http://www.ted.com/talks/mark_roth_suspended_animation.html
and he is selling the shot via his company Ikaria:
http://www.drugs.com/clinical_trials/ikaria-completes-dosing-phase-1a-clinical-study-ik-1001-sodium-sulfide-4322.html
this should be part of every cryopreservation protocol out there, and
our own personal first aid kits (who wants to produce a transhumanist
first aid kit, we would have lots of demand in the coming decade).
The idea is simple, shut off the body's desire to keep its temperature
high and THEN begin the cooling stage. The injection would be
administered at the first sign of serious trauma, someone puts you in
a bathtub with cold water, you have hours of healthy deanimation while
you wait for full cryo or emergency medical treatment to get back on
your feet.
cheers,
tudor