Emergency response
Despite lock-out/tag-out procedures and multiple repetitions of
electrical safety rules in industry, accidents still do occur. The
vast majority of the time, these accidents are the result of not
following proper safety procedures. But however they may occur, they
still do happen, and anyone working around electrical systems should
be aware of what needs to be done for a victim of electrical shock.
If you see someone lying unconscious or "froze on the circuit,"
the very first thing to do is shut off the power by opening the
appropriate disconnect switch or circuit breaker. If someone touches
another person being shocked, there may be enough voltage dropped
across the body of the victim to shock the would-be rescuer, thereby
"freezing" two people instead of one. Don't be a hero. Electrons
don't respect heroism. Make sure the situation is safe for you to
step into, or else you will be the next victim, and nobody
will benefit from your efforts.
One problem with this rule is that the source of power may not be
known, or easily found in time to save the victim of shock. If a
shock victim's breathing and heartbeat are paralyzed by electric
current, their survival time is very limited. If the shock current
is of sufficient magnitude, their flesh and internal organs may be
quickly roasted by the power the current dissipates as it runs
through their body.
If the power disconnect switch cannot be located quickly enough,
it may be possible to dislodge the victim from the circuit they're
frozen on to by prying them or hitting them away with a dry wooden
board or piece of nonmetallic conduit, common items to be found in
industrial construction scenes. Another item that could be used to
safely drag a "frozen" victim away from contact with power is an
extension cord. By looping a cord around their torso and using it as
a rope to pull them away from the circuit, their grip on the
conductor(s) may be broken. Bear in mind that the victim will be
holding on to the conductor with all their strength, so pulling them
away probably won't be easy!
Once the victim has been safely disconnected from the source of
electric power, the immediate medical concerns for the victim should
be respiration and circulation (breathing and pulse). If the rescuer
is trained in CPR, they should follow the appropriate steps of
checking for breathing and pulse, then applying CPR as necessary to
keep the victim's body from deoxygenating. The cardinal rule of CPR
is to keep going until you have been relieved by qualified
personnel.
If the victim is conscious, it is best to have them lie still
until qualified emergency response personnel arrive on the scene.
There is the possibility of the victim going into a state of
physiological shock -- a condition of insufficient blood circulation
different from electrical shock -- and so they should be kept as
warm and comfortable as possible. An electrical shock insufficient
to cause immediate interruption of the heartbeat may be strong
enough to cause heart irregularities or a heart attack up to several
hours later, so the victim should pay close attention to their own
condition after the incident, ideally under supervision.
- REVIEW:
- A person being shocked needs to be disconnected from the
source of electrical power. Locate the disconnecting
switch/breaker and turn it off. Alternatively, if the
disconnecting device cannot be located, the victim can be pried or
pulled from the circuit by an insulated object such as a dry wood
board, piece of nonmetallic conduit, or rubber electrical cord.
- Victims need immediate medical response: check for breathing
and pulse, then apply CPR as necessary to maintain oxygenation.
- If a victim is still conscious after having been shocked, they
need to be closely monitored and cared for until trained emergency
response personnel arrive. There is danger of physiological shock,
so keep the victim warm and comfortable.
- Shock victims may suffer heart trouble up to several hours
after being shocked. The danger of electric shock does not end
after the immediate medical attention.
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