Abstract: This document provides methods and materials for performing percutaneous endoscopic therapy (e.g., percutaneous assisted transprosthetic endoscopic therapy). For example, access devices (e.g., inflatable access devices) for performing percutaneous endoscopic therapy are provided.

Abstract: Stents that have non-circular cross-sectional profiles and systems for delivering the stents are described herein.

Abstract: Endoscopic approach necrosectomy assist devices and methods of use to collect necrotic pancreatic tissue. One embodiment of the device includes a body, an expandable cap on a distal end of the body, an actuating mechanism for causing the cap to move between a reduced diameter retracted state and an expanded diameter operational state, a tissue collecting band on the cap, and a band actuating mechanism. Another embodiment of the invention includes a handle and a scoop on the handle. The scoop is movable between a reduced diameter retracted state and an expanded diameter operational state. The scoop is formed from a shape memory material and is self biased to the operational state. Blades, rake tips, cutters or abrasive can be included on the scoop.