Endoscopic double pigtail plastic stent, with formal indication on pancreatic collection, according to the instruction forms of the manufacturer.

Interventions associated:

EUS-guided transmural drainage of pancretic collection: PLASTIC STENT.

Lumen apposing metal stent with formal indicaction on pancreatic collection, according to the manufacturer instruction forms.

Interventions associated:

EUS-guided transmural drainage of pancretic collection: METALLIC STENT.

Endoscopic ultrasound-guided transmural drainage of walled-off pancreatic necrosis:

The pancreatic collection will be located with the linear echoendoscope, and we will proceed to choose an optimal area to perform the puncture guided by EUS; with the absence of intervening vessels.

This collection will be punctured with a 19 G needle or with an electrocautery device directly. Guidance will be advanced through the needle and the ostomy will proceed according to the routine of the experienced endoscopist.

Placement of a plastic double pigtail, 5-10 cm in length, diameters 7-8,5-10 Fr. Minimum one 10 Fr prosthesis.

Arm associated: PLASTIC STENT

Radiological success at 4 weeks after the interventional procedure: reduction size of the wopn at least 50%.

Evaluate the long-term clinical success (4 months) (metallic vs. plastic) determined by the total resolution or <3cm of the WOPN, releated with clinical improvement.

Technical success: Correct release of the prosthesis (plastic or metallic) and drainage of the WOPN.

Duration of the procedure: Minutes