Apheresis used in a sentence

Apheresis in a sentence as a noun

Then, through a process called apheresis, a donor's blood is removed through a needle in one arm and passed through a machine that separates out the blood-forming cells.

In my case, I was hooked up to an apheresis machine for a few hours, and it basically pumped blood out of one arm, and then pumped back the blood minus stem cells into the other arm.

I'd think if they were worried about scale accuracy or clothing weight, the same safety margin would apply to all donation types -- or at least all apheresis donations.