对于双侧骼外静脉上段狭窄或阻塞的病人，我们采用两侧髂外静脉插管、使用自制可调式三通连接管（附图）进行同时等量注药同步造影的方法。这样既同时获得利于诊断的显示两侧血管病变的造影片，又避免了分两次往药造影对病人的X附图可调式工通连接管①塑料三通开关②已缩短的连 For patients with bilateral upper stenosis or obstruction of the external iliac vein, we used a bilateral external iliac vein cannula and a self-made adjustable three-way connecting tube (with photos) to perform simultaneous equivalence injection. In this way, both the diagnostically advantageous angiograms showing both sides of the vascular lesions are simultaneously obtained, and the X-rays of the patient’s X-adjustable work-piece connecting tube 1 and the plastic three-way switch 2 are shortened.