等幅中频正弦电疗引起皮肤烧伤的动物实验初步报告

THE BURN CAUSED BY MEDIUM FREQUENCY SINUSOIDAL CURRENT—An Animal Experimental Study

本文通过在家兔腹、背部用不同的等幅中频正弦电流量及电极的不同放置办法进行实验,发现在电流量过大及电极不正常时可引起皮肤不同程度的烧伤并提出此种烧伤的性质为热烧伤。

The results of the animal experi- mental study of applying 2000Hz medium frequency on the abdomen or back of four rabbits were presented.It was pro- red harmlessness when the current den- sity was lower than 4mA/cm^2.4 to 6mA/cm^2 current density caused first degree burn of the skin.Second to third degree burn was induced when the current density was 6.5mA/cm^2.A 2nd degree burn would be caused when the density was over 4mA/cm^2,improper weided electrode or without padding. The local skin temperature differences were measured before and after the application of the current.The highest skin temperature change could be over 9.2℃.This result showed the injury was induced by heat due to unduely high current density and improper placed electrode.Based on this study,some preventive cautions of the injury were indicated.