CONTENT WARNING: Blood
Twice a year, I donate blood with a special procedure called double red blood cell (DRBC) donating. Instead of just hooking my arm vein to a collection bag and letting pressure fill it, a machine withdraws a pint, centrifuges the red cells out, and then pumps the plasma portion back in. It does this twice per donation session, hence the “double” in the procedure. This is favored for blood donors of type O-negative.
I go in for my most recent donation. The phlebologist has a little trouble getting the needle into a vein on my right arm, so she has a supervisor come over and get the needle in correctly. She starts the DRBC machine, directing me to grip a rubber ball every few seconds to keep the blood flowing well.
After about four minutes, the machine starts making a gentle alarm beep. Since the procedure usually takes a half-hour, this is unusual. The phlebologist and her supervisor come over and try to clear the error that the machine has. He tries adjusting the needle in my arm, but that doesn’t stop the error beeps.
They then open the cabinet of the machine and recoil. Apparently, one of the centrifuge tubes has a leak, and for the last few minutes, my blood has just been spraying all over the interior of their machine. They quickly shut down the machine, apologizing that they have to stop the donation and that they can’t restart me elsewhere, because they’re not sure how much has been taken from me.
As I’m prepping to leave, other staff come over and look in the machine and recoil. I guess they’re squeamish if the blood isn’t in the nice clean collection bags.