Intra-vitreal Injection

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Intra-vitreal Injection

• Client Barbra Blodi, M.D.
• Advisor Paul Thompson
• Group Members
• Mike Swift, Rajit Chakravarty, Mike Hallam,
  Anthony Nelson

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Overview

• Background
• Description of product specification
• Design Alternatives
• Current idea
• Future Plans
• Conclusion

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Background

• Macular Degeneration
• Degradation of cone cells

• Current Treatment
• Two Clinicians needed
• Problems

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Product Specifications

• Slow injection rate
• One handed grip and actuation
• Work with existing 1 cc syringes
• Reusability
• Injection control
• Stoppable
• Accuracy

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Design Alternatives
Reusable case
Spring operated
Hydraulic
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Previous Work

• Reusable case/ spring model

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Previous Work

• Locking Mechanism

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Current Idea
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Force Displacement Diagrams/ Analyses
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Equation Analyses

• Computer program incorporating these equations --
  EES
  

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CAD Drawings
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Free Space Model of Releasing Mechanism
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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

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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