Guidelines For Clinical Practice
Copyright ©2010 Baishideng.
World J Gastrointest Endosc. Feb 16, 2010; 2(2): 50-53
Published online Feb 16, 2010. doi: 10.4253/wjge.v2.i2.50
Table 1 Specification of transnasal endoscopes
Direction of viewForward-viewingForward-viewingForward-viewing
Angle of view120˚120˚140˚
Outer diameter (mm)
Distal end55.95.5
Insertion end5.55.95.1
Bending section
Working length (mm)110011001050
Total length (mm)142014001360
Working chnnel diameter (mm)222
Table 2 Advantage and drawbacks of transnasal endoscopic biliary drainage
Fewer deleterious hemodynamic effectsLow success rate of selective cannulation
Possible procedure without conscious sedationLimited devices
Possible one-step placement of naso-bliary tubeLimited procedures
Possible procedure in the bedsideImpossible transnasal insertion