With increasing knowledge of the importance of peroral endoscopic methods in the diagnosis and treatment of diseases other than those caused by foreign bodies, there has been a more general employment of these measures. This is evidenced in the medical literature, which is becoming more voluminous. This cannot be construed, however, as indicating that the dangers of improper use of endoscopic instruments have been lessened.
Technic.—The dangers of esophagoscopy are closely interwoven with the difficulties. Jackson1 classified these as educational, anatomic, physiologic and pathologic. The beginner not only must know the general and local anatomic and physiologic difficulties but must be taught that slight trauma to the esophageal wall may be fatal and that every minute technical detail must be learned and the old tested methods thoroughly mastered before short cuts or new methods are tried. He must realize that esophagoscopy is more difficult and more dangerous than bronchoscopy.
LOUIS H. CLERF, DANIEL C. BAKER. PERORAL ENDOSCOPY. Arch Otolaryngol. 1937;25(3):314–341. doi:10.1001/archotol.1937.00650010352009