Russegger L, Ennemoser O
Universitätsklinik für Neurochirurgie, Innsbruck.
Wien Klin Wochenschr. 1990 Sep 28;102(18):543-7.
This paper presents a new method for measuring intracranial pressure (ICP), which is completely non-invasive by using an isolated "headband electrode". The head itself - as a dielectric--forms a capacitor. A high frequency alternating voltage field is applied to this system (1-1.5 MHz) whereby a measuring signal is obtained which depends on the dielectric properties of the head. These, in turn, primarily depend on the filling status of the intracranial space. In addition, a pulse wave can be plotted as a result of cardiac and respiratory cycles. This combined information permits the calculation of actual ICP values with the help of a simple Basic PC programme. The measuring system was tested in 20 patients with intracranial space-occupying lesions. Their ICP values were known from invasive measurement and the obtained correlation was R = 0.983.
本文提出了一种测量颅内压（ICP）的新方法，该方法通过使用一个单独的“头带电极”完全无创。头部本身作为电介质形成一个电容器。向该系统施加高频交变电压场（1 - 1.5 MHz），由此获得一个取决于头部介电特性的测量信号。而这些特性又主要取决于颅内空间的充盈状态。此外，由于心脏和呼吸周期，可以绘制出脉搏波。这些综合信息借助一个简单的Basic PC程序可以计算出实际的颅内压值。该测量系统在20例颅内占位性病变患者中进行了测试。他们的颅内压值通过有创测量已知，得到的相关性为R = 0.983。
