Apart from the fact that legally a standby team is not allowed to perform this procedure on the living, the process to vitrify your body would basically kill you in the process! If we were to do this before legal death, that would be considered homicide!
Cryoprotectant solutions at warm temperatures are toxic to the human body. Only at cryogenic temperatures are they not harmful. Despite the toxicity, scientists are working to reduce, counteract and even remove it altogether from cryoprotectant solutions. However, this process will take time, as rewarming is one of the key challenges of cryopreservation.
Although members of cryonics organizations expect to be revived in the future, this is not yet possible. Perhaps, maybe once medical technologies have advanced in the future, cryopreserving the living may be a possibility. However, until revival technology is developed, cryopreserving a living patient would mean certain death.
