Pilot Testing of Assessment of Capacity for Myoelectric Control (ACMC) in Evaluating Myoelectric Hand Function in Chinese Population

Lai, Frank, Yan, Elaine Wai hung, Ma, B.T., Zhao, Z.G. and Liu, T. (2019) Pilot Testing of Assessment of Capacity for Myoelectric Control (ACMC) in Evaluating Myoelectric Hand Function in Chinese Population. Annals of Physiotherapy & Occupational Therapy, 2 (1). 000114. ISSN 2640-2734

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Abstract

Upper limb amputations cause marked functional disability and lower the individual’s self-body image, with severepsychological implications. Many rehabilitation parameters are involved in the successful rehabilitation of upper limbamputations. The aim of this study was to examine the validity and reliability of the Chinese version of Assessment ofCapacity for Myoelectric Control (Chinese-ACMC) in upper limb amputated subjects and with a myo-electric-poweredprosthetic hand.To validate the Chinese version of Assessment of Capacity for Myoelectric Control (Chinese-ACMC) in upper limbamputee subjects (children and adults) with a myo-electric-powered prosthetic hand. A sample of convenience samplingof 22 subjects (11 males, 11 females) with upper limb amputation and myoelectric prosthetic hands were recordedduring a regular clinical visit for ACMC. Each subject was evaluated according to four criteria: (a) Upper Limb Amputationincluding all levels of amputation; (b) No specific pain type – no matter phantom or pain in the stump; (c) With intactcognitive function; (d) Age ranged from 12 to 40 years. With instruction, occupational therapists and prosthetic-orthoticswith at least twenty years’ clinical experience of myoelectric prosthesis training would conduct the 30-items ChineseACMC for each subject. A serial of errand tasks of activities of daily living were designed for evaluation. Individuals’ratings were repeated after 4 weeks. Through test-retest reliability, internal consistency testing, factor analysis, intra andinter factor correlation analysis. A four-factor structure, namely, “Gripping”, “Holding”, “Releasing” and “Coordinating”are identified.

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