Abstract
Sympathetic nervous system blockade provides both diagnostic and therapeutic potentials in certain chronic pain states. Sympathetically maintained pain associated with complex regional pain syndrome and chronic intractable abdominal or pelvic pain are perfect examples for such conditions. Because pain relief is a subjective phenomenon, it is important to establish an objective way of assessing the success of the sympathetic blockade. This report will discuss various tests of sympathetic function that could be used in clinical practice. Special emphasis in this report will be on changes in cutaneous temperature, blood flow, provocative sweat tests, and electrical skin conduction as indicators of sympathetic function. Copyright © 2001 by W.B. Saunders Company
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