Show Summary Details
Page of

Thermoregulatory Sweat Test 

Thermoregulatory Sweat Test
Thermoregulatory Sweat Test

Robert D. Fealey

Page of

PRINTED FROM OXFORD MEDICINE ONLINE ( © Oxford University Press, 2022. All Rights Reserved. Under the terms of the licence agreement, an individual user may print out a PDF of a single chapter of a title in Oxford Medicine Online for personal use (for details see Privacy Policy and Legal Notice).

date: 28 June 2022

The thermoregulatory sweat test (TST) consists of giving a controlled heat and humidity stimulus to produce a generalized sweat response. The TST assesses the integrity of efferent sympathetic sudomotor pathways. The entire anterior body surface is tested for both pre- and post-ganglionic lesions. The TST can evaluate patients with symptoms of small-fiber neuropathy and demonstrate autonomic involvement in disorders such as multiple system atrophy, hyperhidrosis, and some skin disorders. An indicator powder placed on the body surface before heating provides visualization of sweating and non-sweating skin. The patient’s weight (before and after heating) and height allows calculation of total body sweat rate, and the slope of the core temperature rise with time provides an estimate of heat tolerance. Normal and abnormal TST patterns, report generation, and difficulties and pitfalls in test interpretation are described.

Access to the complete content on Oxford Medicine Online requires a subscription or purchase. Public users are able to search the site and view the abstracts for each book and chapter without a subscription.

Please subscribe or login to access full text content.

If you have purchased a print title that contains an access token, please see the token for information about how to register your code.

For questions on access or troubleshooting, please check our FAQs, and if you can't find the answer there, please contact us.