Novel magnetic compression technique for establishment of a canine model of tracheoesophageal fistula

Figure 4 Results after implantation. A: 6 d after magnet implantation: X-ray showing that the magnets were located in the digestive tract; B: 8 d after magnet implantation: the magnets were expelled from the animal through the digestive tract; C: 8 d after magnet implantation: esophageal angiography showing the contrast media flowing from the esophagus into the trachea; D: Bronchoscopy showing a fistula located in the posterior wall of the trachea; E: Gastroscopy showing a fistula located in the anterior wall of the esophagus; F: Gastroscopy/bronchoscopy showing methylene blue flowing from the esophagus into the trachea.