Device for Acute Rehabilitation of the paretic hand after stroke Team: Carly Brown, Sasha Cai Lesher-Perez, Nathan Kleinhans, Lee Linstroth

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

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

Background: Rehabilitation Robot – aided therapy Supination / pronation of the wrist Flexion / extension of hand Mechanical system Visual cues MIT-Manus robot – aided therapy device

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.

Our system: Components Limit Switches Hand Grasper Wrist Rotator Casing

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

Our system: New look Sketches by Martin Gutierrez

Our system: Program What level is the patient at? O Low O Medium O High 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

Testing: Clinicians n = 5 Prototype demonstration Time trials Evaluated with paired t-test Heuristics evaluation Evaluated with Mann-Whitney test

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

Questions