The most common substantive organ injury in closed abdominal injuries is the spleen, because closed abdominal injuries are a medical term, which means that there is no obvious wound on the abdominal body skin, but mainly damage to tissues and organs in the abdominal cavity caused by rupture injury conduction. Injuries to tissues and organs in the abdominal cavity include cavernous organs and substantive organs, and cavernous organs are mainly small intestine and colon, if rupture causes intestinal contents or gastric contents to flow into the abdominal cavity, it usually causes symptoms of peritonitis, manifested as abdominal pain, muscle tension, pressure pain, rebound pain, and free gas can be seen on abdominal radiography or CT examination. In contrast, substantial organs mainly include the liver and spleen, and the injury mainly results in symptoms of intra-abdominal hemorrhage and signs of shock such as decreased blood pressure and increased heart rate.