I understand that you will be doing something extreme, but not in Switzerland?
At a minimum, you should have Rega so they can get you back to a Swiss hospital.
http://www.rega.ch/en/home.aspx
If you have an iPhone, you should also get the
iRega app from iTunes store. it is free.
You could also look at TCS travel insurance (either Europe only or World). It might help as well.
Here is the French page:
http://www.tcs.ch/main/fr/home/assis...ti_reisen.html
They also offer an insurance for long-term care (after accident) in another country.