Abstract
Objectives
After resecting colonic polyps, retrieval through the scope channel may lead to polyp
fragmentation, making pathologic evaluation challenging. An easy and reliable method
for complete polyp retrieval is needed.
Methods
We developed the water-slider method (WSM), in which the resected polyp is surrounded
by water from an auxiliary water channel during suctioning. We prospectively randomized
patients who underwent endoscopic resection for colonic polyps in our institute into
WSM and non-WSM groups, and evaluated the polyp fragmentation rate.
Results
Analysis of the data regarding small polyps (≤10 mm in size) revealed that the WSM
group had a significantly lower polyp fragmentation rate (8.2%) than the non-WSM group
(23.8%, p < 0.001). Polyp retrieval time did not differ significantly between groups. The rate
of a clear-cut end on neoplastic polyps was significantly higher in the WSM group
(63.8%) than in the non-WSM group (50.0%; p = 0.029).
Conclusions
The WSM achieved a significantly lower polyp fragmentation rate, allowing for more
accurate histologic evaluation than the conventional method. The WSM did not influence
the polyp retrieval time.
Keywords
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Article info
Publication history
Published online: January 18, 2021
Accepted:
December 17,
2020
Received:
August 9,
2020
Identification
Copyright
© 2020 Editrice Gastroenterologica Italiana S.r.l. Published by Elsevier Ltd. All rights reserved.
