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最近我们对肾结石病人进行治疗,碰到一个问题,治疗不到5分钟,病人就感觉皮肤烫得受不了,把探头稍微放松一点,结果越来越烫,不能继续进行下去,为什么? 甘肃天水风动工具厂卫生所畅锺秀运用超声波进行治疗,如果使用声功率较大,常会碰到这个问题,这一方面可能因为目前生产的超声仪器大多采用锆钛酸铅陶瓷作换能器,在功率较大情况下较石英晶体更易发热,另一原因可能是因为在使用过程中没有很好涂耦合剂所致。我们知道,超声波的特征和光波非常相似,它也具有反射、折射、吸收、衰减等特性,当超声在介质内传播时会受到一定的阻力,我们把它称为声阻抗,这种阻力因介质的不同而有很大的差异,根据超声
Recently we treated kidney stones patients, met a problem, the treatment less than 5 minutes, the patient felt the skin can not stand hot, the probe a little relax, the result is getting hot, can not continue, why? Gansu Tianshui Pneumatic tool factory bathroom Chang Zhong show using ultrasound treatment, if the use of sound power is larger, often encounter this problem, this may be because the current production of ultrasonic instruments are mostly made of lead zirconate titanate ceramic as a transducer in the Power larger than the quartz crystal more likely to heat, the other reason may be because in the course of the application is not good due to the coupling agent. We know that the characteristics of ultrasound and light waves are very similar, it also has the reflection, refraction, absorption, attenuation and other characteristics of the ultrasound transmission in the media will be subject to certain resistance, we call it acoustic impedance, which resistance due to the media The difference is quite different, depending on the ultrasound