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血沉即红细胞沉降速率(erythrocyte sedimentation rate,ESR),指红细胞在一定条件下沉降的速度。正常情况下,红细胞膜表面的唾液酸因带有负电荷,使红细胞相互排斥悬浮于血浆中而沉降缓慢,细胞间的距离约为25 nm。当血浆成分或红细胞数量与形态发生变化时,可以影响排斥而改变红细胞沉降速度[1]。健康人血沉很缓慢,一般不超过20 mm/h。但在许多病理情况下,尤其是恶性肿瘤、结缔组织病、结核病、一些严重感染和肾脏疾病等,因机体内环境的改变,可以引起血沉加快。血沉对某一疾病的诊断不具有
Erythrocyte sedimentation rate (erythrocyte sedimentation rate, ESR), refers to the rate of erythrocyte sedimentation under certain conditions. Under normal circumstances, the sialic acid on the surface of erythrocyte membrane is negatively charged, causing erythrocytes to repel each other in the plasma and sedimentation slowly, with a distance of about 25 nm. When the plasma composition or red blood cell number and morphological changes, can affect the rejection and change the rate of erythrocyte sedimentation [1]. Healthy people very slow ESR, usually not more than 20 mm / h. However, in many pathological conditions, especially malignant tumors, connective tissue diseases, tuberculosis, some serious infections and kidney diseases, etc., due to changes in the body environment, can cause ESR faster. ESR does not have a diagnosis of a disease