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New device for intrinsic hand muscle strength measurement: an alternative to strain gauge handheld dynamometer

Madhanagopal, J. and Singh, O. P. and Mohan, V. and Sathasivam, K. V. and Omar, A. H. and Abdul Kadir, M. R. (2017) New device for intrinsic hand muscle strength measurement: an alternative to strain gauge handheld dynamometer. Evaluation and the Health Professions . ISSN 0163-2787 (In Press)

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An accurate measurement of intrinsic hand muscle strength (IHMS) is required by clinicians for effective clinical decision-making, diagnosis of certain diseases, and evaluation of the outcome of treatment. In practice, the clinicians use Intrins-o-meter and Rotterdam Intrinsic Hand Myometer for IHMS measurement. These are quite bulky, expensive, and possess poor interobserver reliability (37–52%) and sensitivity. The purpose of this study was to develop an alternative lightweight, accurate, cost-effective force measurement device with a simple electronic circuit and test its suitability for IHMS measurement. The device was constructed with ketjenblack/deproteinized natural rubber sensor, 1-MΩ potential divider, and Arduino Uno through the custom-written software. Then, the device was calibrated and tested for accuracy and repeatability within the force range of finger muscles (100 N). The 95% limit of agreement in accuracy from −1.95 N to 2.06 N for 10 to 100 N applied load and repeatability coefficient of ±1.91 N or 6.2% was achieved. Furthermore, the expenditure for the device construction was around US$ 53. For a practical demonstration, the device was tested among 16 participants for isometric strength measurement of the ulnar abductor and dorsal interossei. The results revealed that the performance of the device was suitable for IHMS measurement.

Item Type:Article
Uncontrolled Keywords:cost effective, device, force sensor, intrinsic muscles, muscle strength evaluation
Subjects:Q Science > QH Natural history > QH301 Biology
Divisions:Biosciences and Medical Engineering
ID Code:77225
Deposited By: Fazli Masari
Deposited On:31 May 2018 09:53
Last Modified:31 May 2018 09:53

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