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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
interestingly a possible modification already exists to allow diving to 5K feet, the Libelle G-suit intended to be filled with water in order to allow 10G acceleration without as many problems.
I don't know exactly how far along the research is, but it seems that filling the suit with liquid and then using a combination of ultrasonic travelling waves (same idea as high frequency ventilation) and very powerful pumps it might be possible to build a suit capable of allowing diving to extreme depths.
Interestingly the main problem (icky though it sounds) might be gas bubbles in the intestine, which would potentially "leak" into the bloodstream and cause a fatal embolism on returning to the surface. the solution here would require flushing the intestine with a compound to eliminate gas then filling with a non toxic isotonic neutral liquid with density similar to the body tissues. A dilute solution of saline would probably do it, with added nutrients, sugars and drugs to slow intestinal transit and prevent gas formation for obvious reasons..
This also opens the possibility of using some chemistry to reduce blood CO2 levels by allowing it to diffuse into the liquid (maybe use something like lime water?) that could allow a few hours of useful work before having to return to the surface. same principle as peritoneal dialysis but using the intestine as the exchange surface. Comments? -A
Registered Member #902
Joined: Sun Jul 15 2007, 08:17PM
Location: North Texas
Posts: 1040
as a Scuba diver I find this particularly interesting. The main concern I see is that the entire system would have to have precision gas and pressure control. When the "liquid air" is inside the body, does it not release the oxygen so the human body may use it normally? - if this is the case, then the problem arises that when the oxygen is released from chemical bonding it will become normal oxygen and therefore it too can have a similar problem of "the bends" at such extreme pressures. Or, if not the case, there is still another problem. The human body, contrary to intuition, can in fact be poisoned by Oxygen! - if air had a slightly higher concentration of O2 than it does now, we would not survive (excluding possible evolution allowing adaption). that is why nitrogen, or helium for deep dives, is still left in the mix. Even hospitals with pure oxygen only can give it safely because it is under monitoring and usually there is some normal air that leaks in or the body needs it more than it can hurt it (at least according to the health class I received). However, in this type of scenario it is a potential problem because there is no other source of air.
just a couple of thoughts that occurred to me after seeing this. There could be solutions, but I do not know of them. I'm sure this technology has the potential, but it still is too early to tell what it is technically possible to use it for versus what it is safe to use it for.
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Liquid breathing for deep sea divers?
