Antiemetic Effect of Dexamethasone in Dogs Sedated with Xylazine

Xylazine hydrochloride로 진정시킨 개에 대한 Dexamethasone의 항구토 효과

  • Yang Jung-hoon (College of Veterinary Medicine, Kyungpook National University) ;
  • Kang Han-sem (College of Veterinary Medicine, Kyungpook National University) ;
  • Bae Jae-sung (College of Veterinary Medicine, Kyungpook National University) ;
  • Song Chang-hyun (College of Veterinary Medicine, Kyungpook National University) ;
  • Kim Jung-eun (College of Veterinary Medicine, Kyungpook National University) ;
  • Jin Hee-kyung (College of Veterinary Medicine, Kyungpook National University) ;
  • Jang Kwang-ho (College of Veterinary Medicine, Kyungpook National University)
  • Published : 2005.06.01

Abstract

This prospective study aimed to assess the efficacy of dexamethasone to prevent xylazine induced emesis in dogs. The antiemetic effect of graded, single high-dose intravenous dexamethasone against xylazine hydrochloride was studied. Clinically healthy mixed breed dogs that weighed $ 4.64\pm1.25kg$ were used in this study. Food and water were given 3 hours before the experiment. Venous blood specimens were collected from all experimental animals for hema-tological and blood chemical test pre- and post-experiment. Twenty-eight experimental animals were randomly divided into 4 groups; the group treated with 0.2ml/kg of normal saline (Control group), the groups treated with 1mg/kg (D1 group), 2mg/kg (D2 group) and 4 mg/kg of dexamethasone (D4 group). Three doses of the dexamethasone or normal saline was administered intravenousely to each group and after 5 minutes, xylazine (2.2 mg/kg) was administered intramuscularly. The time until onset of the first emetic episode and rate of emesis were investigated. At the same time, the extent of sedation was scored subjectively 5, 15, 30 and 60 minutes after injection of xylazine hydrochloride using Visual Sedation Score. The time until onset of the first emetic episode was $203.25\pm11.35$ sec in Control group, $187.33\pm48.0l$ sec in D1 group and 218.33± 13.58 sec in D2 group. The rate of xylazine induced emesis were $57\%$ in Control group and $43\%$ in D1 and D2 group respectively. On the other hand, any emetic episodes were not observed in 04 group. At extent of sedation score, all experimental animals especially including the animals in D1 group were highly sedated at 15 minutes after administration of xylazine hydrochloride. Hematological and blood chemical values showed normal ranges pre- and post-experiment. We concluded that prior treatment with 4 mg/kg of dexamethasone hardly caused xylazine-induced emesis without disturbing the sedative effect of xylazine in dogs.

Xylazine hydrochloride로 진정한 개에서 발생하는 구토에 대한 dexamethasone의 항구토 효과를 평가하고자 본 실험을 수행하였다. $4.64\pm1.25kg$의_임상적으로 건강한 28마리 잡종견을 사용하였으며, 사료공급과 음수급여는 실험 3시간 전 실시하였다. 실험 전과 추 정맥에서 채혈하여 혈액검사와 혈청화학검사를 실시하였다. Dexamethasone 1 mg/kg (D1군), 2mg/kg (D2군), 4mg/kg (D4군) 또는 생리 식염수 0.2ml/kg (Control군)를 정맥내 주사하고 5분 후에 xylazine hydrochloride를 근육내 주사하여 진정시켰다. 각각 구토 발생시간과 구토 유무를 측정하였고, xylazine hydrochloride 진정 후 5, 15, 30, 60분에 Visual Sedation Score를 사용하여 진정정도를 평가하였다. 구토 발생시간은 대조군에서 $203.25\pm11.35$초였고, D1군과 D2군에서 각각 $187.33\pm48.01$초와 $218.33\pm13.58$초로 차이가 없었다. 구토율은 D4군 전체 실험견이 구토를 보이지 않는 반면, Control군 실험견 중 $57\%$가 구토를 하였고, D1군과 D2군 실험견들은 각각 $43\%$구토율을 나타냈다. 진정 정도는 실험군에 관계없이 dexamethasone을 투여한지 15분 후에 높은 수치를 나타냈다. 혈액검사, 혈청화학검사결과는 정상수치를 보였다. 이상 결과로, 개에서 전처치로 사용한 4mg/kg용량 dexamethasone은 진정작용에 관계없이 xylazine hydrochloride가 유발시키는 구토를 예방한다는 것을 알 수 있다.

Keywords

References

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