confiabilidade da medida de espessuras musculares pela ultrassonografia reliability of muscle thickness measurements using ultrasound

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ID: 150962
2010
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Abstract
OBJETIVO: Determinar a confiabilidade das medidas de espessuras dos músculos flexores e extensores do cotovelo e joelho pela ultrassonografia (US), quantificando o erro típico associado a essas medidas (ETM). MÉTODOS: A confiabilidade (duas medidas interdias) foi determinada em 15 voluntários aparentemente saudáveis (oito mulheres, 33,9 ± 11,4 anos, 76 ± 21kg, 170 ± 10cm). As imagens da musculatura flexora (FC) e extensora do cotovelo (EC) e flexora (FJ) e extensora do joelho (EJ) foram obtidas pela US bidimensional no modo B, utilizando transdutor de 7,5MHz. As espessuras do tecido muscular compreendidas entre as interfaces com o osso e com o tecido adiposo foram medidas em sítios anatômicos identificados e registrados para ser repetidos na segunda medida. RESULTADOS: A ANOVA não identificou diferenças significativas entre as medidas repetidas. Os coeficientes de correlação intraclasse foram FC = 0,970, EC = 0,971, FJ = 0,555 e EJ = 0,929 (P < 0,05 para todos). Os coeficientes de variação foram de 3,9%, 6,1%, 6,6 % e 4,6%, e os ETM 1,3mm, 1,6mm, 4,9mm e 1,9mm, respectivamente, para espessuras de FC, EC, FJ e EJ. A análise dos gráficos de Bland-Altman apontou que as variáveis não apresentaram erro heterocedástico. CONCLUSÃO: As medidas de espessuras musculares de FC, EC e EJ apresentaram alta confiabilidade, possibilitando seu uso para intervenções como programas de dieta, treinamento físico ou reabilitação. No entanto, o uso da medida de FJ não deve ser recomendada, pois mostrou baixa confiabilidade e alto ETM.
PURPOSE: To determine the reliability of muscle thickness measurements of elbow and knee flexors and extensors using ultrasound, and to quantify the typical error associated to the measurements (TEM). METHODS: The test-retest reliability was determined in 15 apparently healthy volunteers (8 women, 34 ± 11 years, 76 ± 21 kg, 170 ± 10 cm). The images of elbow flexors (EF) and extensors (EE) and knee flexors (KF) and extensors (KE) were obtained using a two dimensional mode B ultrasound instrument with a 7.5 MHz transducer. Muscle thickness between the adipose tissue and bone interfaces were measured at anatomical landmarks previously identified and recorded to assure the exact site for the retest. RESULTS: ANOVA did not identify any significant differences between the repeated measurements. Intraclass correlation coefficients (ICC) of each pair of measure were EF = 0.970, EE = 0.971, KF = 0.555 e KE = 0.929 (P < 0.05 for all). The coefficients of variation were 3.9 %, 6.1 %, 6.6 % e 4.6 %, and TEM 1.3 mm, 1.6 mm, 4.9 mm e 1.9 mm, respectively, for the EF, EE, KF and KE thickness. Analysis of the Bland-Altman plot charts indicated that the variables did not present heterocedastic errors. CONCLUSION: EF, EE and KE muscle thickness measurements using the current method were highly reliable and can be used to measure and monitor changes in diet, physical training and rehabilitation programs. Nevertheless, KF measure should not be recommended since it presented low reliability and high TEM.
Reference Key
gomes2010revistaconfiabilidade Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Paulo Sergio Chagas Gomes;Cláudia de Mello Meirelles;Sandra Pereira Leite;Carlos Antonio Barbosa Montenegro
Journal research disclosure
Year 2010
DOI
10.1590/S1517-86922010000100008
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-86922010000100008
Keywords
hypertrophy reproducibility skeletal musclesports medicine

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