脉管炎概述Summarize overview of vasculitis

脉管炎全称为血栓闭塞性脉管炎（TAO），是一种较顽固的外血管疾病，好发于四肢中小动脉(同时累及静脉及神经)，是一种持续性、进行性的慢性血管闭塞性疾病，伴有变态反应性、无菌性炎症，被侵犯的血管呈节段性狭窄、闭塞，形成血栓阻塞，引起肢体血液循环障碍，局部组织缺血缺氧，发生溃烂、坏死。广义的脉管炎包括深静脉炎、浅静脉炎、大动脉炎、浅动脉炎、毛细血管炎、淋巴管炎、糖尿病足、静脉曲张、静脉瓣膜功能不全、动脉硬化（AS）、雷诺氏症等。狭义的脉管炎指的是四肢远端中小动静脉节段性、炎症性、血栓性的狭窄或闭塞，引起缺血、剧痛、间歇性跛行，严重者有肢端溃疡和坏死。通常所指脉管炎均是广义脉管炎。广义脉管炎在我国发病率较高，且呈不断增长趋势。

Vasculitis,full name is thrombosis angiitis obliterans (TAO),is a relatively stubborn peripheral vascular disease,which occurs in small arteries in the limbs (simultaneously involving veins and nerves),and is a
persistent,progressive chronic vascular occlusive disease, accompanied by allergic reaction,aseptic inflammation,the invaded blood vessels are segmental stenosis,occlusion,form
thrombosis,causing limb blood circulation disorders,local tissue ischemia,hypoxia,ulceration,necrosis.Broadly
speaking,vasculitis includes deep phlebitis,superficial phlebitis,takayasu arteritis,superficial arteritis,lymphangitis, trichodangiitis,diabetic
foot,varicosity,venous valve insufficiency,arteriosclerosis,Raynaud^,s syndrome,Behcet^,s disease,old rotten leg,erysipelas,etc.
Narrow vasculitis refers to small and medium-sized arteries and veins at the far end of the limbs,segmental inflammatory thrombotic stenosis and occlusion,causing
ischemia,severe pain,intermittent claudication,in severe cases limb ulcers and necrosis.Generally,the vasculitis is broad vasculitis.The incidence of vasculitis in general is high in our country, and it is growing.