A haptic-robotic platform for upper-limb reaching stroke therapy: preliminary design and evaluation results

Area of Science:

• Biomedical Engineering
• Rehabilitation Science
• Human-Computer Interaction

Background:

• Intense training improves post-stroke upper-limb function, but access to rehabilitation is often limited.
• Stroke survivors face challenges with therapist and equipment availability for consistent exercise.
• A novel haptic-enabled platform is proposed to enhance upper-limb rehabilitation accessibility.

Purpose of the Study:

• To develop and evaluate a haptic-enabled exercise platform for stroke survivors' upper-limb reaching motion therapy.
• To integrate an anthropometrically-inspired design for maximized range of motion.
• To incorporate unobtrusive postural sensing and vibratory elbow stimulation.

Main Methods:

• A multi-disciplinary team designed a prototype system including an exercise device, postural sensors, and elbow stimulation.
• Eight physical and occupational therapists participated in a pilot usability study.
• Feedback was collected via questionnaires and quantitative data analysis.

Main Results:

• The haptic exercise device received positive usability scores (7/9 questions > 3.0/4.0).
• Postural sensors demonstrated high accuracy in detecting abnormal (97%) and normal (94%) postures.
• The elbow stimulation device received lower usability scores, with therapists deeming the system effective without it.

Conclusions:

• Therapists considered the haptic exercise platform a valuable tool for upper-limb rehabilitation.
• The prototype demonstrated good design and capability for reaching task therapy.
• The project is advancing to clinical trials with stroke patients.