摘要AIM Endoscopic ultrasonography (EUS) guided pancreatic pseudocysts drainage is an ideal therapeuticprocedure. We perform it in just one step by using the self-made drainage stent.ETHODS We made an aperture at the tip of the needle outer sheath, and tied the outer sheath with theself-made stent by suture. EUS-guided pancreatic pseudocysts drainage was performed in five patients. Nopatient had visible endosmotic bulge on the gastrointestinal wall. Mean pseudocyst diameter was 4.5 cm(pancreatic head 1, body 2, tail 4). We determined the optimal site for puncture and advanced the needlyand stent into cyst. Taking out the needle made the stent separated from the sheath.RESULTS No hemorrhage happened among these patients. One patient suffering from fever up to 40℃recovered within two days after operation. All the cysts diminished insige after 7 days and resolvedcompletely after 6.8 weeks in average. Cyst resolution was accompanied by symptomatic improvement in allpatients. During a follow-up of 6 months no cyst recurred.CONCLUSION EUS-guided drainage of pseudocysts is a safe and effective procedure, which performs thejust in one process and diminishes the patients' distness.