On the indication of platelet transfusions in aplastic anemia patients.

Studies were made on platelet (PLT) counts in aplastic anemia patients with respect to the necessity of PLT transfusions. The conclusions obtained were as follows.1) PLT transfusion is not necessary when PLT counts are always above 10, 000/μl and bleeding tendency is mild.2) When PLT counts fall frequently below 10, 000/μl but the median is above it and bleeding tendency is mild, PLT transfusion is usually not necessary.3) Even if median PLT count is slightly less than 10, 000/μl, PLT transfusion is probably unnecesary in chronic cases.4) PLT transfusion is necessary when bleeding tendency is strong irrespectie of PLT counts.