The combining form "-logous" means having a relationship as specified in the prefix. In the case of an autologous blood transfusion, it means the person is receiving:
- The patient's own blood, previously donated
Explanation:
1. "Auto-" as a prefix means self or one's own.
2. In an autologous blood transfusion, the patient receives their own blood, which was donated by them prior to the transfusion.
3. This type of transfusion reduces the risk of rejection or transfusion reactions since the blood being transfused is from the same individual.