scholarly journals A Position Sensing Glove to Aid Ankle-Foot Orthosis Diagnosis and Treatment

Sensors ◽  
2021 ◽  
Vol 21 (19) ◽  
pp. 6631
Author(s):  
Eduard Cazacu ◽  
Coen van der Grinten ◽  
Jeroen Bax ◽  
Guus Baeten ◽  
Fred Holtkamp ◽  
...  
Keyword(s):  
3D Model ◽  
Motion Artifacts ◽  
Sensor Data ◽  
Position Sensor ◽  
Virtual Model ◽  
Ankle Foot Orthosis ◽  
Position Sensing ◽  
Foot Model ◽  
Feature Resolution ◽  
Foot Orthosis

A position sensing glove called SmartScan, which creates a 3D virtual model of a real object, is presented. The data from the glove is processed by a volume minimization algorithm to validate the position sensor data. This allows only data from the object’s surface to be retained. The data validation algorithm allows the user to progressively improve an image by repeatedly moving their hand over the object. In addition, the user can choose their own balance between feature resolution and invalid data rejection. The SmartScan glove is tested on a foot model and is shown to be robust against motion artifacts, having a mean accuracy of 2.9 mm (compared to a 3D model generated from optical imaging) without calibration.

scholarly journals A Position Sensing Glove to Aid Ankle-Foot Orthosis Diagnosis and Treatment

2021 ◽  
Author(s):  
Eduard Cazacu ◽  
Coen Grinten ◽  
Jeroen Bax ◽  
Guus Baeten ◽  
Fred Holtkamp ◽  
...  
Keyword(s):  
3D Model ◽  
Motion Artifacts ◽  
Sensor Data ◽  
Position Sensor ◽  
Virtual Model ◽  
Ankle Foot Orthosis ◽  
Position Sensing ◽  
Foot Model ◽  
Feature Resolution ◽  
Foot Orthosis

A position sensing glove, called SmartScan, that creates a 3D virtual model of a real object is presented. The data from the glove is processed by a volume minimization algorithm to validate the position sensor data. This allows only data from the object’s surface to be retained. The data validation algorithm allows the user to progressively improve an image by repeatedly moving their hand over the object. In addition, the user can choose their own balance between feature resolution and invalid data rejection. The SmartScan glove is tested on a foot model and is shown to be robust against motion artifacts, and has a mean accuracy of 2.9 mm (compared to a 3D model generated from optical imaging) without calibration.

scholarly journals Effectiveness of an ankle–foot orthosis on walking in patients with stroke: a systematic review and meta-analysis

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yoo Jin Choo ◽  
Min Cheol Chang
Keyword(s):  
Stride Length ◽  
Walking Speed ◽  
Sagittal Plane ◽  
Meta Analysis ◽  
Step Length ◽  
Stride Time ◽  
Plane Angle ◽  
Ankle Foot Orthosis ◽  
Biomechanical Parameters ◽  
Foot Orthosis

AbstractWe conducted a meta-analysis to investigate the effectiveness of ankle–foot orthosis (AFO) use in improving gait biomechanical parameters such as walking speed, mobility, and kinematics in patients with stroke with gait disturbance. We searched the MEDLINE (Medical Literature Analysis and Retrieval System Online), CINAHL (Cumulative Index to Nursing and Allied Health Literature), Cochrane, Embase, and Scopus databases and retrieved studies published until June 2021. Experimental and prospective studies were included that evaluated biomechanics or kinematic parameters with or without AFO in patients with stroke. We analyzed gait biomechanical parameters, including walking speed, mobility, balance, and kinematic variables, in studies involving patients with and without AFO use. The criteria of the Cochrane Handbook for Systematic Reviews of Interventions were used to evaluate the methodological quality of the studies, and the level of evidence was evaluated using the Research Pyramid model. Funnel plot analysis and Egger’s test were performed to confirm publication bias. A total of 19 studies including 434 participants that reported on the immediate or short-term effectiveness of AFO use were included in the analysis. Significant improvements in walking speed (standardized mean difference [SMD], 0.50; 95% CI 0.34–0.66; P < 0.00001; I2, 0%), cadence (SMD, 0.42; 95% CI 0.22–0.62; P < 0.0001; I2, 0%), step length (SMD, 0.41; 95% CI 0.18–0.63; P = 0.0003; I2, 2%), stride length (SMD, 0.43; 95% CI 0.15–0.71; P = 0.003; I2, 7%), Timed up-and-go test (SMD, − 0.30; 95% CI − 0.54 to − 0.07; P = 0.01; I2, 0%), functional ambulation category (FAC) score (SMD, 1.61; 95% CI 1.19–2.02; P < 0.00001; I2, 0%), ankle sagittal plane angle at initial contact (SMD, 0.66; 95% CI 0.34–0.98; P < 0.0001; I2, 0%), and knee sagittal plane angle at toe-off (SMD, 0.39; 95% CI 0.04–0.73; P = 0.03; I2, 46%) were observed when the patients wore AFOs. Stride time, body sway, and hip sagittal plane angle at toe-off were not significantly improved (p = 0.74, p = 0.07, p = 0.07, respectively). Among these results, the FAC score showed the most significant improvement, and stride time showed the lowest improvement. AFO improves walking speed, cadence, step length, and stride length, particularly in patients with stroke. AFO is considered beneficial in enhancing gait stability and ambulatory ability.

