Use of bupivacaine alone and associated to fentanyl and sufentanil in epidural anaesthesia in female dogs / Uso da bupivacaína isolada e associada ao fentanil e sufentanil em anestesia epidural em cadelas

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

Potent opioids such as fentanyl and sufentanil, althought largely used in dogs, are rarely employed at the epidural space on this species. The aim of the present study was to compare the cardiovascular and systemics effects, as well as the analgesic action on the post operative period of epidural anaesthesia performed with bupivacaine alone or associated with fentanyl and sufentanil, in bitches sedated with continuous infusion of propofol. Thirty female dogs, submitted to ovariosalpingohisterectomy, allocated in three groups of ten animals each were used. All the animals received acepromazine (0,1 mg/kg), and continuous infusion of propofol for sedation. The animals of group I received fentanyl (2µg/kg) and bupivacaine (1 mg/kg), animals of group II received sufentanil (1µg/kg) and bupivacaine (1 mg/kg) and those of group III received bupivacaine (1mg/kg). The agentes were administered at the lumbosacral space, and diluted in saline soluction to a total volume of 0,36 ml/kg. Cardiac and respiratory rate, arterial blood pressure were evaluated, as well as pH and blood gases. Analgesia and sedation levels, and plasmatic cathecolamines were measured for the evaluation of systemic parameters. The evaluation of blook extension was performed by the panniculus test. Pinprick performed at the interdigital space and at perineum region were utilized to evaluate onset time of sensitive and motor blockage. All parameters were evaluated during a total time of 6 hours. No significant changes related to the cardiovascular, respiratory and sedation parameters were observed during the study. The degree of analgesia observed at the post operative period were higher in the sufentanil group. However both fentanyl and bupivacaine groups also obtained a sufficient level of analgesia. Based on the results obtained, the authors concluded that the surgical procedure could be performed by means of the three anesthetic techniques employed producing sufficient analgesia and an acceptable neuroendocrine modulation of pain with minimal adverse effects.

ASSUNTO(S)

epidural anesthesia fentanil cães bupivacaine sufentanil fentanyl dogs anestesia epidural sufentanil bupivacaína

ACESSO AO ARTIGO

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