【 Weak current College 】 on fire-fighting and rescue personnel to electrocution in rescue---Power By 【 China power house network 】

Due to the fire situation is rapidly changing, combined with the scene conditions, very prone to electric shock accident, occurs after the electric shock accident, can be of good help, often determines the fate of the wounded and sick. If the fire and rescue personnel have appropriate rescue technology, doing a-spot relief work, so that patients are properly handled, can greatly reduce the electrocution deaths of the wounded.

A mechanism of human risk of electric shock,
Electric shock generally refers to the power of direct contact with the human body or high-voltage power through air or other conductive media passes current through the human body caused by tissue damage and dysfunction and to place the heartbeat and respiratory arrest. The main body of the severity of the injury and the voltage and current strength, DC and AC, frequency or low, power time, contacts and current direction and the environment of the meteorological conditions, etc. Voltage up to 40V, human tissues that have the risk of injury, currents up to 10 ~ 20mA to make muscle contraction, 50 ~ 60mA can cause ventricular fibrillation. AC power makes muscle convulsion, continued to be the power of the "hold", so that the risk of electric shock, do not break the power, therefore its greater harm than DC.

Second, the human body in the form of common electric shock accident

1, single-phase electric shock. In neutral grounding system, the human body directly contact a phase power supply, electric current passes through the body from the firing line to the ground again, forming the circuit. Human bear voltage phase voltage 220V, this way the single-phase electric shock, fire, electric shock.

Phase 2, two electrical shock. The human body or its subsidiary articles at the contact of two FireWire, human bear voltage line voltage 380 Volt, the risk of electric shock.

3, arc light electric shock. Human too close to the power grid, although not directly, but high voltage electric shock cord may penetrate between the wires and the human body, the arc of the air, the body burns, serious may die.

4, the leakage current of electric shock. When combatants use extinguishing water gun or conductive, leakage current is also the risk of electric shock. Dry skin's resistance to 50000 ~ 1000000 Ω (ohms), moist skin resistance down to 1000 ~ 5000 Ω, damaged skin resistance only 300 ~ 500 Ω. If the skin moisture, water, the resistance will greatly reduce the leakage current is likely to cause serious harm.

5, causition. As a result of fire, wind, earthquake and other reasons make the high-voltage line breaking in, add-in is a great fault current, current in place around the ground produces a voltage difference, when the people close to the landing point, the two elements: the voltage between the bear foot, resulting in casualties.

3. electrocution after the human body may hurt

1. electrical injury when the body contact current light users immediately when a panic, dull and pale, contact muscle contraction, and dizziness, tachycardia and malaise. To appear in a coma, convulsions, ventricular fibrillation, heart beat and breathing stopped.

2, the electrical burns current in skin burns than at the entrance to the exit. Burns the skin appears grayish yellow Coke leather, Center of low depression, pain and swelling in and around no such inflammation. But the current path on soft tissue Burns often more severe.

3, lightning damage. When people struck by lightning, heartbeat and respiration is often immediately stop with myocardial damage.

4. on-site rescue measures

1. immediately cut off the power or the stick, bamboo, insulated from the patients from the power supply. Notably ordinary light switch cannot be used as a cut off the power supply measures because the light switch can only be cut off from a thread, FireWire may not have cut off. When the power switch off the electric shock locations distant, available insulated tools (insulation mat, insulated rubber boots, insulated gloves, insulating rods, insulated shear) will wire cutting or transformer on the breaker opened, cut the wires should be properly placed to prevent accidental contact.

When a live wire into electrocution users, available insulation objects will traverse, you can also use the drying clothes, towels, rope, and so screwed into the strap, set in a shock to me, pull it out.

2. spot first aid when shock is out of power, the combatants should shock the different physiological reactions, on-site emergency treatment. (1) an electric shock to sane, but the sense of being respiratory urgent, pale. This should be a shock to lie flat in place of quiet rest, do not touch ' walk, to ease the burden on the heart, and should closely observe breathing and pulse changes. (2) electrical shock, be sober, heartbeat, breathing stops or very weak respiratory, shall promptly make the airway open and mouth-to-mouth. If not timely for artificial respiration, hypoxia, thereby causing the heartbeat stops. (3) the risk of electric shock, heartbeat, breathing is stopped, and accompanied by other injuries, shall promptly be cardio-pulmonary resuscitation and then dealing with trauma, with electric shock of the cervical spine, when you open the airway, and should not give rise to the head backwards, so as not to cause high paraplegia. (4) when a person suffers from lightning, heartbeat, breathing does not stop immediately for cardiopulmonary resuscitation, a hypoxic cardiac arrest and death.

5. disposal considerations

1, combatants in rescue must pay attention to safety before the power failure does not directly in contact with the hands to prevent electric shock, the wounded.

2. rapid and lasting for emergency treatment. Practice shows that electric shock after 1 minute to start treatment, 90% have good effect; electric shock treatment after 6 minutes, 10% have good effect; electric shock 12 minutes where the likelihood of successful treatment. To be removed or taken to the hospital while still should be cardiopulmonary resuscitation requirements for effective aid.

3, could not be considered a very weak respiratory just doing press out on, because this kind of weak breathing no gas exchange.