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早产儿贫血的特点调节骨髓红系造血功能的促红细胞生成素(Epo)是胎儿自身合成的。在缺氧的宫内环境中胎儿的Epo水平较小儿或成人明显增高;出生后建立了肺呼吸,Epo迅速下降,骨髓造血功能暂时受到抑制。新生儿生后头2～3月,血红蛋白(Hb)呈进行性下降,可降至11g/dl;早产儿Hb下降的时间(生后1～3月)比足月儿提前,下降的幅度更大,常可低至7～8g/dl。许多新生儿可以耐受低水平的Hb而无临床症状,故称“生理性贫血”(早期贫血),其Hb
Characteristics of Anemia in Premature Infants Erythropoietin (Epo), which regulates hematopoietic function of myeloid erythroid, is synthesized by the fetus itself. In hypoxic intrauterine environment fetus Epo levels were significantly higher in children or adults; after birth, lung respiration was established, Epo decreased rapidly, bone marrow hematopoietic function was temporarily inhibited. Newborns in the first 2 to 3 months after birth, hemoglobin (Hb) showed a progressive decline, can be reduced to 11g / dl; premature children Hb decline (postnatal 1-3 months) than full-term children in advance, a greater decline , Often as low as 7 ~ 8g / dl. Many newborns can tolerate low levels of Hb without clinical symptoms, so called “physiological anemia” (early anemia), the Hb