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Comment by surfpel | Hacker News Reader

Maybe one could build an apparatus made of a bunch of narrow expanding tubes that pierced the organ without really damaging it then carried coolant to freeze the organ quickly. Could heat it back up quickly via frozen-in-place the tubes as well. Wonder if this has been attempted before

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Good news! Your organs are already irrigated by your circulatory system

I thought of this too but the high throughput of fluid to get fast cooling would require a pressure so high it would destroy the organ. Running micro tubes through the capillaries would require significant advances in materials science.

But doesn't the loop-back happens in capillaries - which are biologically mediated?

Totally outside my area of expertise, but I wouldn't expect you can pump cold fluid into arteries and it'll just come gushing out the veins

I found this video https://www.youtube.com/watch?v=6ecmOuCIoNc which makes me thing that pumping cold fluids would work at least a bit.

I would love an answer to this question

What do you reckon, tamper with the existing fluid, maybe add some heat pipes into the existing large passageways? Not sure if they have the right shape for the kind of temperature change being discussed.

Thinking of something like this?

https://www.pfizer.com/news/articles/nature’s-antifreeze-hol...

Yessir!

The other thing would be how to remove this later on and not kill whoever got the transplant with this infusion.

That part I imagine would probably be the easy bit - just wash it out.

Or do you mean the perforated version? I like that idea but needles so small that they don't cause significant damage does seem at cross purposes with heat wicking needles.

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