Postmortem computed tomography differentiation between intraperitoneal decomposition gas and pneumoperitoneum.

PURPOSE: The aim of this study is to investigate the ability of postmortem computed tomography (PMCT) to distinguish intraperitoneal decomposition gas from pneumoperitoneum due to intestinal perforation. METHODS: This retrospective study investigated the factors affecting intraperitoneal gas in two groups of 14 decedents as detected by postmortem CT performed in the Department of Legal Medicine of Hamburg University. The first group died with a cause of death associated with intestinal perforation, and the second group with other different natural causes of death. These factors include postmortem interval, gas volume, gas distribution, radiology alteration index (RAI), and pneumoperitoneum-associated pathology. RESULTS: The findings of this study showed the appearance of specific gas distribution patterns and a significant increase in gas volumes in the cases of intestinal perforation. Moreover, postmortem interval and the pneumoperitoneum-associated pathology could help distinguish postmortem-generated gas from pneumoperitoneum. CONCLUSION: Based on the findings of this study, we propose that these findings can improve the proper detection of intestinal perforation cases in the future.

Diagnostic value of multiphase postmortem computed tomography angiography in selected cases of blunt traumatic deaths.

OBJECTIVES: Recently, multiphase postmortem computed tomography angiography (MPMCTA) has been proven as a reliable tool in the diagnosis of vascular pathology, while its potential efficiency in the detection of soft tissue lesions is ignored. In this study, we have evaluated the overall diagnostic value of MPMCTA in the diagnosis of blunt traumatic deaths in selected cases to determine its additional advantages and limitations in order to identify its potential applications. METHODS: This prospective study examined 14 decedents presented to the Department of Legal Medicine of Hamburg University that alleged death due to blunt trauma. For each case, MPMCTA and conventional autopsy findings were compared. Both radiological and autopsy findings are divided according to the body regions in addition to the detection of the cause of death. RESULTS: Both MPMCTA and the conventional autopsy showed the major findings but not all findings. MPMCTA was better in the demonstration of vascular and skeletal lesions, while the diagnosis of parenchymal injury remains autopsy-dependent. The efficiency of MPMCTA for detection of haemorrhage was relatively affected by the blood amount and the location of the bleeding source. The presented MPMCTA-related artefacts interfered with the accurate diagnosis of certain injuries. CONCLUSION: The combination of MPMCTA with conventional autopsy appears to be the gold standard for investigation of blunt traumatic deaths. Depending on the death circumstances and the expected findings, MPMCTA can be performed alone in selected cases.