Device for Acute Rehabilitation of the Paretic Hand After Stroke Team: Carly Brown, Sasha Cai Lesher- Perez, Justin Lundell, Mike Socie, Karissa Thoma BME 300/ Oct 2006
Client: Dr. Michelle Johnson Medical College of Wisconsin - Milwaukee Advisor: Prof. Mitch Tyler Dept of Biomedical Engineering UW- Madison
Overview Problem Statement PDS Summary Background Information Objective Arm Rest Alternative Designs Design Matrix Future Work Questions
Problem Statement Design portable device consisting of: simple, universal, comfortable attachment to impaired arm during rehabilitation after stroke.
PDS Summary Portable device Universal use Incorporate TENS unit 24” x 20” x 18” $750 Supination and pronation movement
Background Stroke Demographics Paralysis Rehabilitation Blood flow map of an ischemic stroke patient shows reduced blood flow in the right hemisphere of the brain (left side of the image)
Background Current Products TENS units EMS7500 Bioness TENS unit uses EMS Bioness H200
Objective To recover motion in hand 6 weeks in PT Supination/pronation 45º of rotation Additional rotation Engaging for the patient
Design Components Arm Rest/Constraint Interaction with the hand Patient Engagement
Arm Rest/Constraint Features Universal length Elevation Constraints Disadvantages Additional constraints
Design 1: Mechanical Features Joystick handle Mechanical interface Advantages Variety of wrist movements Disadvantages Maintenance Repetitive motion Manufacture- Robotics
Design 2: One-handed Features Supination/pronation Virtual Reality picture Advantages Finger dexterity Full rotation Engaging interface Disadvantages Restricted movement Difficult to interface
Design 3: Two-handed Features Both hand interaction Supination/pronation Virtual interface Advantages Greater interaction of user Disadvantages Only one movement Difficult interfacing Help to grip handle
Design Matrix MechanicalOne-handTwo-hand Patient Engagement (1-10) (1-10)579 Handle242 Ease of manufacture (1-10) (1-10)264 Variety of Movements 522 Comfort434 Ease of sanitation 522 Cost321 Total262624
Future Work Our design Two-handed Interchangeable armrest Circle handle Game interface
References Bastings, Greenberg, Good Hand motor recovery after stroke: a transcranial magnetic stimulation mapping study of motor output areas and their relation to functional status. The American Society of Neurorehabilation 16: Drabycz, S Stroke. The University of Calgary. Retrieved from on 15 Oct on 15 Oct on 15 Oct 2006 Elhendy, A. Health Center Online. Stroke Symptoms. Retrieved from on 7 Oct Hluštík, Petr, Mayer, Michal Paretic hand in stroke: from motor cortical plasticity research to rehabilitation. Neuropsychiatry, Neuropyschology, and Behavioral Neurobiology 19:
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