PMID- 22079386
OWN - NLM
STAT- MEDLINE
DCOM- 20120416
LR  - 20131121
IS  - 1873-2380 (Electronic)
IS  - 0021-9290 (Linking)
VI  - 45
IP  - 2
DP  - 2012 Jan 10
TI  - The knee adduction moment measured with an instrumented force shoe in patients 
      with knee osteoarthritis.
PG  - 281-8
LID - 10.1016/j.jbiomech.2011.10.027 [doi]
AB  - The external knee adduction moment (KAdM) during gait is an important parameter 
      in patients with knee osteoarthritis (OA). KAdM measurement is currently 
      restricted to instruments only available in gait laboratories. However, 
      ambulatory movement analysis technology, including instrumented force shoes (IFS) 
      and inertial and magnetic measurement systems (IMMS), can measure kinetics and 
      kinematics of human gait free of laboratory restrictions. The objective of this 
      study was a quantitative validation of the accuracy of the KAdM in patients with 
      knee OA, when estimated with an ambulatory-based method (AmbBM) versus a 
      laboratory-based method (LabBM). AmbBM is employing the IFS and a linked-segment 
      model, while LabBM is based on a force plate and optoelectronic marker system. 
      Effects of ground reaction force (GRF), centre of pressure (CoP), and knee joint 
      position measurement are evaluated separately. Twenty patients with knee OA were 
      measured. The GRFs showed differences up to 0.22 N/kg, the CoPs showed 
      differences up to 4 mm, and the medio-lateral and vertical knee position showed 
      differences to 9 mm, between AmbBM and LabBM. The GRF caused an under-estimation 
      in KAdM in early stance. However, this effect was counteracted by differences in 
      CoP and joint position, resulting in a net 5% over-estimation. In midstance and 
      late stance the accuracy of the KAdM was mainly limited by use of the 
      linked-segment model for joint position estimation, resulting in an 
      under-estimation (midstance 6% and late stance 22%). Further improvements are 
      needed in the estimation of joint position from segment orientation.
CI  - Copyright (c) 2011 Elsevier Ltd. All rights reserved.
FAU - van den Noort, Josien C
AU  - van den Noort JC
AD  - Department of Rehabilitation Medicine, Research Institute MOVE, VU University 
      Medical Center, Amsterdam, The Netherlands. j.vandennoort@vumc.nl
FAU - van der Esch, Martin
AU  - van der Esch M
FAU - Steultjens, Martijn P M
AU  - Steultjens MP
FAU - Dekker, Joost
AU  - Dekker J
FAU - Schepers, H Martin
AU  - Schepers HM
FAU - Veltink, Peter H
AU  - Veltink PH
FAU - Harlaar, Jaap
AU  - Harlaar J
LA  - eng
PT  - Clinical Trial
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20111112
PL  - United States
TA  - J Biomech
JT  - Journal of biomechanics
JID - 0157375
SB  - IM
MH  - Aged
MH  - Biomechanical Phenomena
MH  - Female
MH  - *Gait
MH  - Humans
MH  - Knee Joint/*physiopathology
MH  - Male
MH  - Middle Aged
MH  - *Models, Biological
MH  - Osteoarthritis, Knee/*physiopathology
MH  - *Shoes
EDAT- 2011/11/15 06:00
MHDA- 2012/04/17 06:00
CRDT- 2011/11/15 06:00
PHST- 2011/02/24 00:00 [received]
PHST- 2011/10/14 00:00 [revised]
PHST- 2011/10/22 00:00 [accepted]
PHST- 2011/11/15 06:00 [entrez]
PHST- 2011/11/15 06:00 [pubmed]
PHST- 2012/04/17 06:00 [medline]
AID - S0021-9290(11)00669-5 [pii]
AID - 10.1016/j.jbiomech.2011.10.027 [doi]
PST - ppublish
SO  - J Biomech. 2012 Jan 10;45(2):281-8. doi: 10.1016/j.jbiomech.2011.10.027. Epub 
      2011 Nov 12.