FMT- Signs of Death Flashcards
enumerate changes in eye
Loss of corneal and pupillary reflexes, loss of Intraocular tension, Puppils, Shape of pupils, Retina, Opacity of cornea, Tache-noire
sites used to measure core temp of body
Intracerebral (thro orbit), Nostrils upto cribriform plate, EAM, Rectum, Subhepatic
immediate changes after death
irreversible cessation of- brain (including brainstem), respi, circulation
early changes after death
- changes in the skin and facial pallor
- primary relaxation or flaccidity of muscles
- contact flattening and pallor
- changes in eye
first sign of death
algor mortis
mesmeric trance
like hypnotism
catalepsy
neuro finding of prolonged muscle rigidity and immobility
cheyne-stokes respi
atypical pattern of breathing involving deep breathing followed by shallow breathing
nysten’s law (order)
muscles of eyelids (3 to 5 hrs), jaw and facial muscles (4 to 5 h), neck and thorax (5 to 7 h), upper limb (7 to 9 h), abdomen and lower limb (9 to 11h), fingers and toes (11 to 12h)
3 phases of algor mortis
isothermic phase
intermediate phase
terminal phase
average fall of body temp
0.4 to 0.7 C/h
factors affecting algor mortis
env temp (most imp)
air movement
humidity
medium of disposal
built of body
age and sex
clothing
position and posture
mode of death
development of pm staining
early stage 30min to 1h of discolored patches
3-4h patches increase in size
coalesce with each other in 4h
complete in 5-6h
fixation of pm staining
fixed in 8-12h, persists until putrefaction
factors affecting rigor mortis
env temp
musc activ
mode of death
built
age
external signs of decomposition
4 d’s
1. discoloration
2. distention
3. degradation
4. dissolution
factors affecting putrefaction
ext-
1. env temp
2. moisture
3. air
4. clothing
5. manner of burial
int-
1. age
2. sex
3. conditn of body
4. cause of death
5. external injury on body
factors influencing decompositon in water
- water temp and salinity
- water current
- quality of water
- aquatic animals
factors influencing floatation
- decomposition
- salinity of h20
- stagnant water
- clothing
- age
- sex
- season
factors influencing adipocere
- age
- built
- env temp
- moisture
- air current
- running water
- bact infectn
factors influencing mummification
- hot env
- dry atmosphere
- free air movement
- contact of body with absorbing media
- poisoning
time since death from csf
LAN is increased in 15h after death
L- Lactic acid
A- amino acids
N- non protein nitrogen
time since death from vitreous humor
rise in vitreous potassium upto 100h
rise in hypoxanthine upto 120h
