Announcement

Collapse
No announcement yet.

Motorcycle accidents and traumatic brain injury

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    #16
    Originally posted by metronycguy View Post
    If i remember correctly motorcycle helmets are only rated and tested for for a 30 mph fall, bicycle helmets for 15mph, and many fail that test, even the priciest trek bicycle helmets had to be recalled.
    I got the following info from Snell's website. Snell tests helmets in a number of ways. For the impact test: "This test involves a series of controlled impacts where a helmet is positioned on a metal head form and then dropped in a guided fall onto various steel test anvils (Flat, Hemisphere, Kurbstone, Roll bar, Edge or a Horseshoe type) which simulate different impact surfaces. The head forms are instrumented with an accelerometer to measure peak G force or acceleration which is measured in "G"ravitational units. The impact energy (drop height and mass), or how hard the helmets are impacted is unique to each standard. However, in any valid test, if the peak acceleration imparted to the head form exceeds certain threshold value (around 300 G's, depending on standard and test type), the helmet is rejected."


    They only test an extremely low percentage and only test one size, and one model even though they may sell 20 models,19 will never get tested.
    Why not test all sizes? From "Final Report of Workshop on Criteria for Head Injury and Helmet Standards" at http://www.smf.org/docs/articles/hic/hic_workshop.pdf
    As for testing all sizes "Mr. Halstead added that NOCSAE did a body form data study, but this also was not published. This study found the head mass varied from 4.01 kg to 5.83 kg. This corresponds to the 4.1 to 6.1 kg range that EC uses in its testing standard. Snell uses a median 5.0 kg mass for its helmet testing, regardless of size. This enables more repeatability, and avoids having to alter the joules or the velocity according to head form mass. But does this testing approach diminish the protection for people with smaller or larger heads?

    Mr. Becker pointed out that smaller head size doesn’t always equate with smaller weight. Indeed, a study done at Tulane suggests cubic size measurements of heads do not correlate with their weights, he said. Mr. Halstead added that there is not much variation in head mass in adults and the real variation comes from comparing children to adults. Since the focus of the conference was adult helmets, varying helmet mass was not such a critical issue. But Dr. Thomas noted that it would help for crash test helmet testing if everyone used the same helmet forms. The US Government uses the DOT head forms for their testing, whereas most other organizations use ISO head forms."

    As for the number of models tested, again from the Snell website:
    "For qualification testing, helmets shall be in the same condition as those offered for sale. No helmet or component which has been subjected to any tests described in this Standard shall be offered for sale after testing. At least five (5) and as many as seven (7) complete helmets must be submitted by the manufacturer for a certification test program for each distinct structural configuration of the models offered for sale. All but one of these samples will be destroyed in testing; the untested sample shall be retained for comparison and reference. If different fit pad configurations are planned in order to accommodate this head gear for different size ranges, five of the samples submitted must be configured for the largest size range. If seven samples are considered necessary, the remaining two samples must be configured for the smallest intended size. Additional samples representing different fit pad configurations may also be provided at the discretion of the submitter.

    In addition to the certification testing, the Foundation will routinely obtain and test samples of previously certified models. These samples will be selected from among those stocks intended for retail sale to consumers. In this manner, the Foundation will attempt to ensure that the helmets made available to the public continue to meet the performance requirements of this Standard.

    For those cases in which helmets are provided directly to users and do not pass through a normal sales distribution system, the Foundation will set up alternative procedures to monitor certified products. Specifically, if helmets are provided directly to teams or individuals for use in events, the Foundation must have access to the helmets for spot checking and non-destructive evaluation."

    Bicycle helmets do not and were never designed to prevent/reduce concussions, and that is from a non motor vehicle involved fall/crash, Forget about having another vehicle involved! That info is from the helmet makers, i believe that goes for for motorcycle helmets too.

    Football helmets which are much thicker and absorbing than bike helmets , do not prevent concussions, were not designed too. There is a new one by riddel out that is designed to prevent concussions, but it is not gaining acceptance since it is at least twice as thick.

