Comparison of the Anesthetic Effects of Isoflurane and Sevoflurane Inhalation on the Cardiovascular System of the Common Buzzard (Buteo buteo)

摘要

The aim of this study was to compare the effects of isoflurane (ISO) and sevoflurane (SEVO) inhalation anesthesia on the cardiovascular system of the common buzzard (Buteo buteo). Fourteen common buzzards of unknown sex and age, weighing 700-900 g each, were used for the study. The buzzards were randomly divided into an ISO group and a SEVO group, each comprising 7 buzzards. The buzzards were then anesthetized by masked induction with either ISO or SEVO. After induction, all buzzards were intubated with a 2.5-mm--diameter uncuffed endotracheal tube. Anesthesia was maintained with 3% ISO or 4% SEVO in a 3 L/min flow of 100% oxygen. Before induction, immediately after induction, and at intervals of 5, 10, 15, 20, 25, and 30 min after the patients were induced, the heart rate, respiratory rate, and body temperature of the buzzards were recorded. In addition, before and during anesthesia, serum electrolytes (sodium, ionized calcium, and potassium), blood gas measurements (arterial pH, arterial partial pressure of carbon dioxide, arterial partial pressure of oxygen, bicarbonate concentration, and oxyhemoglobin saturation), and hematocrit values were evaluated in the blood samples taken from both the ISO and SEVO groups. A statistically significant decrease in body temperature was observed in both groups. A significant decrease in heart rate was observed in the ISO group. The increases in partial pressure of carbon dioxide and bicarbonate concentration were statistically significant in both groups. The effects of ISO and SEVO anesthesia on the cardiovascular and respiratory system in the buzzards were similar based on the results of this study.