Thu, 2 Sep 2010|
In this extrication video, Dave Dalrymple shows you how to use a power hydraulic ram to expand crumpled vehicle compartments to more easily disentangle patients. Sponsored by Holmatro.
[MUSIC] [MUSIC] [SOUND] Welcome rescuers to Fire Engineering's Training Minutes. I'm Dave Dalrymple. What we're gonna be talking about today is a technique called cross ramming. Now maybe some of you are not familiar with cross ramming, you're familiar with our friend the power hydraulic ram. We've always the ram to push, to displace a dash, push it forward, push it up out of our way, so you're used to using a ram in that way. However, maybe you're not used to, and think about it. Think about the size of cars today. A lot of times, vehicles today, because of their inherent design, vehicles want to absorb energy. They kind of crush and get damaged. And they compress toward the passenger cell. But what happens when that crush, either from a side impact impacts into the passenger cell. Or, because of the severity of the damage, it actually intrudes into the passenger cell from the front or the rear. Many times our patients will be trapped in different ways than what we're used to. Well we might actually need to reproportion, push the car back out so to speak. And one of the best tools to use that is our friend the power hydraulic ram. Now we're going to show you a couple different ways to explore this today by not only pushing the vehicle out horizontally. But also vertically. And from a couple different positions and we'll show you how this can help you access and disentangle the patient better and safer. Okay rescuers one things to remember anytime we're working around roof posts or the roof itself. We always need to prep the interior of the vehicle. Now, part of that prepping job is going to be cutting seatbelts and displacing interior trim to look for airbag cylinders. [MUSIC] Now, you'll notice rescuers also. To protect the patient we will have inserted a piece of hard protection in that area between the patient and where the rescuer is doing the work. You see he's displaced the interior trim away. There's no airbag cylinders there. He's also looking because of it being a, the B post itself he's going to be looking for the adjustable seat belt bracket. Now rescuers, as part of the cross ramming evolution we need to actually place the ram in place. Now, what we need to do is, we need to figure out the distance we want to travel, what rams we have, and we need to make sure that we block each end of the ram. Cuz, think about the point of contact. The ram actually makes. The ram makes a very small point of contact so we're not, going to need to widen that out, either with cribbing or with a ram jam, or, or some other device like that. Now rescue, as you can see, the crew has come in, the ram is in place. They've extended it out. Now they're going to begin the cross raming evolution its self. Now think about as the ram extends and starts to move the vehicle we need to watch the ram its self, we need to watch our patients so none of the vehicle parts its self comes back onto the patient. As we take our time, we might need to reposition the ram, either higher or lower, on that roof post. A good ram to do this with. Is a telescoping ram where you can fit it into a tight space and will extend farther out than a normal set piece ram. So if you have a telescoping ram in your arsenal, that's a good choice here. [MUSIC] Okay rescuers. One of the things as you'll notice, we've had to re-adjust the ram. Now, sometimes when we need to readjust the ram, we also need to build up space, especially if we have a short ram and we need to go. A longer distance. Now the nice thing, and you notice, we've used our platforms from our quick chalks in there behind the ram jam and a wedge. So not only are they good for stabilizing the vehicle on its wheels, you also can utilize them for taking up space to insert our ram. Now as, as they extend the ram this time. And push the vehicle out. We have our pro, our hard protection in place to protect our patient and our interior rescuer. We have to also watch, we're gonna, reach a certain point were the B post is going to be out and it's gonna start to move the roof down which then we'll stop. And then reposition the RAM and actually push the roof up vertically. Now rescuers as we push the B post out, you notice that the roof itself has started to come down. That, that's a normal situation that's gonna happen as we push the side of the vehicle away. We're gonna need to reposition the ram to push the roof up vertically. Now cross-ramming, whether it's vertically or horizontally, we need to make sure we inch, we are talking to our interior rescuer to coordinate the efforts between the ram and patient management as we work. Rescuers, now that we've finished pushing the side of the vehicle away, cross ramming horizontally. Now we're going to cross ram the vehicle vertically by pushing the roof up with the ram. Okay rescuers, now that we've repositioned the ram to cross ram vertically, you'll notice we've placed hard protection both between the patient... [MUSIC] And also the lower part of the seat. We've put some scrubbing in place to ensure that the ram doesn't slide forward. Now you also notice regardless of whether we're cross ramming vertically or horizontally we also want to support the ram. So we're, here we supported the ram, the base to spread the base along the floor. So we can actually employ the ram to push the roof up with more force and evenly than push the floor down as well. [SOUND] [MUSIC] Now rescuers, besides using the, the cross ramming technique to reproportion the vehicle because of damage. What happens if this vehicle, say this vehicle, for example, was a brand new Volvo, say like an XC60, where all the roof posts are all filled with boron steel reinforcements. And your hydraulic cutter couldn't cut this roof posts. Well, we can also use the ram. And the cross ramming technique of cross ramming vertically by stretching the roof upwards to move the patient out of the back of the vehicle kind of a vehicle pick. However coming through the rear window opening because we're gonna stretch it vertically. Now as you can see. The crew's setting up the ram to do this. They're going to set up a base across the base of the ram to spread the load out. They're also going to tent the roof up vertically. [NOISE]. [MUSIC] Again, cross ramming is no more than we're gonna recreate, we're gonna kinda push the vehicle apart in directions to make better space to disentangle and remove patients in the vehicle. But always remember, you need to put a hard protection, a barrier, between your tool work. Your patient and the interior [UNKNOWN] You might need to pull interior trim if we're pushing against different parts of the roof because of side curtain air bags and such. But also remember support the ram, because the ram might punch through the vehicle as well. So we've got to make sure the ram is supported. My name is Dave Darable. I'd like to thank you for watching training minutes. Thank you Humatro for sponsoring them. Be safe out there.