Effects of ankle foot orthosis in stiff knee gait in adults with hemiplegia

2012 ◽  
Vol 45 (15) ◽  
pp. 2658-2661 ◽  
Author(s):  
Marcelo Andrés Gatti ◽  
Orestes Freixes ◽  
Sergio Anibal Fernández ◽  
Maria Elisa Rivas ◽  
Marcos Crespo ◽  
...  
Keyword(s):  
Ankle Foot Orthosis ◽  
Stiff Knee ◽  
Foot Orthosis

scholarly journals CONSIDERATIONS FOR IMPLEMENTATION OF AN ANKLE FOOT ORTHOSIS TO IMPROVE MOBILITY IN PERIPHERAL ARTERY DISEASE

2020 ◽  
pp. 100092
Author(s):  
Ayisha Z. Bashir ◽  
Danae M. Dinkel ◽  
Ganesh M. Bapat ◽  
Holly Despiegelaere ◽  
Mahdi Hassan ◽  
...  
Keyword(s):  
Peripheral Artery Disease ◽  
Peripheral Artery ◽  
Ankle Foot Orthosis ◽  
Artery Disease ◽  
Foot Orthosis

Nonlinear Control Techniques for a SMA Active Ankle Foot Orthosis

2007 ◽  
Author(s):  
Ehsan Tarkesh ◽  
Mohammad Elahinia
Keyword(s):  
Nonlinear Control ◽  
Sliding Mode ◽  
Nonlinear Behavior ◽  
Good Alternative ◽  
Switching Control ◽  
Experimental Result ◽  
Ankle Foot Orthosis ◽  
Control Techniques ◽  
Slow Walking ◽  
Foot Orthosis

This paper is aimed toward the development and evaluation of a novel active ankle foot orthosis (AAFO) based on shape memory alloy (SMA) actuators. This device intends to fill the gap in the existing research aimed at helping patients with drop foot muscle deficiencies as well as rehabilitation activities. To check the feasibility of this idea, a brief study is done on the dynamic behavior of ankle joint and then an SMA manipulator with a similar biological concept is used for experiment. Nonlinear behavior of SMA wires requires nonlinear control techniques such as Sliding Mode Controller (SMC) for tracking the desired ankle angle. Simulation results of three different techniques are compared (PID, SMC and SMC-PID) and finally the experimental result of a SMC-PID switching control is provided. This results shows that a switching control between simple PID and Sliding Mode Control can be a good alternative to follow the desired trajectory in slow walking cycles.

Toward a standard evaluation of Ankle Foot Orthosis in carbon fiber: Comparison between dynamic measurement techniques

2011 ◽  
Vol 33 ◽  
pp. S46-S47
Author(s):  
C. Donetti ◽  
J. Aleotti ◽  
I. Minari ◽  
A. Minari ◽  
S. Caselli ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Measurement Techniques ◽  
Dynamic Measurement ◽  
Ankle Foot Orthosis ◽  
Foot Orthosis
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