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Stage 2Category: INTRODUCTION OF THE ESOPHAGOSCOPE Source: A Manual Of Peroral Endoscopy And Laryngeal Surgery Passing the cricopharyngeus is the most difficult part of esophagoscopy, especially if the patient is unanesthetized. Local anesthesia helps little, if at all. The handle of the esophagoscope is still pointing upward and consequently we are sure that the lip of the esophagoscope is directed anteriorly. Force must not be used, but steady firm pressure against the tonically contracted cricopharyngeus is made, while at the same time the distal end of the esophagoscope is lifted by the left thumb. At the first inspiration a lumen will usually appear in the upper portion of the endoscopic field. The tip of the esophagoscope enters this lumen and the slanted end slides over the fold of the cricopharyngeus into the cervical esophagus. There is usually from 1 to 3 cm. of this constricted lumen at the level of the cricopharyngeus and the subjacent orbicular esophageal fibers. [109] [FIG. 67.--Schematic illustration of the author's high-low method of esophagoscopy. In the first and second stages the patient's head fully extended is held high so as to bring it in line with the thoracic esophagus, as shown above. The Rose position is shown by way of accentuation.] [FIG. 68.--Schematic illustration of the anatomic basis for difficulty in introduction of the esophagoscope. The cricoid cartilage is pulled backward against the cervical spine, by the cricopharyngeus, so strongly that it is difficult to realize that the cricopharyngeus is not inserted into the vertebral periosteum instead of into the median raphe.] [FIG. 69.--The upper illustration shows movements necessary for passing the cricopharyngeus. The lower illustration shows schematically the method of finding the pyriform sinus in the author's method of esophagoscopy. The large circle represents the cricoid cartilage. G, Glottic chink, spasmodically closed; VB, ventricular band; A, right arytenoid eminence; P, right pyriform sinus, through which the tube is passed in the recumbent posture. The pyriform sinuses are the normal food passages.] Next: Stage 3 Passing Through The Thoracic Esophagus Previous: Stage I Entering The Right Pyriform Sinus
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