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The Light Reflex On The ForcepsCategory: MECHANICAL PROBLEMS OF BRONCHOSCOPIC FOREIGN BODY EXTRACTION Source: A Manual Of Peroral Endoscopy And Laryngeal Surgery It is often difficult for the beginner to judge to what depth an instrument has been inserted through the tube. On slowly inserting a forceps through the tube, as the blades come opposite the distal light they will appear brightly illuminated; or should the blades lie close to the light bulb, a shadow will be seen in the previously brilliantly lighted opposite wall. It is then known that the forceps are at the tube mouth, and the endoscopist has but to gauge the distance from this to the foreign body. This assistance in gauging depth is one of the great advances in foreign body bronchoscopy obtained by the development of distal illumination. Hooks are useful in the solution of various mechanical problems, and may be turned by the operator himself into various shapes by heating small probe-pointed steel rods in a spirit lamp, the proximal end being turned over at a right angle for a controlling handle. Hooks with a greater curve than a right angle are prone to engage in small orifices from which they are with difficulty removed. A right angle curve of the distal end is usually sufficient, and a corkscrew spiral is often advantageous, rendering removal easy by a reversal of the twisting motion (Bib. 11, p. 311). Next: The Use Of Forceps In Endoscopic Foreign Body Extraction Previous: Mechanical Problems Of Bronchoscopic Foreign Body Extraction*
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