Vehicle rescue instructors should remind participants in your training classes, especially if they are EMS-oriented responders, about how they can ‘read’ a seatbelt pretensioner system and may be able to get a sort of second opinion about whether their patient was or was not wearing their seatbelt.
Our scenario is that the frontal airbags have deployed. An airbag spiderweb is evident on the passenger’s side of the windshield. As you get closer, we see no spider web on the windshield on the driver’s side; this is a good thing.
Now how can we ‘read’ the seatbelt pretensioner system to see who was or was not wearing their seatbelt? There is some evidence the pretensioner system may reveal that can help us verify what we find when we make patient contact.
A common design of seatbelt pretensioner is integrated into the take-up spool of the seatbelt recoiler. With the trim removed, we can clearly see the actual pretensioner unit of this specific vehicle at the recoiler mounted to the base of this B-pillar. Also note the familiar yellow color wiring sheath that is the most common color used by automakers to identify airbag and pretensioner wiring circuits.
As we look at the empty driver’s seat in our scenario, we can confirm that the driver occupant of this vehicle was wearing their seatbelt when the crash occurred. Why do we know this and how can the pretensioner system tell us?
Pretensioners mounted to the recoiler unit typically lock the recoiler so it will not retract after the pretensioner deploys. The slack in the belt as shown here, once it is unbuckled, is your clue that it deployed while being worn by the occupant. It will not retract due to the take-up recoiler locking so it had all kinds of slack in it when the driver took it off.
On the passenger side however, since this seatbelt was not bucked at the moment of the crash, you would see that it is now drawn tight along the inside of the B-pillar. Either no occupant was here or if there was a passenger, this occupant was unbelted at the time of the collision.
‘Reading’ a seatbelt pretensioner system might just be a good “second opinion” for you to note when you are assessing mechanism of injury for your patients. My experience has been that the intoxicated patients tell you they were always wearing their seatbelt. With pretensioners, you’ve got something else to help you assess if they are telling you the truth or stretching their law-abiding status a bit.
Courtesy of Rob Moore from University of Extrication
Large Animal Rescue
Working with their past experince, the Patterson Fire Department’s completed their 4th horse rescue in the past several years.
Per the post from the Patterson Fire Department’s Facebook page:
At 0732, 25th of August 2021, the Patterson fire department was dispatched for a public assist to a local farm. Patterson’s heavy rescue, 22-6-1, arrived on scene and found a 31-year-old male horse, named “Dozer”, in distress. He had apparently fallen and managed to get himself stuck between a rock and a fence line. At first, the crew attempted to assist the horse in getting up by shifting his position. It became apparent that additional equipment was going to be needed to help Dozer out since he had become too exhausted to get up on his own. After some discussion, it was established that the best plan of action was to use a Paratech bipod system. It would be used as an artificial high directional with TU-32 griphoist’s assistance to lift the horse up. With a lot of sweat and effort, the crew was able to lift the horse up onto his feet. After some much-needed fluids and rest, we were happy to see Dozer trot away, unassisted.
An interesting fact, this is Patterson Fire Department’s 4th horse rescue in the past several years, all with successful outcomes.
Photos below from Andrew Akin
Rescue Methods BGSU 2021 Rescue Tech Series
These courses are NFPA compliant and covers all six disciplines of technical rescue operations. Students will utilize the latest and greatest equipment and will put learned skills to the test in intense hands-on scenarios.
General information on the Certified Rescue Technician Program.
- Rope Rescue Technician
- Water Craft Ops / Swift Water Ops
- Confined Space Technician
- Vehicle & Machinery
- Trench Rescue Technician
- Structural Collapse Operations
Rescue Methods BGSU 2021 rescue tech series with structural collapse ops.
Motor City Monday Extrication Tip; Electric Vehicle Battery Pack Reinforcements
As vehicles change, our knowledge must continue to keep pace and expand our mental toolbox. The extrication tool manufacters have kept pace with their cutters, spreaders, and rams to combact these strong steels. It’s our job to stay
Electric Vehicle Battery Pack Reinforcements
Like everything in life, vehicles are changing, well vehicles keep changing. World leaders are pushing green vehicles which will increase our interactions with electric vehicles. First off, let’s look at the common acronyms of several common green and traditional vehicles.
- BEV = Battery Electric Vehicle
- PHEV = Plug-in Hybrid Electric Vehicle
- HEV = Hybrid Electric Vehicle
- ICE = Internal Combustion Engine
Unlike BEV, PHEV, and HEV, the term ICE refers to the engine itself, rather than the type of car. Normal/traditional gasoline and diesel cars have internal combustion engines.
Electric Vehicles present several challenges to firefighters with battery fires leading the way. The automakers are designing and engineering extremely strong protective cages around battery packs. We are no strangers finding boron, martensite, and press hardened steels in the pillars, roof rails, and fender wells. However, in a BEV, the rocker panels and cross vehicle reinforcements will have boron and martensite steels to protect the battery pack from collisions that could comprise it. In the images below, the 2021 Ford Mustang Mach E has this strong steel in the rocker panels and cross vehicle reinforcements. The automakers can tie in the strong rocker panels into the front fender wells requiring us to make deep cuts during a dash lift or roll.
The image below shows the different testing vehicles are subjected to and a strong battery cage can not only protect the battery pack, but also the occupants of the vehicle.
As vehicles change, our knowledge must continue to keep pace and expand our mental toolbox. The extrication tool manufacturers have kept pace with their cutters, spreaders, and rams to combat these strong steels. It’s our job to stay current where the automakers are using strong steel.
Images from several Great Designs in Steel (GDIS) 2021 Presentations.