以自身对比方法观察急性白血病化疗后骨髓衰竭患者输注脐血和外周血后，骨髓粒、单细胞系集落形成单位（ＣＦＵ－ＧＭ）、血浆集落刺激活性（ＣＳＡ）、爆式集落刺激活性（ＢＰＡ）及外周血白细胞计数（ＷＢＣ）的变化。结果脐血输注后可使患者ＣＦＵ－ＧＭ体外培养显著提高，ＣＳＡ、ＢＰＡ水平显著下降并趋于正常，可在输血量减少情况下，使ＷＢＣ显著增高。 Observe the bone marrow granulocyte, single cell colony forming unit (CFU-GM), plasma colony stimulating activity (CSA), and blast colony stimulating activity after infusion of umbilical cord blood and peripheral blood in patients with bone marrow failure after acute leukemia chemotherapy. BPA) and peripheral blood white cell count (WBC) changes. Results After infusion of cord blood, the CFU-GM of patients could significantly increase in vitro culture, and the levels of CSA and BPA decreased significantly and became normal. The WBC could be significantly increased with the decrease of transfusion volume.