急性白血病患者多伴有出血倾向 ,在诱导化疗期间更是如此 ,是化疗失败和早期死亡的重要原因之一。其并发出血与患者的血小板计数 (ＢＰＣ)下降密切相关。现已把初诊时ＢＰＣ 15× 10 9/Ｌ作为急性白血病预后不良的指标之一。经诱导化疗后ＢＰＣ进一步下降 ,但在完全缓解前多有 Patients with acute leukemia are often associated with bleeding tendency, especially during induction chemotherapy, chemotherapy failure and early death is one of the important reasons. Its concurrent bleeding is closely related to the decline of patients’ platelet count (BPC). BPC now has 15 × 10 9 / L first visit as one of the indicators of poor prognosis of acute leukemia. After induction of chemotherapy BPC further decline, but before complete remission