血象的特点：
Characteristics of the blood elephant:
1.红细胞数和血红蛋白量：出生时红细胞数（5.0～7.0）×1012/L，血红蛋白量150～220g/L，未成熟儿可稍低。生后2～3个月时 红细胞数降至3.0×1012/L，血红蛋白量降至100g/L左右，出现轻度贫血，称为“生理性贫血”。3个月以后，红细胞数和血红蛋白量又缓慢增加。
2.白细胞数与分类： 2. White cell count and classification: （1）白细胞总数：初生时为（15～20）×109/L，然后逐渐下降，1周时平均为12×109/L.婴儿期白细胞数维持在10×109/L左右，8岁以后接近成人水平。医学教育网|搜集整理 (i) Total number of white cells: at birth (15-20) × 109/L, then gradually decreasing, with an average of 12 & times per week; 109/L. Number of white cells in infancy remaining at 10 & times; 109/L, about 8 years of age, approaching adult level. （2）白细胞分类：出生时中性粒细胞约占0.65，淋巴细胞约占0.30；生后4～6天时两者比例约相等；以后淋巴细胞约占0.60，中性粒细胞约占0.35，至4～6岁时两者又相等；7岁后白细胞分类与成人相似。 (2) White cell classification: Middle cell cells are about 0.65 at birth and about 0.30 lymphocytes at birth; the ratio is approximately equal between 4 and 6 days after birth; later lymphocytes are about 0.60, while neutral cell cells are about 0.35 and equal between 4 and 6 years of age; white cell classification after 7 years of age is similar to that of adults. 3.血小板数：血小板数与成人相似，约为（150～250）×109/L. 3. Blood plate numbers: plate numbers are similar to those of adults, approximately (150-250)× 109/L. 4.血红蛋白的种类：胚胎期的血红蛋白为Gower，Gower2和Portland；胎儿期的血红蛋白为HbF；成人血红蛋白，即HbA及HbA2.出生时HbF70%，HbA约占30%，HbA2＜1%.出生后HbF迅速为HbA所代替，1岁时HbF不超过5%，2岁时不超过 2%.成人的Hb绝大部分为HbA，约占95%，HbA2占2%～3%，HbF不超过2%. 5.血容量小儿血容量相对较成人多：新生儿血容量约占体重的10%，平均300ml.儿童约占体重的8%～10%.成人血容量占体重的6%～8%. 5. Blood capacity for infants is higher than for adults: newborn blood capacity is about 10% of body weight, an average of 300 ml. Children are about 8-10% of body weight. Adult blood capacity is 6-8%.
注册有任何问题请添加 微信：MVIP619 拉你进入群
打开微信扫一扫
添加客服
进入交流群
发表评论