1. Device for Acute Rehabilitation of the Paretic Hand After Stroke Team: Carly Brown, Sasha Cai Lesher- Perez, Justin Lundell, Mike Socie, Karissa Thoma BME 300/200 20 Oct 2006

2. Client: Dr. Michelle Johnson Medical College of Wisconsin - Milwaukee Advisor: Prof. Mitch Tyler Dept of Biomedical Engineering UW- Madison

3. Overview  Problem Statement  PDS Summary  Background Information  Objective  Arm Rest  Alternative Designs  Design Matrix  Future Work  Questions

4. Problem Statement Design portable device consisting of: simple, universal, comfortable attachment to impaired arm during rehabilitation after stroke.

5. PDS Summary  Portable device  Universal use  Incorporate TENS unit  24” x 20” x 18”  $750  Supination and pronation movement

6. 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) http://www.imaginginformatics.ca/research/stroke

7. Background  Current Products  TENS units  EMS7500  Bioness  TENS unit uses EMS 7500 http://www.promolife.com/products/tens.htm Bioness H200 http://www.bionessinc.com/products/h200.htm

8. Objective  To recover motion in hand  6 weeks in PT  Supination/pronation  45º of rotation  Additional rotation  Engaging for the patient

9. Design Components  Arm Rest/Constraint  Interaction with the hand  Patient Engagement

10. Arm Rest/Constraint  Features  Universal length  Elevation  Constraints  Disadvantages  Additional constraints

11. Design 1: Mechanical  Features  Joystick handle  Mechanical interface  Advantages  Variety of wrist movements  Disadvantages  Maintenance  Repetitive motion  Manufacture- Robotics

12. Design 2: One-handed  Features  Supination/pronation  Virtual Reality picture  Advantages  Finger dexterity  Full rotation  Engaging interface  Disadvantages  Restricted movement  Difficult to interface

13. 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

14. 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

15. Future Work  Our design  Two-handed  Interchangeable armrest  Circle handle  Game interface

16. References  Bastings, Greenberg, Good. 2002. 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 16:275-282.  Drabycz, S. 2006. Stroke. The University of Calgary. Retrieved from http://www.imaginginformatics.ca/research/stroke on 15 Oct 2006. http://www.imaginginformatics.ca/research/stroke on 15 Oct 2006 http://www.imaginginformatics.ca/research/stroke on 15 Oct 2006  Elhendy, A. Health Center Online. Stroke Symptoms. Retrieved from http://heart.healthcentersonline.com/stroke/stroke3.cfm on 7 Oct 2006. http://heart.healthcentersonline.com/stroke/stroke3.cfm  Hluštík, Petr, Mayer, Michal. 2006. Paretic hand in stroke: from motor cortical plasticity research to rehabilitation. Neuropsychiatry, Neuropyschology, and Behavioral Neurobiology 19: 34-40.

17. ¿Preguntas?