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Archive for May, 2014

CHEMICAL IMMOBILISATION OF LETEA FERAL HORSES

(EQUUS CABALLUS) USING KETAMINE AND MEDETOMIDINE

ROSU O1,2, UDRESCU LA1, BIRTOIU D3, MANU E2

Summary

Thirty-five free-range feral horses were successfully remotely anaesthetised for immunocontraception using different combinations of ketamine/medetomidine with or without hyaluronidase. Only horses where fully discharged darts induced anaesthesia (without any top-up darts and/or previous deflected) were included in our study. A mean (x̅) induction time of 8.85 minutes (SD = 4.76) was recorded for a group of 28/35 horses that were immobilised with ketamine (1.45 – 3.8 mg/kg, x̅ = 2.32 mg/kg) and medetomidine (0.05 – 0.15 mg/kg, x̅= 0.09 mg/kg) and a mean induction time of 9 minutes (SD = 4.83) for another group (7/35) that received ketamine (1.25 – 2.2 mg/kg, x̅ = 1.74 mg/kg), medetomidine (0.08 – 0.17 mg/kg,  = 0.119) and hyaluronidase (2.85 – 4.4 IU/kg, x̅ = 3.64 IU/kg). Approx. 25 minutes after induction five horses in the first study group (n = 28) and two from the second (n = 7) required additional 1.4 mg/kg ketamine I.V. to achieve a deeper anaesthesia level. The mean duration of anaesthesia was 69.56 min (SD = 12.87) for the first study group and 73.8 min (SD = 20.54) for the second study group. Heart rate, respiratory rate, temperature and SpO2 were measured and recorded during recumbency. No specific antidote (atipamezole) was given, except for one individual due to critical clinical conditions. During reversal the horses were manually assisted to sternal position with the front limbs extended, which facilitated their raising. Once standing most of the horses preferred to remain stationary if not disturbed. Some tachypnoea and one case of a  stormy awakening was reported, however, there were no post-anaesthestic complications or injuries.

Chemical immob Zoovet2014 vers2_000001

Poster final Chemical immob Zoovet2014

 

Full article here:

Zoovet2014_Rosu_190-195_17042014-2

 

 

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