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Computer-assisted hand-held dynamometer: low-cost instrument for muscle function assessment in rehabilitation medicine

  • Biomedical Engineering
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Abstract

In rehabilitation medicine, muscle function is assessed during the physical examination of the patient. Although a simple hand-held instrument improves the assessment of static strength, it is rarely used in clinical practice, where dynamic measurements are preferred. A computer-assisted hand-held dynamometer (CAHNDY) has been developed that enables the clinician to measure dynamic muscle function in a standardised manner, using simple (i.e. portable and low-cost) apparatus. The CAHNDY comprises a force transducer and a movement transducer interfaced to a personal computer. In the study dynamic measurement protocols are used, based on a biomechanical analysis of daily activities. In this way, iso-functional profiles can be established, describing the kinematics of muscle function in its functional context. Using the iso-functional profiles as a basis for standardisation, the double feedback algorithm of the CAHNDY assists the tester in meeting this standard, during maximal muscle function testing. In a multi-centre trial, the CAHNDY is evaluated by physical therapists for knee extensor and flexor function. The CAHNDY enables iso-functional dynamic muscle function testing, although application is limited by the maximal strength of the tester. It is concluded that the CAHNDY is suitable for use in rehabilitation medicine.

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Authors and Affiliations

  1. Department of Rehabilitation Medicine, Free University Hospital, De Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands

    J. Harlaar, M. E. Roebroeck & G. J. Lankhorst

  2. Netherlands, Institute of Primary Health Care (NIVEL), Utrecht, The Netherlands

    M. E. Roebroeck

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  1. J. Harlaar
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  2. M. E. Roebroeck
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  3. G. J. Lankhorst
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Correspondence to J. Harlaar.

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Harlaar, J., Roebroeck, M.E. & Lankhorst, G.J. Computer-assisted hand-held dynamometer: low-cost instrument for muscle function assessment in rehabilitation medicine. Med. Biol. Eng. Comput. 34, 329–335 (1996). https://doi.org/10.1007/BF02519999

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  • DOI: https://doi.org/10.1007/BF02519999

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