Aortic Valve Blood Transfusion Question About Aortic Valve Replacement Surgery?

Question about Aortic Valve Replacement Surgery? - aortic valve blood transfusion

My father had surgery for aortic valve replacement (fabric) on Thursday. A family member said a nurse friend suggested giving the family's blood, if you need a blood transfusion. He said that nurse was surprised that the doctor did not mention this to me or my father, after we saw last Friday with the results of angiography. The family members usually donate blood in case of this kind of operation? Blood transfusion is a safe bet that the nurse did not even mention it? My father was not a rare blood type. It's not too late for a given operation is Thursday, and the blood that is given, it must be selective?