Science has been talking about doing this for decades. Now it may be a reality....
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At a hospital in Pittsburgh, surgeons are now allowed to place patients into a state of suspended animation. If a patient arrives with a traumatic injury, and attempts to restart their heart have failed ? if they?re on the doorstep of death ? they will have their blood replaced with a cold saline solution, which stops almost all cellular activity. At this point, the patient is clinically dead ? but if the doctors can fix the injury within a few hours, they can be returned to life from suspended animation by replacing the saline with blood.
http://www.extremetech.com/extreme/1...imation-trials