warning: sensitive content, case study

Jennifer mom to my 7 · Jan 9, 2011

Was this ever posted here?

http://www.unece.org/trans/doc/2008/wp29grsp/CRS-04-07e.pdf

And is the UK stepping it up? I hear that the word is slowly trickling through Germany.

Jennifer mom to my 7 · Jan 9, 2011

ooh, look what I found. I am sure it has been posted, but...

Transport Canada DID do a crash test study with the 6 year old hybrid III dummy, in a harnessed seat (over the Canadian weight limits), a regular high back booster, and a high back booster latched and? tethered. (and the 10 year old and 5% female, comparing also front and rear seats in the vehicle).

Interesting.

http://www-nrd.nhtsa.dot.gov/pdf/esv/esv19/05-0258-O.pdf

Conclusion was that the neck loads were elevated, but the overall injury risk couldn't be determined.

Carrie_R · Jan 9, 2011

I've never seen it before - thanks for posting. I got all excited that we might see some change over there... and then saw that the date was June 2008.

I want to look at the Canadian study too, but that will need to wait until tomorrow.

babyherder · Jan 9, 2011

Makes me really really glad I found this site.

hrice · Jan 9, 2011

I am eternally thankful for the wonderful advice and guidance offered by c-s.org. When I cam on I had just turned my 16 month old (you know because his legs were squished). I quickly learned that I needed to RF him again. I also had just taken my 8year old out of his booster. I had no idea about the 5 step test.

So thank you everyone. With what I've learned I've been able to help so many others.

Minnesota · Jan 9, 2011

Wow, that was a very interesting (and devastating) read.

Thanks for bringing it over here, I think there is a lot to be learned from that, and it's upsetting to know that in the nearly three years since that was published, it doesn't seem that there have been any changes made over there.

snowbird25ca · Jan 10, 2011

The Canadian study certainly seems to support harnessing of children in the age 4 to 6 yr age group. I've read it before but it's definitely been awhile since I've read it.

I found this comment interesting:

"k. In a 2002 study Sherwood et al conducted sled testing with the Hybrid III 6-year-old dummy and compared the responses to a cadaver test. The authors concluded that the stiffness of the dummy spine contributed to high neck forces and moments that were not representative of the injury potential."

However, while loads may be lower overall, it's likely that they are still equal. If anything I'd expect a more accurate measurement to reflect higher loads to the boostered dummy especially in those cases where the shoulder belt slipped off the shoulder and the dummy's torso went forward further than it otherwise would've.

If neck forces are pretty much equal between booster and 5pt harness, but there is less force on the chest in the 5pt harness, then it seems to support harnessing possibly being preferable to a booster in that age group, and if nothing else definitely no increased risk.

I do find it concerning to see the lapbelt still riding up in to the abdomen of the 5th percentile female dummy.

hrice · Jan 12, 2011

Anyone know what happened to the link? I can't get it to work and wanted to share it:shrug-shoulders:

rachelandtyke · Jan 12, 2011

The first link? I just tried it and it worked for me.

hrice · Jan 12, 2011

I am using Google Chrome. Maybe thats the issue?

Minnesota · Jan 12, 2011

hrice said:
I am using Google Chrome. Maybe thats the issue?

I'm using Chrome and I just opened it without a problem.

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