|
Lightning injuries are injuries caused by lightning strikes. They result from three factors: * electrical damage. * intense heat. * the mechanical energy which these generate. While sudden death is common because of the huge voltage of a lightning strike, survivors often fare better than victims of other electrical injuries caused by a more prolonged application of lesser voltage.〔 The author tells of her slow recovery after being struck by lightning.〕 The treatment of lightning injuries is keraunomedicine. 〔(Chris Andrews - JOLR )〕 〔Andrews, C. J., 1995: Keraunomedicine: A discipline come of age. Annals of Emergency Medicine, 25, 543-545. This is possibly the first use of the term.〕 ==Cause== Lightning can strike or injure humans in four different ways: * Direct strike * 'Splash' from nearby objects struck * Ground strike near the person causing a difference of potential in the ground itself (due to resistance to current in the Earth), amounting to several thousand volts per foot, depending upon the composition of the earth that makes up the ground at that location (sand being a fair insulator and wet, salty and spongy earth being more conductive). * EMP or electromagnetic pulse from close strikes - especially during positive lightning discharges In a ''direct hit'', the electrical charge strikes the person first. ''Splash'' hits occur when lightning jumps to a person (lower resistance path) from a nearby object that has more resistance, striking the person on its way to the ground. In ''ground'' strikes, the bolt lands near the person and is conducted by a connection to the ground (usually the feet), due to the voltage gradient in the earth. This can still cause substantial injury. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Lightning injuries」の詳細全文を読む スポンサード リンク
|