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CC BY-NC-ND 4.0 · Arq Neuropsiquiatr 2017; 75(12): 869-874
DOI: 10.1590/0004-282X20170153
Article

Phrenic nerve conduction studies: normative data and technical aspects

Aspectos técnicos e normatização da neurocondução do nervo frênico
Analucia Abreu Maranhão
1   Universidade Federal do Estado do Rio de Janeiro, Faculdade de Medicina, Departamento de Pneumologia, Rio de Janeiro RJ, Brasil
,
Sonia Regina da Silva Carvalho
1   Universidade Federal do Estado do Rio de Janeiro, Faculdade de Medicina, Departamento de Pneumologia, Rio de Janeiro RJ, Brasil
,
Marcelo Ribeiro Caetano
2   Universidade Federal do Estado do Rio de Janeiro, Faculdade de Medicina, Departamento de Neurocirurgia, Rio de Janeiro RJ, Brasil
,
Alexandre Hofke Alamy
3   Private Practice, Rio de Janeiro, Rio de Janeiro, Brazil;
,
Eduardo Mesquita Peixoto
4   Universidade Federal do Estado do Rio de Janeiro, Faculdade de Enfermagem, Rio de Janeiro RJ, Brasil
,
Pedro Del Esporte Peçanha Filgueiras
5   Universidade Federal do Estado de Rio de Janeiro, Faculdade de Medicina, Rio de Janeiro RJ, Brasil
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ABSTRACT

Objective: The aim of the present study was to define normative data of phrenic nerve conduction parameters of a healthy population.

Methods: Phrenic nerve conduction studies were performed in 27 healthy volunteers.

Results: The normative limits for expiratory phrenic nerve compound muscle action potential were: amplitude (0.47 mv - 0.83 mv), latency (5.74 ms - 7.10 ms), area (6.20 ms/mv - 7.20 ms/mv) and duration (18.30 ms - 20.96 ms). Inspiratory normative limits were: amplitude (0.67 mv - 1.11 mv), latency (5.90 ms - 6.34 ms), area (5.62 ms/mv - 6.72 ms/mv) and duration (13.77 ms - 15.37 ms).

Conclusion: The best point of phrenic nerve stimulus in the neck varies among individuals between the medial and lateral border of the clavicular head of the sternocleidomastoid muscle and stimulation of both sites, then choosing the best phrenic nerve response, seems to be the appropriate procedure.

RESUMO

Objetivo: O objetivo do presente estudo foi definir os dados normativos de condução do nervo frênico de uma população saudável.

Métodos: Foram realizados estudos de condução do nervo frênico em 27 voluntários saudáveis.

Resultados: Os limites normais do potencial de ação muscular composto do nervo frênico durante a expiração foram: amplitude (0.47 mv - 0.83 mv), latência (5.74 ms - 7.10 ms), área (6.20 ms/mv - 7.20 ms/mv) e duração (18.30 ms - 20.96 ms). E durante a inspiração os limites normais foram: amplitude (0.67 mv - 1.11 mv), latência (5.90 ms - 6.34 ms), área (5.62 ms/mv - 6.72 ms/mv) e duração (13.77 ms - 15.37 ms).

Conclusão: O melhor ponto de estímulo do nervo frênico no pescoço varia entre a borda medial e lateral da cabeça clavicular do músculo esternocleidomastóideo. Estimular ambos os locais e escolher a melhor resposta do nervo frênico parece ser o procedimento mais adequado.

Keywords:

electrodiagnosis - reference values - phrenic nerve - spirometry - neural conduction

Palavras-chave:

eletrodiagnóstico - valores de referência - nervo frênico - espirometria - condução nervosa


Publication History

Received: 05 June 2017

Accepted: 21 August 2017

Article published online:
01 September 2023

© 2023. Academia Brasileira de Neurologia. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commecial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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