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Question about the rear facing recommendations.....
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curliegirl
He's here!!!!
Member since 3/06 10128 total posts
Name:
Gina
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Question about the rear facing recommendations.....
The small amount I have read about the subject consistently references that a child is more safe in the rear facing position because of FRONTAL end crashes. What I read never referenced side impact or REAR end collisions.
So tell me, what is the advantage of having your child rear facing if you get slammed from behind? Doesn't the same issue apply with the head snapping forward?
Am I missing something completely? Is there THAT much research done that front end collisions are more prevalent than rear?
I would love any insight 
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Posted 8/11/10 10:11 AM  |
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EckoRed81504
We are complete <3
Member since 12/07 6299 total posts
Name:
April
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Re: Question about the rear facing recommendations.....
If you get hit from behind the force sends the child towards the front of the car-the carseat serves as a "wall". The child can't go anywhere.
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| Posted 8/11/10 10:14 AM |
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Kidsaplenty
Sister love
Member since 2/06 5971 total posts
Name:
Stephanie
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Re: Question about the rear facing recommendations.....
If a child is rear facing and your car it hit from the rear- its head will just go back into the car seat, not snap forward
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| Posted 8/11/10 10:16 AM |
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Porrruss
Nya nya nya
Member since 5/05 11618 total posts
Name:
Amy
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Re: Question about the rear facing recommendations.....
the speed your car is traveling in during a rear end collision is MUCH slower than front end- simply because most rear enders occur with the front car stopped. The child's head woudn't snap forward like that in a front end collision.
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| Posted 8/11/10 10:16 AM |
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tara73
carseat nerd
Member since 11/09 3669 total posts
Name:
Buttercup
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Re: Question about the rear facing recommendations.....
Rear facing also offers optimal protection in side impact crashes as well. Side impacts are considered the most dangerous type of crashes resulting in the most injuries
Getting rear ended is a whole different ball of wax in terms of crash dynamics, and most of these crashes are low speed impacts.
BUT, this explains it better than I ever could http://www.car-safety.org/rearface.html
-Statistics. According to Crashtest.Com, frontal and frontal offset crashes combine for about 72% of severe crashes. Side impacts are about 24%. Rear and rear offset crashes only account for about 4%. The NHTSA FARS database shows similar numbers. The odds of being in a frontal crash with a fatality or very serious injury are many times greater than being in a severe rear-end crash. Rear-enders are more common at lower speeds, though most injuries in these crashes are not as severe; typically whiplash injuries to adults, especially passengers lacking proper head restraint.
- Crash Energy. Vehicle speed is very important to the energy in a crash, even more important than vehicle weight. Frontal and frontal offset crashes are the most severe because they often happen with both vehicles traveling at high speeds in opposite directions. Rear and rear offset crashes, on the other hand, often happen at lower speeds. In many cases, one vehicle is stopped or nearly stopped, and the other hits it from behind at a relatively low speed. Other times both vehicles are traveling in the same direction at similar speeds when one is bumped from behind. Either way, the difference in the speed of the vehicles is usually much lower in rear end crashes, and so the energy in the crash will also be much lower. Lower energy means less chance of injury.
- Ride-Down Time. Child Passenger Safety advocates often stress the importance of "Ride-Down Time." This term simply refers to the time it takes for a person to come to a complete stop in a crash. This is important because the total force on the passenger increases with both the weight of the person and with the speed they were traveling before the crash. On the other hand, the total force on the passenger decreases significantly as the time it takes to stop increases. While we have often have no control of the speeds involved in a crash, we can do some things to help increase the time it takes for a passenger to come to a stop. As mentioned earlier, in a frontal crash the vehicles are often traveling in opposite directions at high speeds. When they crash, both vehicles stop very suddenly, in a small fraction of a second. Even a slight increase in this stopping time can reduce the risk of injury considerably. This is perhaps the most fundamental concept in keeping passengers alive in a crash.
Take the case of a child in a carseat. Ideally, you want the child coupled as tightly as possible to the harness system and carseat, and the carseat coupled as tightly as possible to the vehicle with the seatbelt or LATCH system. When you do this, the child gains all the benefit of "ride-down time" provided by the crushing frame of the vehicle in a crash. With a loose installation of any kind, the child gets less ride down time and suffers a more severe crash into the harness system. The analogy is that a tight installation is like catching an egg when you "give" backward with your hand to prevent it from breaking. A loose installation will be more like holding your arm and hand rigid when you catch the egg. The egg will splatter in your hand if you don't give, much like what happens to the internal organs of a person when they are flung into a loose seatbelt or harness. By giving with your arm, you cause the egg to slow down gradually, increasing its ride-down time. Vehicle frames, advanced seatbelts and airbags are all designed to help passengers slow down more gradually. Carseats themselves are not designed provide much ride-down time; their main functions are to prevent ejection and to allow the child to be coupled tightly to the vehicle so the frame can provide the necessary ride-down time.
