Ultrathin endoscope flexibility can predict discomfort associated with unsedated transnasal esophagogastroduodenoscopy.


AIM To evaluate the effects of choice of insertion route and ultrathin endoscope types. METHODS This prospective study (January-June 2012) included 882 consecutive patients who underwent annual health checkups. Transnasal esophagogastroduodenoscopy (EGD) was performed in 503 patients and transoral EGD in 235 patients using six types of ultrathin endoscopes. Patients were given a choice of insertion route, either transoral or transnasal, prior to EGD examination. For transoral insertion, the endoscope was equipped with a thin-type mouthpiece and tongue depressor. Conscious sedation was not used for any patient. EGD-associated discomfort was assessed using a visual analog scale (VAS; no discomfort 0- maximum discomfort 10). RESULTS Rates of preference for transnasal insertion were significantly higher in male (male/female 299/204 vs 118/117) and younger patients (56.8 ± 11.2 years vs 61.3 ± 13.0 years), although no significant difference was found in VAS scores between transoral and transnasal insertion (3.9 ± 2.3 vs 4.1 ± 2.5). Multivariate analysis revealed that gender, age, operator, and endoscope were independent significant predictors of VAS for transnasal insertion, although gender, age, and endoscope were those for transoral insertion. Further analysis revealed only the endoscopic flexibility index (EFI) as an independent significant predictor of VAS for transnasal insertion. Both EFI and tip diameter were independent significant predictors of VAS for transoral insertion. CONCLUSION Flexibility of ultrathin endoscopes can be a predictor of EGD-associated discomfort, especially in transnasal insertion.

DOI: 10.4253/wjge.v5.i7.346


Citations per Year

89 Citations

Semantic Scholar estimates that this publication has 89 citations based on the available data.

See our FAQ for additional information.

Cite this paper

@article{Ono2013UltrathinEF, title={Ultrathin endoscope flexibility can predict discomfort associated with unsedated transnasal esophagogastroduodenoscopy.}, author={Satoshi Ono and Keiko Niimi and Mitsuhiro Fujishiro and Tomoko Nakao and K. Suzuki and Yumiko Ohike and Shinya Kodashima and Nobutake Yamamichi and Tsutomu Yamazaki and Kazuhiko Koike}, journal={World journal of gastrointestinal endoscopy}, year={2013}, volume={5 7}, pages={346-51} }