156B Week 4

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

• • Purchased additional acrylic sheets, brackets, and laptop holder.

  • In progress of CAD-ing three versions of laryngoscope designs.

  • Brainstorming and CAD-ing a second design for the ramp. 

Accomplishments from Previous Week

• • Figured out the dimensions of the attachment required to angle the ramp at a certain degree. 

  • Started building ramp number 1 with the available materials - scissor lift mechanism

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

• • Finish building ramp design number 1 - Emeline

  • Finish brainstorming design number 2 to be built next week - Wendy

  • Print out at least 2 of the 3 laryngoscope designs - Brendon

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

• • Sponsor meeting (4/20/17) with Dr. Dan Lee

    • Liked the laryngoscope presented to him but asked for 3 other modifications for comparison.

      • In progress of CAD-ing the laryngoscope to be 3D printed.

    • Decided we should do numerous models to test out different designs.

      • Currently thinking about other ramp designs.

      • Incorporate a laptop leg joint as a hinge for the ramp.

      • Incorporate concepts from wood clamp design as a controlling mechanism to change ramp height. 

    • Suggestions for laryngoscope designs

      • Reduce the space that the tube will slide out of so that it can break free smoothly without too large of a gap.

      • Reduce the area of the tube that will slide out of a smaller area than the diameter of the tube and see if the design is practical. (incorporates a cone shape)

      • Eliminate the requirement that the tube needs to be able to slide out without taking out the back piece and create a cylindrical track without an escape path. 

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

• • Make sure all units are in METRIC! - Dr. T

  • Look into wood clamps for rough and fine adjustment - Pedro

    • Obtained wood clamps to learn how they work, courtesy of Dr. Dan Lee

  • Too ambitious to do the rotating pocket on laryngoscope - Dr. Silberman

    • Linear motion is easier to do than curving or rotating

  • Ask sponsor about using motors to adjust the height, like hospital beds - Dr. Silberman

    • Dr. Lee said he would prefer a mechanical device due to simplicity and reliability

  • Rack and pinion design - Pedro

    • Was a design we considered in the early stages of design but decided against it

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

• • N/A

Risks and Areas of Concern

• • The friction in the sliding motion of the ramp has not been tested, and we are assuming there is little friction on an acrylic-acrylic interface. 

  • Width of laryngoscope is sensitive to infant mouth size and therefore, some of our laryngoscope designs may not be applicable to smaller infants. 

Resources or Information Required but not Available

• • None

Schedule

• • Describe upcoming milestone- Finishing building ramp design 1 and printing of a minimum of 2 laryngoscopes.

Budget (list amount spent and amount remaining)

• • Spent: $97.94

  • Remaining: $1402.06

Progress on Report and Webpage

• • Webpage updated: Budget form, CAD, Progress Report

  • Report Progress: Impact on Society portion completed