We devised an objective “Sensitive Sweat Test” (SST) that detects and quantifies early changes in the function of sudomotor nerves that activate sweat glands (SGs). The SST is designed to diagnose peripheral neuropathy early, when the probability for reversal is greatest.

Chemotherapy induced and diabetic neuropathy are very common causes of neuropathy in the USA. Both result in peripheral numbness, pain, decreased sweating, abnormal circulation, and eventual weakness. Early recognition can provide a better opportunity to treat and halt neuropathy than discovery after the onset of nerve degeneration. We contend that early diagnosis can be achieved by sensitive monitoring of sweating. Unfortunately, the changes that first signal impending sweat deficiency escape detection by conventional clinical examination and current tests [1,2]. We previously reported a Dynamic Sweat Test (DST) that greatly improved sensitivity over current methods [3]. The newer SST...

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