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 ....  

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