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‘Reading’ the Seatbelt Pretensioner

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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

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Training

Outboard Motor Information

The Pennsylvania Helicopter Aquatic Rescue Team shared the video below on their Facebook page of useful information on outboard motor.

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Outboard Motor

The Pennsylvania Helicopter Aquatic Rescue Team shared the video below on their Facebook page of useful information on outboard motor.

The Pennsylvania Helicopter Aquatic Rescue Team has a great Standard Operating Guidelines and Training Manual.

https://www.fishandboat.com/Boat/PennsylvaniaWaterRescue/Pages/default.aspx

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Heavy Rescue

ALBERTA Advanced Heavy Rescue Symposium

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Sept 22-23, 2017 Advanced Heavy Rescue Symposium at the CFD Training Academy registration forms ready to be sent out, email me if your interested. Only 60 spots available.

 

 

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Air Monitoring

Lifting Lockers

Have you walked thru your local school and thought that the lockers could fall on someone?

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Outside the Box

The lifting maze training props that made the rounds across social media last year could use a little updating after looking at the pictures from the rescue call that the Medway Fire Department responded to. If you look at the pictures, the lockers appear to be several sections of lockers attached together. Lifting all the lockers as one unit may not be possible.  A scenario like this will require more cribbing that a large rigid object.

Location

The custodial worker was pinned under the lockers in a second-floor hallway.  This type of rescue will require a large cache of equipment.  Consider the your plan A and plan B lifting tools.  Airbags and battery powered extrication tools are easily deployed inside a building.  If plan Z was to run a gas powered tool do you have ventilation setup along with air monitoring to ensure the patient and rescuers are not put in danger?

Weight

After a quick web search I found that the average 5-6 feet tall, 3 locker section weighs around 175 lbs.  Looking at the pictures, it looks like 3, 3 locker sections fell on the worker.  However, the contents of the lockers is the unknown.  The lockers could be empty or full of textbooks and other items.

Closing Thoughts

Strong work by the Medway, Norfolk, Millis and Bellingham fire departments freed the pinned worker.  This is another one of those calls that could happen anywhere.  Nearly every school has lockers lining the hallways.  Often, the hallways do not have easy access to the outside of the building and the parking lot.  Keep that in mind because all the equipment will have to be carried in.

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