Extensive facial damage caused by a blast injury arising from a 6 volt lead accumulator.
Low-voltage electrical injuries are relatively uncommon. Injury caused by flow of heavy current due to short-circuiting a low-voltage battery has not been described in the English literature. A 9-year-old boy connected two thin household electrical wires to the two terminals of a 6 volt (lead accumulator) battery and pressed the other two ends between his teeth. This resulted in a blast causing a compound comminuted fracture of the mandible and extensive tissue damage in the oral cavity. The low internal resistance of a lead accumulator (approximately 0.03 ohms) permits the flow of a heavy current (approximately 200 amps) when short-circuited. This instantaneously vaporises a minuscule portion of wire at approximately 2000 K resulting in a sudden rise of intraoral pressure to 30 kg cm-2 leading to tissue damage.
Delayed neurologic injury secondary to high-voltage current, with recovery.
A patient with delayed neurologic injury secondary to high-$$ with recovery, is presented. The mechanism of injury and pathopliysiology are felt to be either vascular or direct damage to the spinal cord. This case demonstrates the need for frequent, repeated neurologic examinetions of electrical inj
Electrical burns; pathophysiology and complications.
The authors review the pathophysiology and complications of electrical injuries. Such injuries can be categorized into direct electrical injuries, arc burns and flame burns. Each has a distinct appearance and prognosis. Nine patients with electrical injuries were admitted to the Toronto General Hospital over the 5-year period 1973 to 1978. All were men and the average age was 33 years. Five patients required amputation. In one patient a convulsive disorder developed 3 weeks after injury. One patient demonstrated peripheral nerve injury with complete axonal lesions of the right median and ulnar nerves; there was progressive full return of nerve function over 12 months. Direct electrical injury to nerves is usually transient and return of function can be expected unless there has been a concomitant thermal or mechanical injury. Language: en