156B Week 6

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

• • Iteration #4 of the laryngoscope blade is being printed with a curved backboard

    • iteration will also be able to house a light source, mimicking design of blades on the market

  • Implementing hinges capable of 10 degree increments into construction of ramp

Accomplishments from Previous Week

• • CAD-ed another version of the laryngoscope blade

  • Received from sponsor and experimented with 10 degree increment hinge

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

• • Have a fully built ramp by the end of Week 7 - Everyone

  • Have a design developed for the ramp cover - Emeline

  • Fine-tune the laryngoscope design as needed - Brendon

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 5/4/17

    • Laryngoscope Feedback

      • Comments from Jae: "This is great, I love this." "I don't even have to think with this"

      • Move the light source to the side for better visualization and angle it inwards instead of straight down, so that the light will come from the top and tube will come from the bottom

      • Stylets can kill the infant, so avoid using those at all cost

      • Make the blade backboard curved instead of flat (the configuration currently used)

      • Can drop the tunnel a few millimeters but not too much so that the overall blade isn't too thick

      • In next blade iteration, make it attachable to the current battery-powered handle and connect to the light source for more accurate testing

    • Ramp Feedback

      • Acquired a sample mannequin roughly 4 kilograms in mass to test on the current ramp configuration

        • Seeing how the infant would rest on the ramp, the ramp plate dimensions need to be adjusted to make the head plate shorter and body plate longer in order to make the angling process more efficient

          • Body plate ~ 38 cm long, head plate ~ 13 cm long

      • Received new locking hinges that change in increments of 10 degrees

      • Sponsor Jae prefers having flexible plastic over the ramp so that the surface is smooth and has a smooth hinge action

        • Need to ask Tom for input regarding current hinges for ramp and incorporating light source into next blade prototype

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

• • Proof of Concept Presentation 5/3/17

    • Plan for laryngoscope blade material

      • Even if sponsor only wants a proof of concept, it is our responsibility to recommend what material to use (Dr. T)

      • Look into Proto Mold for an estimate

      • Talk to Tom about machining this part

    • Look at the numerical results from the Solidworks simulations. Numbers are more important and the deformations depicted are exaggerations

    • Smooth out the edges and surface of the 3d printed blade so the tube won't get caught

    • Is the two-handed operation okay with the sponsors? (Silberman)

      • Yes, this is design is preferred by the sponsors due to the simplicity and compactness of the design

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

• • Consider using a metal tube for more rigidity

  • Use a magnet to hold the tube in place and release

    • To address this comment: One of the current methods of intubating is by inserting a metal stylet down the tube to stiffen it. However, this has been proven very dangerous and lethal to some patients due to perforation of the trachea from the stylet, so we are attempting to move away from it.

  • Use a fishhook design instead of tube attachment

Risks and Areas of Concern

• • The newly received locking hinges that change in increments of 10 degrees require more force than is expected to change the angle

  • Machining the laryngoscope blade will be extremely difficult due to its size

Resources or Information Required but not Available

• • N/A

Schedule

• • Have the ramp built by the end of Week 7

  • 3D Print another iteration of laryngoscope blade by end of Week 6 (to show sponsors)

  • Talk to Tom and Ian about machining the blade with plastic/metal

  • Gantt Chart

Budget (list amount spent and amount remaining)

• • Spent: $119.86

  • Amount Remaining: $1380.14

Progress on Report and Webpage

• • First draft of report submitted 5/5/17

  • Webpage up to date