This Guideline has been updated to reflect the newest developments in patient care during the perioperative period. Its pages cover general concepts of 1) advantages and disadvantages of perioperative transfusion, 2) the indications and contraindications for intraoperative and postoperative recovery and reinfusion, 3) the possible complications, and 4) administrative aspects that are often overlooked. Yet, it also digs into more detail for example, exploring washing vs nonwashing of reinfused blood and the use of partially filled bowls