Cats with normal thyroid function will have a reduction in T4 concentration of approximately 50% between the first and second blood samples. If the cat has hyperthyroidism, there will be no decrease in thyroid hormone concentration in the second blood sample.here are a number of potential reasons for this. Thyroxine levels in the blood naturally fluctuate throughout the day, depending on the metabolic needs of the cat. If your cat has a mild or early case of hyperthyroidism, the thyroxine concentration may occasionally 'dip' into the normal range.
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1 If a wet setup is considered necessary to humidify inspired gases, humidification units that do not require the use of sterile water bags can be considered. 2  Some manufacturers offer wet humidification setups with self-contained plastic bottles of sterile water for inhalation, so bags of sterile water are not required.here appears to be a failure among healthcare practitioners to recognize the danger of infusing plain sterile water intravenously. Bags of sterile water for injection and inhalation also are being mistaken for intravenous (IV) solutions. Sterile water is hypotonic (0 mOsm/L).