A peritoneal puncture into a blood vessel or hematoma appears to be

1. Uncoagulated blood drawn by abdominal puncture suggests ruptured hemorrhage of a substantial organ because the defibrillating surface of the peritoneum renders the blood noncoagulable. If the extracted blood coagulates rapidly, it is mostly due to accidental puncture of a blood vessel or hematoma by the puncture needle.

2. Abdominal X-ray examination, such as the discovery of free gas under the diaphragm can be used as a basis for the diagnosis of intra-abdominal cavity organ perforation, X-ray negative can never be easily denied.