If the blood drawn by laparotomy is clotted, consider that the puncture has drawn a vessel in the abdominal wall. There is also damage to abdominal organs, especially substantial organs, ruptured liver or spleen, and there is damage to large blood vessels that bleed more rapidly. In this case the blood drawn by abdominal puncture will clot quickly and surgical treatment should be actively chosen. In closed abdominal injuries, if the peritoneum is defibrillated by respiratory movements, non-coagulated blood is usually withdrawn and is also an indication for dissection. In some patients, due to varicose veins of the abdominal wall, the puncture process also tends to puncture the vessels of the abdominal wall, and the blood usually coagulates very quickly. The puncture site should be reselected and reperforated to avoid affecting the clinical diagnosis and the next step of treatment.