There are several synonyms for the phrase "direct transfusion". One of the most commonly used synonyms is "blood transfusions". However, this phrase is often used to describe the process of receiving blood from a donor directly into the recipient's bloodstream. Other synonyms for direct transfusion include "transfusion therapy", "transfusion medicine", and "hemotherapy". In general, these terms are used to describe the use of blood products such as red blood cells, plasma, and platelets to treat various medical conditions and injuries. While direct transfusions are typically considered safe and effective, they do carry some risk of infection and other complications, which must be carefully managed by healthcare providers.