I'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)

I'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.