X-Message-Number: 3116
Subject: CRYONICS:Dave Pizer misunderstanding
From:  (Charles Platt)
Date: Sun, 11 Sep 94 22:19:04 EDT

Dave Pizer writes:
 
> Charles wanted to know if I had "evidence" concerning my 
> statements that tissue/cells change (or damage is done to 
> them) after they drop below the freezing point. Then Charles 
> further said "I really don't think anyone can be certain 
> about this."  Is there some doubt that FREEZING causes damage 
> and changes to the cells? 
 
Well of course not, Dave, but you have evidently forgotten 
what you previously said--even though I did quote it. Here is 
your text once again: 
 
> In other words, there are a lot more changes in one's brain AFTER
> the temperature drops below the freezing point then before. 
 
The key word here is "more." You say there are a lot *more* 
changes. But this rather depends on factors such as warm 
ischemic time or methods of perfusion. We really don't know 
how much damage is inflicted at each stage of the process. 
Therefore, it is not *necessarily* true to say that *more* 
damage is done after freezing than before. 

#####################################################################
Charles Platt  /  1133 Broadway (room 1214)  /  New York  /  NY 10010 
               / phone  212 929 3983

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