Dose and staffing comparison study of upper limb device-assisted therapy

Area of Science:

• Neuroscience
• Rehabilitation Medicine
• Biomedical Engineering

Background:

• Neurological injuries frequently lead to lasting upper extremity motor deficits.
• Device-assisted therapy is a growing approach in neuro-rehabilitation, enabling intensive, standardized practice.
• This study focuses on optimizing device-assisted therapy for chronic upper limb paresis.

Purpose of the Study:

• To evaluate how therapy duration (30 vs. 60 minutes) impacts outcomes.
• To determine the effect of staff-participant configuration (1-to-1 vs. 1-to-2) on therapy effectiveness.
• To analyze these factors in individuals with chronic upper limb weakness post-neurological injury.

Main Methods:

• Forty-seven participants with chronic upper extremity deficits were enrolled.
• Intervention involved 3 weekly sessions for 6 weeks using the Armeo®Spring device.
• Participants were assigned to either 30 or 60-minute sessions and 1-to-1 or 1-to-2 staff ratios.

Main Results:

• All groups showed improvement in upper limb impairment, measured by Fugl-Meyer (FM) scores.
• Therapy duration (30 vs. 60 minutes) did not significantly alter FM improvement.
• The 1-to-2 staff-to-participant ratio yielded significantly greater FM improvements compared to the 1-to-1 ratio.

Conclusions:

• Device-assisted therapy effectively reduces upper limb impairment.
• Therapy session duration (30 vs. 60 minutes) did not influence outcomes.
• A 1-to-2 staff-to-participant configuration is a feasible and more effective model than 1-to-1 staffing for this therapy.