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二十年代初首先有人用1.8～200千赫的交流电研究心脏的导电性,发现随心脏舒缩有导电性变动。此后有人陆续进行这方面的生物学、生理学研究,特别是五十年代、六十年代研究人体各部导电变化的报告日渐增多。我国也从1964年开始陆续见到这方面的报道,材料多数系研究脑、肢体在生理和病理状态下的导电变化,并称之为脑或肢体的“血流图”或“电阻图”。对肺的观察材料甚少,国内尚未见有报道。本文称“血图”或“血容图”,因它是通过观察研究机体某部位血液容积波动情况而协助诊断鉴别疾病的一种方法。
In the early 1920s, some people first studied the electrical conductivity of the heart with alternating current of 1.8 to 200 kHz and found that there was a change in conductivity with relaxation and contraction of the heart. Since then, some people have successively carried out biological and physiological studies in this field. In particular, reports on the conductive changes in various departments of the human body in the 1950s and 1960s have been increasing. Since 1964, our country has also seen the reports in this area. Most of the materials studied the conductive changes of the brain and limbs under the physiological and pathological conditions and called “blood flow diagrams” or “resistance diagrams” of the brain or limb. Little observation of the lung material, there have been no reports of domestic. This article called “blood map” or “blood map”, because it is by observing the body of a part of the blood volume fluctuations to assist in the diagnosis of disease identification method.