Technical question regarding hemodialysis

Factual Questions
1

I was looking over my list of threads I started, and came across this one, which, upon inspection, I noticed had never received a response.

The friend in question has pased away in the intervening nearly-5(!) years, but it’s still an interesting question (to which I do not know the answer), and I figured rather than bump it, I’d just ask it again. So here it is, in all its 2003 glory:

*I have a friend who has recently gone on hemodialysis due to diabetes-related kidney failure. I know that in lieu of his kidneys functioning, his blood is being passed through the dialyzer, getting stripped of excess water and waste products, then returned, cleaned up, to his body. What I don’t know is:

what is the approximate volume of blood that is in the dialyzer rather than in his body while the procedure is in full swing?

IOW, should some emergency in the building require that he be immediately removed from the machine, and evacuated, how much of his blood would still be in the machine?*

2

One-time bump.

Please don’t let me wait five more years to ask about it again.

3

I’m sure one of the human experts will be along in a bit, but my WAG is that it isn’t more than 10% of blood volume. That’s the quasi-magic number where you start to feel the effects of having too little blood (in animals anyhow, maybe humans are more sensitive).

100 kg human x 10% = 10 liters blood in the body total
10 liters x 10% = 1 liter blood.

Less than a liter in the machine at any one time.

Pullet has spoken.
Clucked?

4

Thank you so much. A WAG is better than nothing; well, as long as the question is entirely academic.