For week 4, We focused on modules,  Comsol introduction, and Shake down testing.

 1. we brainstormed the modules that our  designs will accomplish and brainstormed different ideas on how we can put the modules in action/ How our design will function .
Below are the mind maps, developed using coggle  of the 6 modules ( functions) that our design will have to accomplish.

1. Getting blood from the body




2. Injecting nanoparticles


3. Creating turbulence, to increase the chance of binding between cancer cells and magnetic nanoparticles



4. Collecting Magnetic Nanoparticles


5. Extracting Magnetic Nanopartilces from the site of collection



6. Returning the Blood into the Body




2. We also had a comsol study session with Dr. Xi ( Right figure), Below are pictures of what we talked about and started to model( as a tutorial (left figure)) in comsol for the rest of the week.








3. Apart from that, we developed a testing plan for our most delicate part of the design.

Our plan is to test how much time it would take to circulate a large amount of blood through the body. For our purposes, we will use water. We also want to watch for the presence of air bubbles during the test. Air bubbles can be lethal if introduced into the bloodstream. We intend  to use 16 or 17 gauge needle which are commonly used for blood transfusion to  connect tubing to the blood  and to return the blood to the blood vessel They use low pressure, hence avoid blood cell damage and allow for quick blood transfusion. The vein that is usually used for blood draws is the medial cubital vein. It has an average inner diameter of 1.8 +/- 1.1 mm (vein size ). We should use semi flexible thin walled tubing of approximately 2mm inner diameter to mimic this vein. The water will pass through the needle into more rigid slightly larger tubing where it will flow through another 16 or 17 gauge needle into another 2mm tube.20171008_220712.jpg


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