臨床的使用に便利な脳Impedance測定装置

概要

論文の詳細を見る
The usefulness of impedance measurement in the field of neurosurgery is already recognized as well as in the field of measuring pulmonary circulatory functions. In the present report, an instrument which was newly developed so as to be able to measure the cerebral impedance suitable for clinical use using both two and four electrode method was presented.The instrument has 50 KHz sine wave oscillator and 50 μA rms constant current circuit, the impedance is measured directly on the meter and also recorded on recorder by connecting to the isolated output terminals, and it has sound display circuit paralleled to the impedance value. This is operated by dry battery for safety in clinical usage. Calibration of impedance is possible in two electrode method.The measurement of impedance using this instrument in saline and animal brain showed four electrode method was much sensitive than two electrode method, although two electrode method has advantage over four electrode method in case of measuring deep cerebral structures because of less damage on brain tissue by its simpler electrode configuration. The instrument would be very suitable for clinical impedance measurement in neurosurgery as it is able to measure both two and four electrode method.
日本医療機器学会の論文
1978-11-01