Transcript Hyb - Sean Wyatt

Extrication Concerns
Hybrid / Electric
SRS (airbags)
High Intensity Discharge (HID) lights
Hybrid and Electric Vehicles
• Have Parallel Electric Systems
• 12 Volt
• High Voltage DC + 110/220 AC
• 12V system controls: ignition, lighting, radio
• AC voltage is strictly for propulsion and other motorized
requirements (AC, power steering)
• WARNING A silent car is not necessarily off.
• Look at the dash/gages
• Turn Key off when possible
• KEY FACT 12V system controls relays in the high
voltage battery system. Removing 12V power opens
these relays and disables electric propulsion system.
Supplemental Restraint System
(SRS or airbag system)
Composed of four major components:
• Sensors
• Impact
• Speed
• Deceleration/ Accelerometers
• Processing Unit
• 12V Power system
• Airbags
SRS cont.
Basic Functionality
• Processing Unit causes one or more airbags to
discharge based upon sensor inputs.
• No single input can trigger a discharge
• Parked cars that are hit do not discharge airbags
• No accel/decel or speed input
• Sudden stop of itself does dot trigger airbag
• No impact
WARNING compressed gas cylinders remain a concern for
cutting. Peel before you cut.
KEY FACT Turning key off and disconnecting 12V safely
disables SRS airbag deployment.
HID Lights
• Same operation as Arc lights – Arc is generated across a
gas (xenon) that is excited by the arc
• Voltage is stepped up from 12V to 20,000V by the igniter
to ignite the arc and 85V from the ballast to keep it active.
• HID produce more light because the energy is released
as light and not heat.
• The voltage step up is similar to the process used by
tasers. Allows low volt power source (i.e. 9V battery) to
increase to 5000V.
KEY FACT HID lights are potential electrocution hazards
and fire/ignition hazards.
Takeaways
1. All vehicles on the road today have a 12V system
with a battery.
2. All systems of concern can be safely disabled by
removing the 12V battery from the circuit.
3. Hybrid Electric Vehicle concerns are reduced to
common concerns.
4. Slight variation in our current procedure can address
all concerns
MVC Procedure E9-1
First due apparatus
Key goals:
size up and scope of the incident
• Number of vehicles
• Number of patients
• Hazards (power, water, fuel, stability)
Scene safety / containment
determine need for extrication
stabilize vehicles
PT contact / prioritization (triage)
Extrication as needed
E9-1 En Route
• Determine approach options (if any)
• Determine personell roles (EMT = pt
care)
• Listen for updates and other
responding units
E9-1 On Scene
• DO and Officer discuss placement
• Park to protect the scene
• Size up for dangers that may increase distance (down
power lines/poles, hazmat, livestock, etc.)
• Determine priority vehicle for stabilization
• Individual roles
• Line selection
• Fully Packed up and on air before approaching vehicles
E91 D.O.
Park apparatus as decided
Engage pump
Engage compressor (autobalance or fixed)
Foam on
Open tank to pump and re-circ valves
Set wheel chocks
Start generator
Set Cones (if time)
Charge attack line when requested
Man the attack line when flow is established by nozzle.
When relieved, set cones and man engine.
E9-1 Crew Leader
On Scene Size up and establish IC as needed
Perform walk around of incident
all the way around if possible
check under vehicles
direct crew to place chocks
PT access as possible
Put vehicle in Park
Set emergency brake if possible.
Maximize PT access by using all electrical switches available (unlock
doors, pop hood and trunk, windows down. Move electric seats if
possible.
Turn key off – remove
Turn headlights off
Turn hazards on
Give crew OK to disconnect battery
Off air / doff packs if hazards clear
E9-1 Nozzle
Stretch chosen line to safe distance with optimal coverage.
Get line charged and verify flow.
Give hand line to DO
Retrieve small MVA bag from engine and any remaining
chocks/cribbing as needed.
Work with Tools/CL to stabilize, deflate tires
CL may divert to PT care
Get OK from CL to disconnect battery
Work with Tools to gain access to battery and disengage
If no battery access, clip wires from main fuse block
Confirm Hazards off
Doff packs?
Continue with extrication / tool deployment as needed
E9-1 Tools
Obtain Irons (halligan & axe)
Obtain step chocks and set on the primary vehicle
Work with Nozzle to get chocks set and tires deflated on all
vehicles.
CL may divert to PT care
When CL OK’s, gain access to Battery
Confirm hazards off
Doff packs?
Continue with tool deployment / extrication as needed.
Rescue 9-11
Second due apparatus
Park out of traffic and outside the scene or inside the scene
if access affords.
IC will direct to pack up or not
IC will direct to either PT care, extrication, or other needs
Most likely PT care
Bring forward med bags, backboards, towel rolls
Obtain the IC or CL plan for extrication, primary vehicle and
primary PT designation.
Command 9 (Officer POV)
Second or third due apparatus
Park to minimize traffic exposure and scene obstruction.
If first on scene, establish IC, size up, Consider 360?
If second On Scene assume IC
Get incident overview from CL
PT count
Extrication efforts and needs
Other needs
Safety concerns
What is the current plan and objective
Consider secondary survey for ejected or mobile PTs.
T9-5/ T9-4
Third or fourth due apparatus
Park to protect the scene and extend scene
If no extrication or PT care needs, set more cones and
assist with traffic control.