Anestesia epidural com diferentes doses de lidocaína em caprinos.

Abstract

The epidural lumbosacral is known for its simplicity, safety and effectiveness. It has the purpose of blocking the nervous impulses from the spinal nerves inside of the spinal channel, or, whereof stimulation of specific receivers, of producing regional analgesia. This present work has as objective assess benchmark the outcomes of two doses of lidocaine , administered by epidural lumbosacral in goats, as the effects breath hearting and about the area of anaesthesia obtained. It was developed on the dependencies of the Hospital Veterinario do Centro de Saude e Tecnologia Rural da Universidade Federal de Campina Grande, Campus de Patos - PB Veterinary Hospital of the Center of Healt and Rural Tecnology from University Federal of Campina Grande Campus of Patos - PB). It has been used six caprine, male, manly higidos, one of them is four years old and weighing 18,2±1,7 kg. Each animal was checked its weigh, after 15 minutes of resting, was contained for mensuration from the parameters physiological what have been analyzed. After that, the animals have been medicated with acepromazina, on dose of 0,05 mg/kg by intraveinous (IV). Each of the animals was submitted to two protocols, with an interval of 15 days among each anaesthesia; group 1 and group 2: administration of lidocaine at 2% with vasoconstrictor, on the doses of 0,3 mL/kg e 0,4 mL/ respectively, by lumbosacral epidural. It has been appraised the heartbeat frequency, electrocardiogram frequency respiratory motility ruminant and temperature body. All of the parameters was mensured immediately before the administration of acepromazina T -15) and of the epidural anaesthesia (TO) & at 15 (T15), 30 (T30), 45 (T45), 60 (T60), 90 (T90) and 120 (T120) minutes after. The cutaneous anesthesia (latency, duration and extension from area unsensitized) was appraised through of cutaneous punch with hypodermic needle 30x7, starting the search on region perineal and following skully. It was assigned according the rate of ataxia in a scale of: 0 - to ataxia absent; 1 - to ataxia moderate and get deambular; 2 - to ataxia serious with new decubite. In none of the parameters relative of the anesthetic induction occur difference significative among the groups. The maximum height from anaesthesia achieved was up to the sixth rib (C6) laterally and until the half of the breastbone in the abdomen into the group 1, until the second rib (C2) laterally and portion of the skull of the breastbone of the abdomen into the group 2, whom have been obtained 15 minutes before and lasted on the average 60 minutes. There was a variation on heartbeat frequency, into the Interval P-R, on motility ruminant and on body temperature. The recumbent occur at 3,3±3,1 minutes and lasted 107,5±34,1 minutes into the group 1. Into the group 2 the recumbent started at 1,4±2,3 minutes and lasted 126,5±34,2 minutes. The rate of ataxia presented for all of the animals it assumed the standpoint quadrupedal was degree 1 (ataxia moderate). Concluding, in spite of the few alteration obtained, the utilization of lidocaine in doses of 0,3 mL/Kg and mainly of 0,4mL/Kg , by epidural, is efficient to expand the height (migration of the skull) reached by analgesia and to extend a little bit more the time of action of this analgesia