Avaliação dos efeitos da adição de butorfanol na pré-medicação de um protocolo anestésico base em cavalos
Ficheiros
Data
2015-05-04
Autores
Título da revista
ISSN da revista
Título do Volume
Editora
Resumo
Nas últimas duas décadas observaram-se consideráveis progressos na compreensão de como o cavalo reage à anestesia. Como resultado, novas técnicas, novos medicamentos e novas formas de usar fármacos antigos foram empregues para permitir uma anestesia mais segura e mais controlável nesta espécie.
O presente estudo teve como objetivo testar a adição de butorfanol (0,04 mg/Kg) à pré-medicação de um protocolo anestésico base em equinos.
Foram estudados quarenta e dois cavalos distribuídos, segundo o protocolo anestésico, em dois grupos: um com butorfanol na pré-medicação e outro sem butorfanol.
Nos dois grupos foram mensurados a frequência cardíaca e frequência respiratória, tempo de repleção capilar, coloração das mucosas, reflexo corneal e reflexo oculopalpebral, presença de nistagmos e saturação de oxigénio. No grupo com butorfanol, foram ainda registadas a pressão arterial média e pressão alveolar de dióxido de carbono.
Foram igualmente avaliados os tempos de indução ao decúbito e o tempo de recuperação à estação em minutos e a qualidade destes episódios.
Observou-se que a adição de butorfanol diminui o tempo de sedação. A qualidade tanto da sedação como da indução não sofreu alterações, tendo sido ótima. A nível cardiorrespiratório, o butorfanol, causou hipoventilação e uma hipotensão mais marcada. Não permitiu diminuir as necessidades de isoflurano para manutenção anestésica. Na recuperação anestésica não causou alterações, quer no tempo quer na qualidade.
Conclui-se que ambos os protocolos testados são considerados seguros para anestesiar esta espécie.
In the last two decades there were considerable progresses in understanding how the horse reacts to anesthesia. As a result, new techniques, new drugs and new ways to use old drugs were used to allow a safer and more controllable anesthesia in this specie. The present study aimed to test the addition of butorphanol (0.04 mg / kg) to the pre-medication of a based anesthetic protocol on horses. We studied forty-two horses, following the anesthetic protocol, allocated into two groups: one with butorphanol in the pre-medication and the other without butorphanol. Both groups were measured for heart and respiratory rate, capillary repletion time, mucous membrane color, corneal reflex and oculo-palpebral reflex, presence of nystagmus and oxygen saturation. In the group with butorphanol, it was also checked the medium arterial pressure and alveolar pressure of carbon dioxide. It was measured the time of recumbency and recovery time to the station in minutes and the quality of these events. It was observed that the addition of butorphanol decreases the time of sedation. The quality of both sedation and induction has not changed and it was very good. At a cardiorespiratory level, the butorphanol caused hypoventilation and a more marked hypotension. It was not possible to reduce the need for maintenance of isoflurane anesthesia. In the recovery process it didn’t cause any changes, either in time or in quality. It was concluded that both tested protocols are considered safe for anesthetizing this specie.
In the last two decades there were considerable progresses in understanding how the horse reacts to anesthesia. As a result, new techniques, new drugs and new ways to use old drugs were used to allow a safer and more controllable anesthesia in this specie. The present study aimed to test the addition of butorphanol (0.04 mg / kg) to the pre-medication of a based anesthetic protocol on horses. We studied forty-two horses, following the anesthetic protocol, allocated into two groups: one with butorphanol in the pre-medication and the other without butorphanol. Both groups were measured for heart and respiratory rate, capillary repletion time, mucous membrane color, corneal reflex and oculo-palpebral reflex, presence of nystagmus and oxygen saturation. In the group with butorphanol, it was also checked the medium arterial pressure and alveolar pressure of carbon dioxide. It was measured the time of recumbency and recovery time to the station in minutes and the quality of these events. It was observed that the addition of butorphanol decreases the time of sedation. The quality of both sedation and induction has not changed and it was very good. At a cardiorespiratory level, the butorphanol caused hypoventilation and a more marked hypotension. It was not possible to reduce the need for maintenance of isoflurane anesthesia. In the recovery process it didn’t cause any changes, either in time or in quality. It was concluded that both tested protocols are considered safe for anesthetizing this specie.
Descrição
Dissertação de Mestrado Integrado em Medicina Veterinária, Ciências Veterinárias
Palavras-chave
Anestesiologia veterinária , Cavalos , Medicação pré-anestésica , Butorfanol