Eletroacupuntura para tratamento de hipotensão induzida por isofluorano em cavalos

Abstract

RESUMOObjetivou-se avaliar a eficiência do tratamento da hipotensão arterial com eletroacupuntura comparativamente à dobutamina em equinos. Foram avaliados seis cavalos adultos, saudáveis, mantidos em anestesia inalatória, com isofluorano, em ventilação mecânica. Após a estabilização da anestesia, foi induzida hipotensão arterial, através do incremento da concentração do isofluorano, iniciando-se um dos tratamentos: DOB: dobutamina (1,5µg kg -1 min -1 , infusão contínua intravenosa); EA: estímulo elétrico no acuponto pericárdio 6 (PC6), bilateralmente; SHAM: estímulo elétrico em ponto falso de acupuntura. Foram mensurados: frequência cardíaca (FC), pressão arterial média (PAM), temperatura retal (T), concentração final expirada de isofluorano (ET iso ), variáveis hemogasométricas, concentração sérica de aspartato aminotransferase (AST) e creatina fosfoquinase (CK), tempo e qualidade da recuperação pós-anestésica. Houve incremento na PAM de 50%, 36,6% e 7,5% nos tratamentos DOB, EA e SHAM, respectivamente. Não houve diferença entre os grupos nas variáveis hemogasométricas, FC, T, ET iso , CK, AST, tempo e qualidade de recuperação pós-anestésica. Conclui-se que o tratamento com dobutamina foi mais efetivo para o tratamento da hipotensão em cavalos sob anestesia inalatória quando comparado ao estímulo elétrico do acuponto PC6 ou ponto falso de acupuntura.Palavras-chave: equino, eletroacupuntura, dobutamina, hipotensão ABSTRACT This study aimed to evaluate the efficacy of electroacupuncture compared to the dobutamine treatment of hypotension in equines. Six adult horses were maintained in isoflurane anesthesia with mechanical ventilation. After anesthesia was established, the isoflurane concentration was raised until hypotension was achieved. After that the animals were treated with a constant rate of 1.5mg kg -1 min -1 intravenous dobutamine (DOB), electroacupunture to pericardium 6 (PC-6) acupoint (EA) and false point treatment (SHAM). Heart rate (HH), median arterial blood pressure (MAP), rectal temperature (T), isoflurane endtidal concentration, arterial blood gases, creatine kinase (CK), aspartate transaminase (AST), recovery time and quality of recovery were investigated. The MAP increased 50%, 36.5% and 7.5%% in DOB, EA and SHAM treatments, respectively. HH, T, arterial

Recovery after General Anaesthesia in Adult Horses: A Structured Summary of the Literature

“…(3) Medial condylar fractures of the third metatarsal bone in horses [358] (4) Use of tension band wires in horses with fractures of the ulna: 22 cases (1980-1992) [359] ( (34) Influence of azaperone/metomidate in anesthesia on blood biochemistry in horse [389] (35) Ultrasonography of the equine triceps muscle before and after general anaesthesia and in post anaesthetic myopathy [390] (36) Metabolism during anaesthesia and recovery in colic and healthy horses: A microdialysis study [391] (37) Metabolic changes associated with anaesthesia and cherry poisoning in a pony [392] (38) The relationship of muscle perfusion and metabolism with cardiovascular variables before and after detomidine injection during propofol-ketamine anaesthesia in horses [393] Miscellaneous (39) A prospective clinical trial comparing metrizamide and iohexol for equine myelography [394] (40) Corneal abrasion and microbial contamination in horses following general anaesthesia for non-ocular surgery [395] (41) Electroacupuncture treatment for isoflurane induced hypotension in horses [396] Total other factors publications = 41…”

“…Our search also included three other publications classified as "miscellaneous" [394][395][396]. A good care of the eye needs to be taken in the anaesthetised horse, as corneal abrasion/ulceration may occur [395].…”

“…For horses anaesthetised for myelography, the contrast iohexol is a better option than metrizamide, as the latter produces seizures and intensification of preexisting neurological signs and prolongs recoveries [394]. Electroacupuncture appears to not influence recoveries [396]; its use as part of a multimodal analgesic plan in a horse with facial nerve paralysis following general anaesthesia has been described [418].…”