Assessment of cardiac troponin I and C-reactive protein concentrations associated with anesthetic protocols using sevoflurane or a combination of fentanyl, midazolam, and sevoflurane in dogs |
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| Authors: | Ashley B Saunders DVM Diplomate ACVIM rew S Hanzlicek DVM Elizabeth A Martinez DVM Diplomate ACVA Mark J Stickney DVM Jörg M Steiner Drmedvet PhD Diplomate ACVIM Diplomate ECVIM-CA Jan S Suchodolski Drmedvet PhD & Geoffery T Fosgate† DVM PhD Diplomate ACVPM |
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| Institution: | Departments of Small Animal Clinical Sciences and;
Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, USA |
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| Abstract: | ObjectiveTo report serum cardiac troponin I (cTnI) and C-reactive protein (CRP) concentrations in dogs anesthetized for elective surgery using two anesthetic protocols.Study designProspective, randomized clinical study.AnimalsTwenty client-owned dogs presenting for elective ovariohysterectomy or castration.MethodsThe dogs were randomized into two groups. All dogs were premedicated with glycopyrrolate (0.011 mg kg?1) and hydromorphone (0.1 mg kg?1) IM approximately 30 minutes prior to induction of anesthesia. Anesthesia in dogs in group 1 was induced with propofol (6 mg kg?1) IV to effect and in dogs in group 2 with diazepam (0.2 mg kg?1) IV followed by etomidate (2 mg kg?1) IV to effect. For maintenance of anesthesia, group 1 received sevoflurane (adjustable vaporizer setting 0.5–4%) and group 2 received a combination of fentanyl (0.8 μg kg?1 minute?1) and midazolam (8.0 μg kg?1 minute?1) IV plus sevoflurane (adjustable vaporizer setting 0.5–4%) to maintain anesthesia. Serum cTnI and CRP concentrations were measured at baseline and 6, 18, and 24 hours post-anesthetic induction. Biochemical analysis was performed at baseline. Lactate was obtained at baseline and 6 hours post-anesthetic induction. Heart rate and mean arterial blood pressure were measured intra-operatively.ResultsBaseline serum cTnI and CRP concentrations were comparable between groups. A significant difference in serum cTnI or CRP concentrations was not detected post-operatively between groups at any time point. Serum CRP concentrations were significantly increased post-anesthetic induction in both groups, which was attributed to surgical trauma.Conclusions and clinical relevanceThere was no significant difference in serum cTnI and CRP concentrations between anesthetic protocols. Further investigation in a larger number of dogs is necessary to confirm the current findings. |
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| Keywords: | anesthesia biomarker canine |
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