Assessing Shoulder Biomechanics of Healthy Elderly Individuals During Activities of Daily Living Using Inertial Measurement Units: High Maximum Elevation Is Achievable but Rarely Used

被引:21
作者
Chapman, Ryan M. [1 ]
Torchia, Michael T. [2 ]
Bell, John-Erik [2 ]
Van Citters, Douglas W. [1 ]
机构
[1] Dartmouth Coll, Thayer Sch Engn, 14 Engn Dr, Hanover, NH 03755 USA
[2] Dartmouth Hitchcock Med Ctr, Dept Orthopaed, Lebanon, NH 03766 USA
来源
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME | 2019年 / 141卷 / 04期
关键词
arthroplasty; shoulder; inertial measurement unit; rehabilitation; range of motion; AMBULATORY MEASUREMENT; MOTION; RANGE; ELBOW; ARTHROPLASTY; RELIABILITY; SYSTEMS; REHABILITATION; OSTEOARTHRITIS; ACCURACY;
D O I
10.1115/1.4042433
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
Current shoulder clinical range of motion (ROM) assessments (e.g., goniometric ROM) may not adequately represent shoulder function beyond controlled clinical settings. Relative inertial measurement unit (IMU) motion quantifies ROM precisely and can be used outside of clinic settings capturing "real-world" shoulder function. A novel IMU-based shoulder elevation quantification method was developed via IMUs affixed to the sternum/humerus, respectively. This system was then compared to in-laboratory motion capture (MOCAP) during prescribed motions (flexion, abduction, scaption, and internal/external rotation). MOCAP/IMU elevation were equivalent during flexion (R-2 = 0.96, mu(Error) = 1.7 deg), abduction (R-2 = 0.96, mu(Error) = 2.9 deg), scaption (R-2 = 0.98, mu(Error) = -0.3 deg), and internal/external rotation (R-2 = 0.90, mu(Error) = 0.4 deg). When combined across movements, MOCAP/IMU elevation were equal (R-2 = 0.98, mu(Error) = 1.4 deg). Following validation, the IMU-based system was deployed prospectively capturing continuous shoulder elevation in 10 healthy individuals (4 M, 69 +/- 20 years) without shoulder pathology for seven consecutive days (13.5 +/- 2.9 h/day). Elevation was calculated continuously daily and outcome metrics included percent spent in discrete ROM (e.g., 0-5 deg and 5-10 deg), repeated maximum elevation (i.e., >10 occurrences), and maximum/average elevation. Average elevation was 40 +/- 6 deg. Maximum with >10 occurrences and maximum were on average 145-150 deg and 16 +/- 68 deg, respectively. Subjects spent the vast majority of the day (97%) below 90 deg of elevation, with the most time spent in the 25-30 deg range (9.7%). This study demonstrates that individuals have the ability to achieve large ROMs but do not frequently do so. These results are consistent with the previously established lab-based measures. Moreover, they further inform how healthy individuals utilize their shoulders and may provide clinicians a reference for postsurgical ROM.
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页数:7
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