Self-donating blood in anticipation of major surgery is not uncommon. However, my surgeon - who is very conservative - never even mentioned it. So, I did not self-donate blood. Fortunately, I did not have a need for it, during or after the surgery. I believe this is something specific to individual surgeons and hospital rules. If your surgeon or the hospital want you to self-donate a pint of blood, they'll likely tell you. If they don't, it's not considered necessary, unless you have a personal desire to donate your blood as a precaution. Ask your doctor.