Avaliação da administração de bupivacaína à altura da primeira vértebra lombar, sobre parâmetros cardiorrespiratórios, bloqueios sensitivo e anestésico, em cadelas submetidas à ovariohisterectomia

• Main Author: Silva, Paloma do Espírito Santo [UNESP]
• Publication Date: 2015
• Format: Master thesis
• Language: por
• Source: Repositório Institucional da UNESP
• Download full: http://hdl.handle.net/11449/128151; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/17-09-2015/000849618.pdf
• topic: Cão - Cirurgia; Anestesia animal; Bupivacaina; Cateteres; Anestesicos; Anesthesia

The epidural anesthesia is a widespread technique, presenting easy execution, safety and postoperative comfort for the patient. However, administration of drugs cranial to the seventh lumbar vertebrae using an epidural catheter is little studied. This study used 16 bitches that were separated randomly into 2 groups, which differed by epidural bupivacaine dose, 1 mgkg-1 (G1) or 2 mgkg-1 (G2). They were premedicated with butorphanol and and after the induction with etomidate, the epidural catheter was positioned at the first lumbar vertebra. After 30 minutes, bupivacaine was administered and sensory block was evaluated for 30 minutes. The anesthetic block was evaluated during an ovariohisterectomy elective surgery. The cardiovascular, ventilometric and blood gas parameters were also evaluated. The results of parametric variables were analyzed by SAS 9.4 software (2010). There were few differences between the groups in relation to physiological parameters but they remained near the normal range for the specie. The analysis of sensory block showed that G2 had better blocking for all variables. Similarly, the G2 showed better anesthetic block during the surgery. It concludes that the two bupivacaine doses administered up to the first lumbar vertebra, do not interfere significantly in the cardiovascular, ventilometric and blood gas parameters. Furthermore, the dose of 2mgkg-1 results in a better anesthetic and sensitive block than the dose of 1mgkg-1 in these experimental conditions. The dose of 2mgkg-1 was effective to ovariohysterectomy in bitches