156B Week 4

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

• • Fabrication on a smaller scale prototype is in progress.

  • Spray mechanism design in progress 

  • Implementation and experimentation testing on spray in progress

Accomplishments from Previous Week

• • Presented spray mechanism idea to sponsor for approval

  • Orders on key components have been received. 

  • A new prototype of design in smaller scale with required dimensions has been built for pratical testing

  • The new prototype sucessfully fit inside all different size of endotrocheal tube.

  • For material choice we finalize EVA as the optimal tube material since it provided the least friction, however, it did feel a bit sticky for the smallest endotracheal tube.

  • Manufactured spray tip with different size (60 and 80 drill bit)of end hole for optimal mist spray, unfortunately both size of spary hole fail, an outlet of streamline instead of mist.

Goals for Next Week (list names after each item). Use specific and measurable objectives.

• • Implement an even smaller hole for spray of mist, or alternative approach for the mechanism 

  • Full, completed prototype build-up

  • Risk reduction test on the potential problem

  • Bend the tube into different shape to find the minimum bending radius

  • Update all necessary numerical data dimension of the prototype for theoretical and conceptial analysis

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments

• • Sponsor was satisfied and approved the sprayer design

  • Sponsor provided an example of existing sprayer tip for examination

Instructor Comments from Last Meeting and Actions Taken to Address these Comments

• • Concise analysis of minimum bending radius on small-scaled prototype in final report

  • Notice and be prepared for potential problem since every component is shrink into much smaller size than the existing built prototype

Risks and Areas of Concern

• • Failure of spray tip in form of mist

  • The decrease of minimum bending radius 

  • Difficulties on manufacturing a spray tip for a mist form. (CNC might need to be use due to the complexity)

Resources or Information Required but not Available

• • N/A so far.

Schedule

• • Describe upcoming milestone

Implement an optimal sprayer design for successful mist delivery of anesthesia

• • Update Gantt chart.