We've all 'been there' with foot entrappments. Simply a variation of a common technique...Perform a dash lift with a spreader...Rather than 'block' under the rocker panel (thus under the lower spreader tip)...Allow the rocker panel to move downward and free the feet relying upon the A post for strength. Have you tried it? Did it work?
What is your most common technique for relieving this problem?
Interesting thought Rig. It might just work depending on where the foot is hung. I would say that it would work on a unibody vehicle a little better.
One of the problems that you are faced with when dealing with foot entrapment from a frontal collision, is that when the crumple zones that are built into the vehicle are working as they are designed, the crush energy is diverted in such a way that the engine and transmission are forced underneath the vehicle rather than into the passenger compartment.
this is saving lives but we are seeing more and more foot entrappment because of these factors.
When the front suspension is destroyed and crushed,tires puntured etc, the drivers and passengers front floor pan area is usually touching the ground leaving very little room to push the floor pan area down to release the feet.
For a two door vehicle:
To gain as much space a possible, you can make a relief cut near the lower A-pillar area near the rocker panel and another relief cut behind the drivers or passengers seat, place cribbing on the opposite side of the relief cut on the rocker panel behind the seat for strength. Insert a long ram vertically from the top of the roof rail to the rocker panel and push the area down the relief cuts made will contiune to tear the floorpan and push it down. Carefully watch the feet and body for any adverse effects as you are pushing the rocker panel,floor pan and seat down in one piece.
Four door vehicle:
Follow the same procedure but a relief cut will need to be made behind the B-pillar at the rocker and cribbing placed behind it also you need to cut the top of the B-Pillar to disconnect it from the roof prior to pushing with the ram, this method will allow the floor pan, rocker panel, seat and B-pillar to move down slowly and controlled in one continous motion.
You will find that if the patients knees are trapped by the dash board as well,
and as the floor is pushed down the knees will also be released, somthing like a reverse dash lift but instead of lifting the dash, we lower the floor. it's all about just creating space.
I will admit that with alot of vehicles being built lower to the ground because of areodynamics, there is not a lot of room anymore from the bottom of the rocker panel to the ground, but if all you require is a few inches, sometimes this procedure may be all you need.
Play around with this, see what else you can come up with and post the results. It's great when we can expand on a technique.
I have pictures of this procedure, I'll post them if I can find them
Speaking from experience this technique does work or I should say it worked for the one time we did it by accident.
Since your all confused now... I'll explain the details. The MVA was a normal car vs tree. We got the doors off, roof off, passenger seat back removed and center console removed all to find the driver still stuck by the emergency brake on his foot. There was no room to get in with the pedal cutter so we attempted to lift the dash with the spreaders to either get the pedal off or make room for the pedal cutter... heres where the accidental part comes in.
We blocked under the rocker like we normally would however it had rained like 6 inches in 2 days and when we opened the spreaders the block provided no resistance whatsover... it simply pushed down into the mud. The good part is it took the rocker down with it and rather then taking the pedal off of the top of the drivers foot, it took the floor out from under the foot and freed the driver like we planned it that way.
It was a learning experience in multiple ways. First being you need to spread the weight on muddy surfaces. We talk about this with struts, etc but we made the mistake of not factoring it in with the single 2 foot 4x6 we were using. Second, perhaps this could be done on purpose for foot entrapments.
After attempting to recreate it we feel that the only foot entrapment it will work on is one involving the emergency brake with the foot up against the a post area. We didn't get significant movement out of the floor area around the gas and brake pedals only close to the post/rocker area. The only thing you have to remember is you still need your relief cut at the bottom of the a post.
We had a brutal high speed small car vs 1/2 ton head on with heavy intrusion onto the deceased car driver's lower body. The car was in a snow filled ditch so blocking didn't do much as we tried a dash lift in the normal way. We already had the roof off so I climbed in the passenger side and placed the spreader between the center of the dash and the floor. As the dash lifted, the floor also pushed down far enough to release the victim. I'm not sure if this method is safe to do with a live patient. What are your thoughts? Has anyone else done this?
Posted by R. Johnson
Be careful with that practice. The Dayton Incident came to mind while reading your post. If you damage the airbag brain with the spreaders(especially with a live car) you could deploy a bag. Some of the airbag brains are under seats or under the center console.
In that Dayton incident, the computer happened to be right in them middle. However, it can just as easily be anywhere else, especially on the sides where we usually do dash lifting. Bottom line, pull trip and disconnect batteries ASAP.