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_ShadowFyre_ t1_j134qhq wrote

Reply to comment by Molkin in Could being submersed in a sealed tank of fluid help humans survive heavy G acceleration in outer space? by cheeze_whiz_shampoo

I think the primary issue with this (using my limited internet knowledge) is that most cardiopulmonary bypass leads to hemolysis, which kinda defeats the purpose of CPB. Additionally, there’s the issue of how to distribute the bypassed blood. To effectively reintegrate the blood, you’d either have to have an open “wound” in the chest or permanently installed synthetic transplants, both of which have their own issues. Additionally, you’d probably need anesthesia regardless of the method, which then relegates the point of doing all this as you’d need a functioning being not under the effects of the liquid/bypass to manage the anesthesia.

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Blakut t1_j13fdyr wrote

you can put oxygen in your digestive system and breathe through the butt using the intestine wall which is heavily vascularized for oxygen exchange.

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jhudsonj t1_j14neku wrote

First, one of the big difficulties with using a fluid medium to "breath" is that the muscular effort to move it is exhausting...The mice that they left in there for too long (more than a few minutes) died from that alone.

Second, the big problem with using Bypass or ECMO is that it requires anticoagulation...So, we're going to inject you with heparin, so you can't make a clot on a dare, and then shoot you into space! I don't see that ending well!

I should add that those are both problems that can be potentially solved. But they will require fairly big advances to pull them off.

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