Blunt Force Trauma Lethality Posted by karlrehn

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oljames3
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Blunt Force Trauma Lethality Posted by karlrehn

#1

Post by oljames3 » Mon May 28, 2018 10:49 pm

http://blog.krtraining.com/blunt-force- ... lethality/
It’s critical for armed individuals, civilians and police alike, to understand the ability of even unarmed, untrained individuals to cause death or greivous bodily injury through blunt force trauma. Failing to control interactions early can leave you in a position where you’re left with no option but to use deadly force.
Karl Rehn, of https://KRTraining.com, included this article in his May blog. In it, Karl discusses dealing with aspects of an unarmed assault.

I've taken several classes that Karl offers in this vein and will be taking Karl's Personal Tactics Skills on June 9. https://www.krtraining.com/KRTraining/C ... Skills.htm

This is the final class in my qualifying in KR Training's Defensive Pistol Skills Program. https://www.krtraining.com/KRTraining/d ... ogram.html
O. Lee James, III Captain, US Army (Retired 2012), Honorable Order of St. Barbara
2/19FA, 1st Cavalry Division 73-78; 56FA BDE (Pershing) 78-81
NRA Distinguished Life Member (Disabled Vet), TSRA, NAR L1


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Re: Blunt Force Trauma Lethality Posted by karlrehn

#2

Post by MaduroBU » Tue May 29, 2018 12:01 am

Movies and television teach us that being "knocked out" is a temporary event with no lasting effects. Even among Hollywood's pantheon of lies, this one ranks near the top.

Blunt head trauma, which may or may not involve a clinically or radiographically visible injury to the bones, can cause intracranial bleeding and/or traumatic brain injury. A bleed may be arterial or venous, with the chief clinical distinction being the pressure within the affected system. An arterial bleed (a "subarachnoid hematoma") often allows for a "lucid interval" of a few hours after which the pressure of the growing intracranial hematoma upon the brain grows to such an extent that rapid death will result without prompt craniotomy. CAVEMEN trepanned their compatriots when so injured because even THEY realized that the injury was certainly fatal if not treated. Ponder that- this is an injury so severe that people with no knowledge of anatomy, germ theory, antiseptics, or even metal tools still felt that the risk of neurosurgery was merited (medicine and archaeology proves that they were right). The bleeding injury could also be of a venous nature (a "subdural hematoma"), which will take longer to manifest and often presents as subtle personality changes; these injuries often do not require surgical treatment, but that distinction is made by neurosurgeons with the aid of CT scans. A venous head bleed is a comparatively minor problem TO ME, because I have instant recourse to CT scanners and in-house neurosurgeons; It will probably get you transferred out of a community hospital for a higher level of care.

The injury might also be to the brain parenchyma, in which case it is a traumatic brain injury. The brain is not a tough organ (strangely enough embalmed brains are- it always amazed me how solid those things were), having an unusually high concentration of lipids which essentially function as the insulators for billions of miniscule wires ("axons"). In addition, most of the activity that we associate with the brain occurs near the surface of the brain, particularly in the telencephalon, with thinking occurring in the prefrontal cortex (the area beneath your forehead). Abrupt acceleration deceleration injuries can cause undetectably tiny and numerous tears in the fabric of the brain which, in aggregate, can constitute terrible injuries. TBI ranges in severity from "overcome with therapy" to "PVS", and the mechanism of injury may not be a good guide to where on that spectrum any one injury might fall. Blunt trauma severity follows an unpredictable scale with regard to causative injury, with the effects of multiple insults being additive (possibly in a supra-linear manner, see Chronic Traumatic Encephalopathy).

Finally, lack of blood flow the brain can result in anoxic brain injury. This sort of injury need not involve trauma to the head. The brain uses 20% of the cardiac output at rest, and the body will sacrifice everything else to preserve it. Many hand to hand fighting techniques are based upon denying blood flow to the brain, thus incapacitating one's opponent through unconsciousness. The differences between "incapacitated", "dead", and "victim of irreversible cognitive damage" can be very slight amounts of time. An assailant may not care that you have gone limp and are suffering brain damage and/or dying. Injuries which affect your heart's ability to provide your brain with blood can cause terrible cognitive deficits even if prompt medical attention saves your life.

That may be more than any cared to read about a genuinely terrible class of injuries, but their importance simply cannot be overstated.


