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NERVE BLOCKS – SYMPATHETIC SYSTEM

Nerve blocks of the sympathetic nervous system are indicated for the control of pain where nociceptive afferents travel with the nerves of the autonomic system, or where an effect of blockade of the efferent autonomic nervous system is required. Efferent autonomic blockade has two major effects:

• Removal of the influence of catecholamines from nociceptors. • Increased blood flow.