livor mortis
TRANSCRIPT
POSTMORTEM CHANGES
Mahmoud Ahmed Mahmoud
846
CLASSIFICATION
Postmortem Changes:
• Cessation of respiration• Cessation of circulation• Loss of voluntary muscle power
Immediate:
• Skin & Eye changes• Algor mortis• Livor Mortis• Muscle changes
Early:
• Putrefaction• Adipocere formation• Mummification
Late:
POSTMORTEM HYPOSTASIS(LIVOR MORTIS)
Definition:
o Bluish discoloration.o Dependent parts.o Pressure points.
Mechanism:
Dependent Areas:
o Gravitation of blood.
Pressure Areas:
o Compression of BV.
Time:
Completed after 6-8 hrs (Fixation).
Visible after 2 hrs (Diffusion).
Begin after death (Gravitation).
Color:o Normally : Bluish-purple.o CO poisoning : Cherry-red.o CN poisoning : Bright-red.o Phosphorus : Dark-brown.
Color: (Cont.)
o Methemoglobinemia : Brown.o Asphyxia : Deep bluish-violet.o Hemorrhage : ill defined.o Coldness : Pink.
Distribution:
In supine position: In prone position:
Distribution: (Cont.)
Hanging: Drowning:
Distribution: (Cont.)
Moving:
Distribution: (Cont.)
Internal Organs:
Hypostasis & Bruises:
Hypostasis Bruises
Dependent areas Any where
Well defined edges Ill defined edges
Blood is retained in intact capillaries (Intravascular)
Blood escapes through ruptured capillaries
Pale over pressure areas Red
Incision: blood flows from the cut vessel (washable)
Incision: blood coagulates in tissue
No swelling May be with swelling
Medicolegal Importance:
o Sign of death.o Helps in estimating the time of death.o Indicates posture of the body at death.o Colour may indicate the cause of death.o Hypostases may resemble bruises.
Thank You