Postoperative analgesic evaluation of intraovarian lidocaine infiltration in female dogs submitted ovariohysterectomy

Abstract The ovariohysterectomy (OHV) is a surgery that causes mild to moderate pain, requiring the use of a protocol that promotes good analgesia during and after the procedure. The lidocaine is a local anesthetic, considered efficient and low-cost. Based on this, this study aimed to evaluate the postoperative period of female dogs that received intraovarian lidocaine during an ovariohysterectomy. Twelve female dogs, aged 1 to 5 years, with body weights between 10 and 35kg, were divided into two groups: animals that received intraovarian lidocaine infiltration (GL - lidocaine group), and animals that did not receive the medication (CG - control group). The animals were evaluated prior to the administration of pre-anesthetic drugs (T0), immediately after the completion of the surgical procedure, as well as after 3 (T3), 6 (T6), 12 (T12), 24 (T24) and 48 (T48) hours, using the University of Melbourne Pain Scale (UMPS). For continuous data, the Tukey test was performed; for qualitative variables, the Kruskal-Wallis test was used. Both groups at no time during the analysis exceeded the minimum UMPS score considered, indicating that none of the animals presented a relevant state of pain. It is concluded that intraovarian infiltration of lidocaine in female dogs undergoing ovariohysterectomy did not provide additional analgesia according to the analysis criteria used, revealing the need for additional studies associating different anesthetic protocols and pain assessment methods.