IONTOPHORESIS AND CONDUCTIVITY ANALYSIS CIRCUIT

摘要

An iontophoresis inducing circuit includes means to limit to a safe value and to control a generated direct current for connection to iontophoresis electrides on a patient in order to produce sweat. A sweat sample is collected and analyzed to detect for cystic fibrosis. A sweat analysis circuit includes solid state switching for passing current of continuously alternating polarity through the sweat sample, and nonlinear means for converting the current into a direct reading of milliequivalents of sodium chloride per liter.