Sympathectomy is a surgical procedure that destroys nerves in
the sympathetic nervous system.
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Some studies report that sympathectomy relieves causalgia in as
many as 75% of cases.
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The spinal cord segments should be saved during a lumbar
sympathectomy.
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Sympathectomy is performed to relieve intermittent constricting
of blood vessels (ischemia ) when the fingers, toes, ears, or nose
are exposed to cold (Raynaud's phenomenon).