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This article and any supplementary material should be cited as follows: Meier MR, Hansen AH, Gard SA, McFadyen AK. Obstacle course: Users’ maneuverability.

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Presentation on theme: "This article and any supplementary material should be cited as follows: Meier MR, Hansen AH, Gard SA, McFadyen AK. Obstacle course: Users’ maneuverability."— Presentation transcript:

1 This article and any supplementary material should be cited as follows: Meier MR, Hansen AH, Gard SA, McFadyen AK. Obstacle course: Users’ maneuverability and movement efficiency when using Otto Bock C-leg, Otto Bock 3R60, and CaTech SNS prosthetic knee joints. J Rehabil Res Dev. 2012;49(4):583–96. http://dx.doi.org/10.1682/JRRD.2010.05.0094 Slideshow Project DOI:10.1682/JRRD.2010.05.0094JSP Obstacle course: Users’ maneuverability and movement efficiency when using Otto Bock C-Leg, Otto Bock 3R60, and CaTech SNS prosthetic knee joints Margrit R. Meier, PhD; Andrew H. Hansen, PhD; Steven A. Gard, PhD; Angus K. McFadyen, PhD

2 This article and any supplementary material should be cited as follows: Meier MR, Hansen AH, Gard SA, McFadyen AK. Obstacle course: Users’ maneuverability and movement efficiency when using Otto Bock C-leg, Otto Bock 3R60, and CaTech SNS prosthetic knee joints. J Rehabil Res Dev. 2012;49(4):583–96. http://dx.doi.org/10.1682/JRRD.2010.05.0094 Slideshow Project DOI:10.1682/JRRD.2010.05.0094JSP Aim – Evaluate maneuverability and movement efficiency of transfemoral prosthesis users traversing obstacle course with defined surface characteristics while wearing 3 different prosthetic knee joints: C-Leg, CaTech SNS, and 3R60. Relevance – Studying maneuverability on nonlevel surfaces: Is important to many daily activities. Can add to understanding of possible interactions between walking surfaces and performance characteristics of different prosthetic components.

3 This article and any supplementary material should be cited as follows: Meier MR, Hansen AH, Gard SA, McFadyen AK. Obstacle course: Users’ maneuverability and movement efficiency when using Otto Bock C-leg, Otto Bock 3R60, and CaTech SNS prosthetic knee joints. J Rehabil Res Dev. 2012;49(4):583–96. http://dx.doi.org/10.1682/JRRD.2010.05.0094 Slideshow Project DOI:10.1682/JRRD.2010.05.0094JSP Methods 12 users completed multisectional obstacle course with each joint (C-Leg, SNS, and 3R60). – Performed twice: once without and once with mental loading task (MLT). – 1-month familiarization period with each knee joint before data collection. Performance was objectively assessed. – Time measurement: digital video recordings. – Movement efficiency: Total Heart Beat Index.

4 This article and any supplementary material should be cited as follows: Meier MR, Hansen AH, Gard SA, McFadyen AK. Obstacle course: Users’ maneuverability and movement efficiency when using Otto Bock C-leg, Otto Bock 3R60, and CaTech SNS prosthetic knee joints. J Rehabil Res Dev. 2012;49(4):583–96. http://dx.doi.org/10.1682/JRRD.2010.05.0094 Slideshow Project DOI:10.1682/JRRD.2010.05.0094JSP Obstacle Course Overview of obstacle course (OC) setup within laboratory. Foam section (1 m wide, 3 m long, 15 cm high), slalom section around three chairs, vacuumized beanbags to mimic sand (1 m wide, 3 m long), rock section (1 m wide, 3 m long), ramp (1.4 m wide, 1.5 m long, 5° downward slope), corner (90°left turn) and step (12 cm high). Two video cameras were set up such that entire OC could be filmed, allowing time measurements for each section.

5 This article and any supplementary material should be cited as follows: Meier MR, Hansen AH, Gard SA, McFadyen AK. Obstacle course: Users’ maneuverability and movement efficiency when using Otto Bock C-leg, Otto Bock 3R60, and CaTech SNS prosthetic knee joints. J Rehabil Res Dev. 2012;49(4):583–96. http://dx.doi.org/10.1682/JRRD.2010.05.0094 Slideshow Project DOI:10.1682/JRRD.2010.05.0094JSP Results Ti me to complete course: – Longer with 3R60. – No significant difference: C-leg and SNS. – Significant difference only: 3R60 and SNS (slalom, rock sections). 3R60 and C-Leg (rock section). Falls in simulated sand: – 2 users with C-Leg. – 1 users with 3R60. – 0 users with SNS. Movement efficiency: – Without MLT: Similar for all joints. – With MLT: Significant decrease with C-Leg. Previous SNS experience didn’t influence results.

6 This article and any supplementary material should be cited as follows: Meier MR, Hansen AH, Gard SA, McFadyen AK. Obstacle course: Users’ maneuverability and movement efficiency when using Otto Bock C-leg, Otto Bock 3R60, and CaTech SNS prosthetic knee joints. J Rehabil Res Dev. 2012;49(4):583–96. http://dx.doi.org/10.1682/JRRD.2010.05.0094 Slideshow Project DOI:10.1682/JRRD.2010.05.0094JSP Conclusions Surface compliance adversely affects user’s ability to control some prosthetic knee joints. C-Leg’s reduced movement efficiency with mental loading task has clinical relevance. – Many daily tasks are performed in parallel. – Such task might fatigue person more while wearing C-Leg than 3R60 or SNS knee. Additional studies are required to: – Understand users’ psychological influence on perception and performance while walking on different terrains. – Identify specific improvements to knee joint designs. – Develop more effective gait training protocols.

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