Device for Acute Rehabilitation of the paretic hand after stroke

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Device for Acute Rehabilitation of the paretic
hand after stroke

• Team Carly Brown, Sasha Cai Lesher-Perez, Nathan
  Kleinhans, Lee Linstroth

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Client Dr. Michelle Johnson Medical College of
Wisconsin - Milwaukee
Advisor Prof. Mitch Tyler University of
Wisconsin Madison
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Background Stroke

• Affects 700 000 each year
• Occurs mostly in people over the age of 65
• Results in
• Hemiplegia
• Loss of memory
• Loss of verbal skills
• Death

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Background Rehabilitation

• Robot aided therapy
• Supination / pronation of the wrist
• Flexion / extension of hand
• Mechanical system
• Visual cues

MIT-Manus robot aided therapy device
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Problem Statement

• Design a portable rehabilitation device, which is
  automated, universal, comfortable and will assist
  rehabilitation of supination / pronation of the
  wrist as well as finger flexion / extension
  during the acute phase post-stroke.

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Our system Components
Limit Switches
Hand Grasper
Wrist Rotator
Casing
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Our system Safety

• Switch will be depressed by peg on wrist rotator
• Degree adjustable depending on abilities of
  patient in both supination and pronation
  directions

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Our system New look
Sketches by Martin Gutierrez
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Our system Program
Which hand will be used? O Right O Left
What are the setting of the limit
switches? Pronation Supination O 40 O 40 O
50 O 50 O 60 O 60 O 70 O 70 O 80 O
80 O 90 O 90
What level is the patient at? O Low O Medium O
High
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Testing Clinicians

• n 5
• Prototype demonstration
• Time trials
• Evaluated with paired t-test
• Heuristics evaluation
• Evaluated with Mann-Whitney test

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Testing Patients

• n 5
• Use device over 10 sessions
• Evaluate at 1st, 5th and 10th sessions
• Grip strength
• Active wrist range of motion
• Subjective evaluation

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Questions