[Cardiorespiratory and sedation evaluation of the combination of dexmedetomidine-butorphanol-midazolam or detomidine butorphanol-midazolam in collared peccaries (Pecari tajacu)]

ABSTRACT

The study compared the cardiorespiratory, hemogasometric and sedative effects of the combination of midazolam (0.41mg/kg) and butorphanol (0.31mg/kg) plus detomidine (157μg/kg) (DTMB) or dexmedetomidine (36μg/kg) (DXMB) in collared peccaries. Collared peccaries (n= 20) were divided into two groups, either DTMB or DXMB. The variables (FC, f, PAM, SpO₂, EtCO₂ and TR) were evaluated after application of the drugs. Sedation was assessed by visual analogue scale, muscle relaxation, posture and auditory response. ANOVA followed by paired t-test (parametric) and Mann Whitney Rank Sum Test (non-parametric) with P< 0.05 were performed. No statistical difference was observed for the latency period. A significant increase was observed between groups for the variables f, PAM and SpO₂ with higher values for DTMB and EtCO₂ with higher values for DXMB. The two groups presented a reduction in HR and lactate concentration, and an increase in bicarbonate concentration. SpO₂ remained below 90% throughout the experiment in both groups. The animals of the two groups presented deep sedation and maximum muscle relaxation. It is concluded that the two protocols tested provided adequate sedation and could be indicated for chemical containment of collared peccaries.

Keywords:
alpha-2 adrenergic agonists; anesthesia; collared peccaries