Table 4: Comparison of endoscopes.

 Working length (mm)Channel diameter (mm)VisibilityElevator

Side (posterior oblique)-viewingJF260V, Olympus12403.7poor+

Forward-viewingGIF Q260, Olympus10302.8good
DBE: EC450-BI5, FUJIFILM15202.8good
SBE: SIF Q260, Olympus20002.8good

Anterior oblique-viewingXK200, Olympus10302.8good+