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Fabricated from 3D printed nylon, machined delrin, and off-the-shelf parts
Gearbox and elbow cup 3D printed to achieve hard to machine geometry
Table, rotating armboard, armboard controller, and more machine out of delrin using mill and lathe
Rack and pinion, fasteners, and dowel pins purchased from McMaster
New design for ergonomics and improved controlled mechanisms, new materials for structural integrity
Elbow cup and table redesigned for patient comfort
Height adjustment mechanism and armboard locking mechanism fully functional
Delrin table and rotating armboard has increased structural integrity over MDF counterparts
Image 1 - Front view in initial position
Image 2 - Top view in initial position
Image 3 - Top view in final position
Image 4 - Front view in final position
Image 5 - Bottom view of board
Height Adjustable Table - Rack and pinion mechanism for controlled height adjustment using knob to get the table and arm across the patient's abdomen. Prior to adjusting the height, the patient's hand can be loaded into the rotating arm board using the arm board strap.
Rotating arm board - Once the table is at the desired location, the rotating arm can be unlocked from the knob underneath. While unlocked, the rotating arm board can be moved linearly using the arm board controller. The angle of the arm board can also be adjusted before locking the position back into place. The position and angle of the arm board will be set depending on the length of the patient's arm and other patient specific anatomy to get the left hand across to the right side of the body.
Elbow Cup - Once the position of the rotating arm board is set, the elbow cup and mount can be placed on the arm board controller. The elbow cup can be adjusted to have a secure fit against the patient's elbow. Securement from the arm board strap and elbow cup will keep the hand from drifting during the procedure.
Areas requiring improvement
Weight reduction
Adjust center of mass
Material or design changes to reduce table flex
Decrease wobbling of table column
Decouple elbow cup from arm board controller for more flexibility in location
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