Gehirn-pO2-Meßvorrichtung

摘要

The invention concerns a measuring device for determining the oxygen partial pressure in human brain tissue, the device comprising a probe (5) which, with a thin flexible hose (1) of tissue-compatible plastics material in its measuring region, surrounds an electrolyte-filled space (8) in which a polarographic cathode (11) with a delimited surface and an anode (13) are disposed. The hose (1), at least in the measuring region, is permeable to oxygen and the electrodes (11, 13) are connected at the probe (5) end outside the body to a measuring apparatus which applies a voltage source to the electrodes (11, 13) in order to generate the polarographizing voltage and determines the measuring current by means of a measurement amplifier. The measuring device is characterized in that a regenerating device is provided which, when the electrodes have been switched over, intermittently supplies current thereto with reversed polarity for a given amount of time, and in that the electrolyte is acetate.