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The bags contain a specific amount of anticoagulant and require 450ml blood. There's about 90ml blood per kg body weight, so a 50kg person has 4500ml. It's sa
by projektfu 9y ago
The bags contain a specific amount of anticoagulant and require 450ml blood. There's about 90ml blood per kg body weight, so a 50kg person has 4500ml. It's safe to donate 10%. The cutoff in the US is actually 110lbs (50kg).
- ken 9y agoThe exact weight requirement varies. At my blood center, for the kind of donations I do, it's actually 114 lbs, for some reason.
- jdietrich 9y agoI'd guess that the extra 4lbs is a safety margin for scale accuracy and the weight of clothing.
- ken 9y agoI'm not sure. Curiously, some types of donation (whole, and double-red apheresis) have a minimum of 110 pounds here, while others (apheresis platelets, plasma) have a minimum of 114 pounds. 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.