The sudoscan gives us an important brief information about the sweat gland function (sudomotor function). The test lasts only about 5 minutes and allows a screening of the function of so-called small fibers in the skin. Small Fibers is the name that summarizes all unmyelinated and myelin-deficient nerve fibers. With the sudoscan, the sudomotor nerve fibers are electrically stimulated, which transmit signals to the sweat glands. For this, hands and feet are placed on the contact surfaces of the device. In response to a single, barely noticeable electrical stimulus on the skin surface, the sweat glands receive the signal to release sweat. The resulting minor change in skin moisture is registered as a skin resistance change by the device. The test provides an overview of whether the sudomotor nerve function deviates from the norm, how pronounced the deviation is, and whether side differences exist in the function of these small fibers.
With a further development of the stimulation method, the EzScan, a prediction can be made of the risk of developing a metabolic, eg diabetic polyneuropathy, in the coming years.