Preparations containing Xylazine and Tiletamin-Zolazepam active ingredients were used in a pilot study involving 15 Holstein-Friesian crossbred calves of both sexes to evaluate them for the purpose of anaesthesia in computer-assisted tomography (CT). The animals were assigned to three groups of equal sizes. In Groups 1 and 2 Xylazine (Rometar) was administered intravenously vs. intramuscularly, respectively, while in Group 3 a mixture of Tiletamin-Zolazepam (1:1) (Zoletil), was administered intramuscularly. Times to lie down, of subsequent immobility, to regain consciousness and to full recovery were recorded. The physiological status of calves was monitored while they were anaesthetised. In accordance with relevant literature data, intravenous administration of Xylazine resulted in lying down and narcosis more rapidly than was the case with intramuscular application. Since only 15 minutes are required for CT examination when anaesthesia can be reversed with an antidote (e.g. Yohimbin), thus a continuous working routine can be achieved. Similarly to other species, there were substantial within-group deviations observed in the recorded parameters of the calves revealing different levels of individual sensitivity to identical doses of the anaesthetic. The preliminary results obtained in this study indicate that the Tiletamin-Zolazepam anaesthetic combination is suitable for effective application in calves for CT examination without any substantial side-effects.
|Number of pages||5|
|Journal||Magyar Allatorvosok Lapja|
|Publication status||Published - Dec 1 1999|
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