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,特别是在五十年代,六十年代研究人体各部导电变化的报告日渐增多。我国也从六四年开始陆续见到这方面的报导。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 At the beginning of the 1920s, some people first studied the conductivity of the heart with AC power of 1.8-200 kHz and found that there was a change of conductivity with the contraction of the heart. Since then, some people have successively carried out biological and physiological studies in this field. Especially in the 1950s and 1960s, reports on the changes in the conductivity of various parts of the human body were increasing. Our country has also successively reported in this regard since the beginning of June, 1964. The majority of the material studies the conductive changes of the brain, limbs in the physiological and pathological states and is called the “blood flow diagram” or “resistance map” of the brain or limb. Observation of the lungs