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CC BY-NC-ND 4.0 · Arq Neuropsiquiatr 2019; 77(01): 33-38
DOI: 10.1590/0004-282X20180144
Article

Critical illness polyneuromyopathy in septic patients: Is it possible to diagnose it in a bedside clinical examination?

Polineuromiopatia do doente crítico em pacientes sépticos: É possível diagnosticar em um exame clínico à beira do leito?
Débora Schmidt 
1   Hospital de Clínicas de Porto Alegre, Porto Alegre RS, Brasil
2   Hospital Nossa Senhora da Conceição, Porto Alegre RS, Brasil
,
Ana Cláudia Coelho
1   Hospital de Clínicas de Porto Alegre, Porto Alegre RS, Brasil
2   Hospital Nossa Senhora da Conceição, Porto Alegre RS, Brasil
,
Fernando Nataniel Vieira
1   Hospital de Clínicas de Porto Alegre, Porto Alegre RS, Brasil
2   Hospital Nossa Senhora da Conceição, Porto Alegre RS, Brasil
,
Vitor Félix Torres
2   Hospital Nossa Senhora da Conceição, Porto Alegre RS, Brasil
,
Augusto Savi
1   Hospital de Clínicas de Porto Alegre, Porto Alegre RS, Brasil
,
Silvia Regina Rios Vieira
1   Hospital de Clínicas de Porto Alegre, Porto Alegre RS, Brasil
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ABSTRACT

Objective: To determine the sensitivity and specificity of peripheral and respiratory muscle strength tests in diagnosing critical illness polyneuromyopathy (CIPNM), compared with an electrophysiological examination.

Methods: Fifty septic patients who required mechanical ventilation for at least five days, and without a previous history of muscle weakness, were included. Peripheral muscle strength was assessed using the Medical Research Council (MRC) score, handgrip strength by dynamometry, and respiratory muscle strength with maximum respiratory pressures. Diagnosis of CIPNM was either confirmed or rejected by an electrophysiological examination. Receiver operating characteristic curve analysis was performed to determine the cut-off values with the best sensitivity (SN) and specificity (SP) of the studied variables in the presence or absence of CIPNM.

Results: Patients with CIPNM were older, more critical (APACHE IV/SAPS 3), had a longer hospitalization, required mechanical ventilation for longer, and had a higher rate of intensive care unit readmission. Cutoff values identified CIPNM patients using MRC scores, dynamometry according to sex, maximal expiratory and inspiratory pressures, as well as being confirmed by the electrophysiological examination, with good sensitivity and specificity: < 40 (SN: 0.893; SP: 0.955); < 7 kg (SN: 1; SP: 0.909) for men, < 4 kg (SN: 0.882; SP: 1) for women; < 34 cmH2O (SN: 0.808; SP: 0.909) and > −40 cmH2O (SN: 0.846; SP: 0.909), respectively.

Conclusion: The MRC score, dynamometry or maximum respiratory pressures can be used to identify patients with CIPNM at the intensive care bedside assessment. The healthcare professional can choose any of the methods studied to evaluate the patient, based on his experience and the resource available.

RESUMO

Objetivo: Determinar a sensibilidade (SN) e especificidade (SP) dos testes de força muscular periférica e respiratória no diagnóstico da Polineuromiopatia do Doente Crítico (PNDC) em comparação com o estudo eletrofisiológico.

Métodos: Foram incluídos 50 pacientes sépticos, em ventilação mecânica (VM) durante pelo menos cinco dias e sem história prévia de fraqueza muscular. A força muscular foi avaliada utilizando o escore Medical Research Council (MRC), a força de preensão palmar e as pressões respiratórias máximas. O diagnóstico de PNDC foi confirmado ou excluído pelo estudo eletrofisiológico. A análise da curva ROC foi realizada para determinar os valores de corte com a melhor SN e SP.

Resultados: Os pacientes com PNDC eram mais velhos, mais graves, tiveram hospitalização mais longa, necessitaram de VM por mais tempo e apresentaram maior taxa de readmissão na Unidade de Terapia Intensiva. Os valores de corte identificaram os pacientes com PNDC usando o MRC, a dinamometria de acordo com o sexo, as pressões expiratórias e inspiratórias máximas, também confirmado pelo estudo eletrofisiológico, com boa sensibilidade e especificidade: < 40 (SN: 0.893; SP: 0.955), < 7 kg (SN: 1; SP: 0,909) para homens, < 4 kg (SN: 0,882; SP: 1) para mulheres, <34 cmH2O (SN: 0,808; SP: 0,909) e > −40 cmH2O (SN: 0,846; SP: 0,909), respectivamente.

Conclusão: Tanto o MRC, a dinamometria quanto as pressões respiratórias máximas podem ser usadas para identificar pacientes com PNDC na avaliação à beira do leito, podendo o profissional de saúde escolher qualquer um dos métodos baseado em sua experiência e no recurso disponível.

Keywords:

Polyneuropathies - muscular diseases - sepsis - muscle strength

Palavras-chave:

Polineuropatias - doenças musculares - sepse - força muscular


Publication History

Received: 05 February 2018

Accepted: 04 October 2018

Article published online:
21 August 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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