Fortunately, rear-end crashes allow for a lot more ride-down time than frontal crashes. We already mentioned that the potential energy in a rear-end crash is usually lower than a frontal crash because the speeds involved are slower. In addition, the two vehicles are not usually moving toward each other like they would be in a frontal crash. That often means one vehicle is allowed to "give", and the overall ride-down times for both vehicles are much greater, meaning lower forces on the passengers.
- Forces and Area. We know that frontal and frontal offset crashes are more frequent, more severe and usually have less ride-down time than rear-end crashes. In such a frontal crash, it is easy to see why a rear-facing carseat is a better choice. The entire shell of the carseat cradles the child's back, neck and head. Some seats even have foam protection in the shell to cushion the child even more. The crash forces are spread throughout the large area of the child's back and head, reducing the pressure during the crash, and keeping the head from snapping backward with respect to the body. Unlike this rear-facing carseat, a child's legs and head are not restrained at all if they are turned front-facing. In a serious frontal crash with a front-facing carseat, the head and legs of the child are thrown forward like a rag doll, and serious forces are put on the child's spinal cord. In a front-facing carseat, only the harness couples the energy to the child's body. The smaller area of the harness means more pressure on the child. In the egg analogy, the egg is much less likely to break if it is caught using the whole padded area of your hand rather than with just a couple bony fingers.
Similarly, for the uncommon rear-end crash, a front-facing carseat may be safer than a rear-facing model. Still, rear-end crashes are much less common and much less severe than frontal crashes, and it is for that reason we choose to maximize the protection for a frontal crash instead. In addition, rear-facing carseats can also provide an added degree of safety in side-impacts. Rear-facing seats will usually protect the head from being thrown outside the shell of the carseat much better than a front-facing carseat in a frontal offset or side impact. Even a minor rear-end crash can be serious for front-facing adults without proper head restraints, but this is usually not an issue for children in properly fitted carseats and boosters.
- Physiology. For the reasons listed, rear-facing not only turns out to be safer for infants, but for people of all ages. In fact, we would all be safer rear-facing in cars, airplanes, trains and elsewhere. Of course, this would not be acceptable to most adults. Fortunately, adults are somewhat better able to withstand the forces on the head and neck in a severe crash when they are front-facing. Babies have very immature bones and connective tissue, and this is especially the case when they are younger than 1 year or under 20 pounds. For that reason, front-facing babies face a particularly serious risk of spinal cord injury in a frontal crash.
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| Posted 8/11/10 10:21 AM |
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curliegirl
He's here!!!!
Member since 3/06 10128 total posts
Name:
Gina
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Re: Question about the rear facing recommendations.....
Posted by tarabelle99
Rear facing also offers optimal protection in side impact crashes as well. Side impacts are considered the most dangerous type of crashes resulting in the most injuries
Getting rear ended is a whole different ball of wax in terms of crash dynamics, and most of these crashes are low speed impacts.
BUT, this explains it better than I ever could http://www.car-safety.org/rearface.html
-Statistics. According to Crashtest.Com, frontal and frontal offset crashes combine for about 72% of severe crashes. Side impacts are about 24%. Rear and rear offset crashes only account for about 4%. The NHTSA FARS database shows similar numbers. The odds of being in a frontal crash with a fatality or very serious injury are many times greater than being in a severe rear-end crash. Rear-enders are more common at lower speeds, though most injuries in these crashes are not as severe; typically whiplash injuries to adults, especially passengers lacking proper head restraint.
- Crash Energy. Vehicle speed is very important to the energy in a crash, even more important than vehicle weight. Frontal and frontal offset crashes are the most severe because they often happen with both vehicles traveling at high speeds in opposite directions. Rear and rear offset crashes, on the other hand, often happen at lower speeds. In many cases, one vehicle is stopped or nearly stopped, and the other hits it from behind at a relatively low speed. Other times both vehicles are traveling in the same direction at similar speeds when one is bumped from behind. Either way, the difference in the speed of the vehicles is usually much lower in rear end crashes, and so the energy in the crash will also be much lower. Lower energy means less chance of injury.
- Ride-Down Time. Child Passenger Safety advocates often stress the importance of "Ride-Down Time." This term simply refers to the time it takes for a person to come to a complete stop in a crash. This is important because the total force on the passenger increases with both the weight of the person and with the speed they were traveling before the crash. On the other hand, the total force on the passenger decreases significantly as the time it takes to stop increases. While we have often have no control of the speeds involved in a crash, we can do some things to help increase the time it takes for a passenger to come to a stop. As mentioned earlier, in a frontal crash the vehicles are often traveling in opposite directions at high speeds. When they crash, both vehicles stop very suddenly, in a small fraction of a second. Even a slight increase in this stopping time can reduce the risk of injury considerably. This is perhaps the most fundamental concept in keeping passengers alive in a crash.
