Cardiorespiratory, sedatives and antinociceptives effects of the detomidine in combination with lidocaine on caudal epidural anesthesia in horses

• Grant number: 12/23476-8
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: September 01, 2013
• End date: August 31, 2014
• Field of knowledge: Agronomical Sciences - Veterinary Medicine - Animal Clinics and Surgery
• Principal Investigator: Ewaldo de Mattos Junior
• Grantee: Eduardo Henrique de Castro Rezende
• Host Institution: Pró-Reitoria Adjunta de Pesquisa e Pós-Graduação. Universidade de Franca (UNIFRAN). Franca , SP, Brazil

Abstract

With the objective to verify the cardiorespiratory, sedative, and antinociceptive effects of dexmedetomidine combined with lidocaine in horses will be used six animals, male or female, and clinically healthy. They will be randomly assigned to three groups of six animals in a blinded crossover study, with a minimum interval of 7 days between treatments. The groups are designated as D (dexmedetomidine 3.5 microg/kg), DL (dexmedetomidine 3.5 microg/kg + 0.2 mg/kg lidocaine) and L (0.2 mg/kg lidocaine). The drugs will be applied with the aid of an epidural catheter inserted into the coccygeal space. Will be assessed values of heart rate and respiratory rate, systolic, mean and diastolic blood pressure, rectal temperature, hydrogen potential in arterial blood (PHA), partial pressure of oxygen in arterial blood (PaO2), partial pressure of carbon dioxide in arterial blood (PaCO2), arterial oxygen saturation (SaO2), bicarbonate (HCO3-), base deficit (DEB), sedation and antinociceptive aspects. The data are evaluated in the moments M0 to M480, M0 corresponding to basal, 15, 30, 60, 120, 240, and 480 minutes after drug administration, a total of eight hours of evaluation. The results will be tested using the Shapiro-Wilk normality test; when data present normal distribution will be employed analysis of variance (ANOVA) with repeated measures and Bonferroni's test complementary analysis and variables with normal distribution will be compared with the Wilcoxon test. The significance level is 5%.(AU)