Lumen Apposing Metal Stents vs Double Pigtail Stents

Summary

While the majority of patients with acute pancreatitis suffer a mild and uncomplicated course of disease, up to 20% develop a more severe course with development of pancreatic and/or peripancreatic necroses. With time, these necroses become encapsulated with a well-defined inflammatory wall, so called walled-off necroses (WON). Up to 30% of WONs become infected, which prolongs the length of hospital stay, increases morbidity and mortality significantly, and generally requires an invasive intervention. During the last decade, minimally invasive therapies consisting of percutaneous and endoscopic, transluminal drainage followed, if necessary, by percutaneous or endoscopic necrosectomy, have replaced open surgery as the standard treatment resulting in better patient outcomes. The investigators have for nearly two decades been practicing an endoscopic step-up approach as standard treatment for infected WON.

Recently, lumen apposing metal stents (LAMS) have been introduced for the treatment of pancreatic fluid collections. The stent is fully-covered and shaped with two bilateral anchor flanges with a saddle in between. A dedicated through-the-scope delivery system, where the tip serves as an electro cautery device enables extra-luminal access and deployment of the stent. Initial results from primarily retrospective case series were promising. However, a recent randomized controlled trial failed to demonstrate superiority in terms of number of necrosectomies needed, treatment success, clinical adverse events, readmissions, length of hospital stay (LOS), and overall treatment costs. Furthermore, a number of serious adverse events with development of pseudoaneurisms probably due to collapse of the cavity have led to alterations in treatment with sequential computed tomography (CT) scans and insertion of double pigtail stents within the metal stent. In that trial, the mean diameter of the treated necroses was limited and in addition, the study was launched before the introduction of a novel 20 mm in diameter LAMS. The investigators hypothesize, that use of a 20 mm LAMS in large caliber WON is superior to the standard double pigtail technique.

Aim To compare the use of a novel 20 mm lumen apposing metal stent (LAMS) (Hot Axios, Boston Scientific) with a conventional double pigtail technique for endoscopic transluminal drainage of large (\> 15 cm) pancreatic and/or peripancreatic walled-of necrosis (WON).

Conditions

• Pancreatitis,Acute Necrotizing

Interventions

DEVICE

EUS guided transgastric drainage

Whenever possible, randomisation and intervention shall be postponed until 4 weeks after onset of pancreatitis in line with international guidelines. All procedures in this study shall be performed by three experienced endoscopists (PNS, EFH, SN), who all have an extensive experience in endoscopic ultrasound (EUS-) guided drainage of pancreatic collections and the use of self-expanding stents. They have together performed more than 300 endoscopic, transmural drainage and debridement procedures in patients with WON since 2005. Endosonography-guided, transgastric drainage of the WONs shall be performed using a curve-linear echoendoscope (endoscope: Olympus GF-UCT180; ultrasound scanner: Hitachi Arietta 850 or Olympus EU-ME2). All collections shall be treated by single tract transmural cystogastrostomy (single-gate technique). T

Sponsors & Collaborators

• John Gasdal Karstensen

  lead OTHER

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Model

PARALLEL

Eligibility

Min Age

18 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2019-08-29

Primary Completion

2022-05-31

Completion

2022-05-31

FDA Device

Yes

Countries

• Denmark

Study Locations