1. Custom Ergonomic Workstation Group 3 Jim Herbst Jr. BME 272/273 2001-2002 3 rd Oral Presentation 3/28/02 Dr. Paul King Dr. Ed Glaser

2. Objectives Reduce office injuries related to a sedentary lifestyle Invent a casting process which can be administered in a doctor’s office Design and prototype the first complete one-piece fully customized ergonomic workstation

3. Market Potential/Target Market Growing amount of computer-based jobs Growing amount of posture-related injuries Growing awareness of ergonomics Target those with 4+ hours daily computer time Target those with current/prior serious back problems Target those already frequent chiropractor

4. Injuries To Be Prevented Most frequently cited physical complaints among seated employees:

5. Habitual Posture Influences kinesthetic awareness Sitting posture – Stretches shoulder blades and back – Shortens chest, hips, and shoulders “Normal” posture places low back in a lordosis Neutral alignment results in the least amount of muscle energy

6. Biomechanical Goal Provide therapeutic benefit Reduce muscle energy expenditure Place back in a neutral alignment

7. Anatomy of the Back Normal curvature is S-shaped Curvature can deviate due to muscular imbalance 80% Americans have faced low back pain Ages 25-60 have highest probability to complain

8. Lordosis: A Closer Look

9. Done Since Last Presentation Prepare back for mold Make mold

10. Chair Back

11. Prepared Back File down large nicks with sandpaper Smooth out minor nicks mechanically

12. Cutting PVC Trace with wax pen Cut

13. First Problem PVC sheet placed on back and three heat guns were used to form Heat not distributed uniformally Caused wrinkles

14. Vacuum Forming Technique of choice Apparatus was too small Had to cut the PVC in half Had to cut the cast in half

15. Vacuum Forming Cont.

17. Attaching Sections

18. Final Chair Need to create larger vacuum forming apparatus Need to reduce sides

19. Future Work Pad chair Attach Legs Attach Arms Comfort Test Revise Create Compatible Workstation

20. Workstation Design Trunk-Upper Leg angle 110-120 degrees Angled Upper Leg-Lower Leg angle greater than 90 degrees Footrest angle 15-25 degrees above horizontal Cutout angled desk with adjustable height controls Monitor within normal line of sight

21. Works Cited www.ergonomic-solutions.com/p_seat.html www.infinn.com/infopack.html www.prbofficeinteriors.com/aeron/aeronde sign.htm http://condor.depaul.edu/~atamulis/ergo- 4.html www.ergoboy.com/ergo_for/office.php http://www.patientfixation.com/productty pes/custom-molded-body-cushions.asp