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Re: Blunt Force Trauma Lethality Posted by karlrehn

#3

Post by Mike S » Tue May 29, 2018 6:16 am

MaduroBU wrote:
Tue May 29, 2018 12:01 am
That may be more than any cared to read about a genuinely terrible class of injuries, but their importance simply cannot be overstated.
Quite the contrary; it was astutely written & well worth the read. Thanks for taking the time to write it.

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Re: Blunt Force Trauma Lethality Posted by karlrehn

#4

Post by Charles L. Cotton » Tue May 29, 2018 1:43 pm

MaduroBU wrote:
Tue May 29, 2018 12:01 am
Movies and television teach us that being "knocked out" is a temporary event with no lasting effects. Even among Hollywood's pantheon of lies, this one ranks near the top.

Blunt head trauma, which may or may not involve a clinically or radiographically visible injury to the bones, can cause intracranial bleeding and/or traumatic brain injury. A bleed may be arterial or venous, with the chief clinical distinction being the pressure within the affected system. An arterial bleed (a "subarachnoid hematoma") often allows for a "lucid interval" of a few hours after which the pressure of the growing intracranial hematoma upon the brain grows to such an extent that rapid death will result without prompt craniotomy. CAVEMEN trepanned their compatriots when so injured because even THEY realized that the injury was certainly fatal if not treated. Ponder that- this is an injury so severe that people with no knowledge of anatomy, germ theory, antiseptics, or even metal tools still felt that the risk of neurosurgery was merited (medicine and archaeology proves that they were right). The bleeding injury could also be of a venous nature (a "subdural hematoma"), which will take longer to manifest and often presents as subtle personality changes; these injuries often do not require surgical treatment, but that distinction is made by neurosurgeons with the aid of CT scans. A venous head bleed is a comparatively minor problem TO ME, because I have instant recourse to CT scanners and in-house neurosurgeons; It will probably get you transferred out of a community hospital for a higher level of care.

The injury might also be to the brain parenchyma, in which case it is a traumatic brain injury. The brain is not a tough organ (strangely enough embalmed brains are- it always amazed me how solid those things were), having an unusually high concentration of lipids which essentially function as the insulators for billions of miniscule wires ("axons"). In addition, most of the activity that we associate with the brain occurs near the surface of the brain, particularly in the telencephalon, with thinking occurring in the prefrontal cortex (the area beneath your forehead). Abrupt acceleration deceleration injuries can cause undetectably tiny and numerous tears in the fabric of the brain which, in aggregate, can constitute terrible injuries. TBI ranges in severity from "overcome with therapy" to "PVS", and the mechanism of injury may not be a good guide to where on that spectrum any one injury might fall. Blunt trauma severity follows an unpredictable scale with regard to causative injury, with the effects of multiple insults being additive (possibly in a supra-linear manner, see Chronic Traumatic Encephalopathy).

Finally, lack of blood flow the brain can result in anoxic brain injury. This sort of injury need not involve trauma to the head. The brain uses 20% of the cardiac output at rest, and the body will sacrifice everything else to preserve it. Many hand to hand fighting techniques are based upon denying blood flow to the brain, thus incapacitating one's opponent through unconsciousness. The differences between "incapacitated", "dead", and "victim of irreversible cognitive damage" can be very slight amounts of time. An assailant may not care that you have gone limp and are suffering brain damage and/or dying. Injuries which affect your heart's ability to provide your brain with blood can cause terrible cognitive deficits even if prompt medical attention saves your life.

That may be more than any cared to read about a genuinely terrible class of injuries, but their importance simply cannot be overstated.
This information is important to know and not only from a medical or tactical viewpoint. Foreknowledge of the potential sequelae of blunt force trauma to the head can and should play an important role in your legal position and defense.

This example is not directly on point, but the concept is the same. If you are threatened by a stranger and you feel it necessary to defend yourself, the fact that this stranger has a violent past and criminal history is not available as a justification for your actions. Why? Because you were not aware of his violent past and tendencies. (It may be admissible on the issue of who was the aggressor.) However, if you are attacked by a person you know to be violent, it is relevant to your "reasonable belief that force (or deadly force) was immediately necessary."

Many, perhaps most, people unfamiliar with the information MaduroBU posted think that getting punched in the face or head one or a few times is not likely to cause death or serious bodily injury. Thus, in their minds, deadly force is not justified. That is you could not have had a "reasonable belief that force (or deadly force) was immediately necessary." Your knowledge of the real threat, coupled with expert testimony on the issue to convince those evaluating your actions, can make the difference between being charged or not, a "No Bill" or an indictment, a conviction or an acquittal. This doesn't mean that deadly force is justified in every situation where someone tries to punch you in the nose. The totality of the facts will be critical.

