Stiftung Tierärztliche Hochschule Hannover (TiHo)

Influence of dental restoration under general anaesthesia on the low-dose dexamethasone suppression test in dogs

It was the aim of the study to assess the impact of a minor surgical intervention under general anaesthesia on results of a low-dose dexamethasone suppression test (LDDST) in dogs. Five clinically healthy dogs underwent a LDDST (standard protocol) prior and 1, 4, 7, 14 and 28 days after a dental restoration under general anaesthesia. All LDDSTs revealed negative results. On all test days after intervention some dogs had basal cortisol concentrations below the reference range. Accordingly, plasma cortisol concentrations 4 and 8 h after dexamethasone injection were noticeably lower than before surgery and often even below the lower detection limit of 2.0 ng/ml. The study results may indicate a suppressive effect of a minor surgery under general anaesthesia on cortisol measurements during LDDSTs. It may be speculated that this could possibly lead to false negative test results in the postsurgical period, although transfer of these results to clinical cases is subject to limitations.

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