关键词: 腹部枪弹伤, 动物模型, 磁吻合

Abstract: Objective To establish an animal model of abdominal bullet wound, and study the application of rapid anastomotic magnetic ring in animal models of abdominal bullet wounds, providing ideal animal modeling for clinical and basic research of field surgery. Method To establish the animal model of abdominal bullet wound, right lower abdomen of Bama miniature pigs were injured with a domestic 95-type assault rifle. Qualified animal models were randomly divided into magnetic loop rapid anastomosis group and manual suture group. Intraoperative monitoring of vital signs and completion time of magnetic compression anastomosis were recorded. In the experimental group, to observe the position of the magnetic ring, X-ray examination was performed on the 3rd, 7th and 10th days, and the discharge time of the magnetic ring were recorded. The animals were sacrificed 4 weeks after the operation, the healing of the anastomotic stoma was observed, and pathological examination was conducted. Result Shooting from 5 m away animals, the modeling result were ideal. The entrance and exit of the bullet wound were clearly visible, the amount of bleeding was small, the intestinal penetrating injury was obvious, and one or more intestinal perforations were displayed. While shooting from 10 m away, amount of bleeding was large and more than half of the animals died. It took about 2 minutes to perform intestinal anastomosis with a magnetic ring, which was about 20 minutes shorter than the traditional manual suture, and the differences were significant. Post-operative X-ray showed that the magnetic ring was present in the bowel, and the magnetic ring was excreted with the stool within 2 weeks after the operation. Histological observation showed that the infiltration of inflammatory cells in the magnetic ring group was better than that in the suture group. Conclusion An animal model of abdominal bullet wound was successfully established. Compared with the traditional manual suture, the anastomotic magnetic ring has great advantages in the treatment of abdominal intestinal rupture caused by bullets, providing experimental support for the rapid treatment of field wounds in the future.

Key words: abdomen bullet wound, animal model, magnetic anastomosis