Minute - February

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• We had a group meeting after EID103 class session to discuss individual sketches and decide group's best idea sketches.
• Found several strengths and weaknesses of our individual drawings.
• So, we brainstormed ideas about our design and made certain improvements such as better slide-open rid that also lifts up allograft parts and fool-proof mechanism that doesn't let the rid open too quickly.
• We worked on finishing group sketches and ended up drawing three more new sketches.

• Link : Initial Sketches

• We finalized our group sketches.

• Meeting with Prof. Lima.
• We discussed about the problems and established objectives of next few weeks.
• We set up a meeting with Daniel Gitzel for demonstration of 2011 allograft preservation pump system.

• Meeting with Daniel Gitzel
• Daniel designed and programmed a pump system using a diaghragm pump (better for removing liquid), peristaltic pump, and arduino control system.
• He gave us all documents from last year's project.
• He showed us where all the necessary parts were stored.
• He briefly explained how the system work.

• However, the pump that he used is not available right now, therefore we will have to use different pump.
• The control system needs to be modified for a new pump.

• General Meeting
• Progress and objects were discussed - we need to re-build the pump system.
• We made a first draft of problem statement.
• We discussed about the time line (Tentative schedule)

• General Meeting
• Progress and goals were discussed
• We need to verify that impulse sealer works with the thick IV bag.
• Find another peristaltic pump available
• Find a large container to store a knee
• Design a system that uses IV bag instead of sterile container.
• Work on making an IV bag with input and output valves.

• After few trials, we figured out a method to successfully sealing IV bag: Set impulse sealer dial at 8 and quickly press down firmly three times)
• We discussed how the tubing system will be.

• Link : Sealing IV bag with impulse sealer

• Successfully operated the pump system comprised of a peristaltic pump, a diaphragm pump, and four chambers with manually caliberated pump rates.
• We decided to use Tupperware for solid chamber.

• Link: First successful run of the pump system

• We made a first design of IV bag with input and output valves.
• We used an IV bag with 2 tubes.
• Attached valves that enables us to control flow directly.

• Link : IV bag with input/output valve

• IV bag passed the No Leak Test.

• We met with Daniel Gitzel for an advice on operating the arduino control system.
• We worked on putting the pump system together.

• Met with Prof. Lima and talked about purchasing media bags and containers.
• Discussed about which tubing size is ideal for the project.
• We decided to finalize our BOM soon.