Massive hydraulic failure

Fair enough.

Massive hydraulic failure speaks to a projectile's ability to cause a rapid drop in blood pressure immediately or nearly immediately after being shot, which causes the person or animal to feint.

I had a backhoe I was operating suffer massive hydraulic failure once - broke a fitting off a cylinder and sprayed hydraulic fluid all over the place.

Right. A garbage truck had one of those massive hydraulic failures in front of our house. There's still an oil stain on the street.

All kidding aside, I've never heard of a loss of blood pressure referred to as a "massive hydraulic failure" Is this really a medical term or some gamer terminology?

TLW, Massive or rapid hydraulic failure is bleeding out yeah. But not what I am talking about. Just because your bloodpressure has rapidly dropped causing your body to shut down does not mean you are dead. Though that is likely going to be the case. GTC, I don't know. I don't play video games. Havent since I had kids of my own.

Anyway. When talking about immediate effects on the body people will often tell you that "it depends" But the thought behind this subject is that if your chosen round, or caliber is sufficient enough to cause this rapid drop in blood pressure it supposedly takes out the "it depends" factor.

Now, that said. Ive seen it happen, both with animals, and with humans in country. But the "it depends" factor still applies.

Anyone who has ever been hunting medium game has seen it happen. Hunting with a heavy load that creates a massive wound channel. Say a shotgun slug. You take your shot, see the deer stiffen up and then fall over. But they aren't dead. You can still see them breathing. However, at the same time another shot on another animal of about the same size may render a different result. But why, when the impacts are almost identical do you come up with a different result? What was it that allowed that animal to take off running when the other feinted from the sudden bloodpressure?

I think it falls under the general heading of 'Shock';

en.wikipedia.org/wiki/Shock_(circulatory)#Cardiogenic

(Where is armynurse when we need him?)

Here's some medical discussion about hypovolemic shock - lack of adequate profusion: (written about humans, but may apply more generally)

Compensated: The body is still able to compensate for the decrease in perfusion. Cardiac Output and systolic blood pressure are maintained.

Uncompensated: The body's compensation mechanisms are starting to fail. Blood pressure begins to decrease and patient condition worsens.

Irreversible: Cell and tissue ischemia leads to organ death due to lack of perfusion. This process may begin on day one and continue to occur for up to three weeks after the initial insult. Under such circumstances, the patient should be re-evaluated to determine whether some reversible causes of the persistent shock may have been overlooked.

dynamicnursingeducation.com/class.php?class_id=47&pid=18

Speaking in human terms, children are said to compensate better than adults for a time, then suddenly fall away - where adults (humans) compensate so-so most of the time only to slowly lose ground in more cases.

A lot of this has to do with adrenaline and oxygen intake.

Perhaps what you are seeing involves different ages, or different individual constitutions?

(Children and Hypovolemic Shock):

www.uptodate.com/contents/initial-evaluation-of-shock-in-children?source=see_link

Not really 'timeframe' per se. It's just that certain folks being of younger ages can sometimes resist the effects of hypovolemic shock longer than say folks who are older and of less of a constitution.

I merely wonder if the same sort of thing can happen in the animal world. (see the second link about children and hypovolemic shock.

Two points. And I'll try and keep them brief:

Point one: In medic training, we used "S.H.R.I.M.P C.A.N." to help us remember the different types of shock that are out there -

SHRIMP CAN -

Septic
Hypovolemic
Respiratory
Insulin
Metabolic
Psychogenic

Cardiogenic
Anaphylactic
Neurogenic

Point two: Succumbing to shock, at different rates or speeds -

It depends which one you have and what your ability to compensate for it is -

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These are clips from a pdf available from googling "what affects the rate at which one succumbs to shock?":

[PDF]Shock is one of the most frequently diagnosed, yet poorly ...

www.google.com/#hl=en&tbo=d&sclient=psy-ab&q=what+affects+the+rate+at+which+one+succumbs+to+shock%3F&oq=what+affects+the+rate+at+which+one+succumbs+to+shock%3F&gs_l=hp.3...2070.13678.2.13873.45.36.1.8.9.1.138.2740.31j5.36.0.les%3B..0.0...1c.1.NBeGRAOqmS8&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&bvm=bv.1355325884,d.b2I&fp=1a3768278019f5af&bpcl=39967673&biw=1316&bih=625

And as stated earlier, the earlier link discusses how children are often seen as extremely strong at compensating for shock - until they succumb, then they fall away far quicker than adults.

PAGE 495 3-A
books.google.com/books?id=lSqeHiQrCs4C&pg=PA495&lpg=PA495&dq=children+can+compensate+for+shock+longer+than+adults&source=bl&ots=h58qk_VSX6&sig=hkVXOogwXVuAKFw2o89v5w934QI&hl=en&sa=X&ei=sN7OUI7cPMqa2gXKuoGABg&sqi=2&ved=0CGEQ6AEwCQ#v=onepage&q=children%20can%20compensate%20for%20shock%20longer%20than%20adults&f=false



Which tends to make me wonder, or at least consider, one possible reason for the different outcomes you've observed could be due to age.

Another could be other compensatory factors, which I'll refer to as "compensatory mechanisms" -- basically an individual more suited to holding one's breath, may fair better at dealing with shock for a longer period than another person who cannot hold his breath as well. Something to that effect.


(also, there is this too - maybe - )

Deep behind the meaning of "compensating for shock" exists something perhaps more specific:

For the animal that is immediately downed (visually falls) and for the other animal that continues to run around for a time, they both may end up actually dieing at about the same time. Only the one who went down immediately looks to be dead first. While the other, running around seems to be doing better. Since we are not actually with each animal until after reaching them, we seem to see very different states of being after they are each shot. When actually, we are witnessing two different levels of compensating for shock. Much like the child who is in equal peril with the adult suffering from shock, the child falls away quicker than the adult, so that they both die at about the same time, or even the child dies first. But, the child seemed to fair better than the adult from merely visual accounts.

Adrenaline is one of the first things the body pours on in an attempt to secure proper profusion. Trouble is, a lot of adrenaline makes it difficult to stay still when we probably should. That, and all the pain, motivates many of us to move!! (initially) That's all part of the compensative phase of shock.

For instance, traveling on the 405 freeway, North bound, going on the downhill side, over the hill to the valley, I witnessed a large garbage truck, flat-nose, go off the right side of the road in order to avoid smashing into the back of a set of stopped vehicles. The truck smashed into the retaining wall at an angle in such a way that the driver was forced out the front windshield (tall glass). His body slams against the retaining wall. He falls to the ground, leaps up, and starts running around in pain and panic. Then, suddenly flops to the ground totally silent.

Looked to me to be a classic case of adrenaline, shock, pain, all of that.