Pigs and rodents are able to use their intestines for respiration.
Rodents and pigs share with certain aquatic organisms the ability to use their intestines for respiration, finds a study publishing May 14th in the journal Med. The researchers demonstrated that the delivery of oxygen gas or oxygenated liquid through the rectum provided vital rescue to two mammalian models of respiratory failure.
If I ever run across a drowned pig that needs resuscitating, I’m not volunteering.
Not just pigs and rodents. The end of the article talks about scaling up for human use…
All this is really saying is that if you put small molecules like oxygen on one side of a selectively-permeable membrane, they’ll permeate to the other side. But you’d nee an awfully high concentration to make it significant, given that the intestines have much less surface area than the lungs.
Someone’s always gotta pooh-pooh on theinteresting ideas.
Well, that just sucks ass.
@needscoffee, nice thread title! 
Still not volunteering to resuscitate…
The actual paper: https://doi.org/10.1016/j.medj.2021.04.004
With associated commentary: https://doi.org/10.1016/j.medj.2021.04.005
The graphical abstract is glorious:
https://marlin-prod.literatumonline.com/cms/attachment/4fe6dbb3-14e1-4fc1-bbfc-c3985e088431/fx1.jpg
I did not know that’s what @Loach looked like.
Even with a handy bicycle pump?
Occasionally I did suspect he was breathing through his ass. 
Just kidding @Loach, you a’ight in my book.
It is!
(That’s either one small pig, or some scarily large rodents.)
This is so many kinds of not my field, but I understand laboratory pigs are often bred small. Even then, that’s some hefty rodents.
Likely doesn’t even need a specialized adaptor nozzle.
There’s a typo in your title; it’s not ‘Babe’, it should be Bob.
^^Nice ass reference!