Abstract
Transnasal endoscopy involves less pain to the subject than peroral endoscopy with a conventional endoscope and the subject's hemodynamics and oxygen saturation are stable during the examination. This makes the procedure suitable for gastric cancer screening since such screening emphasizes the acceptance and safety of the examination. However, the procedure has several demerits in comparison to endoscopy with a conventional endoscope in that it involves pain in the nasal cavity during insertion and offers poorer image quality and maneuverability. Additionally, its diagnostic accuracy has not been fully assessed. Thus, obtaining appropriate informed consent in accordance with conditions at the facility where the procedure will be performed and determining the indications for the procedure are crucial. Tailored pretreatment and close observation carefully undertaken by an experienced endoscopic specialist are required.
In the future, proof that transnasal endoscopy's diagnostic accuracy is comparable to past results achieved with endoscopic screening is needed for the procedure to be fully included within the framework of endoscopic screening. In addition, fostering numerous endoscopic specialists, reducing procedure-related disparities among facilities, and implementing strict quality control are essential for the wider use of the procedure as part of organized screening.
In terms of today, drafting of guidelines is expected to help deal with the involved nature of pretreatment and also resolve the variance in methodologies. Individual manufacturers are expected to work on developing new endoscopes that remedy the problems of image quality and maneuverability.
