X-Message-Number: 16588 Date: Tue, 19 Jun 2001 07:18:32 -0400 (EDT) From: Ben Best <> Subject: Re: Ice blockers and CI protocol On Mon, 18 Jun 2001, Charles Platt wrote: > In a previous post I stated that 21CM's ice blocker can be used in > conjunction with "existing protocol." What I should have said is that > the ice blocker can be used in conjunction with the type of conventional > glycerol solution that is used in existing protocol--PROVIDED THAT the > glycerol reaches a high terminal concentration in the perfused tissues. > > Since the terminal concentration reported by Robert Ettinger on Cryonet > some months ago is really quite low, CI would need to upgrade its > perfusion capability before it could profitably add the ice blocker. > This is pretty much what Ben Best said in his post. > > One can reach two conclusions from these statements. Either it's > pointless for CI to experiment with the ice blocker; or CI might consider > improving its perfusion technique to reach a higher terminal concentration, > so that the ice blocker could be used to provide greatly enhanced > protection for its patients. I don't think that it is possible to vitrify cryonics patients with glycerol. Therefore, I think it is not only pointless, but damaging for CI to use ice blockers as long as glycerol is being used. Until a reasonable level of vitrification can be achieved with a superior cryoprotectant cocktail, I recommend against the use of ice blockers by CI. -- Ben -------------------------------------------- Ben Best () http://www.benbest.com/ Rate This Message: http://www.cryonet.org/cgi-bin/rate.cgi?msg=16588