In recent years,there are many extensive and penetrating studies to prolong drainage time by research the pathogenesy of stent blockage.This article makes a summary on its research progress.

• 近年来,国内外在探讨支架阻塞的机制,通过多种方法防治以延长引流时间等方面进行了广泛而深入的研究,此文就此作一综述。