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 transcript:

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. Slideshow Project DOI: /JRRD JSP 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

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. Slideshow Project DOI: /JRRD JSP 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.

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. Slideshow Project DOI: /JRRD JSP 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.

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. Slideshow Project DOI: /JRRD JSP 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.

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. Slideshow Project DOI: /JRRD JSP 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.

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. Slideshow Project DOI: /JRRD JSP 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.