Efeito da utilização de 2 mg.kg-1 de lidocaína endovenosa na latência de duas doses diferentes de rocurônio e na resposta hemodinâmica à intubação traqueal

Gustavo Gameiro Vivancos; Jyrson Guilherme Klamt; Luís Vicente Garcia

doi:10.1590/S0034-70942011000100001

Scientific Article

Efeito da utilização de 2 mg.kg-1 de lidocaína endovenosa na latência de duas doses diferentes de rocurônio e na resposta hemodinâmica à intubação traqueal

Effects of 2 mg.kg-1 of intravenous lidocaine on the latency of two different doses of rocuronium and on the hemodynamic response of orotracheal intubation

Gustavo Gameiro Vivancos; Jyrson Guilherme Klamt; Luís Vicente Garcia

http://dx.doi.org/10.1590/S0034-70942011000100001 Braz J Anesthesiol, vol.61, n1, p.6-12, 2011

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Resumo

JUSTIFICATIVA E OBJETIVOS: A lidocaína potencializa o efeito dos bloqueadores neuromusculares e atenua a resposta hemodinâmica à intubação. O objetivo do presente estudo foi testar o efeito da lidocaína sobre a latência de duas doses diferentes do rocurônio e sobre a resposta hemodinâmica à intubação orotraqueal (IOT). MÉTODO: 80 pacientes foram distribuídos em quatro grupos: os dos Grupos 1 e 2 receberam 0,6 mg.kg-1 de rocurônio, sendo que os do Grupo 2 receberam também 2 mg.kg-1 de lidocaína antes da indução; os dos Grupos 3 e 4 receberam 1,2 mg.kg-1 de rocurônio, sendo que os do Grupo 4 receberam 2 mg.kg-1 de lidocaína. A latência do bloqueio neuromuscular foi medida por meio da aceleromiografia. A avaliação hemodinâmica foi feita no momento basal, imediatamente antes e um minuto depois da IOT. RESULTADOS: Não se encontrou diferença estatística significativa entre a latência do rocurônio nas doses de 0,6 mg.kg-1 e 1,2 mg.kg-1 nos pacientes que receberam ou não a lidocaína antes da indução. A latência dos pacientes que receberam rocurônio 0,6 mg.kg-1 com lidocaína foi estatisticamente igual à dos pacientes que receberam 1,2 mg.kg-1de rocurônio, independentemente da administração ou não de lidocaína. Os pacientes que não receberam lidocaína antes da indução apresentaram aumento dos valores de pressão arterial sistólica, diastólica e média e da frequência cardíaca após a IOT, o que não ocorreu nos que receberam lidocaína. CONCLUSÕES: Assim, a lidocaína por via venosa antes da indução anestésica foi capaz de atenuar a resposta hemodinâmica associada às manobras de IOT, mas não de diminuir a latência do bloqueio neuromuscular produzido por duas doses diferentes de rocurônio.

Palavras-chave

ANESTESICO, Local, INTUBAÇÃO TRAQUEAL, FISIOLOGIA, Transmissão neuromusculares, TÉCNICAS DE MEDIÇÃO

Abstract

BACKGROUND AND OBJECTIVES: Lidocaine potentiates the effects of neuromuscular blockers and attenuates the hemodynamic response to orotracheal intubation. The objective of the present study was to test the effects of lidocaine on the latency of two different doses of rocuronium and on the hemodynamic response to intubation. METHODS: Eighty patients were distributed in 4 groups: Groups 1 and 2 received 0.6 mg.kg-1 of rocuronium; patients in Group 2 also received 2 mg.kg-1 of lidocaine before intubation. Patients in Groups 3 and 4 received 1.2 mg.kg-1 of rocuronium; patients in Group 4 received additional 2 mg.kg-1 of lidocaine. The latency of the neuromuscular blockade was measured by acceleromyography. Hemodynamic evaluation was performed at baseline, immediately before, and 1 minute after orotracheal intubation (OI). RESULTS: Statistically significant differences were not observed between the latency from 0.6 mg.kg-1 and 1.2 mg.kg-1 of rocuronium in patients who received lidocaine before induction and those who did not. The latency in patients who received 0.6 mg.kg-1 of rocuronium with lidocaine was statistically similar to that of those who received 1.2 mg.kg-1 rocuronium independently of whether lidocaine was administered or not. Patients who did not receive lidocaine before induction showed the same increases in systolic, diastolic, and mean arterial pressure and heart rate after OI, which was not observed in those patients who received lidocaine. CONCLUSIONS: Intravenous lidocaine before anesthetic induction was capable of attenuating the hemodynamic response associated to OI maneuvers, but it did not reduce the latency of the neuromuscular blockade produced by two different doses of rocuronium.

Keywords

Lidocaine, Neuromuscular Blockade, Neuromuscular Nondepolarizing Agents, Intubation, Intratracheal

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Efeito da utilização de 2 mg.kg-1 de lidocaína endovenosa na latência de duas doses diferentes de rocurônio e na resposta hemodinâmica à intubação traqueal

Effects of 2 mg.kg-1 of intravenous lidocaine on the latency of two different doses of rocuronium and on the hemodynamic response of orotracheal intubation

Gustavo Gameiro Vivancos; Jyrson Guilherme Klamt; Luís Vicente Garcia

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