http://www.ebay.com/itm/Biomet-09575-Fi ... 6816wt_924
This device which was likely removed from a patient, is designed to hold the two segments of a fractured long bone in position while healing.
Threaded pins are drilled into the bone and held clamped in place and immovable by devices like this one. They are called external fixation devices. Their main use is when someone wrecks their motorcycle and has a dirty open comminuted fracture of the the lower extremity.
They try to give these devices as many degrees of freedom of movement as is possible in order to allow the surgeon to adjust the reduction (ie. positioning ) of the fracture. The more degrees of freedom they offer the more complex the device becomes.
Anyway since the mechanical loads of our specimen subject positioning are a tiny tiny fraction of orthopedic surgery loads, this might make a nice positioner. No one who uses them for orthopedics in the USA will pay anything for this. Someone in the third world might.
I would offer them $50 if it looks like it might be handy.
Medical positioning device
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