17 February 2018
Int J Med Sci 2013; 10(9):1085-1091. doi:10.7150/ijms.6003
Utility and Stability of Transnasal Endoscopy for Examination of the Pharynx - A Prospective Study and Comparison with Transoral Endoscopy
Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, Chiba, Japan.
Objective: Transnasal endoscopy may be used to observe the head and neck part readily without excessive reflexes. We aimed to evaluate the utility and stability of transnasal esophagogastroduodenoscopy (TN-EGD) in comparison with transoral EGD (TO-EGD) for observation of the pharynx.
Study Design: Prospective study
Methods: A total of 497 patients received unsedated TN-EGD with a 5.5 mm diameter endoscope or unsedated TO-EGD with endoscopes of 6.5 mm, 7.9 mm and 9.2 mm diameter. The rate of completion of pharyngeal observation and numbers of gag reflexes and cough reflexes were recorded.
Results: TN-EGD was performed in 175 patients and TO-EGD was performed in 322 patients. Pharyngeal observation was completed in 173 patients (98.9%) in the TN-EGD group and 235 patients (73.2%) in the TO-EGD group, a significant difference (p<0.001). The TN-EGD group had a low rate of occurrence of gag reflex (0.57%), in contrast, 28.3% of the TO-EGD group had a gag reflex, a significant difference (p<0.01). Multivariable analyses revealed that the use of TN-EGD was the only predictive factor for completion of pharyngeal observation (p<0.0001).
Conclusions: TN-EGD is ideally suited to observation of the pharynx by unsedated EGD.
Keywords: Transnasal EGD, Transoral EGD, Pharynx, Cancer.
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How to cite this article:
Tsuboi M, Arai M, Maruoka D, Matsumura T, Nakagawa T, Katsuno T, Yokosuka O. Utility and Stability of Transnasal Endoscopy for Examination of the Pharynx - A Prospective Study and Comparison with Transoral Endoscopy. Int J Med Sci 2013; 10(9):1085-1091. doi:10.7150/ijms.6003. Available from http://www.medsci.org/v10p1085.htm