156B Week 6

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

• • Prototype is ready to be assembled (partially done) so that testing can be done as soon as possible.

Accomplishments from Previous Week

• • Completed first draft of report

  • Second 3D printed part was completed

  • Acrylic was cut

  • Applied 2 coats of polyurethane sealant to 3D parts

  • Partial assembly done: reservoir wall (glued and sealed) and parts to hold helper hands.

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

• • All - Complete assembly of prototype and make sure that it is indeed sealed, fix any apparent problems

  • All - Present prototype to sponsor and see what he thinks and if he can get a specimen to test our design.

  • Jasmine - update website as needed (add CADs to annotated home page)

  • Will - Submit forms to be reimbursed

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

• • Sponsor is excited to see our prototype and was informed that we ran into issues since the 3D printer and Lasercamm were out of service.

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

• • All comments were in person.

  • Since the peristaltic pump is automatic, is there any chance the flow of liquid will get blocked?

    • No, that is not at all a concern

  • How will you determine whether or not your project is helpful for the doctor?

    • If the images obtain are clear.

    • If sponsor determines that setup is easier.

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

• • All comments listed below are from the comments sheet during Proof of Concept presentation

  • Contamination? -John Lau

    • There will be a coating of polyurethane sealant on the entire chamber. The chamber will be flushed out with water then saline solution.

  • What's the lifetime for the part? -Joseph Miller

  • Currently unknown but the cost to reproduce the part is very inexpensive.

  • What if the overflow rate is much faster and the fluid overflows from the top? Is that a concern? - Deval Panchal

    • No, we calculated that if all saline solution is used and if all of it leaked out of lung that it will have no chance of overflowing. 

  • Can the sealant just be sprayed once or will it have to be reapplied? -Alex Parra

  • Polyurethane sealant only needs to be applied once.

  • Will the 3D printed material hinder imaging? -Richard Holm

    • No, microscope objective will be in contact with the lung.

  • Is there a locking mechanism or a way to see the chamber is fully shut by the o-ring? -Vik Joga

    • Test for leakage, see if our design creates a good seal. 

  • What are the acrylic parts used for? -Sheryl Chau

    • They are used for the overflow reservoir

Risks and Areas of Concern

• •  All previous concerns have been addressed, now just need approval of a successful prototype from sponsor.

Schedule

• • Complete prototype assembly

  • Test prototype

  • Fix any problems, if necessary

Budget (list amount spent and amount remaining)

• • Purchased polyurethane sealant: $20.28.

  • $74.86 has be spent on materials to date with a remaining $425.14 left within our budget.

Progress on Report and Webpage

• • First draft of report has been completed, additions and editing will be done continuously throughout the rest of the quarter.