[Clinical usefulness and limits of type & screen system].
Type & Screen (T & S) is a blood transfusion system devised, with the aims of reducing medical expenses, making effective use of blood preparations for surgery and saving labor in blood examination work. For T & S to be used, the technical support of a blood test technologist is required. The staff of transfusion services should make arrangements with anesthetists and surgeons to obtain a good understanding of T & S. The blood transfusion rate and the amount of blood prepared for patients should be reviewed periodically.