Sudomotor Test
Sudomotor dysfunction is one of the earliest detectable neurophysiologic abnormalities in distal small fiber neuropathy. Sudomotor is a simple 2-minute test used to evaluate postganglionic sympathetic cholinergic activation through measuring (axon-reflex mediated) galvanic sweat response. Sweat glands are stimulated via iontophoresis of a cholinergic agent and the sweat production is measured as an increase of humidity through a foot electrode.
Conditions for SUDO test:
- Diabetes (test will help to complete your PQRS measures)
- Paresthesia (numbness, tingling sensations) in feet and/or legs
- Burning and/or cold sensations in feet
- Weakness sensations in legs