[Blood type and screen for crossmatch].

To reduce work and effectively use blood for transfusion, a type and screening system (T & S) has been adopted in many hospitals. A questionnaire survey on the system and tests for a transfusion was carried out on our hospital and 381 other hospitals. For 3 years in our hospital, 0.73% of the samples tested revealed the presence of antibodies to red cells which were 30% of the antibodies in Rh system, 30% in Le system, 38% in P1 M and N, and 3% of the other system such as Fyb, Jka and S. Forty percent of the positive samples were subjected to a crossmatch test. The tests were done in a laboratory for serum test in approximately half of the hospitals. A pharmaceutical division controlled the reservation of blood and blood components in 56% of the hospitals. In 45% of the hospitals, a crossmatch test was done using the methods of saline, enzyme treatment and Coombs test. In 10% of the hospitals. Coombs test was used for the test in the transfusion of red cells, platelets, and frozen plasma, and tests were done in 100, 67, and 52% of the hospitals, respectively. When the T & S system is adopted. Staff must have sufficient knowledge on blood transfusion and the system must be efficient to avoid transfusion troubles.