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{{Signs of death}} | |||
'''Algor mortis''' ([[Latin]]: ''algor''—coldness; ''mortis''—of death) is the reduction in body temperature following [[death]]. This is generally a steady decline until matching [[ambient temperature]], although external factors can have a significant influence. | |||
== Use in forensic science and crime solving == | |||
A measured rectal temperature can give some indication of the time of death. Although the [[heat conduction]] which leads to body cooling follows an [[exponential decay]] curve, it can be approximated as a linear process: 2° Celsius during the first hour and 1° Celsius per hour until the body nears ambient temperature. | |||
The '''Glaister equation'''<ref>http://www.fmap.archives.gla.ac.uk/DC403/DC403_page.htm</ref><ref>{{cite book|title=Forensic Medicine|author=Guharaj, P. V.|chapter=Cooling of the body (algor mortis)|year=2003|edition=2nd|pages=61–62|publisher=Longman Orient|location=Hyderabad|url=http://books.google.com/books?isbn=8125024883}}</ref> estimates the hours elapsed since death as a [[linear function]] of the [[rectal temperature]]: | |||
:<math> | |||
\frac{98.4\,^{\circ}{\rm F} - \text{rectal temperature in Fahrenheit}}{1.5} | |||
</math> | |||
<!-- (98.4 °F - [rectal temperature in Fahrenheit]) div 1.5 --> | |||
As [[decomposition]] occurs the internal body temperature tends to rise again. | |||
== Factors affecting the rate of algor mortis == | |||
Generally, temperature change is considered an inaccurate means of determining time of death, as the rate of change is affected by several key factors including:<ref>http://www.crimewatchcanada.com/index.php?option=com_content&view=article&id=79:changes-to-a-body-after-death&catid=41:january-february-2010-issue-76&Itemid=53</ref> | |||
* Stability or fluctuation of the ambient temperature. | |||
* The thermal conductivity of the surface on which a body lies. | |||
* Diseases or drugs which increase body temperature raising the starting temperature of the corpse at the time of death | |||
* The existence of a "temperature plateau",<ref>{{cite journal|last=Kaliszan|first=M.|title=Verification of the exponential model of body temperature decrease after death in pigs|journal=Experimental Physiology|date=20 May 2005|volume=90|issue=5|pages=727–738|doi=10.1113}}</ref> a highly variable period of time in which the body does not cool. | |||
==References== | |||
{{reflist}} | |||
* {{cite book | first=Richard| last=Saferstein| year=2004| title=Criminalistics An Introduction to Forensic Science| edition=8th| publisher=Pearson Prentice Hall| isbn=0-13-113706-9 }} | |||
* Karen T. Taylor, "Forensic art and illustration", CRC Press, 2000, ISBN 0-8493-8118-5, p. 308 | |||
* Robert G. Mayer, "Embalming: history, theory, and practice", McGraw-Hill Professional, 2005, ISBN 0-07-143950-1, p. 106 | |||
* Calixto Machado, "Brain death: a reappraisal", Springer, 2007, ISBN 0-387-38975-X, pp. 73–74 | |||
==External links== | |||
* [http://www.arrakis.es/~jacoello/date.pdf Standards Employed to Determine Time of Death] | |||
{{DEFAULTSORT:Algor Mortis}} | |||
[[Category:Signs of death]] | |||
[[Category:Latin medical phrases]] | |||
{{med-sign-stub}} | |||
{{death-stub}} | |||
{{Latin-vocab-stub}} | |||
Revision as of 16:34, 12 December 2013
Algor mortis (Latin: algor—coldness; mortis—of death) is the reduction in body temperature following death. This is generally a steady decline until matching ambient temperature, although external factors can have a significant influence.
Use in forensic science and crime solving
A measured rectal temperature can give some indication of the time of death. Although the heat conduction which leads to body cooling follows an exponential decay curve, it can be approximated as a linear process: 2° Celsius during the first hour and 1° Celsius per hour until the body nears ambient temperature.
The Glaister equation[1][2] estimates the hours elapsed since death as a linear function of the rectal temperature:
As decomposition occurs the internal body temperature tends to rise again.
Factors affecting the rate of algor mortis
Generally, temperature change is considered an inaccurate means of determining time of death, as the rate of change is affected by several key factors including:[3]
- Stability or fluctuation of the ambient temperature.
- The thermal conductivity of the surface on which a body lies.
- Diseases or drugs which increase body temperature raising the starting temperature of the corpse at the time of death
- The existence of a "temperature plateau",[4] a highly variable period of time in which the body does not cool.
References
43 year old Petroleum Engineer Harry from Deep River, usually spends time with hobbies and interests like renting movies, property developers in singapore new condominium and vehicle racing. Constantly enjoys going to destinations like Camino Real de Tierra Adentro.
- 20 year-old Real Estate Agent Rusty from Saint-Paul, has hobbies and interests which includes monopoly, property developers in singapore and poker. Will soon undertake a contiki trip that may include going to the Lower Valley of the Omo.
My blog: http://www.primaboinca.com/view_profile.php?userid=5889534 - Karen T. Taylor, "Forensic art and illustration", CRC Press, 2000, ISBN 0-8493-8118-5, p. 308
- Robert G. Mayer, "Embalming: history, theory, and practice", McGraw-Hill Professional, 2005, ISBN 0-07-143950-1, p. 106
- Calixto Machado, "Brain death: a reappraisal", Springer, 2007, ISBN 0-387-38975-X, pp. 73–74
External links
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Template:Death-stub
Template:Latin-vocab-stub
- ↑ http://www.fmap.archives.gla.ac.uk/DC403/DC403_page.htm
- ↑ 20 year-old Real Estate Agent Rusty from Saint-Paul, has hobbies and interests which includes monopoly, property developers in singapore and poker. Will soon undertake a contiki trip that may include going to the Lower Valley of the Omo.
My blog: http://www.primaboinca.com/view_profile.php?userid=5889534 - ↑ http://www.crimewatchcanada.com/index.php?option=com_content&view=article&id=79:changes-to-a-body-after-death&catid=41:january-february-2010-issue-76&Itemid=53
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