Home >  What's a swallowing problem? >  Normal Swallow >  Candidates for swallowing evaluation >  Diagnostic Testing >  Disorders >  Treatment >  Image Gallery Transnasal Flexible Laryngoscopy (TFL)   Transnasal Flexible Laryngoscopy (TFL), is a way of examining the larynx and throat with a thin, flexible endoscope that is passed via the nose which permits a magnified view of the laryngeal structures and functions.           ________________________________________________________           © 2007 Voice & Swallowing Center | Legal Disclaimer