_Treatment_.--Acute esophagitis calls for rest in bed, sterile liquid food, and the administration of bismuth powder mentioned in the paragraph on contraindications. An ice bag applied to the neck may afford some relief. The mouth should be hourly cleansed with the following solution: Dakin's solution 1 part Cinnamon water 5 parts. Emphysema unaccompanied by pyogenic processes usually requires no treatment, though an occasional case may require punctures of the skin to liberate the air. Gaseous emphysema and pus formation urgently demand early external drainage, preferably behind the sternomastoid. Should the pleura be perforated by sudden puncture pyo-pneumothorax is inevitable. Prompt thoracotomy for drainage may save the patient's life if the mediastinum has not also been infected. Foreign bodies ulcerating through may reach the lung without pleural leakage because of the sealing together of the visceral and parietal pleurae. In the serious degrees of esophageal trauma, particularly if the pleura be perforated, gastrostomy is indicated to afford rest of the esophagus, and for alimentation. A duodenal feeding tube may be placed through an esophagoscope passed into the stomach in the usual way through the mouth, avoiding by ocular guidance the perforation into which a blindly passed stomach tube would be very likely to enter, with probably dangerous results. [199] CHAPTER XX--PLEUROSCOPY _Foreign bodies in the pleural cavity_ should be immediately removed. The esophageal speculum inserted through a small intercostal incision makes an excellent pleuroscope, its spatular tip being of particular value in moving the lung out of the way. This otherwise dark cavity is thus brilliantly illuminated without the necessity of making a large flap resection, an important factor in those cases in which there is no infection present. The pleura and wound may be immediately closed without drainage, if the pleura is not infected. Excessive plus pressure or pus may require reopening. In one case in which the author removed a foreign body by pleuroscopy, healing was by first intention and the lung filled in a few days. Drainage tubes that have slipped up into the empyemic cavity are foreign bodies. They are readily removed with the retrograde esophagoscope even through the smallest fistula. The aspirating canal keeps a clear field while searching for the drain.