Abstract: A method of quantitatively determining and recording constant alternating current conscious perception threshold or current conscious pain perception threshold for the purposes of determining normality or abnormality or corresponding or related anticipated therapy or drug therapy or for monitoring nerve regeneration or functional integrity, comprising the steps of, specifically placing electrodes on the patient according to a predetermined test involving a patient' conscious response, activating a power source, using an integral micro-controller operated digital stimulator, that monitors conscious responses and does not respond to unconscious or vegetative responses and computes the threshold value and registers it after application of a constant current having regard for frequency, waveform, intensity, duration of presentation, and electrode size, calculating and registering data which may be determinative or non-determinative as produced by the integral micro-controller operated unit.

Abstract: An improved linear microdialysis probe assembly has a short semipermeable membrane portion containing a flexible, internal support or reinforcement fiber bonded to long lengths of inlet and outlet robing. Also disclosed is a method of using it to sample the interstitial fluid of a variety of soft tissues in a living animal including dermis, muscle, adipose and subcutaneous tissue, liver and tumors by pulling the fiber, and attached probe, through the tissue of interest with a needle until the membrane is positioned where desired.