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Endoscopic Ultrasound-guided Drainage of Walled Off Necrosis (WON) (NCT03027895)

The purpose of this study is to compare the effect of lumen-apposing metal stent (LAMS) and tubular metal stent on the drainage of pancreatic pseudocyst, mainly to observe the complication rate after treatment.
  • Device: Endoscopic Ultrasound-guided Drainage Lumen-apposing metal stent
    Endoscopic Ultrasound-guided Drainage of WON with metal stent
    • Device: Endoscopic Ultrasound-guided Drainage Tubular metal stent
      Ages eligible for Study
      18 Years to 80 Years
      Genders eligible for Study
      Accepts Healthy Volunteers
      Inclusion Criteria:
      • Subject with ages from 18-80 years old
      • Subject with pancreatic pseudocysts confirmed by CT
      • Subject with a history of MSAP or SAP, the pseudocysts were formed more than 3 months
      • The size of pseudocyst is more than 6 cm, and the cyst adjacent to the gastric wall
      • Subject has the symptoms related with the pseudocyst
      • The consent form has been signed
      Exclusion Criteria:
      • Subject is younger than 18 years or older than 80 years
      • Pancreatic pseudocyst communicate with the main pancreatic duct
      • Subject can't accept the endoscopic procedure
      • Pancreatic pseudocyst with infection or subject diagnosed with pancreatic abscess
      • The distance between gastric and the wall of the pseudocyst is more than 1 cm
      • Subject with 2 or more than 2 cysts
      • Subject has blood coagulation dysfunction
      • Pregnant or subject has mental disorders
      Patient with WON would be treated randomized with lumen-apposing metal stent (LAMS) or tubular metal stent under the guidance of Endoscopic Ultrasonography. The investigators compare the effect of the two stents, including complication rate, technical success, clinical success and so on.
      31 December, 2016
      19 January, 2017
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