====== Initial Sketches on Allograft Preservation Chamber ======

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    *These are sketches of the current allograft chamber.
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    *Left. This chamber allows ease for the fluid to flow down to the waste exit. 
    *Right. This chamber can hold 6 tissues. 
    *Bottom. This is the internal display of how the fluid is circulated. It is easier to change the fluid by pouring the new fluid in one valve instead of pouring to 6 separate valves. Also, all the waste exits from one output, instead of 6 separate outputs.
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    *These chambers hold multiple tissues. There are removable slides to place tissue. 
  -{{:start:classes:principlesofdesign:allograftpreservation_2012:david_chen_s_sketch_4.jpg?1000|}}
    *Top. Another multi-chamber design.
    *Bottom. A pH indicator might be necessary to keep the fluid in check. 
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    *Top Left. A permeable layer allows the waste to settle to the bottom.
    *Bottom Left. Similar to sketch 1, an incline eases the fluid flow.
    *Right. Stackable chambers make storing and transportation easier.
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    *Top Left. An additional top permeable layer holds tissue in place. This reduces the movement of the tissue allowing more protection during transportation. 
    * Bottom Left. Additional side permeable layers increase the protection.
    * Top Right. The fluid changes color when the fluid becomes contaminated.  
    *Bottom Right. A flow rate measuring device gives the user more control on the flow rate.
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    *Top Right. The permeable layers are adjustable in width. 
    *Bottom. The top and bottom layers have holes on the edges to allow the side layers to be inserted. 
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    *Top Left. The lid of the chamber give an access for a thermometer to check the fluid temperature.
    *Top Right. A digital display of the temperature, pH, duration of the tissue experiencing low/high temperature, warning signs, etc significantly helps the user know the tissue's condition.
    *Middle Right. A vacuum  access to allow a vacuum to take out air that might contaminate the tissue.
    * Bottom Right. The sides of the chamber have slits on the walls which allows the top layer to be adjustable in height. But this causes the top layer to unstable.
    * Bottom Left. A sketch of all the features combined.