A wearable mobility assessment device for total knee replacement: A longitudinal feasibility study

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Title: A wearable mobility assessment device for total knee replacement: A longitudinal feasibility study
Authors: Kwasnicki, RM
Ali, R
Jordan, SJ
Atallah, L
Leong, JJH
Jones, GG
Cobb, J
Yang, GZ
Darzi, A
Item Type: Journal Article
Abstract: Background Total knee replacement currently lacks robust indications and objective follow-up metrics. Patients and healthcare staff are under-equipped to optimise outcomes. This study aims to investigate the feasibility of using an ear-worn motion sensor (e-AR, Imperial College London) to conduct objective, home-based mobility assessments in the peri-operative setting. Methods Fourteen patients on the waiting list for knee replacement, and 15 healthy subjects, were recruited. Pre-operatively, and at 1, 3, 6, 12 and 24 weeks post-operatively, patients underwent functional mobility testing (Timed Up and Go), knee examination (including range of motion), and an activity protocol whilst wearing the e-AR sensor. Features extracted from sensor motion data were used to assess patient performance and predict patients' recovery phase. Results Sensor-derived peri-operative mobility trends correlated with clinical measures in several activities, allowing functional recovery of individual subjects to be profiled and compared, including the detection of a complication. Sensor data features enabled classification of subjects into normal, pre-operative and 24-week post-operative groups with 89% (median) accuracy. Classification accuracy was reduced to 69% when including all time intervals. Discussion This study demonstrates a novel, objective method of assessing peri-operative mobility, which could be used to supplement surgical decision-making and facilitate community-based follow-up.
Issue Date: 10-Apr-2015
Date of Acceptance: 1-Apr-2015
URI: http://hdl.handle.net/10044/1/56739
DOI: https://dx.doi.org/10.1016/j.ijsu.2015.04.032
ISSN: 1743-9191
Publisher: Elsevier
Start Page: 14
End Page: 20
Journal / Book Title: International Journal of Surgery
Volume: 18
Copyright Statement: © 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Department of Health
National Institute for Health Research
Funder's Grant Number: EP/E044298/1
EP/H009744/1
II-3A-0409-10036
NF-SI-0510-10186
Keywords: Science & Technology
Life Sciences & Biomedicine
Surgery
Total knee replacement
Mobility
Post-operative
Sensor
EAR-WORN SENSOR
RHEUMATOID-ARTHRITIS
OUTCOME MEASURE
IMPROVEMENT
OSTEOARTHRITIS
VALIDATION
GO
Aged
Aged, 80 and over
Arthroplasty, Replacement, Knee
Biomechanical Phenomena
Case-Control Studies
Exercise Therapy
Feasibility Studies
Female
Humans
Longitudinal Studies
Male
Middle Aged
Osteoarthritis, Knee
Postoperative Period
Prospective Studies
Range of Motion, Articular
Recovery of Function
1103 Clinical Sciences
Publication Status: Published
Appears in Collections:Faculty of Engineering
Division of Surgery
Computing
Faculty of Medicine



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