Thanks for posting this MaduroBU.

Chas.
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Re: Blunt Force Trauma Lethality Posted by karlrehn

#5

Post by crazy2medic » Tue May 29, 2018 5:26 pm

My 2cents!
As a Paramedic, Cardiac Arrest secondary to blunt force trauma has a less than 1% chance at survival, in the field a Paramedic will pronounce you dead!
Government, like fire is a dangerous servant and a fearful master
If you ain't paranoid you ain't paying attention

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Re: Blunt Force Trauma Lethality Posted by karlrehn

#6

Post by lonestar144 » Tue May 29, 2018 9:07 pm

Yup. Don't know if it was here or another forum, but a retired (or off duty) officer got punched in the face one time and died as a result. Of course he was up in age, but could happen to anyone at any age. Good write and read.

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Re: Blunt Force Trauma Lethality Posted by karlrehn

#7

Post by AndyC » Wed May 30, 2018 10:17 am

There's something going on with Karl's website.

Last night when I was playing the above link from a Linux laptop, I was redirected to some crummy .tk website claiming that I was infected.

This morning on my work Mac, I was trying to get to http://blog.krtraining.com/muzzle-direc ... -a-reload/ for the upcoming class - and got a similar page.

Now, still on my Mac but in a Windows VM, I went to the first link and I get this:

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Re: Blunt Force Trauma Lethality Posted by karlrehn

#8

Post by Mike S » Wed May 30, 2018 10:21 am

AndyC wrote:
Wed May 30, 2018 10:17 am
There's something going on with Karl's website.

Last night when I was playing the above link from a Linux laptop, I was redirected to some crummy .tk website claiming that I was infected.

This morning on my work Mac, I was trying to get to http://blog.krtraining.com/muzzle-direc ... -a-reload/ for the upcoming class - and got a similar page.

Now, still on my Mac but in a Windows VM, I went to the first link and I get this:

Image
Same here, but from my phone. Pop up took me to the App Store & wanted me to download a new browser app.

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Re: Blunt Force Trauma Lethality Posted by karlrehn

#9

Post by oljames3 » Wed May 30, 2018 10:35 am

I've reported the phishing to Karl. I'll see him at the USPSA match at the A-Zone range this evening and will check with him.
Mike S wrote:
Wed May 30, 2018 10:21 am
AndyC wrote:
Wed May 30, 2018 10:17 am
There's something going on with Karl's website.

Last night when I was playing the above link from a Linux laptop, I was redirected to some crummy .tk website claiming that I was infected.

This morning on my work Mac, I was trying to get to http://blog.krtraining.com/muzzle-direc ... -a-reload/ for the upcoming class - and got a similar page.

Now, still on my Mac but in a Windows VM, I went to the first link and I get this:

Image
Same here, but from my phone. Pop up took me to the App Store & wanted me to download a new browser app.
O. Lee James, III Captain, US Army (Retired 2012), Honorable Order of St. Barbara
2/19FA, 1st Cavalry Division 73-78; 56FA BDE (Pershing) 78-81
NRA Distinguished Life Member (Disabled Vet), TSRA, NAR L1

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Re: Blunt Force Trauma Lethality Posted by karlrehn

#10

Post by ELB » Wed May 30, 2018 10:59 am

Charles L. Cotton wrote:
Tue May 29, 2018 1:43 pm
... Foreknowledge of the potential sequelae of blunt force trauma to the head can and should play an important role in your legal position and defense.

...

Chas.
I have wondered if I should have a three ring binder of "stuff I know" like this. Not just training certificates, but background knowledge that I've picked up along the way like blunt force trauma effects, articles on pre-attack indicators, documentation of my bum knee, bum elbow, and bum hearing (30% VA disability rating) that keep me from running (well, at least from running fast!), etc.
USAF 1982-2005
____________
The Most Interesting Texan in the World. :txflag:


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Re: Blunt Force Trauma Lethality Posted by karlrehn

#11

Post by karlrehn » Thu May 31, 2018 3:30 pm

For about 24 hours the blog.krtraining.com site was hacked and was pushing adware out. Fixed it as soon as I was aware of the problem.
Site is clean and back online again.

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