    Motorcycle Helmets may help your head from deep road rash , torn off face, but they also tend to break your neck,especially if you hit teeth /chin first like that #1 football player did on a motorcycle,
    "It is important to realize that a lot of product type testing like helmet testing does not seek to precisely reproduce real life situations, rather it attempts to define a set of requirements that is analogous to the types of situations that might be encountered while engaged in a prescribed activity. Helmet tests are designed to be repeatable, measurable and include a fixed range of situations a helmet might reasonably encounter. At this point the concerns of helmet testing does not include responses of the neck or body as they react with the head during a crash. It is strictly a measurement of how a helmet reacts during an event to protect the wearer's brain. At Snell we believe that as technology continues to evolve, so should helmet design and manufacturing techniques."


    The Snell Memorial Foundation, Inc. is a not-for-profit organization dedicated to research, education, testing and development of helmet safety standards. Since its founding in 1957, Snell has been a leader in helmet safety in the United States and around the world.


    Here's the link to their homepage for those who are interested http://www.smf.org/home

    Comment


      #17
      Originally posted by Wise Young View Post
      Oy, you had a GCS (Glasgow Coma Scale) classification of 4? http://en.wikipedia.org/wiki/Glasgow_Coma_Scale

      Wise.
      I just saw this Wise, They said mine was a #4 and by the looks of that scale could have been ALOT worse!!!
      Thanks!

      Comment


        #18
        [. At this point the concerns of helmet testing does not include responses of the neck or body as they react with the head during a crash. It is strictly a measurement of how a helmet reacts during an event to protect the wearer's brain. At Snell we believe that as technology continues to evolve, so should helmet design and manufacturing techniques."
        [I]

        concussion is an aspect of brain damage, no if
        's or buts.

        if the design of the helmet changes a low-level i minor injury to a broken neck inducing a SCI , that is not a good choice, it wold be better to use a soft leather helmet or spend the money investigating materials that change from soft to rock hard ,which some companies are.
        i believe snell were designed for race cars, not motorcycles.
        the anvil test , is the same as they use on bicycle helmets. on bicycle helmets they do not alter the impact area it is the same every time. The shape of theobjrct it is dropped on is changed .
        I do not think snell test their helmets on the side , the lateral areas, which is where for motorcycle and bicycle , that is where the first point of impact is. They only test in one certain spot, and when helmet manufacture know that the spot where it is being dropped on is X , will always be X , will never be 4 inches from X , or any place but X. I would think that if they are mass-produced, the whole process would be designed to pass the X anvil drop test.
        Also if the helmets were designed for race car use, there are so many other safety factors built into the car, or removed from the car , so they do not injure the driver, a race car is a controlled enviroment , compared to a motorcycle. The way a drive is strapped into a race car , the strength ofthe roll cage i am sure the drivers body stays in place until released, and his head and helmet are relative stable compared to a motorcycle rider.
        i don't think snell has anything on other motorcycle helmet manufacturers, and in fact may be inferior since it sounds like they are using 1960's technology , and hiding behind 1960's technology, but spinning it like it better, while negating the fact that a poor design of a helmet or very likely the strapping system can cause a spinal cord injury , where a helmet less rider may get a broken jaw or teeth knocked out. i am sure many here would pick missing teeth if their injury fell into that category.
        Forget about bicycle helmets, they are just money makers for the styrofoam people. The producers know how ist will fal and the height , i am sure both motrcycle and bicycle designers/engineers can weigh the helmet so if falls exactly on X
        As long as the feds in charge of toys are the ones in charge of making the rules for life saving equipment for adults riding bikes, and still keeping the 1960's anvil test, i spite of the informed peoples knowlege of what a crock it is, you have toy helmets.

        i dont know how many times i have heard people state that their bicyclr helmet or motorcycle hemmet prventd a concussion lor the opposite, where even the helmet manufactures now admit they do not prevent concussions nor are they designed to do so. I am*sure*that*concussion*admission*is*the*result*of *many*lawsuits.*I**lso*notice*that*a*lot*of*the*bi cycle*lawsuit*settlements*have*a*strict*and**total *"no*Comment"*clause*built*into*the*settlements .*
        cauda equina

        Comment


          #19
          I had a bike helmet on. got a pretty bad concussion.
          the helmet was Styrofoam with a thin plastic skin and it was cracked through where I hit the road.

