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Exploratory Study on Lower Limb Amputee Patients : Use of IMUs to Monitor the Gait Quality During the Rehabilitation Period
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH).
2019 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Förberedande studie på patienter med amputerad nedre extremitet : Användning av IMU:er för att övervaka gångkvaliteten under rehabiliteringsperioden (Swedish)
Abstract [en]

Specific rehabilitation is a key period for a lower-limb amputee patient. While learning how to walk with a prosthesis, the patient needs to avoid any gait compensations that may lead to future comorbidities. To reach a gait pattern close to the one of a healthy person, objective data may be of great help to complement the experience of the clinician team. By using 6 IMUs located on the feet, shanks and thighs accompanied by 3 accelerometers on the pelvis, sternum and head, data could be recorded during walking exercises of 7 rehabilitation sessions of a patient. To compute the absolute symmetry index of the stance phase duration and the stride duration all over the instrumented sessions, the gait events defining the transitions between gait phases were determined thanks to several algorithms. By first comparing the error obtained in the calculation of the stance phase duration with all tested algorithms as compared to the data from pressure insoles considered as a reference system, the algorithm developed by Trojaniello and collaborators [1] was found to be the most adapted to this situation. Using this algorithm on the data from all sessions highlighted the possibility to detect changes in the symmetry of stance phase duration and stride duration, that are relative to the gait quality. This means that IMUs seem to be able to monitor the progress of a patient during his rehabilitation. Hence, IMUs have proven themselves to be a system of great interest in the analysis of the gait pattern of a lower-limb amputee patient in rehabilitation, by allowing for an embedded measurement of much more parameters than the pressure insoles, whose calibration constituted a real limitation. 

Place, publisher, year, edition, pages
2019. , p. 38
Series
TRITA-CBH-GRU ; 2019:003
Keywords [en]
Gait analysis; Lower Limb Amputee; IMU; Gait quality; Rehabilitation
National Category
Medical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-246140OAI: oai:DiVA.org:kth-246140DiVA, id: diva2:1296096
External cooperation
CERAH (France)
Subject / course
Medical Engineering
Educational program
Master of Science in Engineering - Medical Engineering
Supervisors
Examiners
Available from: 2019-03-15 Created: 2019-03-13 Last updated: 2019-03-15Bibliographically approved

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