Bruising, Forensics

Severe bruises caused by car accident

Image via Wikipedia

Last night I was wondering about bruises. You know sometimes you bash yourself but the bruise doesn’t show up until the next day? Well, with post-mortem examinations, is it possible that there are some cases whereby the person has been bruised but it just didn’t show up before their death?

And if so, would a bruise still be able to show up after death? The problem is, there would be no blood flow to raise to the bruise to the surface of the skin. Maybe bruises show up on people more quickly as they die, because there are usually lots of ways to tell if the bruise is post-mortem or before death. I would have to ask a forensic pathologist.

Here are some interesting little articles: < Medico-Legal Significance of Bruising < Medical reports, bruising caused post-mortem


Aloe can help survival during severe blood loss?

Heart diagram with labels in English. Blue com...

Image via Wikipedia

Just found one of my older LiveJournal posts, it was just a DRAFT of thoughts:

Jan. 16th, 2010 at 6:41 PM

Aloe can help survival during severe blood loss?

I initially searched into this mainly because I was wondering whether panic/increased heart rate sped up blood flow (and therefore blood loss), (and therefore one’s demise), OR, does the quickened blood flow aid the situation, seeing as the heart’s natural response to blood loss is to speed up and release adrenaline as a reaction to lower available oxygen and/or volume of blood itself. Does speeding up of heart rate and blood flow enable the remaining oxygen to be distributed in a way that attempts to simulate the regular amounts.

It is mentioned that aloe increases circulation, and the rats that were injected with it during severe blood loss lived longer than rats that were injected with regular saline. However, the improved circulatory function does pose the risk of obstructing coagulation. Therefore aloe could be useful to prolong a patient’s life, whilst further treatment/aid/procedures are taken to stem the blood flow, or a transfusion is made.

So, is the natural rush of adrenaline, which is automatic in the situation of severe blood loss, helpful? Or is it an inevitable symptom, induced by hemorrhagic shock, which essentially speeds up one’s demise?

Heightened heart rate and blood flow BUT lower blood pressure.

blood flow but lower oxygen and blood volume.

If the heart slowed dramatically rather than speeding dramatically once heavy blood loss is induced, the lowered blood pressure would have an intensified impact…therefore it could be theorised that the over-compensation the heart makes in speeding faster is an attempt to normalise the body and pump oxygen to the parts that need it most.

HOWEVER, with wounds, such as those on major arteries, like the jugular, the heavier blood flow would result in a quicker death.

(Original post can be seen here: LiveJournal)