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Safest Seat on a Plane, Or How to Survive a Crash
Ant writes "Popular Mechanics shares a short article on an exclusive look at 36 years' worth of National Transportation Safety Board (NTSB) reports and seating charts to determine the best way to live through a disaster in the sky. Move to the back of the Airbus."
Aortic dissection. This is what kills you. It's the most common, lethal deceleration injury. Of course if you're going fast enough you're simply crushed, but at "lower" speeds a sudden deceleration is enough to rotate the heart (which is fairly mobile in the chest) and rip it off the aorta (which is fixed to the posterior chest wall). The arteriovenous ligament doesn't help, either. So the aorta ruptures and you die of a cardiac tamponade. Oh and this is how Princess Diana died.
Seven puppies were harmed during the making of this post.
"Aortic dissection. This is what kills you. It's the most common, lethal deceleration injury. Of course if you're going fast enough you're simply crushed, but at "lower" speeds a sudden deceleration is enough to rotate the heart (which is fairly mobile in the chest) and rip it off the aorta (which is fixed to the posterior chest wall). The arteriovenous ligament doesn't help, either. So the aorta ruptures and you die of a cardiac tamponade. Oh and this is how Princess Diana died."
They wanted to install seats facing backwards in airplanes specifically to reduce the deaths from the initial crash. Howver, they determined that the flying public wouldn't accept rear-facing seats. Considering all the BS the flying public puts up with nowadyas, maybe its time to float the idea again.
Oh, another Princess Di joke - "I heard Princess Di was on the radio... And the dash. And the seat ..."
When you sit in the back, it takes longer to get off of the plane because you have to wait for all the bozos in front of you to fumble for their personal belongings. I'd say that a conservative estimate is an average of 5 extra minutes. So before your first expected crash, you'd waste 5 * 7,000,000 minutes, or 66 solid years waiting at the back of planes. So to save each life, you're essentially using up an entire lifetime standing hunched over watching old codgers wrestle with their suitcases. (It's actually much worse than that, because only a fraction of fatal crashes even have a difference in outcome between the front and the back. A lot of times, everybody dies and sitting in the back doesn't help anyway.)
Aortic dissection. This is what kills you. It's the most common, lethal deceleration injury. Of course if you're going fast enough you're simply crushed, but at "lower" speeds a sudden deceleration is enough to rotate the heart (which is fairly mobile in the chest) and rip it off the aorta (which is fixed to the posterior chest wall). The arteriovenous ligament doesn't help, either. So the aorta ruptures and you die of a cardiac tamponade. Oh and this is how Princess Diana died.
That's a good story. I wonder if it's true.
By a strange coincidence (only on Slashdot), I just went to a conference on aortic surgery. And I used to edit the Stapp Car Crash Conference Proceedings in the 1970s (great series) and I remember at least one article on aortic damage.
Bottom line: Most of the aortic damage in automobile collisions occurs to people who weren't wearing their seat belts. Those lap and shoulder belts (which the U.S. auto companies refused to install until 1967) really work well. You can thank Ralph Nader for saving about 25,000 lives a year. The auto companies also made steering columns that were positioned exactly right and strong enough to impale the driver's chest, often with a heart puncture. Thanks to Ralph Nader, they replaced them with a collapsable steering column around 1967.
Let's see the latest stuff, um, http://content.nejm.org/cgi/content/full/332/6/356 Smith MD et al, Transesophageal Echocardiography in the Diagnosis of Traumatic Rupture of the Aorta, N Engl J Med 1995 332:356-362. (Well worth reading; great X-rays.) 7 were not restrained, 2 were. Smith says:
Whaddya know, the poster has a point. Aortic trauma is still a major cause of automobile fatalties, usually but not always when people aren't wearing seat belts (Diana wasn't).
But wait, Smith also says,
I forget how to do the equations, but as I recall when a car collides against a solid barrier at 50mph, it has about 50 inches of crush space in which to come to a halt, and that comes to about 50g, which everybody told me is survivable. (One of you young whippersnappers can check my numbers.) John Paul Stapp tested it himself on his rocket sled and lived. But if you subjected 100 people to 50g, I don't know how many of them would get aortic rupture.
The other major cause of death (mostly to people who aren't wearing seat belts) is head injury. Thanks to Ralph Nader, those windshields are carefully designed with plastic laminate that has just the right elasticity to bring a passenger's head to a stop with low enough force to avoid breaking his