour and 24-hour post 40mg dexamethasone IM. |
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