X-Message-Number: 3056 From: Newsgroups: sci.cryonics Subject: Technique Going In Date: Sun, 04 Sep 94 14:02:03 PDT Message-ID: <34d3a2$> I find that the people on this net who are not worried about technique going into cryonic suspension (e.g. just throw the corpus into a vat of liquid nitrogen) are painfully unaware of what happens when fluids and tissues are frozen and thawed and putting too much reliance in future technology (to achieve thawing/ revival) which would have to find a way to reverse immutable laws of physics and that would be impossible regardless of how many billions you throw at the problem. On the other hand by studying how animals such as turtles are able to become frozen and then thawed/revived months later would be instructive in perfecting a technique of going in as well as coming out and billions upon billions would not have to be used. Quite simply put, the body--- housed in a hyperbaric oxygen chamber (they only cost a hundred thousand if that and are reusable in multiple procedures) should have all the blood fluid drained (by the morticians method) and be simultaneously replaced by isotonic solutions containing the same sorts of cryoprotectants found in reptiles (glucose, urea, etc); experiments have already been done on dogs where under hyperbaric conditions all the blood was removed and replaced by Ringer's lactate solution with no adverse effect on tissue oxygenation when the the blood was re-infused and the dogs revived. Thus was is suggested is that the corpus be oxygenated heavily by hyperbaric methods (takes a rleatively short period of time), the blood removed and replaced, reoxygenated or continuous oxygen, then frozen. The PaO2s obtained under conditions of suspended animation would insure against even the most minimal oxidative metabolism needs during cryonic suspension and would protect the subject during the revival process. I have friends who have frozen and thawed successfully a number of animals with this technique. The major problem with achieving successful cryonic suspension and revival is the freezing of the body water. Ice occupies a greater volume than water and ruptures (e.g. destroys) tissue cells; dehydrating the corpus does not necessarily solve the problem since it is impossible to drain a body of body water trapped inside cells. Hence the need for cryoprotectants going in. If some of these postings are April Fools jokes then forgive my serious reply .... Rate This Message: http://www.cryonet.org/cgi-bin/rate.cgi?msg=3056