How would people be revived from cryonic suspension?

Question

Is there any ideas about how people would be fixed from the damage done from "declared death", freezing, ageing and otherwise in the future?

Answer 1

Accepting medical science that the brain is the primary seat of personality and memory, we need to address those specific structures in the brain that deal with these things. Auto-motor skill areas that are not repaired fully might be coaxed into repair by future brain medicine, but the main memory areas are critical to successful revival. Given that and given a rational view that human cloning will be eventually viable with the number of demonstrably other successful mammal clones making the news with increasing frequency, then concentrating on two time frames is important:
First the pre-cryonics period. Under an optimal suspension, the patient suffers little ischemic damage as a result of a combination of factors. A do-not-rescussitate order and a doctor willing to pronounce death rapidly based upon clinical criteria (cessation of breathing and pulse) allows the transport team to begin cooling the patient in a ice bath and the resumption of blood circulation to prevent oxygen deprivation damage to the brain (i.e. a stroke). Anti-blood clotting agents further assist in ensuring that the patient circulation flows smoothly. With rapid ice water circulation, the patient decreases metabolic demand for oxygen and energy by about 50% for every 10 degrees.
Once cooled to just above the freezing point of water, a temperature at which modern cryosurgeries are often performed with the heart fully stopped, blood is replaced by a glycerine solution which acts to draw water out of cells and prevents ice crystal formation very effectively. Combined with "flash freezing" which is technically called vitrification, the patient avoids ice crystal formation AND avoids water expansion.
The Second timeframe of significance is not the long years of lN2 (liquid nitrogen) storage, but rather the revival itself. Scientific experiments as far back as the 1960's have successfully vitrified sheep heads and thawed them. The sheep heads SPONTANEOUSLY resumed near normal EEG activity when this occurred. Encouraging that untreated and unmedicated sheep heads can do so.
It is unfortunate that many critics here would concede that our ability to freeze kidneys, livers and other organs for medical emergency transport will likely soon be real, dramatically extending the viability of such organs for later transplant. The discrimination based on one other organ, the brain is staggering. Perhaps the wrong techniques are or were being used in the early 1960's to cryopreserve people, but as our techniques, medicine and other technology advances, it is likely that we will reach a tipping point in future sciences' abilty to revive such far thinking lovers of life.

Answer 2

The honest answer is they wont be. Even with the rapid freezing they use you still end up with the development of ice crystals in some cells which means upon defrost those cells are mush, no longer living viable cells. As Im sure you can imagine it doesn't take much of that sort of thing to result in a corpse rather than a person.

Answer 3

It's really not likely to happen - If (big if!) we could revive a dead person , there will never be a shortage of candidates in "fresh" condition.

It is possible that for historical reasons one might wish to revive a long dead person for interviews, but why not use audio-video records instead?

Warm 'em up, oxygenate and detox the blood and give them the de-fib!
Then cure whatever killed 'em in the first place

Answer 4

Even if you could freeze a body so rapidly that no ice crystals formed in the freezing process, you'd still have trouble during the thawing process. The problem is that, while we know how to freeze things rapidly, we don't (to my knowledge) know how to unfreeze something in a way that avoids the formation of ice crystals.

Answer 5

A bucket of water.


Peace,

Answer 6

sterile operation