Brazilian Journal of Anesthesiology
https://bjan-sba.org/article/doi/10.1590/S0034-70942002000300004
Brazilian Journal of Anesthesiology
Scientific Article

Farmacodinâmica do cisatracúrio no transplante renal

Cisatracurium pharmacodynamics in renal transplantation

Ismar Lima Cavalcanti; Maria Angela Tardelli; Rita de Cássia Rodrigues

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Resumo

JUSTIFICATIVA E OBJETIVOS: A escolha do cisatracúrio, especialmente nos doentes com insuficiência orgânica, parece ser benéfica, devido a sua eliminação órgão independente de Hofmann e menor tendência a liberar histamina. Este trabalho tem como objetivo determinar, em doentes portadores de insuficiência renal crônica, a farmacodinâmica do cisatracúrio durante o transplante renal. MÉTODO: Foram estudados 30 pacientes divididos em dois grupos, 15 com função renal normal submetidos a cirurgia bucomaxilo-facial e 15 portadores de insuficiência renal crônica submetidos a transplante renal sob anestesia geral com etomidato, sufentanil e sevoflurano em concentrações entre 0,5 e 1% de fração expirada. Receberam dose venosa de 0,15 mg.kg-1 de cisatracúrio na indução e 0,05 mg.kg-1 todas as vezes que T1 recuperava 25%. A função neuromuscular foi monitorizada de forma contínua por aceleromiografia utilizando o padrão de estimulação seqüência de quatro estímulos, através da estimulação supramáxima do nervo ulnar. RESULTADOS: Os resultados referentes à farmacodinâmica do cisatracúrio mostram que o início de ação (4,1 e 4,9 min), a duração clínica (68,9 e 75,4 min) e o índice de recuperação (20,2 e 28 min) foram semelhantes entre os grupos normal e insuficiência renal, respectivamente. Os tempos para a relação T4/T1 atingir 0,7 (34,3 e 51,4 min) e 0,9 (49,7 e 68,6 min) a partir do último 25% de T1 apresentaram diferença estatisticamente significante entre os grupos, com os maiores valores no grupo insuficiência renal. A razão de acumulação foi igual a 1,08. CONCLUSÕES: O início de ação, a duração clínica e o índice de recuperação são semelhantes entre os dois grupos, o tempo para a relação T4/T1 atingir 0,7 ou 0,9 foi maior no grupo insuficiência renal do que no grupo normal e o cisatracúrio não apresentou efeito acumulativo no grupo insuficiência renal.

Palavras-chave

BLOQUEADORES NEUROMUSCULARES, CIRURGIA

Abstract

BACKGROUND AND OBJECTIVES: Cisatracurium seems to be beneficial, especially for patients with organ dysfunction, due to organ-independent Hofmann elimination and a lower trend to histamine release. This study aimed at determining cisatracurium pharmacodynamic profile in renal transplantation. METHODS: Participated in this study 30 patients who were distributed in two groups: 15 healthy patients submitted to maxillofacial surgery, and 15 patients with chronic renal failure submitted to renal transplantation. All patients were anesthetized with etomidate, sufentanil and 0.5% to 1% sevoflurane . Intravenous cisatracurium was administrated after anesthetic induction and additional 0.05 mg.kg-1 was injected whenever T1 recovered 25%. Neuromuscular function was continuously monitored by acceleromyography using TOF stimulation, through supramaximal ulnar nerve stimulation. RESULTS: Onset time (4.1 and 4.9 min), clinical duration (68.9 and 75.4 min) and recovery time (20.2 and 28 min) were similar between normal and renal failure groups, respectively. Time spent until T4/T1 > 0.7 (34.3 and 51.4 min), and > 0.9 (49.7 and 68.6 min) since the last 25% recovery of T1 were statistically different between groups, with the higher values observed in the renal failure group. Accumulation ratio was 1.08. CONCLUSIONS: Onset, clinical duration and recovery time were comparable between groups. Time to T4/T1 > 0.7 and > 0.9 was longer in the renal failure group as compared to the normal group and cisatracurium did not show cumulative effects in the renal failure group.

Keywords

NEUROMUSCULAR BLOCK, NEUROMUSCULAR BLOCK

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