Sistema GaitGrabber na captação de dados cinemáticos durante a marcha

Abstract

IntroduçãoNos últimos anos, a tecnologia otimizou o estudo da análise do movimento. Esse avanço tecnológico atingiu principalmente o estudo da marcha, gerando dados computadorizados mais precisos e fidedignos (ASTEPHEN et al., 2008; RESENDE et al., 2010). Os dados cinemáticos descrevem o movimento e incluem variáveis como deslocamento, velocidade e aceleração angular e são obtidos por equipamentos como a cinematografia e sistemas automatizados mais avançados como o Qualisys, Optotrak e Vicon (RICHARDS, 1999;CAPPOZO et al., 2005). Entretanto, o custo desses sistemas torna praticamente inviável a sua compra, obrigando pesquisadores e clínicos a fazerem uso da análise observacional.A literatura tem demonstrado que a qualidade das avaliações observacionais depende muito da habilidade do clínico (HILLMAN et al., 2010). Somado a isso, vários estudos vêm Motriz, Rio Claro, v.18 n.3, p.505-514, jul./set. 2012 Artigo Original Sistema GaitGrabber na captação de dados cinemáticos durante a marcha GaitGrabber system on kinematic gait analysesAbstract: The purpose of this study was to develop and test the validity and reliability of the GaitGrabber System in measuring kinematic variables in the sagittal plane during gait. Eighteen individuals participated in the reliability study and 28 in the concurrent validity study. The Qualisys Pro-Reflex System used as a gold standard reference system. The GaitGrabber calculates the relative angles at the hip, knee and ankle in the sagittal plane. The Intraclass Correlation Coefficient (ICC) was used to compare the average of the angular peaks between visits. The principal component analysis was used to test the validity of the system. The ICC ranged from moderate to excellent and the validity of the system was proved for the ankle. There were significant differences in the range of motion for the hip and knee joints which were attributed to different instrumental characteristics. The GaitGrabber system is valid and reliable and can be clinically used to analyze kinematics during gait in the sagittal plane.

Validity and Reliability of Free Software for Bidimentional Gait Analysis

“…This assessment is essential for functional diagnosis and monitoring individuals with orthopedic, rheumatological, and neurological problems 6 and also serve as a basis for making prostheses and building robotic exoskeletons 7,8,9 . Despite its importance, the evaluation of locomotion in clinical practice is still commonly performed by the rater observation, which has a very subjective character as it is experience dependent and prone to error, thus leading to low or moderate reliability 10,11,12 . In past decades, computational systems were created to quantitatively evaluate the human gait by measuring kinetic and kinematic parameters 13,14,15 in different populations both for clinical application and to improve performance 5,2,16. The three-dimensional analysis is an important tool for measuring human movement because it evaluates movement in all three movement planes and is a very reliable source of measurement; thus, it is considered the gold standard in many research studies 17,18,19,20 . However, the high cost and lack of human resources able to operate them and interpret their results makes it difficult to implement this technology in hospitals and outpatient clinical practices 21,6,15 .…”