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The development and clinical application of acoustical technique in hip joint / 华中科技大学学报(医学)(英德文版)
Journal of Huazhong University of Science and Technology (Medical Sciences) ; (6): 362-6, 2002.
Artigo em Inglês | WPRIM | ID: wpr-634114
ABSTRACT
A non-invasive acoustical system was developed for the measurement of transmission properties of acoustic waves in the hip joints. The instrumentation consisted of three sub-systems. An excitation system employed a vibratory force at the sacrum of the test subjects. A transduction system included a pair of identical microphones installed in the tubes of two stethoscopes, which were placed at the greater trochanters on both sides for picking up the acoustical signals transmitted across the hip joints. The data acquisition and analysis system was a portable signal analyzer with a program of dual channel digital filter for measuring the power of acoustical signal in 1/3-octave frequency bands. 27 normal adults, 20 normal pre-school children and 40 normal neonates were randomly selected for testing. Coherence function (CF) and discrepancy (D) was measured during the testing. Results from the three groups showed that there was a high coherence of the signals (CF > 0.9) and a small discrepancy (D 0.93) and a smaller discrepancy (D < 2 dB) was observed. This study showed that the development of the acoustical technique provided a practical method with objective parameters. The results obtained in this study can offer a baseline for further investigation of hip disorders particularly those related to structural abnormalities of the hip.
Assuntos
Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Sacro / Som / Estimulação Acústica / Processamento de Sinais Assistido por Computador / Fatores Etários / Articulação do Quadril Idioma: Inglês Revista: Journal of Huazhong University of Science and Technology (Medical Sciences) Ano de publicação: 2002 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Sacro / Som / Estimulação Acústica / Processamento de Sinais Assistido por Computador / Fatores Etários / Articulação do Quadril Idioma: Inglês Revista: Journal of Huazhong University of Science and Technology (Medical Sciences) Ano de publicação: 2002 Tipo de documento: Artigo