Gait event detection using inertial measurement units in people with transfemoral amputation: a comparative study.
In recent years, inertial measurement units (IMUs) have been proposed as an alternative to force platforms and pressure sensors for gait events (i.e., initial and final contacts) detection. While multiple algorithms have been developed, the impact of gait event timing errors on temporal parameters a...
| Published in: | Medical & Biological Engineering & Computing Vol. 58; no. 3; pp. 461 - 471 |
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| Main Authors: | , , , , , |
| Format: | pictorial research tables/charts Journal Article |
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Springer Nature
Mar2020
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=142105115&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 142105115 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 01400118 PO0 jtl: Medical & Biological Engineering & Computing issn: 01400118 maglogo: N pubinfo: dt: Mar2020 vid: 58 iid: 3 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 142105115 142105115 NLM31873834 142105115 10.1007/s11517-019-02098-4 NLM31873834 142105115 ppf: 461 ppct: 10 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Gait event detection using inertial measurement units in people with transfemoral amputation: a comparative study. aug: au: Simonetti, Emeline Villa, Coralie Bascou, Joseph Vannozzi, Giuseppe Bergamini, Elena Pillet, Hélène affil: Institution nationale des Invalides (INI)/CERAH, 47 rue de l'Echat, 94000, Créteil, France sug: subj: Amputation Femur Surgery Gait Physiology Algorithms Human Female Middle Age Time Factors Male Validation Studies Comparative Studies Evaluation Research Multicenter Studies Middle Aged: 45-64 years Female Male ab: In recent years, inertial measurement units (IMUs) have been proposed as an alternative to force platforms and pressure sensors for gait events (i.e., initial and final contacts) detection. While multiple algorithms have been developed, the impact of gait event timing errors on temporal parameters and asymmetry has never been investigated in people with transfemoral amputation walking freely on level ground. In this study, five algorithms were comparatively assessed on gait data of seven people with transfemoral amputation, equipped with three IMUs mounted at the pelvis and both shanks, using pressure insoles for reference. Algorithms' performance was first quantified in terms of gait event detection rate (sensitivity, positive predictive value). Only two algorithms, based on shank mounted IMUs, achieved an acceptable detection rate (positive predictive value > 99%). For these two, accuracy of gait events timings, temporal parameters, and absolute symmetry index of stance-phase duration (SPD-ASI) were assessed. Whereas both algorithms achieved high accuracy for stride duration estimates (median errors: 0%, interquartile ranges < 1.75%), lower accuracy was found for other temporal parameters due to relatively high errors in the detection of final contact events. Furthermore, SPD-ASI derived from IMU-based algorithms proved to be significantly different to that obtained from insoles data. Graphical abstract Gait event detection with IMU in people with transfemoral amputation: initial contact (IC) and final contact (FC) events at the sound (s) and prosthetic (p) side are identified. Five algorithms were implemented using either shank-mounted or pelvis-mounted IMUs. Gait events were used to estimate temporal parameters (stride duration, stance phase duration [SPD], and double support time) and SPD asymmetry. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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