使用凝胶模型法对经络生物物理特性的模拟研究

A Simulating Study of Biophysical Features along Meridians on a Gel Model

曾经在传统经脉线上发现多种生物物理特异性 ,为研究其机制 ,使用了物理模型法。在一个用琼脂制成的凝胶模型上用电阻丝加热制造一个溶胶通道 ,在凝胶中包埋多股金属丝 ,待凝固后抽出 ,再注入生理盐水 ,制成盐水通道。使用双压力传感器流阻仪对两种通道的流阻进行测定 ;使用 5 KHz恒流四电极方法对两种通道的阻抗进行测量 ;使用激振器在通道的一端产生一个约 5 0 Hz的振动 ,在通道另一端用晶体拾音器检测振动信号 ,对两种通道的声音传导特性进行了测定。结果表明 ,盐水通道可表现出低流阻特性 ,而溶胶通道没有低流阻特性 ;盐水通道和溶胶通道都可表现出低电阻抗的特性 ,而前者的低电阻更为明显 ;盐水通道有较好的声传导 ,而溶胶通道未显示出特异的声传导。结果提示 ,经脉线上的生物物理特异性可能是由于经脉线下的组织中含有较丰富并且连续分布的组织液 ,其主要成分为盐。

A physical model was used to study the mechanism of specific biophysical features along the classic acupuncture meridian lines. A sol channel within a gel bed was made by a resistance string heating during electrification. A saline channel was produced by withdrawing some fibers in the gel bed and injecting saline into the gaps. A hydraulic resistance instrument composed by two pressure transducers was used to measure the hydraulic resistance across the two kinds of channels. The impedance on both channels was measured by a four-electrode impedance instrument with 5 KHz constant current. A vibration generator was put on one set of the channel to produce about 50Hz sound waves. The signal was detected by a crystal pickup on the other set of the channel to examine the transmission of the wave along the two kinds of channels. The results showed that the low hydraulic resistance appeared on saline channel while no such feature on sol channel. Both channels showed low impedance while saline channel had more marked low impedance than control area. There was a better transmission of sound wave along saline channel while a bad transmission along the sol channel. The results suggest that the specific biophysical feature along meridians may be caused by a continuous rich distribution of interstitial fluid which mainly contains salt, water and protein.