Hi, Aaron.
Welcome to Marrowforums. Marlene has given you a lot of good information.
On the practical side, since your Dad is not getting a bump up in his counts from the transfusions, you should be checking that he's getting the freshest blood available. That is, you don't want him being transfused with units that are about to expire. There is some controversy about whether the expiration date on a unit of blood has any affect on the patient, but those who have had lots of transfusions will tell you there most definitely is. You can read about this in the
Expiration date on blood for transfusion thread.
Regards,
Ruth