自Ｆｒｉｍｂｅｒｇｅｒ[1]首次报道采用金属内支架治疗食管狭窄获得成功以来,有关食管内支架置入术的报道日渐增多,置入的器械和技术亦更趋完善[2～4]。为了在释放食管内支架时能更迅速、更精确地定位,以进一步提高其一次性置放成功的准确率,笔者采用一种自制的Ｘ线显影尺(Ｘ Since Frimberger [1] first reported the success of esophageal stenosis with metal stents, there has been a growing number of reports of esophageal stent placement and more sophisticated instruments and techniques [2-4]. In order to release the esophageal stent can be more quickly and accurately positioned to further improve the accuracy of its one-time placement success, I used a self-made X-ray ruler (X