Take the case of a child in a carseat. Ideally, you want the child coupled as tightly as possible to the harness system and carseat, and the carseat coupled as tightly as possible to the vehicle with the seatbelt or LATCH system. When you do this, the child gains all the benefit of "ride-down time" provided by the crushing frame of the vehicle in a crash. With a loose installation of any kind, the child gets less ride down time and suffers a more severe crash into the harness system. The analogy is that a tight installation is like catching an egg when you "give" backward with your hand to prevent it from breaking. A loose installation will be more like holding your arm and hand rigid when you catch the egg. The egg will splatter in your hand if you don't give, much like what happens to the internal organs of a person when they are flung into a loose seatbelt or harness. By giving with your arm, you cause the egg to slow down gradually, increasing its ride-down time. Vehicle frames, advanced seatbelts and airbags are all designed to help passengers slow down more gradually. Carseats themselves are not designed provide much ride-down time; their main functions are to prevent ejection and to allow the child to be coupled tightly to the vehicle so the frame can provide the necessary ride-down time.
Fortunately, rear-end crashes allow for a lot more ride-down time than frontal crashes. We already mentioned that the potential energy in a rear-end crash is usually lower than a frontal crash because the speeds involved are slower. In addition, the two vehicles are not usually moving toward each other like they would be in a frontal crash. That often means one vehicle is allowed to "give", and the overall ride-down times for both vehicles are much greater, meaning lower forces on the passengers.
- Forces and Area. We know that frontal and frontal offset crashes are more frequent, more severe and usually have less ride-down time than rear-end crashes. In such a frontal crash, it is easy to see why a rear-facing carseat is a better choice. The entire shell of the carseat cradles the child's back, neck and head. Some seats even have foam protection in the shell to cushion the child even more. The crash forces are spread throughout the large area of the child's back and head, reducing the pressure during the crash, and keeping the head from snapping backward with respect to the body. Unlike this rear-facing carseat, a child's legs and head are not restrained at all if they are turned front-facing. In a serious frontal crash with a front-facing carseat, the head and legs of the child are thrown forward like a rag doll, and serious forces are put on the child's spinal cord. In a front-facing carseat, only the harness couples the energy to the child's body. The smaller area of the harness means more pressure on the child. In the egg analogy, the egg is much less likely to break if it is caught using the whole padded area of your hand rather than with just a couple bony fingers.
Similarly, for the uncommon rear-end crash, a front-facing carseat may be safer than a rear-facing model. Still, rear-end crashes are much less common and much less severe than frontal crashes, and it is for that reason we choose to maximize the protection for a frontal crash instead. In addition, rear-facing carseats can also provide an added degree of safety in side-impacts. Rear-facing seats will usually protect the head from being thrown outside the shell of the carseat much better than a front-facing carseat in a frontal offset or side impact. Even a minor rear-end crash can be serious for front-facing adults without proper head restraints, but this is usually not an issue for children in properly fitted carseats and boosters.
- Physiology. For the reasons listed, rear-facing not only turns out to be safer for infants, but for people of all ages. In fact, we would all be safer rear-facing in cars, airplanes, trains and elsewhere. Of course, this would not be acceptable to most adults. Fortunately, adults are somewhat better able to withstand the forces on the head and neck in a severe crash when they are front-facing. Babies have very immature bones and connective tissue, and this is especially the case when they are younger than 1 year or under 20 pounds. For that reason, front-facing babies face a particularly serious risk of spinal cord injury in a frontal crash.
Thank you!!!!!!!
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| Posted 8/11/10 10:31 AM |
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curliegirl
He's here!!!!
Member since 3/06 10128 total posts
Name:
Gina
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Re: Question about the rear facing recommendations.....
Posted by Kidsaplenty
If a child is rear facing and your car it hit from the rear- its head will just go back into the car seat, not snap forward
This, to me, does not make sense......
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| Posted 8/11/10 10:32 AM |
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Re: Question about the rear facing recommendations.....
Posted by curliegirl
Posted by Kidsaplenty
If a child is rear facing and your car it hit from the rear- its head will just go back into the car seat, not snap forward
This, to me, does not make sense......
Me neither....the momentum is the same right???
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| Posted 8/11/10 10:45 AM |
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GoldenRod
10 years on LIF!
Member since 11/06 26792 total posts
Name:
Shawn
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Re: Question about the rear facing recommendations.....
Posted by CookieMomster
Posted by curliegirl
Posted by Kidsaplenty
If a child is rear facing and your car it hit from the rear- its head will just go back into the car seat, not snap forward
This, to me, does not make sense......
Me neither....the momentum is the same right???
No, it's not right. If your car is stationary (at a traffic light, for instance), and someone behind you doesn't stop at the light and rear-ends you, DC's head will remain stationary while their body (and the entire car) moves forward. This will give the same effect as if they were forward facing, and the car was in a frontal collision.
However, like mentioned above, rear-end collisions are much slower speeds than frontals, and the car being hit can "ride down" the impact by moving forward, dissipating a lot of the force.
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| Posted 8/11/10 11:19 AM |
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