Title :
Electrical stimulation with Pt electrodes. VIII. Electrochemically safe charge injection limits with 0.2 ms pulses (neuronal application)
Author :
Rose, T.L. ; Robblee, L.S.
Author_Institution :
EIC Lab., Norwood, MA, USA
Abstract :
For pt.VII see J. Neurosci. Methods, vol.9, p.301-8 (1983). The charge injection limits of a Pt electrode using 0.2 ms charge balanced, biphasic current pulses range from 50 to 150 mu C/cm 2 geometric if the potential excursions of the electrode are kept below those at which H 2 or O 2 are produced. These charge densities are three to ten times smaller than the currently accepted value based on earlier experiments in which the reversible surface reactions were fully utilized and the pulse widths were longer. Several qualifying comments are made regarding the experimental results.
Keywords :
bioelectric phenomena; electrochemistry; neurophysiology; 0.2 ms; H/sub 2/; O/sub 2/; Pt electrode; charge density; electrical stimulation; electrochemically safe charge injection limits; neuronal stimulation; pulse width; reversible surface reactions; Automatic control; Control systems; Electrical stimulation; Electrodes; Hyperthermia; Imaging phantoms; Neoplasms; Temperature control; Temperature measurement; Testing; Ultrasonic imaging; Biocompatible Materials; Electric Stimulation; Electrodes; Equipment Design; Hydrogen-Ion Concentration; Platinum;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
