• Claudio C Natalini, Priscila B Da Silva Serpa, Ruben L Cavalcanti, Alexandre S Polydoro, Joanna E Griffith, Luiz C P Santos, and Anthony Nicholson.
• Companion Animal Health Centre, School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, SA, Australia.
• Vet Anaesth Analg. 2016 May 1; 43 (3): 271-80.

ObjectiveTo evaluate the potential of an intravenous (IV) sevoflurane formulation for maintenance of general anesthesia in dogs.Study DesignProspective crossover design.AnimalsSix healthy, mature, mixed-breed dogs, four males and two females, weighing 11.7 ± 3.4 kg.MethodsAnesthesia was induced and maintained with propofol IV for instrumentation. Baseline measurements were recorded before administration of either sevoflurane in oxygen (Sevo-Inh) or lipid-emulsified sevoflurane 8% v/v in 30% Intralipid IV (Sevo-E), 0.5 mL kg(-1) over 5 minutes followed by an infusion at 0.1-0.3 mL kg(-1)  minute(-1) . Dogs were breathing spontaneously. The 'up-and-down' technique was used to determine the minimum alveolar concentration (MAC) of sevoflurane. Over 120 minutes, a tail clamp was applied every 15 minutes and sevoflurane administration was adjusted depending on the response. End-tidal sevoflurane concentration and variables were recorded at 30, 60, 90, and 120 minutes: heart rate (HR), systemic arterial pressure (sAP), respiratory rate (fR ), end-tidal carbon dioxide tension, hemoglobin oxygen saturation (SaO2 ), arterial pH and blood gases, blood urea nitrogen, alanine aminotransferase, creatine kinase, gamma-glutamyl transferase, and aspartate aminotransferase.ResultsThere were no significant differences between treatments for HR, sAP, fR , SaO2 , and biochemical variables (p > 0.05). pH and HCO3-were significantly decreased, and PaCO2 increased from baseline in Sevo-E (p < 0.05). MAC was significantly lower for Sevo-E than for Sevo-Inh, although the required dose of sevoflurane (g hour(-1) ) to maintain general anesthesia was not significantly different between treatments.Conclusions And Clinical RelevanceAdministration of 8% v/v sevoflurane lipid emulsion IV was effective in maintaining general anesthesia in dogs, but resulted in moderate cardiopulmonary depression, metabolic and respiratory acidosis. The amount of sevoflurane (g hour(-1) ) required to maintain general anesthesia was significantly lower for inhaled than for IV sevoflurane.© 2015 Association of Veterinary Anaesthetists and the American College of Veterinary Anesthesia and Analgesia.

22 keywords...

hide…