If you’ve got a tube up your arse so you can breathe through your bowels, you’ve got bigger issues than microbiome ones. Even not needing that but being sick en

If you’ve got a tube up your arse so you can breathe through your bowels, you’ve got bigger issues than microbiome ones. Even not needing that but being sick enough they’re considering that (if it was ever adopted) you’re going to have problems / you’re probably on wild cocktails of drugs. It is very unlikely much if any of the tested fluids were reaching the small bowel - between the small and large bowels (you probably know this) you have the iliocaecal valve (which can reflux) but the change in diameter means that even if it was incompetent moving any sort of volume would need a cannulation of that valve