Hálek J
Department of Medical Biophysics, Biometrics and Informatics, Faculty of Medicine, Palacký University, Olomouc, Czech Republic.
J Med Syst. 2000 Aug;24(4):257-64. doi: 10.1023/a:1005506015634.
On the epidermal surface there are inhomogeneities which manifest as, among other things, lower local impedance. These regions include Head's zones, sweat glands, and also the so-called acupuncture points. The aim of this paper is to examine the effect of skin perfusion on epidermal impedance at the acupuncture points. When measuring epidermis impedance in the local (acupuncture) points the method of impedance plethysmography was applied. Both the method of four electrode measurement at the constant current and the method of two electrode measurement by means of the different and indifferent electrode as well were engaged. First, we had to uncover the size of the action skin points which was made by means of a different micro-electrode developed by us. The effect of some factors on the reproducibility and comparability of the values measured was evaluated. The attention was focused mainly on the questions of the pressure of the different electrode on the skin surface, magnitude and waveform of the exciting current, and so on. The authors demonstrate the impossibility to measure changes in skin impedance in the acupuncture points, in dependence on the blood perfusion--which was due to the high serial resistance between the point measured in the acupuncture place when the four-electrode measurement was applied, on the other side.
在表皮表面存在不均匀性，表现为局部阻抗较低等情况。这些区域包括海德带、汗腺以及所谓的穴位。本文的目的是研究皮肤灌注对穴位处表皮阻抗的影响。在测量局部（穴位）的表皮阻抗时，采用了阻抗体积描记法。既采用了恒流四电极测量法，也采用了使用不同电极和无关电极的两电极测量法。首先，我们必须通过我们开发的不同微电极来确定作用皮肤点的大小。评估了一些因素对所测值的可重复性和可比性的影响。注意力主要集中在不同电极对皮肤表面的压力、激励电流的大小和波形等问题上。作者表明，在应用四电极测量时，由于穴位测量点之间存在高串联电阻，所以无法测量穴位处皮肤阻抗随血液灌注的变化。
