下肢血管性疾病直接影响局部微循环变化。本文采用观察(足母)趾甲襞微循环的方法观察了16例下肢深静脉血栓形成,13例血栓闭塞性脉管炎患者,进行了趾与指的对比,并与10名正常人进行比较。发现下肢深静脉血栓形成后趾甲襞的主要改变为管袢极度扩张,数量相对减少管径最粗可达25～30μm,形态极不规则,但渗出较轻, Lower extremity vascular diseases directly affect the local changes in microcirculation. In this paper, 16 cases of deep venous thrombosis of the lower extremities and 13 cases of thromboangiitis obliterans were observed by observing the microcirculation of the toenail 足 foot. The comparison of toes and fingers was performed and compared with 10 normal subjects. It was found that the main change of nails after deep venous thrombosis of lower extremity was hyperbaric tube dilatation, the relative reduction of the number of the largest diameter of up to 25 ~ 30μm, very irregular morphology, but less exudation,