          I still get things like milk shake and milk crate, chicken and kitchen, mixed up.
          I cant see music notation, the dots swim along the horizontal lines, and I can still see the dots when I look away from the paper. someone had stolen my helmet the day before, and a coworker went over to walmart and bought me one. I was going to get another when I got paid. I don't know about fate, but intuition and premonition well, there must be something to that. helmets were a requirement at every horse barn I worked at after 1990. I say wear em if at all indicated.

          Comment


            #20
            Originally posted by metronycguy View Post
            [. At this point the concerns of helmet testing does not include responses of the neck or body as they react with the head during a crash. It is strictly a measurement of how a helmet reacts during an event to protect the wearer's brain. At Snell we believe that as technology continues to evolve, so should helmet design and manufacturing techniques."
            [I]

            concussion is an aspect of brain damage, no if
            's or buts.

            if the design of the helmet changes a low-level i minor injury to a broken neck inducing a SCI , that is not a good choice, it wold be better to use a soft leather helmet or spend the money investigating materials that change from soft to rock hard ,which some companies are.
            i believe snell were designed for race cars, not motorcycles.
            the anvil test , is the same as they use on bicycle helmets. on bicycle helmets they do not alter the impact area it is the same every time. The shape of theobjrct it is dropped on is changed .
            I do not think snell test their helmets on the side , the lateral areas, which is where for motorcycle and bicycle , that is where the first point of impact is. They only test in one certain spot, and when helmet manufacture know that the spot where it is being dropped on is X , will always be X , will never be 4 inches from X , or any place but X. I would think that if they are mass-produced, the whole process would be designed to pass the X anvil drop test.
            Also if the helmets were designed for race car use, there are so many other safety factors built into the car, or removed from the car , so they do not injure the driver, a race car is a controlled enviroment , compared to a motorcycle. The way a drive is strapped into a race car , the strength ofthe roll cage i am sure the drivers body stays in place until released, and his head and helmet are relative stable compared to a motorcycle rider.
            i don't think snell has anything on other motorcycle helmet manufacturers, and in fact may be inferior since it sounds like they are using 1960's technology , and hiding behind 1960's technology, but spinning it like it better, while negating the fact that a poor design of a helmet or very likely the strapping system can cause a spinal cord injury , where a helmet less rider may get a broken jaw or teeth knocked out. i am sure many here would pick missing teeth if their injury fell into that category.
            Forget about bicycle helmets, they are just money makers for the styrofoam people. The producers know how ist will fal and the height , i am sure both motrcycle and bicycle designers/engineers can weigh the helmet so if falls exactly on X
            As long as the feds in charge of toys are the ones in charge of making the rules for life saving equipment for adults riding bikes, and still keeping the 1960's anvil test, i spite of the informed peoples knowlege of what a crock it is, you have toy helmets.

            i dont know how many times i have heard people state that their bicyclr helmet or motorcycle hemmet prventd a concussion lor the opposite, where even the helmet manufactures now admit they do not prevent concussions nor are they designed to do so. I am*sure*that*concussion*admission*is*the*result*of *many*lawsuits.*I**lso*notice*that*a*lot*of*the*bi cycle*lawsuit*settlements*have*a*strict*and**total *"no*Comment"*clause*built*into*the*settlements .*
            Although I tend to agree with you abouthe bicycle helmets, the Motorcycle helmets are tested to snell and or dot standards. snell isn't a brandof helmet is is an accreditation company that tests the helmets just like DOT. What's more I checked them out prety thoroughly when I bought my first helmet and their tests are a pretty good test for how the helmet is likely to perform when invoplved in areal world bike crash. Realistically a motorcyclehelmet only needs to protect you head from the damage you would receive from falling from about 5 feet up and hitting your head. Anything else is unlikely to really matter very much. as far as saving your life. I would never wear anything except afull face helmet though either.

            Comment

            Working...
            X