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The post-mortem interval ( PMI) is the time that has elapsed since an individual's death. [1] When the time of death is not known, the interval may be estimated, and so an approximate time of death established. Postmortem interval estimations can range from hours, to days or even years depending on the type of evidence present. [2]
These changes can generally be divided between early post-mortem changes and late post-mortem changes (also known as decomposition). These changes occur along a continuum and can be helpful in determining the post-mortem interval, which is the time between death and examination. The stages that follow shortly after death are:
Post-mortem chemistry, also called necrochemistry or death chemistry, is a subdiscipline of chemistry in which the chemical structures, reactions, processes and parameters of a dead organism is investigated. Post-mortem chemistry plays a significant role in forensic pathology. Biochemical analyses of vitreous humor, cerebrospinal fluid, blood ...
t. e. Timeline of postmortem changes, with algor mortis represented by red temperature line. Algor mortis (from Latin algor 'coldness', and mortis 'of death'), the third stage of death, is the change in body temperature post mortem, until the ambient temperature is matched. This is generally a steady decline, although if the ambient temperature ...
v. t. e. Depiction of a body after suicide hanging. Livor mortis is fixed in the legs and distal upper extremities because these were the dependent parts. Livor mortis ( Latin: līvor – "bluish color, bruise", mortis – "of death"), postmortem lividity (Latin: postmortem – "after death", lividity – "black and blue"), hypostasis ( Greek ...
An autopsy (also referred to as post-mortem examination, obduction, necropsy, or autopsia cadaverum) is a surgical procedure that consists of a thorough examination of a corpse by dissection to determine the cause, mode, and manner of death; or the exam may be performed to evaluate any disease or injury that may be present for research or educational purposes.
Forensic entomology, the study of insects (arthropods) found in decomposing humans is the most popular field of study used in determining the post-mortem interval (PMI). This technique, however, is still new and consistently being improved, and—as such—it can work well with other techniques such as forensic anthropology, though forensic ...
Postmortem interval estimation A pig carcass in the decay stage of decomposition. A crucial component of forensic entomology is the calculation of the postmortem interval (PMI), which mostly depends on the observation of the insect activity on a corpse.