156B Week 5

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

• • A total of three laryngoscope blade designs were printed, each having slight variations based on sponsor feedback

  • Currently in progress of CAD-ing another blade design to send to sponsor before printing

  • A design for the ramp has been decided on and a rough prototype has been built

    • Sponsors are in favor of using hinges found on an adjustable laptop stand, so this method has been implemented

Accomplishments from Previous Week

• • Two more laryngoscope blades were printed

  • Narrowed down potential ramp designs to one

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

• • Determine design for ramp cover, including materials, shape, and cost - Emeline

  • Modify ramp with new hinges if they arrive on time - Wendy

  • Adjust laryngoscope blade designs as needed based on sponsor feedback - Brendon

  • Record data with sponsors from testing laryngoscope blades on mannequins (only possible to test during sponsor meetings) - Everyone

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

• • Meeting on 4/27/17

    • Laryngoscope Feedback

      • Positive response to current designs - the tunnel on version 1 of the blade is large but allows for various tube sizes to slide through

      • Suggested shortening the length of the tunnel and angling the tip more

      • Suggested shaping the tunnel such that the tube can be pre-loaded in the blade prior to intubating

    • Ramp Progress Feedback 

      • Sponsor is in favor of using the idea of locking hinges, similar to those used in laptop stand

        • Not in favor of using pipe clamp idea or scissor lift idea

      • Sponsor has ordered us adjustable locking hinges that change in increments of 10 degrees

      • Sponsor provided us with a cell phone stand that has a locking hinge for design inspiration

Instructor Comments from Last Meeting and Actions Taken to Address these Comments  (indicate date of comments and if via email or in person)

• • Meeting on 4/26/17

    • Laryngoscope Feedback

      • Suggested asking sponsors if w can get a practice doll for testing purposes (Silberman)

        • Asked sponsors and they are not able to give us an intubation head to practice with; we are only able to use it when we meet

    • Ramp Progress Feedback

      • Suggested using bands of spring steel instead of hinges for ramp surface connection (Dr. T and Pedro)

        • Spring steel is flexible and fatigue life is good

      • Suggested looking at the concepts behind pipe clamps for coarse and fine adjustment - (Dr. T)

        • Purchased pipe clamp and discussed this with sponsor - Sponsor is not in favor of using the pipe clamp

      • Suggested asking sponsor about acceptable materials in a medical setting (Silberman)

        • Asked what kind of chemicals are used to sterilize medical instruments

      • Slabs of silicone might be a better option than acrylic because of acrylic's brittleness 

        • Potential slabs of rubber can be Delrin or nylon

  • Next meeting on 5/4/17 in Jacobs Medical Center

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

• • NA

Risks and Areas of Concern

• • Using laptop stand legs as adjustable ramp component is more aesthetically pleasing but requires a two-handed operation

    • These hinges also allow for course adjustment, but not fine adjustment; We need to test to see if having increments of 10 degrees is fine enough to create a good visual

  • The current blade designs were able to fit inside the mouth of the mannequin, but are too wide and thick for an infant of smaller size

Resources or Information Required but not Available

• • NA

Schedule

• • Put the finalized ramp concept together and begin testing with realistic weight and size constraints

Budget (list amount spent and amount remaining)

• • Spent: $119.86

  • Amount Remaining: $1380.14

Progress on Report and Webpage

• • Report Rough Draft is in progress and will be completed by Friday, May 5th

  • Webpage budget sheet and reports are updated