@article{Kwasnicki:2015:10.1016/j.ijsu.2015.04.032,
author = {Kwasnicki, RM and Ali, R and Jordan, SJ and Atallah, L and Leong, JJH and Jones, GG and Cobb, J and Yang, GZ and Darzi, A},
doi = {10.1016/j.ijsu.2015.04.032},
journal = {International Journal of Surgery},
pages = {14--20},
title = {A wearable mobility assessment device for total knee replacement: A longitudinal feasibility study},
url = {http://dx.doi.org/10.1016/j.ijsu.2015.04.032},
volume = {18},
year = {2015}
}

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TY  - JOUR
AB  - BackgroundTotal 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.MethodsFourteen 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.ResultsSensor-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.DiscussionThis 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.
AU  - Kwasnicki,RM
AU  - Ali,R
AU  - Jordan,SJ
AU  - Atallah,L
AU  - Leong,JJH
AU  - Jones,GG
AU  - Cobb,J
AU  - Yang,GZ
AU  - Darzi,A
DO  - 10.1016/j.ijsu.2015.04.032
EP  - 20
PY  - 2015///
SN  - 1743-9191
SP  - 14
TI  - A wearable mobility assessment device for total knee replacement: A longitudinal feasibility study
T2  - International Journal of Surgery
UR  - http://dx.doi.org/10.1016/j.ijsu.2015.04.032
UR  - http://hdl.handle.net/10044/1/56739
VL  - 18
ER  - 

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