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放射线幅射可引起与剂量成正相关的骨髓功能抑制,粒细胞和血小板相应减少。照射量1～2Gy 时骨髓抑制较轻,自身恢复是可能的。剂量2～5Gy时骨髓抑制比较严重,有恢复的可能,但感染和出血常见,且可能致死。剂量超过5Gy 引起严重骨髓抑制,一些患者能恢复,但可能死于感染或出血。剂量超过15Gy,引起死亡的原因不是骨髓抑制,而是脏器如胃肠道、肺、中枢神经系统损害。
Radiation exposure can cause bone marrow suppression, which is positively correlated with dose, with a corresponding decrease in granulocytes and platelets. Exposure to 1 ~ 2Gy bone marrow suppression lighter, self-recovery is possible. Myelosuppression is more severe at doses of 2 to 5 Gy, and recovery is possible, but infections and hemorrhages are common and may kill. A dose of more than 5 Gy causes severe myelosuppression and some patients recover but may die of infection or bleeding. The dose exceeds 15 Gy, the cause of death is not bone marrow suppression, but organs such as gastrointestinal tract, lung, central nervous system damage.