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Old 26th August 2019, 06:57 AM   #5
bruto
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Join Date: Jun 2005
Location: Way way north of Diddy Wah Diddy
Posts: 26,976
For some time I gave plasma on a regular basis as part of a program for a patient with hemophilia. A patient would have several matched donors, so each would give plasma once a month, and the patient would get plasma once a week. That was a while ago, and it may have changed some, but it was a pretty simple procedure from the donor's point of view. They extract the blood, take the needed plasma, and put the rest back. It's the same with platelets except they take the platelets and give the rest back. The machine used a centrifuge to separate components. I imagine that if the cells required can be readily separated in the machine, they'll send the plasma right back, but otherwise they'll keep the plasma. If you're healthy you have enough. When I went, they had video so I'd get to see a movie, and they'd serve coffee and cookies afterward. They'd throw a little party when one did it 50 times, but alas, I think my patient died or something, and they stopped calling at 49!
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