DocumentCode :
2506852
Title :
Knee-extension-assist for knee-ankle-foot orthoses
Author :
Spring, Alexander ; Kofman, Jonathan ; Lemaire, Edward
Author_Institution :
Univ. of Waterloo, Waterloo, ON, Canada
fYear :
2011
fDate :
Aug. 30 2011-Sept. 3 2011
Firstpage :
8259
Lastpage :
8262
Abstract :
Individuals with quadriceps muscle weakness often have difficulty generating the knee-extension moments required for common mobility tasks. A new device that provides a knee-extension moment was designed to help individuals perform sit-to-stand and stand-to-sit. The knee-extension-assist (KEA) was designed as a modular component to be incorporated into existing knee-ankle-foot-orthoses (KAFO). The KEA loads a set of springs as the knee flexes under bodyweight and returns the stored energy as an extension moment during knee extension. The springs can be locked in place at the end of flexion to prevent unwanted knee extension while seated. When the affected leg is unloaded, the device disengages, allowing free joint motion. A prototype KEA underwent mechanical testing and biomechanical evaluation on an able-bodied individual during sit-to-stand and stand-to-sit.
Keywords :
biomechanics; mechanical testing; muscle; orthotics; springs (mechanical); biomechanical evaluation; free joint motion; knee extension assistance; knee extension moment; knee-ankle-foot orthosis; mechanical testing; mobility task; quadriceps muscle weakness; sit-to-stand motion; spring; stand-to-sit motion; Biomechanics; Force; Joints; Knee; Legged locomotion; Springs; Testing; Ankle; Biomechanics; Foot; Humans; Knee; Orthotic Devices; Self-Help Devices;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Engineering in Medicine and Biology Society, EMBC, 2011 Annual International Conference of the IEEE
Conference_Location :
Boston, MA
ISSN :
1557-170X
Print_ISBN :
978-1-4244-4121-1
Electronic_ISBN :
1557-170X
Type :
conf
DOI :
10.1109/IEMBS.2011.6092036
Filename :
6092036
Link To Document :
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