应用套管针行经皮穿刺引流,以往常用的套管针有腹腔穿刺套管针和胸腔穿刺套管针。这些套管针多为一针一芯,穿刺时对组织的损伤相对较大,且容易造成出血。所置引流管往往受到套管针口径的限制,使用起来深感不便。1983年以来,我们吸取肾穿刺道扩张用的同轴扩张器的优点,将穿刺针与扩张器结合为 The application of trocar percutaneous drainage, the usual trocar with celiac puncture and thoracentesis trocar. These trocar needle and a needle for the most puncture when the tissue damage is relatively large, and easily lead to bleeding. The placement of the drainage tube is often limited by the caliber of the trocar, which is inconvenient to use. Since 1983, we have learned the advantages of a coaxial dilator for the expansion of the renal puncture canal, combining a puncture needle with a dilator