The effect of training using an upper limb rehabilitation robot (HEXO-UR30A) in chronic stroke patients: A randomized controlled trial

Abstract

Background: Upper limb robotic rehabilitation can be beneficial to the patients when applied appropriately. HEXO-UR30A is a novel exoskeletal type upper limb rehabilitation robot that provides continuous passive motion to the shoulder joint.

Objective: The purpose of this study is to evaluate the effectiveness of HEXO-UR30A on the patient's functional change, spasticity, and range of motion (ROM).

Methods: We included stroke patients with upper limb hemiparesis of age > 19 years with spasticity grading of modified Ashworth scale < 3 and Brunnstrom recovery stage ≥ 4. The efficacy of the robot was investigated based on a rehabilitation program for 3 weeks. Patient's functions were compared before vs after treatment and between the HEXO group vs control. We conducted the Fugl-Meyer Assessment of the Upper Extremity, modified Barthel index, modified Ashworth scale, ROM, and Motricity Index upper limb. Patients' satisfaction was evaluated using a questionnaire after every 10 sessions of training.

Results: In the HEXO group, the Fugl-Meyer assessment for shoulder improved significantly (P value = .006*) compared with the control group (P value = .075). Both groups showed significant improvement (P value < .05) in Motricity Index upper limb after treatment. There were some improvements in the passive and active ROM. Patients in the HEXO group reported high satisfaction with upper limb rehabilitation.

Conclusion: These results show that HEXO-UR30A can improve functional ability in chronic stroke patients. Moreover, the high satisfaction in patients might promote active involvement in upper limb rehabilitation.