Design of a clinically relevant upper-limb exoskeleton robot for stroke patients with spasticity

The purpose of this research is to propose a design of a clinically relevant upper-limb (hand, wrist, and elbow) exoskeleton that meets the clinical requirements. At first, the proposed robot was designed to have sufficient torque for passive exercise therapy and spasticity measurement of post-stroke patients with spasticity (grade 3 or lower in Modified Ashworth Scale). Because the therapy of patients with high level spasticity could be laborious for therapists by increased muscle tone, and the patients tend not to get enough rehabilitation treatment. Secondly, this robot was designed to have user friendly features like as modularity, so that users have easy approach to assemble and disassemble for practical use. Thirdly, this robot system was designed to guarantee the safety for robot-aided passive training of patients with spasticity. As a result, we were able to see the usability of the robot system, even though it was a pilot test. This shows the possibility of measuring and classifying the spasticity.

[1]  J. Tang,et al.  A Configuration-Space Approach to Controlling a Rehabilitation Arm Exoskeleton , 2007, 2007 IEEE 10th International Conference on Rehabilitation Robotics.

[2]  Sang Ho Ahn,et al.  The effect of a stretching device on hand spasticity in chronic hemiparetic stroke patients. , 2011, NeuroRehabilitation.

[3]  Ping Zhou,et al.  Correlation of Resting Elbow Angle with Spasticity in Chronic Stroke Survivors , 2015, Front. Neurol..

[4]  Richard W. Bohannon,et al.  Interrater reliability of a modified Ashworth scale of muscle spasticity. , 1987, Physical therapy.

[5]  Neville Hogan,et al.  Impedance Control: An Approach to Manipulation: Part II—Implementation , 1985 .

[6]  Erkin Gezgin,et al.  Synthesis of a Watt II six-bar linkage in the design of a hand rehabilitation robot , 2016 .

[7]  E. Rocon,et al.  Design and Validation of a Rehabilitation Robotic Exoskeleton for Tremor Assessment and Suppression , 2007, IEEE Transactions on Neural Systems and Rehabilitation Engineering.

[8]  Hyung-Soon Park,et al.  IntelliArm: An exoskeleton for diagnosis and treatment of patients with neurological impairments , 2008, 2008 2nd IEEE RAS & EMBS International Conference on Biomedical Robotics and Biomechatronics.

[9]  Marcia K. O'Malley,et al.  Mechanical design of a distal arm exoskeleton for stroke and spinal cord injury rehabilitation , 2011, 2011 IEEE International Conference on Rehabilitation Robotics.

[10]  J. O. Søjbjerg,et al.  The stiff elbow. , 1996, Acta orthopaedica Scandinavica.