Background and aims Shielding methods for post-endoscopic submucosal dissection (ESD)
ulcers have delivery-related problems. We developed an enveloped device for this purpose and evaluated its usefulness. Materials and methods Polyglycolic
acid (
PGA) sheets were delivered to six 3.0-cm
ulcers in two resected porcine stomachs and six 5.0-cm
ulcers in another three stomachs. In the regular method group, small
PGA sheets were delivered via
forceps. In the novel method group, a large
PGA sheet was delivered via the new device. The methods were compared in terms of time, and macroscopic and histological findings of the
ulcer floor. Results The median time required to cover a 3.0-cm
ulcer was 0.39 min/cm2 in the novel method group and 1.03 min/cm2 in the regular method group (P = 0.03), and to cover a 5.0-cm
ulcer was 0.38 min/cm2 and 0.85 min/cm2, respectively (P = 0.03). In the novel method group, the
PGA sheets were in close contact, fully covering the
ulcer floor. In the regular method group, the sheets were partly elevated from the
ulcer floor. Conclusions This novel technique seems promising in this preliminary study.