New diagnostic aids or procedures become valuable and attain popularity only when they can be employed with safety by those skilled in their use and when they either supplement or supplant methods previously employed. Gastroscopy, practiced with the open tube, has been accepted for a long time as a valuable aid in the removal of a foreign body from the stomach. However, visualization of the interior of the stomach by this means has not met with general favor for several reasons, chief among these being the necessity for expert training in the passing of the tube safely and the impossibility of visualizing a great part of the interior of the stomach.
Peroral Gastroscope.—The recent development by Wolf and Schindler of a flexible gastroscope with a lens system has contributed greatly to the diagnostic possibilities in cases of gastric disease. In discussing the advantages of the flexible gastroscope
CLERF LH, BAKER DC. Progress in Otolaryngology: Summaries of the Bibliographic Material Available in the Field of Otolaryngology: PERORAL ENDOSCOPY. Arch Otolaryngol. 1936;23(3):351–376. doi:10.1001/archotol.1936.00640040359009
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