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Clinical Autonomic Research
Erschienen in: Clinical Autonomic Research 1/2019

28.06.2018 | Review

Sudomotor function testing by electrochemical skin conductance: does it really measure sudomotor function?

verfasst von: Sharika Rajan, Marta Campagnolo, Brian Callaghan, Christopher H. Gibbons

Erschienen in: Clinical Autonomic Research | Ausgabe 1/2019

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Abstract

Objective

Electrochemical skin conductance (ESC) is a non-invasive test of sweat function developed as a potential marker of small fiber neuropathy. Here we systematically review the evolution of this device and the data obtained from studies of ESC across different diseases.

Methods

Electronic databases, including MEDLINE, and Google Scholar were searched through to February 2018. The search strategy included the following terms: “electrochemical skin conductance,” “EZSCAN,” and “Sudoscan.” The data values provided by each paper were extracted, where available, and input into tabular and figure data for direct comparison.

Results

Thirty-seven studies were included this systematic review. ESC did not change by age or gender, and there was significant variability in ESC values between diseases, some of which exceeded control values. Longitudinal studies of disease demonstrated changes in ESC that were not biologically plausible. Of the 37 studies assessed, 25 received support from the device manufacturer. The extracted data did not agree with other published normative values. Prior studies do not support claims that ESC is a measure of small fiber sensory function or autonomic function.

Conclusions

Although many papers report significant differences in ESC values between disease and control subjects, the compiled data assessed in this review raises questions about the technique. Many of the published results violate biologic plausibility. A single funding source with a vested interest in the study outcomes has supported most of the studies. Normative values are inconsistent across publications, and large combined data sets do not support a high sensitivity and specificity. Finally, there is insufficient evidence supporting the claim that Sudoscan tests sudomotor or sensory nerve fiber function.
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Metadaten
Titel
Sudomotor function testing by electrochemical skin conductance: does it really measure sudomotor function?
verfasst von
Sharika Rajan
Marta Campagnolo
Brian Callaghan
Christopher H. Gibbons
Publikationsdatum
28.06.2018
Verlag
Springer Berlin Heidelberg
Erschienen in
Clinical Autonomic Research / Ausgabe 1/2019
Print ISSN: 0959-9851
Elektronische ISSN: 1619-1560
DOI
https://doi.org/10.1007/s10286-018-0540-0

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