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Sensors 2019, 19(8), 1781; https://doi.org/10.3390/s19081781

Assessment of Shoulder Range of Motion Using a Wireless Inertial Motion Capture Device—A Validation Study

1
Department of Orthopaedics, University Hospital Geelong, Barwon Health, Geelong, Victoria 3220, Australia
2
Barwon Centre for Orthopaedic Research and Education (B-CORE), St John of God Hospital Geelong, Victoria 3220, Australia
3
Deakin University, Waurn Ponds & Burwood, Victoria 3216 & 3125, Australia
*
Author to whom correspondence should be addressed.
Received: 5 March 2019 / Revised: 30 March 2019 / Accepted: 11 April 2019 / Published: 13 April 2019
(This article belongs to the Section Intelligent Sensors)
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Abstract

(1) Background: Measuring joint range of motion has traditionally occurred with a universal goniometer or expensive laboratory based kinematic analysis systems. Technological advances in wearable inertial measurement units (IMU) enables limb motion to be measured with a small portable electronic device. This paper aims to validate an IMU, the ‘Biokin’, for measuring shoulder range of motion in healthy adults; (2) Methods: Thirty participants completed four shoulder movements (forward flexion, abduction, and internal and external rotation) on each shoulder. Each movement was assessed with a goniometer and the IMU by two testers independently. The extent of agreement between each tester’s goniometer and IMU measurements was assessed with intra-class correlation coefficients (ICC) and Bland-Altman 95% limits of agreement (LOA). Secondary analysis compared agreement between tester’s goniometer or IMU measurements (inter-rater reliability) using ICC’s and LOA; (3) Results: Goniometer and IMU measurements for all movements showed high levels of agreement when taken by the same tester; ICCs > 0.90 and LOAs < ±5 degrees. Inter-rater reliability was lower; ICCs ranged between 0.71 to 0.89 and LOAs were outside a prior defined acceptable LOAs (i.e., > ±5 degrees); (4) Conclusions: The current study provides preliminary evidence of the concurrent validity of the Biokin IMU for assessing shoulder movements, but only when a single tester took measurements. Further testing of the Biokin’s psychometric properties is required before it can be confidently used in routine clinical practice and research settings. View Full-Text
Keywords: joint range of motion; inertial measurement unit; IMU; wearable; goniometer; ROM; wireless; shoulder joint range of motion; inertial measurement unit; IMU; wearable; goniometer; ROM; wireless; shoulder
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Rigoni, M.; Gill, S.; Babazadeh, S.; Elsewaisy, O.; Gillies, H.; Nguyen, N.; Pathirana, P.N.; Page, R. Assessment of Shoulder Range of Motion Using a Wireless Inertial Motion Capture Device—A Validation Study. Sensors 2019, 19, 1781.

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