Lung shots, blood trails and the mechanics involved?

[allan f]

So I want to know the mechanics of a lung hit and a blood trail.  I know that the lungs are controlled by the diaphragm contracting which causes the lungs to expand.  They are in a vacuum within the chest cavity.  When an arrow goes through the lungs there is bleeding from all the vessels that have been cut.

My questions is on those big spraying blood trails, is the diaphragm contracting and relaxing (trying to cause the lungs to inflate) what blows the blood out of the entrance and the exit wounds?  

If so does a shot  quartering away give a poorer blood trial due to the diaphragm being cut?

I would just like to know all the details of the shot and how we get the best blood.

Any thoughts or corrections would be great thanks,
Allan

[Smallwood]

Allan, very interesting question.
I'll be watching this thread to see what developes.

[mwmwmb]

Just a guess, but i would think the spraying is on the exhale portion of the breath were the hole has taken place of the nostrils.

[J-dog]

I would guess to say that the hole int he lungs is a basic sucking chest would. Arteries and veins being cut dispell the blodd on the ground. Many different factors cause death this way though - ya gotta figure blood gets in the way of oxygen exchange, air escaping into the chest cavity causes collapsed lungs, the sheer fact that a lack of negative pressure due to the holes does not allow for good breath exchange.

So it is pretty complex though I am not a doctor I have been around some collapsed lungs and sucking chest wounds (not millitary but fire) I figure a doc on here can really get down to the nitty gritty.

J

[J-dog]

Figure when you breath your ribs expand creating negative pressure in your chest pulling air in through your mouth/nostrils. Now imagine there being 2 more holes for air to enter your chest cavity that WILL NOT be entering your lungs. This air is in your chest cavity leaving less room for your lungs to expand - not a good situation.

J

[Kingwouldbe]

Think of a compressor, the whole circulatory system is under pressure from the hart, if you cut the line or puncture the system, the hart/compressor kicks in and try's to regenerate pressure .

As the hart speeds up trying to regain pressure in the system it blows fluid out of the hole.

As the blood pressure continues to drop the animal go's unconscious, then bleeds to death.

A doctor could explain it more accurately.

[J-dog]

Pretty much like going to sleep one really. due to lack of O2 everything just kinda shuts down like a light switch.

J

[rastaman]

What Kingwouldbe said...if you cut arteries and veins, as long as the heart is pumping, blood will be leaking ...doesn't matter from what direction they are cut.  

[Stone Knife]

 I would just like to know all the details of the shot and how we get the best blood.  

Two holes are better than one  

[aYak]

I wish I had stayed at a Holiday Inn last night  

[Bonebuster]

I`m no doc, but I think King has is explained pretty good.

The bigger the vessels cut the bigger the flow.

More forward in the lungs the better for blood on the ground, because the vessels are bigger. As luck would have it, forward in the lungs means you get some of the mains on the top of the heart.

[Bjorn]

What king said and I will add, with a good double lung hit most of ths blood sprays out the mouth and nose.

[Matt Green]

King got it.  Heart is the pump - an amazing pump - in a 140lb human, resting cardiac output is 5liter/min - during intense exericse (i.e. running full speed after being shot) the cardiac output can reach 25-40Liters/min. Now, imagine, that, of that 25L/min, a big majority is being pumped forcefully, through a system that is usually closed but now (b/c of a well placed shot) is open.  I teach Exercise Physiology at a university and use these examples in class - Friend of mine named Phil Bishop wrote an article that was published in Deer and Deer Hunting about deer blood a few issues back - its worth a read.
matt Green

[Stan the bow man]

bleed out there nose an mouth.

[J-dog]

Got to ask a silly question?? If they bleed out their nose and mouth, and yes they do, why do so many argue about the slit of a 2 blade and the hole of a three blade??

Have we just made that arguement null and void??

J

[30coupe]

J-dog,

A fair amount comes out the holes too. The spray pattern stuff is from the mouth and nose. The ketchup bottle squirts are from the holes. There are lots of arteries in the chest cavity (lungs, heart, and liver all have large arteries). Two holes from a three blade makes tracking easy and short.

[Deadbolt]

the lower the holes in the chest the more blood and the quicker you get it as well...gravity pools the blood low.

with a high double lung you may not get much blood at first because the cavity has to fill some to generate enough pressure.

either way put the arrow in the boiler room and your good to go!

stone knife nailed it though!!

[twitchstick]

I agree with dead bolt, location the hit in the lungs can play a big part.I have had two animals hit high in the lungs and blood trails were light, but the lungs were full and they didn't go far.The way I understand it a hole though both lungs will cause the lungs to collapse and 3/4 away just make a bigger hole.Great question!

[Jack Whitmire Jr]

Two holes in the chest cavity will cause a deer to go down quicker due to the fact that it causes negative pressure on the outside of the lungs -especially if it is cold air( there is a  technical term for this -something double thorax ). The diaphragm will try to work the lungs  pumping blood out both holes. The nasal and throat cavities will spray blood out the nose and mouth. Because the lungs will not work the diaphragm the loss of oxygen/blood causes death very very quickly. Now that is my explanation in hillbilly , someone will get on here and blow my explanation out of the water.

Not a doctor
Just shot a lot of deer
Jack

[rastaman]

maybe a "pneumothorax"....yes i stayed at a Holiday Inn express! lol...the physiology of the "why" the deer dies isn't nearly as important as the anatomy of the "why" the deer dies.  Lower and forward in the lungs leaves better blood than high and back in the lungs.  Two holes are better than one.  Most of the blood trail is left by the entrance and exit wounds...not out the mouth and nose of a lung shot deer.  3 slits are better than 2 slits, but I getter better penetration from 2 with my light weight draw...JMHO...