X-Message-Number: 6587 Date: Mon, 22 Jul 1996 23:56:41 -0400 From: "Keith F. Lynch" <> Subject: SCI.CRYONICS Re: Q re Prometheus In cryomsg #6570, (Brian Wowk) wrote: > A major thrust of the project will be development of methods > for in-situ cryopreservation of the brain-- deep cooling the brain > of large mammals while leaving the rest of the body warm enough to > avoid damage. This is the main reason I haven't made any pledge yet. * How do you cool a brain embedded in a warm body? Sure you can use perfusion, but only until the perfusate becomes too cold and viscous to flow. * How do you keep the vitrified brain cold when it's embedded in a warm body? * How do you keep the parts of the body adjacent to the vitrified brain from freezing? * How do you rapidly rewarm the brain without roasting the rest of the animal? I will make a pledge when I get a believable answer to each of these questions. Or when I hear of some plausible method of testing viability which doesn't involve a vitrified brain in a warm body. -- Keith Lynch, http://www.access.digex.net/~kfl/ Rate This Message: http://www.cryonet.org/cgi-bin/rate.cgi?msg=6587