Brazilian Journal of Anesthesiology
https://bjan-sba.org/article/doi/10.1016/j.bjane.2014.05.002
Brazilian Journal of Anesthesiology
Special Article

Minimum anesthetic volume in regional anesthesia by using ultrasound-guidance

Volume mínimo de anestésico em anestesia regional guiada por ultrassom

Alessandro Di Filippo; Silvia Falsini; Chiara Adembri

http://dx.doi.org/10.1016/j.bjane.2014.05.002 Braz J Anesthesiol, vol.66, n5, p.499-504, 2016
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Abstract

Abstract The ultrasound guidance in regional anesthesia ensures the visualization of needle placement and the spread of Local Anesthetics. Over the past few years there was a substantial interest in determining the Minimum Effective Anesthetic Volume necessary to accomplish surgical anesthesia. The precise and real-time visualization of Local Anesthetics spread under ultrasound guidance block may represent the best requisite for reducing Local Anesthetics dose and Local Anesthetics-related effects. We will report a series of studies that have demonstrated the efficacy of ultrasound guidance blocks to reduce Local Anesthetics and obtain surgical anesthesia as compared to block performed under blind or electrical nerve stimulation technique. Unfortunately, the results of studies are widely divergent and not seem to indicate a dose considered effective, for each block, in a definitive way; but it is true that, through the use of ultrasound guidance, it is possible to reduce the dose of anesthetic in the performance of anesthetic blocks.

Keywords

Anesthetics, local, conduction-blocking, Anesthetics, local, adverse effects, Anesthetics, local, dose, Ultrasound guidance

Resumo

Resumo O uso de ultrassom em anestesia regional permite visualizar a colocação da agulha e a propagação dos anestésicos locais. Nos últimos anos houve um grande interesse em determinar o volume mínimo eficaz de anestésico necessário para fazer a anestesia cirúrgica. A visualização precisa e em tempo real da difusão dos anestésicos locais com o uso de ultrassom pode ser o melhor requisito para reduzir a dose e os efeitos relacionados aos anestésicos locais. Revisamos uma série de estudos que relataram a eficácia de bloqueios guiados por ultrassom para reduzir o uso de anestésicos locais e obter anestesia cirúrgica, em comparação com bloqueios feitos com a técnica às cegas e de estimulação elétrica de nervos. Infelizmente, os resultados dos estudos são muito divergentes e não parecem indicar uma dose considerada eficaz para cada bloqueio de modo definitivo, mas é verdade que, com o auxílio do ultrassom, é possível reduzir a dose dos anestésicos em bloqueios.

Palavras-chave

Anestésicos, locais, bloqueio da condução, Anestésicos locais, efeitos adversos, Anestésicos locais, dose, Guiado por ultrassom

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