• Diana K Bowen, Julian Wan, Rainer Engel, Richard P Lyon, Elodi Dielubanza, and David A Bloom.
• Department of Urology, Feinberg School of Medicine, Northwestern University, Tarry 16-703, 303 East Chicago Ave, Chicago, IL 60611, USA. Electronic address: dkbowen@gmail.com.
• J Pediatr Urol. 2014 Dec 1; 10 (6): 1106-10.

AbstractParisian cutler Joseph-Frédéric-Benoît Charrière (1803-1876) contributed greatly to surgical disciplines with innovative tools, but his legacy is the gauge system he developed in 1842 that is still used for catheters, probes, and dilators. Sounding devices have been documented in the surgical armamentarium since 3000 BC, with practitioners such as Hippocrates, Galen, Celsus, and Al-Zahrawi espousing theories on sounding and the related topics of stones and urinary obstruction. The medical revolution in 19th-century Paris propelled technology and one of the most influential men involved was Charrière, who pioneered diverse technical processes in the manufacturing of surgical instruments, led one of the largest instrument manufacturing companies, and improved on tools introduced by predecessors including his mentor Guillaume Dupuytren. Most importantly he created the catheter scale that, despite not being favored in its country of origin, became an international standard and is known today as the French system. The classification of sounds, catheters, and bougies has undergone many variations throughout the years, but the French scale still holds in current medical practice as an accurate and nearly universal sizing tool. Copyright © 2014 Journal of Pediatric Urology Company. Published by Elsevier Ltd. All rights reserved.

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