Anesthesia in Caspian ponies.

This research sought to study the effects of a specific combination of anesthesia drugs on Caspian ponies, looking closely at a range of clinical and laboratory parameters. Results highlighted significant variations in certain biological markers, however, overall the anesthesia protocol was deemed acceptable and induced satisfactory recovery in the animals.

Research Design and Experimental Procedure

• The research was a prospective experimental trial which investigated the effects of a combination of anesthetic drugs on Caspian ponies. Six healthy ponies of both sexes, aged 11 +/- 3 years and weighing approximately 318 +/- 71 kg, were used in the study.
• Ponies were administered with the drugs diazepam and acepromazine for pre-medication purposes. Following a ten-minute interval, the animals were injected with a 5% solution of Sodium thiopental and anesthesia was maintained with halothane in oxygen for one hour.
• During anesthesia, the ponies’ heart and respiratory rates, mean arterial blood pressure, cardiac rhythm and signs of anesthetic depth were all monitored. Hematological and serum biochemical parameters were also evaluated.
• Additionally, urine samples were taken and examined for specific gravity and cytology at the same intervals following the administration of the anesthesia.
• The gathered data was processed through repeated measures of analysis of variance (ANOVA) to better comprehend the effects of the anesthetic protocol on the ponies.

Key Findings from the Study

• Pre-medication of the ponies led to noticeable sedation and tranquilization without any signs of agitation or excitement. However, some changes were observed during anesthesia, including an increase in heart rate and a slight drop in blood pressure.
• There were five instances of various cardiac irregularities including sinus arrhythmia and second-degree AV block. The respiratory rate decreased during anesthesia, resulting in respiratory acidosis, and a decrease in body temperature was observed.
• Despite these changes four horses had good recovery while the remaining two had satisfactory recoveries.
• In terms of biochemical changes, a significant increase was observed in blood urea nitrogen concentration at 1-3 hours post-anesthesia. Blood glucose levels were significantly elevated at 48, 72, and 96 hours post-anesthesia, with creatine kinase and aspartate aminotransferase also significantly increased at 24 and 48 hours post-anesthesia.

Conclusion of the Study

• The authors concluded that despite the observed physiological variations, the anesthetic protocol of diazepam-acepromazine, thiopental, and halothane can be employed for Caspian ponies, as it induced an acceptable level of anesthesia and facilitated a reasonable recovery.