1. Intra-vitreal Injection
Client: Barbra Blodi, M.D.
Advisor: Paul Thompson
Group Members:
Mike Swift, Rajit Chakravarty, Mike Hallam, Anthony Nelson

2. Overview Background Description of product specification
Design Alternatives
Current idea
Future Plans
Conclusion

3. Background • Macular Degeneration Current Treatment
Degradation of cone cells
Current Treatment
Two Clinicians needed
Problems

4. Product Specifications
Slow injection rate
One handed grip and actuation
Work with existing 1 cc syringes
Reusability
Injection control
Stoppable
Accuracy

5. Design Alternatives
Hydraulic
Spring operated
Reusable case

6. Previous Work
Reusable case/ spring model

7. Previous Work
Locking Mechanism

8. Current Idea

9. Force & Displacement Diagrams/ Analyses

12. Equation Analyses
Computer program incorporating these equations -- EES

13. CAD Drawings

16. Free Space Model of Releasing Mechanism

17. Future Plans
Send designs and dimensions of the locking and reusable case mechanism to the ME shop
After completion of prototype, perform flow rate and efficacy tests of the system on cow eye ball
Further modifications on design after testing

18. Conclusions
Problem:
Modify syringe to allow single clinician to perform injections
Proposed Solution:
Modified Reusable Case Mechanism
Future work:
Build workable prototype of new design Begin prototype testing