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The quantitative sudomotor axon reflex test (QSART) was developed in 1983 by Phillip Low as a quantitative method for the identification of localized postganglionic sudomotor dysfunction. [18] Three-compartment sweat capsules are placed on the forearm, proximal and distal leg, as well as the dorsum of the foot.
One clinical test for the patient that can be performed is the QSART, or the Quantitative Sudomotor Axon Reflex Testing, which stimulates the autonomic nervous system of an individual by stimulating sweat glands through the promotion of axon reflexes. [9]
For sudomotor tests specific clinical assessments include: Sympathetic Skin Response (SSR), [ 20 ] defined as the variation in electrical potential of the skin due to sympathetic sudomotor outflow, Quantitative Sudomotor Axon Reflex Testing (QSART) [ 21 ] [ 22 ]
Electrochemical skin conductance and quantitative sudomotor axon reflex testing (QSART) measures sweating response at local body sites to evaluate the small nerve fibers that innervate sweat glands. [13] Electrochemical skin conductance has been evaluated for both early diagnosis of small fiber neuropathy and follow-up of treatment efficacy.
Cold pressor test [37] Deep breathing [37] Electrochemical skin conductance [citation needed] Hyperventilation test [37] Nerve biopsy for small fiber neuropathy [1] Quantitative sudomotor axon reflex test (QSART) [37] Testing for orthostatic intolerance [37] Thermoregulatory sweat test [37] [26] Tilt table test [37] Valsalva maneuver [37] [26]
Acquired idiopathic generalized anhidrosis appears to have a variety of etiologies. Theoretically, dysfunction or degeneration of cholinergic sympathetic nerve fibers involved in sweating (sudomotor neuropathy), dysfunction of acetylcholine receptors and/or cholinergic signals (idiopathic pure sudomotor failure may fall under this category), and primary failures of the sweat glands with ...
Idiopathic pure sudomotor failure (IPSF) is the most common cause of a rare disorder known as acquired idiopathic generalized anhidrosis (AIGA), a clinical syndrome characterized by generalized decrease or absence of sweating without other autonomic and somatic nervous dysfunctions and without persistent organic cutaneous lesions.
The Minor test (also known as Minor's test, the starch–iodine test, and the iodine–starch test), described by Victor Minor in 1928, [1] is a qualitative medical test that is used to evaluate sudomotor function (perspiration or sweating).