Since it's never been that relevant to me, I've only vaguely paid attention to DRC apheresis, which involves taking your blood out through a vein the same way they usually do, but then running it through a machine, stripping out the red blood cells, and then putting most of the fluid (plus a little saline) back in through the same vein. They do it in two stages, removing and returning one unit's worth, then the second.
It feels weird. Not the blood removal, but putting fluid back. I definitely felt flushed and a little lightheaded while that was happening, but that faded quickly. Then, of course, I got to enjoy it again. After the few minutes while the phlebotomist finished up and put the stretchy bandage stuff on my arm, I felt OK -- just a touch lightheaded as I meandered over to the canteen area.
The nice thing about giving blood at the Tabernacle Baptist Church is that they have loads of fresh baked goods, not just the usual bags of pretzels and pre-packaged cookies and Fig Newtons. I had a fresh brownie and an almond bar with my teeny can of cranberry juice before heading over to the Lincoln Street Diner for my usual post-blood-donation lunch. I was cold when I got there, but the tomato florentine soup and chicken and biscuits cured that!
I'm thinking I will stick to regular blood donations from here on out. It means I can donate more often (they tout the less-often donation as a benefit to donors of the DRC) and don't usually feel quite as oogy. Another drawback to the DRC? I don't get the instant one-pound weight loss. ;-)