Archive
All articles
146 articles · page 7 of 7
Where Does the Measurement "Fr" (French) Come From, and What Does It Mean? 1 French (Fr) = 0.33 mm. The French gauge system, devised by J.-F.-B. Charriere, standardizes endoscope working channel diameters and accessory sizes. Here's what every endoscopist needs to know. 
Zenker Dysphagia in an Elderly Patient