Repeat these movements deliberately and perseveringly twelve to fifteen times in every minute—thus imitating the natural motions of breathing. Continue the artificial respiration from one to four hours, or until the patient breathes; and for a while, after the appearance of returning life, carefully aid the first short gasps until deepened into full breaths.
Keep body warm with hot-water bottles, hot bricks to limbs and feet, and blankets over exposed lower part of body.
Rule 5.—Treat burn, if any. If skin is not broken, cover burn with cloths wet with Carron oil (equal parts of limewater and linseed or olive oil). If skin is broken, or raw surface is exposed, spread over it paste of equal parts of boric acid and vaseline, and bandage over all.
Conditions, Etc.—A shock produced by contact with an electric current is not of rare occurrence. Lightning stroke is very uncommon; statistics show that in the United States each year there is one death from this cause to each million of inhabitants. There are several conditions which must be borne in mind when considering the accidental effect of an electric current. The pressure and strength of the current (voltage and amperage) are often not nearly so important in regard to the effects on the body, as the area, duration, and location of the points of contact with the current, and the resistance offered by clothing and dry skin to the penetration of the electricity.
When the heart lies in the course of the circuit, the danger is greatest. A dog can be killed by a current of ten volts pressure when contacts are made to the head and hind legs, because the current then flows through the heart, while a current of eighty volts is required to kill a dog, under the same conditions, if contacts are made to head and fore leg. In a general way alternating currents of low frequency are the most injurious to the body, and any current pressure higher than two hundred volts is dangerous to life. On the other hand, a current of ninety-five volts has proved fatal to a human being. In this case the circumstances were particularly unfavorable to the victim, as he was standing on an iron tank in boots wet with an alkaline solution, and probably studded on the soles with nails, when he came in accidental contact with an industrial current. Moreover, he was an habitual drunkard. In an instance of the contrary sort, a man received a current of 1,700 volts (periodicity about 130) for fifty seconds, in one of the early attempts at electro-execution, without being killed. The personal equation evidently enters into the matter. A strong physique here, as in other cases, is most favorable in resisting the effects of electric shock.
High-pressure alternating currents (1,300 to 2,000 volts) are employed in electro-executions, and the contacts are carefully made, so that the current will enter the brain and pass through the heart to the leg. The two most vital parts are thus affected. In industrial accidents such nice adjustments are fortunately almost impossible, and shocks received from high-pressure currents, even of 25,000 volts, have not proved fatal because both the voltage and amperage have been greatly lessened through poor contacts and great resistance of clothing and dry skin, and also because the heart is not usually included in the circuit.
Death is induced in one of three ways: 1. Currents of enormous voltage and amperage, as occur in lightning, actually destroy, burst and burn the tissues through which the stroke passes. 2. Usually death follows accidents from industrial currents, owing to contraction of the heart, the effect being the same as observed on other muscles. The heart instantly ceases beating, and either remains absolutely quiet, or there is a fine quivering of some of its fibers, as seen on opening the chest in experiments upon animals. 3. A fatal issue may result from the passage of the current through the head, so affecting the nerve centers that govern respiration that the breathing ceases.
Symptoms.—These are generally muscular contractions, faintness, and unconsciousness (sometimes convulsions, if the current passes through the head), with failure of pulse and of breathing. For instance, a man who was removing a brush from a trolley car touched, with the other hand, a live rail. His muscles immediately contracted throwing him back, and disconnecting him from contact with the current (500 volts). He then fainted and became unconscious for a short time. The pulse was rapid and feeble, and the breathing also at first, but it later became slower than usual. On regaining sensibility the patient vomited and got on his feet, although feeling very weak for two hours. Unconsciousness commonly lasts only a few moments in nonfatal cases, but may continue for hours, its continuance being rather a favorable sign of ultimate recovery, if the heart and lungs are acting sufficiently. Bad after effects are rare. It is not uncommon for the patient to declare that the accident had improved his general feelings. Occasionally there is temporary loss of muscular power, and a case has been reported of nervous symptoms following electric shock similar to those observed after any accidental violence. Burns of varying degrees of intensity occur at the point of entrance of the current, from slight blisters to complete destruction of all the tissues.
Treatment.—The treatment is completely outlined in the "first-aid" directions. Should contact be unbroken, an order to shut off the electric current should at once be telephoned to the station. Protection of the rescuer with thick rubber gloves is of course the ideal safeguard.
In fatal cases the heart is instantaneously arrested, and nothing can be done to start it into action. If the current passes through the brain, by contact with the head or neck, then failure of breathing is more apt to be the cause of death. Theoretically, it is in the latter event only that treatment, i. e., artificial respiration, will be of avail.