Inclusion Criteria: -~Symptomatic Walled-off pancreatic necrosis (WON)~Eligible for EUS guided BFMS placement~Signed informed consent .~Age >18 Years~Exclusion Criteria: -~Types of pancreatic collections other than WON .~Drainage with stents other than BFMS~Previous attempts at drainage of WON~Coagulopathy (INR>1.5) or thrombocytopenia(plc <50000/cmm)- not correctable.~Pregnancy~Not willing to give informed consent
Endoscopic ultrasound guided drainage of WON with metal stent is the mainstay of WON management.~But there are few complications related to BFMS , like bleeding due to vessel erosion, stent clogging , stent migration .~This study is to assess, whether placing an anchoring DPS through the BFMS will decrease adverse events or not.~There are only 2 retrospective studies till date ,comparing LAMS with coaxial stent vs LAMS alone.~one study showed no significant decrease in adverse events , one study showed decrease in adverse events when DPS with LAMS .~But there has been no prospective RCT to assess the utility of DPS to date