[Atraumatic measurement of intracranial pressure].
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.
Russegger
L
L
Universitätsklinik für Neurochirurgie, Innsbruck.
Ennemoser
O
O
D000293:Adolescent; D000328:Adult; D001930:Brain Injuries / Q000503:physiopathology; D001932:Brain Neoplasms / Q000503:physiopathology; D002543:Cerebral Hemorrhage / Q000503:physiopathology; D003198:Computer Simulation; D004566:Electrodes; D004568:Electrodiagnosis / Q000295:instrumentation*; D004574:Electromagnetic Fields; D005260:Female; D006801:Humans; D007427:Intracranial Pressure / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D012016:Reference Values; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*
Zur atraumatischen Messung des intrakraniellen Drucks.